CN102977351A - Preparation method of modified polyester resin and coating containing polyester resin - Google Patents
Preparation method of modified polyester resin and coating containing polyester resin Download PDFInfo
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- CN102977351A CN102977351A CN2012104927718A CN201210492771A CN102977351A CN 102977351 A CN102977351 A CN 102977351A CN 2012104927718 A CN2012104927718 A CN 2012104927718A CN 201210492771 A CN201210492771 A CN 201210492771A CN 102977351 A CN102977351 A CN 102977351A
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- China
- Prior art keywords
- weight
- heating
- polyester resin
- modified polyester
- trihydric alcohol
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Links
- 229920001225 polyester resin Polymers 0.000 title claims abstract description 110
- 239000004645 polyester resin Substances 0.000 title claims abstract description 110
- 238000002360 preparation method Methods 0.000 title claims abstract description 58
- 239000011248 coating agent Substances 0.000 title claims abstract description 40
- 238000000576 coating method Methods 0.000 title claims abstract description 40
- 238000010438 heat treatment Methods 0.000 claims abstract description 94
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 52
- 239000010703 silicon Substances 0.000 claims abstract description 52
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 51
- QQVIHTHCMHWDBS-UHFFFAOYSA-N isophthalic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-N 0.000 claims abstract description 50
- 239000000203 mixture Substances 0.000 claims abstract description 45
- SCPYDCQAZCOKTP-UHFFFAOYSA-N silanol Chemical compound [SiH3]O SCPYDCQAZCOKTP-UHFFFAOYSA-N 0.000 claims abstract description 32
- 238000000034 method Methods 0.000 claims abstract description 31
- 238000004132 cross linking Methods 0.000 claims abstract description 29
- 239000003054 catalyst Substances 0.000 claims abstract description 27
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000003960 organic solvent Substances 0.000 claims abstract description 22
- 238000002156 mixing Methods 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 13
- 239000007787 solid Substances 0.000 claims abstract description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 71
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims description 58
- 229920002545 silicone oil Polymers 0.000 claims description 48
- 238000001816 cooling Methods 0.000 claims description 32
- 239000002904 solvent Substances 0.000 claims description 27
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 22
- 239000008096 xylene Substances 0.000 claims description 22
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 claims description 20
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 20
- LLHKCFNBLRBOGN-UHFFFAOYSA-N propylene glycol methyl ether acetate Chemical compound COCC(C)OC(C)=O LLHKCFNBLRBOGN-UHFFFAOYSA-N 0.000 claims description 19
- 238000009835 boiling Methods 0.000 claims description 18
- 239000000945 filler Substances 0.000 claims description 16
- YHWCPXVTRSHPNY-UHFFFAOYSA-N butan-1-olate;titanium(4+) Chemical group [Ti+4].CCCC[O-].CCCC[O-].CCCC[O-].CCCC[O-] YHWCPXVTRSHPNY-UHFFFAOYSA-N 0.000 claims description 13
- SLCVBVWXLSEKPL-UHFFFAOYSA-N neopentyl glycol Chemical compound OCC(C)(C)CO SLCVBVWXLSEKPL-UHFFFAOYSA-N 0.000 claims description 12
- ZJCCRDAZUWHFQH-UHFFFAOYSA-N Trimethylolpropane Chemical compound CCC(CO)(CO)CO ZJCCRDAZUWHFQH-UHFFFAOYSA-N 0.000 claims description 11
- 239000004408 titanium dioxide Substances 0.000 claims description 11
- 239000000377 silicon dioxide Substances 0.000 claims description 10
- 235000012239 silicon dioxide Nutrition 0.000 claims description 10
- LAVARTIQQDZFNT-UHFFFAOYSA-N 1-(1-methoxypropan-2-yloxy)propan-2-yl acetate Chemical compound COCC(C)OCC(C)OC(C)=O LAVARTIQQDZFNT-UHFFFAOYSA-N 0.000 claims description 8
- JONNRYNDZVEZFH-UHFFFAOYSA-N 2-(2-butoxypropoxy)propyl acetate Chemical compound CCCCOC(C)COC(C)COC(C)=O JONNRYNDZVEZFH-UHFFFAOYSA-N 0.000 claims description 8
- RXGUIWHIADMCFC-UHFFFAOYSA-N 2-Methylpropyl 2-methylpropionate Chemical compound CC(C)COC(=O)C(C)C RXGUIWHIADMCFC-UHFFFAOYSA-N 0.000 claims description 8
- FFWSICBKRCICMR-UHFFFAOYSA-N 5-methyl-2-hexanone Chemical compound CC(C)CCC(C)=O FFWSICBKRCICMR-UHFFFAOYSA-N 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 6
- QWGRWMMWNDWRQN-UHFFFAOYSA-N 2-methylpropane-1,3-diol Chemical compound OCC(C)CO QWGRWMMWNDWRQN-UHFFFAOYSA-N 0.000 claims description 5
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 5
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 5
- QXJQHYBHAIHNGG-UHFFFAOYSA-N trimethylolethane Chemical compound OCC(C)(CO)CO QXJQHYBHAIHNGG-UHFFFAOYSA-N 0.000 claims description 5
- SVONRAPFKPVNKG-UHFFFAOYSA-N 2-ethoxyethyl acetate Chemical compound CCOCCOC(C)=O SVONRAPFKPVNKG-UHFFFAOYSA-N 0.000 claims description 4
- 125000001511 cyclopentyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C1([H])[H] 0.000 claims description 4
- -1 ethoxyl Chemical group 0.000 claims description 4
- XXMIOPMDWAUFGU-UHFFFAOYSA-N hexane-1,6-diol Chemical compound OCCCCCCO XXMIOPMDWAUFGU-UHFFFAOYSA-N 0.000 claims description 4
- VXQBJTKSVGFQOL-UHFFFAOYSA-N 2-(2-butoxyethoxy)ethyl acetate Chemical compound CCCCOCCOCCOC(C)=O VXQBJTKSVGFQOL-UHFFFAOYSA-N 0.000 claims description 3
- QUVMSYUGOKEMPX-UHFFFAOYSA-N 2-methylpropan-1-olate;titanium(4+) Chemical compound [Ti+4].CC(C)C[O-].CC(C)C[O-].CC(C)C[O-].CC(C)C[O-] QUVMSYUGOKEMPX-UHFFFAOYSA-N 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 3
- 150000002148 esters Chemical class 0.000 claims description 2
- GRVDJDISBSALJP-UHFFFAOYSA-N methyloxidanyl Chemical group [O]C GRVDJDISBSALJP-UHFFFAOYSA-N 0.000 claims description 2
- 229920000728 polyester Polymers 0.000 abstract description 19
- 238000006243 chemical reaction Methods 0.000 abstract description 18
- XSTXAVWGXDQKEL-UHFFFAOYSA-N Trichloroethylene Chemical compound ClC=C(Cl)Cl XSTXAVWGXDQKEL-UHFFFAOYSA-N 0.000 abstract 8
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 150000002009 diols Chemical class 0.000 abstract 1
- 229920000642 polymer Polymers 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- ZMXDDKWLCZADIW-UHFFFAOYSA-N dimethylformamide Substances CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 31
- WFDIJRYMOXRFFG-UHFFFAOYSA-N Acetic anhydride Chemical compound CC(=O)OC(C)=O WFDIJRYMOXRFFG-UHFFFAOYSA-N 0.000 description 30
- WGTYBPLFGIVFAS-UHFFFAOYSA-M tetramethylammonium hydroxide Chemical compound [OH-].C[N+](C)(C)C WGTYBPLFGIVFAS-UHFFFAOYSA-M 0.000 description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 23
- 238000003756 stirring Methods 0.000 description 21
- 239000003973 paint Substances 0.000 description 20
- 229920001296 polysiloxane Polymers 0.000 description 18
- HMMGMWAXVFQUOA-UHFFFAOYSA-N octamethylcyclotetrasiloxane Chemical compound C[Si]1(C)O[Si](C)(C)O[Si](C)(C)O[Si](C)(C)O1 HMMGMWAXVFQUOA-UHFFFAOYSA-N 0.000 description 15
- 239000000049 pigment Substances 0.000 description 14
- 229920005989 resin Polymers 0.000 description 14
- 239000011347 resin Substances 0.000 description 14
- 239000012752 auxiliary agent Substances 0.000 description 12
- 239000012153 distilled water Substances 0.000 description 12
- 238000012360 testing method Methods 0.000 description 12
- 230000015572 biosynthetic process Effects 0.000 description 11
- 238000003786 synthesis reaction Methods 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 10
- 238000004821 distillation Methods 0.000 description 10
- 238000011049 filling Methods 0.000 description 10
- 238000005227 gel permeation chromatography Methods 0.000 description 10
- 238000000227 grinding Methods 0.000 description 10
- 239000002245 particle Substances 0.000 description 10
- 150000003384 small molecules Chemical class 0.000 description 10
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 8
- QYMFNZIUDRQRSA-UHFFFAOYSA-N dimethyl butanedioate;dimethyl hexanedioate;dimethyl pentanedioate Chemical compound COC(=O)CCC(=O)OC.COC(=O)CCCC(=O)OC.COC(=O)CCCCC(=O)OC QYMFNZIUDRQRSA-UHFFFAOYSA-N 0.000 description 8
- 238000009472 formulation Methods 0.000 description 7
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 description 6
- 238000001704 evaporation Methods 0.000 description 6
- 229920006395 saturated elastomer Polymers 0.000 description 5
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 4
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- 239000002671 adjuvant Substances 0.000 description 4
- NAHIZHJHSUSESF-UHFFFAOYSA-N perchloryl acetate Chemical compound CC(=O)OCl(=O)(=O)=O NAHIZHJHSUSESF-UHFFFAOYSA-N 0.000 description 4
- 238000005336 cracking Methods 0.000 description 3
- JJQZDUKDJDQPMQ-UHFFFAOYSA-N dimethoxy(dimethyl)silane Chemical compound CO[Si](C)(C)OC JJQZDUKDJDQPMQ-UHFFFAOYSA-N 0.000 description 3
- YYLGKUPAFFKGRQ-UHFFFAOYSA-N dimethyldiethoxysilane Chemical compound CCO[Si](C)(C)OCC YYLGKUPAFFKGRQ-UHFFFAOYSA-N 0.000 description 3
- BFXIKLCIZHOAAZ-UHFFFAOYSA-N methyltrimethoxysilane Chemical compound CO[Si](C)(OC)OC BFXIKLCIZHOAAZ-UHFFFAOYSA-N 0.000 description 3
- 229920002050 silicone resin Polymers 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- CPUDPFPXCZDNGI-UHFFFAOYSA-N triethoxy(methyl)silane Chemical compound CCO[Si](C)(OCC)OCC CPUDPFPXCZDNGI-UHFFFAOYSA-N 0.000 description 3
- JCVQKRGIASEUKR-UHFFFAOYSA-N triethoxy(phenyl)silane Chemical compound CCO[Si](OCC)(OCC)C1=CC=CC=C1 JCVQKRGIASEUKR-UHFFFAOYSA-N 0.000 description 3
- DNIAPMSPPWPWGF-VKHMYHEASA-N (+)-propylene glycol Chemical compound C[C@H](O)CO DNIAPMSPPWPWGF-VKHMYHEASA-N 0.000 description 2
- YPFDHNVEDLHUCE-UHFFFAOYSA-N 1,3-propanediol Substances OCCCO YPFDHNVEDLHUCE-UHFFFAOYSA-N 0.000 description 2
- 229940035437 1,3-propanediol Drugs 0.000 description 2
- FUWDFGKRNIDKAE-UHFFFAOYSA-N 1-butoxypropan-2-yl acetate Chemical compound CCCCOCC(C)OC(C)=O FUWDFGKRNIDKAE-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000004721 Polyphenylene oxide Substances 0.000 description 2
- 229920004482 WACKER® Polymers 0.000 description 2
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 2
- 239000001361 adipic acid Substances 0.000 description 2
- 229920000180 alkyd Polymers 0.000 description 2
- 239000006229 carbon black Substances 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000006482 condensation reaction Methods 0.000 description 2
- 238000005886 esterification reaction Methods 0.000 description 2
- 125000001301 ethoxy group Chemical group [H]C([H])([H])C([H])([H])O* 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000003301 hydrolyzing effect Effects 0.000 description 2
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 229920000570 polyether Polymers 0.000 description 2
- 229920000166 polytrimethylene carbonate Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- ZNOCGWVLWPVKAO-UHFFFAOYSA-N trimethoxy(phenyl)silane Chemical compound CO[Si](OC)(OC)C1=CC=CC=C1 ZNOCGWVLWPVKAO-UHFFFAOYSA-N 0.000 description 2
- DNIAPMSPPWPWGF-GSVOUGTGSA-N (R)-(-)-Propylene glycol Chemical compound C[C@@H](O)CO DNIAPMSPPWPWGF-GSVOUGTGSA-N 0.000 description 1
- YXRKNIZYMIXSAD-UHFFFAOYSA-N 1,6-diisocyanatohexane Chemical compound O=C=NCCCCCCN=C=O.O=C=NCCCCCCN=C=O.O=C=NCCCCCCN=C=O YXRKNIZYMIXSAD-UHFFFAOYSA-N 0.000 description 1
- DKPFZGUDAPQIHT-UHFFFAOYSA-N Butyl acetate Natural products CCCCOC(C)=O DKPFZGUDAPQIHT-UHFFFAOYSA-N 0.000 description 1
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 235000011037 adipic acid Nutrition 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 125000003545 alkoxy group Chemical group 0.000 description 1
- OHJMTUPIZMNBFR-UHFFFAOYSA-N biuret Chemical compound NC(=O)NC(N)=O OHJMTUPIZMNBFR-UHFFFAOYSA-N 0.000 description 1
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- XCJYREBRNVKWGJ-UHFFFAOYSA-N copper(II) phthalocyanine Chemical compound [Cu+2].C12=CC=CC=C2C(N=C2[N-]C(C3=CC=CC=C32)=N2)=NC1=NC([C]1C=CC=CC1=1)=NC=1N=C1[C]3C=CC=CC3=C2[N-]1 XCJYREBRNVKWGJ-UHFFFAOYSA-N 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 230000032050 esterification Effects 0.000 description 1
- FUZZWVXGSFPDMH-UHFFFAOYSA-N hexanoic acid Chemical compound CCCCCC(O)=O FUZZWVXGSFPDMH-UHFFFAOYSA-N 0.000 description 1
- YOBAEOGBNPPUQV-UHFFFAOYSA-N iron;trihydrate Chemical compound O.O.O.[Fe].[Fe] YOBAEOGBNPPUQV-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- DNIAPMSPPWPWGF-UHFFFAOYSA-N monopropylene glycol Natural products CC(O)CO DNIAPMSPPWPWGF-UHFFFAOYSA-N 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000006068 polycondensation reaction Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920005862 polyol Polymers 0.000 description 1
- 150000003077 polyols Chemical class 0.000 description 1
- 229960004063 propylene glycol Drugs 0.000 description 1
- 235000013772 propylene glycol Nutrition 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 238000002411 thermogravimetry Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
Landscapes
- Paints Or Removers (AREA)
- Polyesters Or Polycarbonates (AREA)
- Silicon Polymers (AREA)
Abstract
The invention relates to a preparation method of a modified polyester resin. The method comprises the following steps of: mixing triol, diol with molar weight being 0.02-0.1 time that of triol and isophthalic acid with molar weight being 0.5-1.0 time that of triol uniformly, then heating the mixture to 70-90 DEG C and adding silanol with weight being 0.05-0.1 time that of triol and dimethylbenzene with weight being 0.02-0.1 time that of triol; heating the materials at 180-210 DEG C for 1-3 hours, then raising the temperature to 220-240 DEG C and carrying out heating for 1-3 hours; reducing the temperature to 90 DEG C and adding organic solvents with weight being 1.0-1.5 times that of triol, organic silicon oligomers with weight being 1.5-2.5 times that of triol and a crosslinking catalyst with weight being 1-5% that of triol; heating the materials to 110-120 DEG C and carrying out heating for 2-3 hours; and reducing the temperature to 90 DEG C, finally adding other organic solvents and regulating the solid content to be 60-70%. The preparation method has the beneficial effects that as silanol is added when polyester is synthesized, the heat resistance and flexibility of polyester are improved; as the organic silicon oligomers and polyester are subjected to crosslinking reaction, the heat resistance of polymer is improved; and the polyester resin prepared by the method can be used for preparing a coating with high temperature resistance and good flexibility.
Description
Technical Field
The invention relates to the field of organic high molecular compounds, relates to a high molecular compound obtained by esterification, and particularly relates to polyester resin.
Background
The polyester resin has excellent metal adhesion, high hardness, high physical and mechanical performance, high chemical corrosion resistance and wide application in paint industry. However, polyester resin has the disadvantages of poor heat resistance, low water resistance and poor weather resistance, and the application of the polyester resin in high-temperature resistant coating is limited. In order to improve the high temperature resistance of polyester resins, other resins are often used to chemically modify the polyester resins. The silicone resin has excellent heat resistance, weather resistance, water resistance and lower surface tension. The organic silicon resin is used for modifying the polyester resin, so that the heat resistance, the water resistance and the chemical resistance of the polyester resin can be improved. For example, in Mazhou dynasty et al (Mazhou dynasty et al, preparation of silanol-modified polyester resin, plating and coating, 2011, stage 02), saturated hydroxy silane is used as a modifier, 1, 2-propanediol and adipic acid are subjected to polycondensation reaction to prepare modified alkyd type polyester resin, and the modified alkyd type polyester resin has the adhesion of level 1, the impact strength of 4.5MPa and the hardness of 2H; but has a disadvantage of heat resistance. The organosilicon modified polyester resin is designed and synthesized by yaojiangliu and the like (research on high-functional organosilicon modified polyester resin, Shanghai paint, 2007, 45 (7), 4-6), and the resin, a polyurethane curing agent HDI biuret and an HDI trimer are prepared into a two-component paint. The coating has excellent weather resistance and good adhesive force and elasticity, but the modified polyester must be matched with a polyurethane curing agent for use, so that the coating has the defect of inconvenient and rapid use. Lihuagong and the like (Lihuagong and the like, synthesis of organic silicon modified hydroxyl-terminated polyester, synthetic resin and plastic, 2012, 29 (2): 20-23) adopt organic silicon prepolymer to modify the hydroxyl-terminated polyester, so that the heat resistance and the salt water resistance of the polyester are improved, but the modified polyester has poor flexibility and low cold and hot alternation resistance. The invention patent application with the publication number of CN102504265A uses saturated polyester and epoxy resin to crosslink an organic silicon intermediate to prepare polyester modified organic silicon resin, and the resin has good heat resistance, low surface tension, excellent boiling resistance, acid and alkali resistance, but poor flexibility, and can crack under the condition of high and low temperature alternation, thereby limiting the application.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a preparation method of modified polyester resin, and the modified polyester prepared by the method has the advantages of good heat resistance and good flexibility.
The technical problem scheme of the invention is as follows:
a process for the preparation of a modified polyester resin, which process comprises the steps of:
uniformly mixing trihydric alcohol, dihydric alcohol with the molar weight of 0.02-0.1 time of trihydric alcohol and isophthalic acid with the molar weight of 0.5-1.0 time of trihydric alcohol, heating to 70-90 ℃, and adding silanol with the weight of 0.05-0.1 time of trihydric alcohol and xylene with the weight of 0.02-0.1 time of trihydric alcohol; heating at 180-210 ℃ for 1-3 h, heating to 220-240 ℃ for 1-3 h; then, cooling to 90 ℃, adding an organic solvent which is 1.0-1.5 times of the weight of the trihydric alcohol, an organic silicon oligomer which is 1.5-2.5 times of the weight of the trihydric alcohol and a crosslinking catalyst which is 1-5% of the weight of the trihydric alcohol, heating to 110-120 ℃, and heating for 2-3 hours; finally, cooling to 90 ℃, and adding an organic solvent to adjust the solid content to 60-70%; wherein,
the trihydric alcohol is one or two of trimethylolethane and trimethylolpropane;
the dihydric alcohol is one or more than two of neopentyl glycol, 2-methyl 1, 3-propylene glycol and 1, 6-hexanediol;
the silanol is one or more than two of heptapoly (cyclopentyl) silsesquioxane trisilicol, heptaphenyl silsesquioxane trisilicol, heptaisobutyl silsesquioxane trisilicol and hydroxyl silicone oil; wherein the weight average molecular weight of the hydroxyl silicone oil is 300-1000, and the hydroxyl silicone oil contains 3-10 w% of hydroxyl;
the weight average molecular weight of the organic silicon oligomer is 800-2000, and the organic silicon oligomer contains 3-20 w% of hydroxyl and 2.5-15 w% of methoxyl or ethoxyl;
the crosslinking catalyst is tetrabutyl titanate or tetraisobutyl titanate;
the organic solvent is one or more than two of butanol, propylene glycol methyl ether acetate, dipropylene glycol methyl ether acetate and dipropylene glycol butyl ether acetate.
The preparation method can be used for preparing the hydroxyl silicone oil from KR220L of Xinyue company and W-62m of Wake company, and can also be prepared by the following method:
adding octamethylcyclotetrasiloxane, N' -dimethylformamide and tetramethylammonium hydroxide accounting for 0.01% of the weight of octamethylcyclotetrasiloxane into a reactor, heating to 80-90 ℃ under the protection of nitrogen, dropwise adding distilled water accounting for 0.2-6% of the weight of octamethylcyclotetrasiloxane while stirring, reacting at constant temperature for 8-10 hours after dropwise adding, heating to 150 ℃ for reacting for 1 hour, and removing low-boiling-point substances under reduced pressure to obtain the product.
The above-mentioned silicone oligomer can be obtained by a hydrolytic condensation reaction of siloxanes such as monomethyltriethoxysilane, dimethyldiethoxysilane and monophenyltriethoxysilane, or by a hydrolytic condensation reaction of siloxanes such as monomethyltrimethoxysilane, dimethyldimethoxysilane and monophenyltrimethoxy. Wherein the siloxane is hydrolyzed and condensed by the conventional siloxane in the field, and the process and reaction conditions are conventional techniques which should be understood by those skilled in the art.
The preparation method, wherein the organic silicon oligomer can also be one or more than two of KR211 of Xinyue company, KR212 of Xinyue company, KR214 of Xinyue company, KR216 of Xinyue company, IC836 of Wake company, KR213 of Xinyue company, KR9218 of Xinyue company, KR217 of Xinyue company, 233 of Dow Corning company, 249 of Dow Corning company, Z-6108 of Dow Corning company, 3074 of Dow Corning company and 3037 of Dow Corning company.
The above-mentioned production process, wherein,
the crosslinking catalyst is preferably tetrabutyl titanate;
the silanol is preferably hydroxyl silicone oil, the weight average molecular weight of the hydroxyl silicone oil is preferably 500-800, and the hydroxyl silicone oil contains 3-8 w% of hydroxyl.
The modified polyester resin prepared by the method has the following advantages:
the preparation method comprises the following steps of reacting trihydric alcohol, dihydric alcohol, isophthalic acid and silanol to prepare saturated polyester resin, wherein hydroxyl on the trihydric alcohol or the dihydric alcohol and carboxyl on the isophthalic acid are subjected to esterification reaction, and meanwhile, the hydroxyl on the trihydric alcohol or the dihydric alcohol and silicon hydroxyl on the silanol are subjected to reaction, so that a flexible organic silicon chain segment is embedded into the saturated polyester, and the heat resistance, the flexibility and the cold and heat change resistance of a coating film of the polyester are improved.
On the other hand, saturated polyester resin and organic silicon oligomer react to prepare modified polyester resin, wherein hydroxyl on the saturated polyester resin can generate crosslinking reaction with alkoxy or silicon hydroxyl on the organic silicon oligomer under the action of a crosslinking catalyst, so that the heat resistance of the polyester resin is improved.
The modified polyester resin can be applied to preparing high-temperature-resistant low-surface-energy paint which has good heat resistance, flexibility and cold and heat change resistance.
The coating disclosed by the invention contains 60-80 w% of modified polyester resin prepared by the method, 10-20 w% of high-temperature-resistant pigment filler and 5-20 w% of high-boiling-point solvent, wherein the modified polyester resin is prepared by the method disclosed by the invention.
The high boiling point solvent is one or more than two of dibasic acid ester mixture, ethylene glycol ethyl ether acetate, diethylene glycol butyl ether acetate, isobutyl isobutyrate, 3-ethyl propionate and methyl isoamyl ketone;
the filler is a high-temperature resistant filler commonly used in the field, and can be one or more than two of titanium dioxide, silicon dioxide and silicon carbide.
The coating can also be added with high-temperature resistant pigment commonly used in the field, and the high-temperature resistant pigment can be inorganic high-temperature resistant pigment such as carbon black, iron oxide red and the like, and can also be organic high-temperature resistant pigment such as phthalocyanine blue and the like.
The coating can also be added with organosilicon auxiliary agents commonly used in the field, for example, the functions of leveling, defoaming, pigment wetting, viscosity regulation and the like are realized. The organosilicon adjuvant can also be silicone oil or polyether modified organosilicon adjuvant, such as CoatOSil series polyether modified organosilicon adjuvant from Mitigo high-tech materials Co. The kind and amount of the organosilicon adjuvant can be determined by those skilled in the art according to the requirement, and the amount recommended by the inventor is 1-5 w%.
The preparation method of the coating is a preparation method commonly used in the field, namely the coating is prepared by mixing modified polyester resin, pigment, filler, organosilicon auxiliary agent and high-boiling-point solvent.
The coating is prepared from the modified polyester resin, so that the coating has high heat resistance and good flexibility.
Detailed Description
The following are non-limiting examples of the technical solutions of the present invention.
Example 1:
1) preparation of modified polyester resins
a) Consists of the following components:
trihydric alcohol: trimethylolpropane 134g (1.0 mol);
a dihydric alcohol: neopentyl glycol 10.4g (0.1 mol);
isophthalic acid: 107.9g (0.65 mol)
Silanol: KR220L 6.7.7 g from Xin Yuan company
Xylene: 2.74g
Silicone oligomer: it is believed that the silicone resin KR 150229 g
Crosslinking catalyst: tetrabutyl titanate 2.5g
Organic solvent: propylene glycol methyl ether acetate 310g
b) The synthesis steps are as follows:
mixing trihydric alcohol, dihydric alcohol and isophthalic acid uniformly, heating to 80 ℃, and adding silanol and xylene; heating at 180 deg.C for 1h, heating to 240 deg.C, and heating for 1 h; cooling to 90 ℃, and adding an organic solvent, an organic silicon oligomer and a crosslinking catalyst which are 1.0 time of the weight of the trihydric alcohol; heating to 110 ℃, and heating for 2 h; cooling to 90 deg.C, and adding the rest organic solvent.
c) Modified polyester resin Properties
Combination of properties of modified polyester resins
Solvent resistance 1: at 25 ℃, the wipe was rubbed back and forth 100 times with butanone.
Heat resistance: baking the test piece at 180 ℃ for 2h, putting the test piece into a constant temperature box type electric furnace checked by a potential difference meter, raising the temperature by 5 ℃/min, beginning timing along with the temperature of the furnace to the temperature required by the experiment, taking out the test piece after the test piece is continuously heated to room temperature (25 ℃), and observing the surface condition of the coating by using a magnifying glass, wherein if the test piece has no cracking or falling phenomena, the heat resistance of the coating is proved to be good.
2) Coating material
a) Composition of
Modified polyester resin: 100g of the modified polyester resin prepared above;
filling: 60g of titanium dioxide;
organosilicon auxiliary agent: silicone oil
/350cst 8g；
High boiling point solvent: dibasic ester mixture (DBE) 5 g.
b) Preparation process
Uniformly mixing the filler, the modified polyester resin, the organic silicon assistant and the high-boiling-point solvent, and adding the mixture into a grinding machine to grind the mixture to the required particle size to obtain the modified polyester resin.
c) Performance of
Performance index of paint
Solvent resistance 1: at 25 ℃, the wipe was rubbed back and forth 100 times with butanone.
Heat resistance: baking the test piece at 180 ℃ for 2h, putting the test piece into a constant temperature box type electric furnace checked by a potential difference meter, raising the temperature by 5 ℃/min, beginning timing along with the temperature of the furnace to the temperature required by the experiment, taking out the test piece after the test piece is continuously heated to room temperature (25 ℃), and observing the surface condition of the coating by using a magnifying glass, wherein if the test piece has no cracking or falling phenomena, the heat resistance of the coating is proved to be good.
Water boiling resistance: baking the test piece at 180 ℃ for 2h, cooling to room temperature, then placing the test piece in distilled water at 100 ℃, and heating until the paint film is damaged, such as blistering, light loss, discoloration, cracking and the like.
Example 2:
1) preparation of modified polyester resins
a) Consists of the following components:
trihydric alcohol: trimethylolpropane 134g (1.0 mol);
a dihydric alcohol: neopentyl glycol 1.04g (0.01 mol); 2-methyl-1, 3-propanediol 0.9g (0.01mol)
Isophthalic acid: 83g (0.5 mol)
Silanol: 7.4g of heptapoly (cyclopentyl) silsesquioxane trissilanol and 6.0g of heptaisobutylsilsesquioxane trissilanol
Xylene: 13.4g
Silicone oligomer: CRS 150100 g, KR 21271 g from CRS
Crosslinking catalyst: tetrabutyl titanate 1.34g
Organic solvent: propylene glycol methyl ether acetate 151g butanol 34g
b) The synthesis steps are as follows:
mixing trihydric alcohol, dihydric alcohol and isophthalic acid uniformly, heating to 80 ℃, and adding silanol and xylene; heating at 200 deg.C for 3 hr, heating to 220 deg.C, and heating for 2 hr; cooling to 90 ℃, and adding propylene glycol methyl ether acetate, organic silicon oligomer and a crosslinking catalyst; heating to 115 deg.C for 3 h; the temperature is reduced to 90 ℃, and finally butanol is added.
c) Modified polyester resin Properties
Combination of properties of modified polyester resins
2) Coating material
a) Composition of
Modified polyester resin: 160g of modified polyester resin prepared in the step 1;
filling: 20g of titanium dioxide; 3g of silicon dioxide, 5g of silicon carbide
Organosilicon auxiliary agent: silicone oil
/350cst1g。
High boiling point solvent: dibasic ester mixture (DBE) 5 g; ethylene glycol ethyl ether acetate (CAC): 5g of the total weight.
b) Preparation process
Uniformly mixing the filler, the modified polyester resin, the high-boiling-point solvent and the auxiliary agent, and adding the mixture into a grinding machine to grind the mixture to the required particle size to obtain the modified polyester resin.
c) Performance of
Performance index of paint
Example 3:
1) preparation of hydroxy silicone oil
a) Formulation of
Octamethylcyclotetrasiloxane: 200g
Tetramethyl ammonium hydroxide: 0.02g
Water: 7.4g
N, N' -Dimethylformamide (DMF): 60g of
b) Preparation process
Adding octamethylcyclotetrasiloxane, tetramethylammonium hydroxide and DMF (dimethyl formamide) in a reactor provided with a condenser tube, a thermometer, a dropping funnel and a stirrer in sequence according to a ratio, starting stirring and heating up, heating up to 90 ℃, keeping the temperature constant, dropwise adding distilled water under stirring, after dropwise adding, reacting at constant temperature for 9.5 hours, heating up to 150 ℃, reacting for 1 hour, cooling to 80 ℃, starting reduced pressure distillation, controlling the pressure at 0.06MPa, evaporating off small molecules generated in the reaction process, cooling to room temperature, and adjusting the solid content to 60% to obtain 157g of hydroxyl silicone oil.
c) Performance of
The weight average molecular weight of the hydroxyl silicone oil is detected by adopting gel permeation chromatography, and the result is 504; the hydroxyl content of the hydroxyl silicone oil was measured by an acetic anhydride method, and found to be 8.2 w%.
2) Preparation of Silicone oligomers
a) Composition of
Monomethyltrimethoxysilane: 42.0g (0.28 mol)
Dimethyl dimethoxy silane: 18.7g (0.14 mol)
Mono-phenyltrimethoxysilane: 123.0g (0.58 mol),
b) preparation process
Siloxane and 4.5mmol of hydrochloric acid are sequentially added into a reactor provided with a condenser tube, a thermometer, a dropping funnel and a stirrer according to the proportion, stirring and heating are started, the temperature is kept constant after the temperature is raised to 60 ℃, 31.7g of distilled water is dropwise added under stirring, after the dropwise addition is finished, constant temperature reaction is carried out for 3 hours, reduced pressure distillation is started, the pressure is controlled to be 0.06MPa, small molecules generated in the reaction process are evaporated, the temperature is cooled to room temperature, the solid content is adjusted to be 60%, and 290g of organic silicon oligomer is obtained.
c) Performance of
The weight average molecular weight of the organic silicon oligomer is detected by adopting gel permeation chromatography, and the result is 802; the hydroxyl content of the organic silicon oligomer is measured by an acetic anhydride method, and the result is 10.6 w%; the methoxy content of the organosilicon oligomer is determined by an acetyl perchlorate method, and the result is 7.4 w%; R/Si = 1.14; ph/Me = 1.04.
2) Preparation of modified polyester resins
a) Consists of the following components:
trihydric alcohol: 120g (1.0 mol) of trimethylolethane;
a dihydric alcohol: neopentyl glycol 1.04g (0.01 mol); 2.7g (0.03 mol) of 2-methyl-1, 3-propanediol, and 1.18g (0.01mol) of 1, 6-hexanediol
Silanol: 7g of the Hydroxysilicol prepared in step 1, 5g of heptaphenylsilsesquioxane trisilicol
Isophthalic acid: 166g (1.0 mol)
Xylene: 9.6g
Silicone oligomer: 200g of the organosilicon intermediate prepared in step 2, 249100 g of Dow Corning Co
Crosslinking catalyst: 2.5g of tetraisobutyl titanate and 3.5g of tetrabutyl titanate
Organic solvent: dipropylene glycol methyl ether acetate 180g, dipropylene glycol butyl ether acetate 130g
b) The synthesis steps are as follows:
mixing trihydric alcohol, dihydric alcohol and silanol uniformly, heating to 85 ℃, and adding isophthalic acid and xylene; heating at 210 deg.C for 2.5h, heating to 235 deg.C, and heating for 3 h; cooling to 90 ℃, and adding dipropylene glycol methyl ether acetate, an organic silicon oligomer and a crosslinking catalyst; heating to 120 deg.C for 2.5 h; cooling to 90 deg.C, and adding dipropylene glycol butyl ether acetate.
c) Modified polyester resin Properties
Combination of properties of modified polyester resins
3) Coating material
a) Composition of
Modified polyester resin: 100g of the modified polyester resin prepared in the step 2;
filling: 52g of titanium dioxide; 20g of silicon dioxide;
pigment: phthalein blue 10g, iron red 10g
Organosilicon auxiliary agent: CoatOSil 70014 g; silicone oil
/350cst 6g；
High boiling point solvent: 5g of diethylene glycol butyl ether acetate; and 5g of butyl acetate.
b) Preparation process
The pigment, the filler, the modified polyester resin, the organic silicon assistant and the high-boiling-point solvent are uniformly mixed and added into a grinding machine to be ground to the required particle size, and the modified polyester resin is obtained.
c) Coating performance
Performance index of paint
Example 4:
1) preparation of modified polyester resins
a) Consists of the following components:
trihydric alcohol: trimethylolpropane 67g (0.5 mol); trimethylolethane 60g (0.5 mol);
a dihydric alcohol: 1.8g (0.02 mol) of 2-methyl-1, 3-propanediol, 1.18g (0.01mol) of 1, 6-hexanediol
Silanol: heptapoly (cyclopentyl) silsesquioxane trissilanol 6.35g
Isophthalic acid: 83g (0.5 mol)
Xylene: 2.54g
Silicone oligomer: 307454 g from Dow Corning, 303750 g from Dow Corning, KR9218120g from Xinyue, KR 21730 g from Xinyue
Crosslinking catalyst: tetrabutyl titanate 1.27g
Organic solvent: 52.4g of propylene glycol methyl ether acetate, 100g of butanol, 50g of dipropylene glycol methyl ether acetate and 40g of dipropylene glycol butyl ether acetate
b) The synthesis steps are as follows:
mixing trihydric alcohol, dihydric alcohol and isophthalic acid uniformly, heating to 80 ℃, and adding silanol and xylene; heating at 220 deg.C for 2.5h, heating to 230 deg.C, and heating for 2.5 h; cooling to 90 ℃, and adding propylene glycol methyl ether acetate, butanol, organic silicon oligomer and a crosslinking catalyst; heating to 110 deg.C for 3 h; cooling to 70 deg.C, and adding dipropylene glycol methyl ether acetate and dipropylene glycol butyl ether acetate.
c) Modified polyester resin Properties
Combination of properties of modified polyester resins
2) Coating material
a) Composition of
Modified polyester resin: 120g of the modified polyester resin prepared in the step 1;
filling: 10g of silicon carbide; 10g of silicon dioxide; 5g of titanium dioxide;
organosilicon auxiliary agent: CoatOSil 35004 g; silicone oil
/350cst 4g；
High boiling point solvent: 10g of 3-Ethyl Ether Propionate (EEP); dibasic ester mixture (DBE) 10 g.
b) Preparation process
The pigment, the filler, the modified polyester resin, the organic silicon assistant and the high-boiling-point solvent are uniformly mixed and added into a grinding machine to be ground to the required particle size, and the modified polyester resin is obtained.
c) Performance of
Performance index of paint
Example 5
1) Preparation of hydroxy silicone oil
a) Formulation of
Octamethylcyclotetrasiloxane: 200g
Tetramethyl ammonium hydroxide: 0.02g
Water: 3.6g
N, N' -Dimethylformamide (DMF): 50g
b) Preparation process
Adding octamethylcyclotetrasiloxane, tetramethylammonium hydroxide and DMF (dimethyl formamide) in a reactor provided with a condenser tube, a thermometer, a dropping funnel and a stirrer in sequence according to a ratio, starting stirring and heating up, heating up to 80 ℃, keeping the temperature constant, dropwise adding distilled water under stirring, after dropwise adding, reacting at constant temperature for 8 hours, heating up to 150 ℃ for reacting for 1 hour, cooling to 80 ℃, starting reduced pressure distillation, controlling the pressure to be 0.06MPa, evaporating off small molecules generated in the reaction process, and cooling to room temperature to obtain 176g of hydroxyl silicone oil.
c) Performance of
The weight average molecular weight of the hydroxyl silicone oil is detected by adopting gel permeation chromatography, and the result is 1103; the hydroxyl content of the hydroxyl silicone oil was measured by an acetic anhydride method, and was 2.9 w%.
2) Preparation of modified polyester resins
a) Consists of the following components:
trihydric alcohol: trimethylolpropane 134g (1.0 mol);
a dihydric alcohol: neopentyl glycol 5.2g (0.05 mol);
silanol: 9.38g of hydroxy silicone oil prepared in step 1
Isophthalic acid: 132.8g (0.8 mol)
Xylene: 8.04g
Silicone oligomer: 23328.2 g of Dow Corning company, 24970 g of Dow Corning company, Z-610840g of Dow Corning company, IC 83650 g of Wake company, KR 21320 g of Xinyue company, KR 921830 g of Xinyue company, KR 21760 g of Xinyue company, etc,
Crosslinking catalyst: tetrabutyl titanate 4.02g
Organic solvent: propylene glycol methyl ether acetate 201g, butanol 154g
b) The synthesis steps are as follows:
mixing trihydric alcohol, dihydric alcohol and isophthalic acid uniformly, heating to 80 ℃, and adding silanol and xylene; heating at 190 deg.C for 3h, heating to 220 deg.C, and heating for 2 h; cooling to 90 ℃, and adding propylene glycol methyl ether acetate, organic silicon oligomer and a crosslinking catalyst; heating to 115 deg.C for 3 h; the temperature is reduced to 90 ℃, and finally butanol is added.
c) Modified polyester resin Properties
Combination of properties of modified polyester resins
2) Coating material
a) Composition of
Modified polyester resin: 140g of modified polyester resin prepared in the step 1;
filling: 44g of silicon dioxide;
pigment: 20g of carbon black;
organosilicon auxiliary agent: CoatOSil 35004 g; 76502 g CoatOSil;
high boiling point solvent: 2g of methyl isoamyl ketone (MIAK); isobutyl isobutyrate 4 g.
b) Preparation process
The pigment, the filler, the modified polyester resin, the organic silicon assistant and the high-boiling-point solvent are uniformly mixed and added into a grinding machine to be ground to the required particle size, and the modified polyester resin is obtained.
c) Performance of
Performance index of paint
Example 6
1) Preparation of hydroxy silicone oil
a) Formulation of
Octamethylcyclotetrasiloxane: 200g
Tetramethyl ammonium hydroxide: 0.02g
Water: 4g
N, N' -Dimethylformamide (DMF): 60g of
b) Preparation process
Adding octamethylcyclotetrasiloxane, tetramethylammonium hydroxide and DMF (dimethyl formamide) in a reactor provided with a condenser tube, a thermometer, a dropping funnel and a stirrer in sequence according to a ratio, starting stirring and heating up, heating to 85 ℃, keeping the temperature constant, dropwise adding distilled water under stirring, after dropwise adding, reacting at constant temperature for 10h, heating to 150 ℃ for reacting for 1h, cooling to 80 ℃, starting reduced pressure distillation, controlling the pressure to be 0.06MPa, evaporating off small molecules generated in the reaction process, and cooling to room temperature to obtain 143g of hydroxyl silicone oil.
c) Performance of
The weight average molecular weight of the hydroxyl silicone oil is detected by adopting a gel permeation chromatography, and the result is 997; the hydroxyl content of the hydroxyl silicone oil was measured by an acetic anhydride method, and the result was 3.02 w%.
2) Preparation of modified polyester resins
a) Consists of the following components:
trihydric alcohol: 120g (1.0 mol) of trimethylolethane;
a dihydric alcohol: neopentyl glycol 8.32g (0.08 mol);
silanol: 3.6g of the hydroxy silicone oil prepared in step 1, W-62m 6g of Wake corporation
Isophthalic acid: 99.6g (0.6 mol)
Xylene: 4.02g
Silicone oligomer: CRS 15027 g, CRS 21130 g, CRS 21240 g, CRS 21460 g, and CRS 21670 g
Crosslinking catalyst: tetrabutyl titanate 2.71g
Organic solvent: 187g of propylene glycol methyl ether acetate, 50g of dipropylene glycol methyl ether acetate and 50g of dipropylene glycol butyl ether acetate
b) Preparation process
Mixing trihydric alcohol, dihydric alcohol and isophthalic acid uniformly, heating to 70 ℃, and adding silanol and xylene; heating at 210 deg.C for 1h, heating to 220 deg.C, and heating for 3 h; cooling to 90 ℃, and adding propylene glycol methyl ether acetate, organic silicon oligomer and a crosslinking catalyst; heating to 120 deg.C for 3 h; finally adding dipropylene glycol methyl ether acetate and dipropylene glycol butyl ether acetate.
c) Modified polyester resin Properties
Combination of properties of modified polyester resins
2) Coating material
a) Composition of
Modified polyester resin: 120g of the modified polyester resin prepared in the step 1;
filling: 5g of silicon dioxide; 25g of titanium dioxide;
organosilicon auxiliary agent: CoatOSil 35004 g; CoatOSil 75102 g; silicone oil
/350cst4g；
High boiling point solvent: dibasic ester mixture (DBE) 12 g.
b) Preparation process
Uniformly mixing the filler, the modified polyester resin, the organic silicon assistant and the high-boiling-point solvent, and adding the mixture into a grinding machine to grind the mixture to the required particle size to obtain the modified polyester resin.
c) Performance of
Performance index of paint
Example 7
1) Preparation of hydroxy silicone oil
a) Formulation of
Octamethylcyclotetrasiloxane: 200g
Tetramethyl ammonium hydroxide: 0.02g
Water: 4.8g
N, N' -Dimethylformamide (DMF): 60g of
b) Preparation process
Adding octamethylcyclotetrasiloxane, tetramethylammonium hydroxide and DMF (dimethyl formamide) in a reactor provided with a condenser tube, a thermometer, a dropping funnel and a stirrer in sequence according to a ratio, starting stirring and heating up, heating up to 80 ℃, keeping the temperature constant, dropwise adding distilled water under stirring, after dropwise adding, reacting at constant temperature for 10h, heating up to 150 ℃ for reacting for 1h, cooling to 80 ℃, starting reduced pressure distillation, controlling the pressure to be 0.06MPa, evaporating off small molecules generated in the reaction process, and cooling to room temperature to obtain 166g of hydroxyl silicone oil.
c) Performance of
The weight average molecular weight of the hydroxyl silicone oil is detected by adopting a gel permeation chromatography, and the result is 806; the hydroxyl content of the hydroxyl silicone oil was measured by an acetic anhydride method, and the result was 4.6 w%.
2) Preparation of modified polyester resins
a) Consists of the following components:
trihydric alcohol: trimethylolpropane 134g (1.0 mol);
a dihydric alcohol: neopentyl glycol 2.08g (0.02 mol);
silanol: 10.72g of Hydroxysilicone oil prepared in step 1
Isophthalic acid: 116.2g (0.7 mol)
Xylene: 12g of
Silicone oligomer: CRS 150168 g, IC 836100 g of Wacker
Crosslinking catalyst: tetrabutyl titanate 5.36g
Organic solvent: propylene glycol methyl ether acetate 187g butanol 65g
b) The synthesis steps are as follows:
mixing trihydric alcohol, dihydric alcohol and isophthalic acid uniformly, heating to 75 ℃, and adding silanol and xylene; heating at 180 deg.C for 1h, heating to 240 deg.C, and heating for 1 h; cooling to 90 ℃, and adding propylene glycol methyl ether acetate, organic silicon oligomer and a crosslinking catalyst; heating to 110 ℃, and heating for 2 h; finally butanol is added.
c) Modified polyester resin Properties
Combination of properties of modified polyester resins
2) Coating material
a) Composition of
Modified polyester resin: 110g of the modified polyester resin prepared in the step 1;
filling: 15g of silicon dioxide; 5g of titanium dioxide; silicon carbide (10 g)
High boiling point solvent: dibasic ester mixture (DBE) 40 g; isobutyl isobutyrate 20 g.
b) Preparation process
Uniformly mixing the filler, the modified polyester resin, the organic silicon assistant and the high-boiling-point solvent, and adding the mixture into a grinding machine to grind the mixture to the required particle size to obtain the modified polyester resin.
c) Performance of
Performance index of paint
Example 8
1) Preparation of hydroxy silicone oil
a) Formulation of
Octamethylcyclotetrasiloxane: 200g
Tetramethyl ammonium hydroxide: 0.02g
Water: 5.8g
N, N' -Dimethylformamide (DMF): 60g of
b) Preparation process
Adding octamethylcyclotetrasiloxane, tetramethylammonium hydroxide and DMF (dimethyl formamide) in a reactor provided with a condenser tube, a thermometer, a dropping funnel and a stirrer in sequence according to a ratio, starting stirring and heating up, heating up to 85 ℃, keeping the temperature constant, dropwise adding distilled water under stirring, after dropwise adding, reacting at constant temperature for 8 hours, heating up to 150 ℃, reacting for 1 hour, cooling to 80 ℃, starting reduced pressure distillation, controlling the pressure to be 0.06MPa, evaporating off small molecules generated in the reaction process, and cooling to room temperature to obtain the hydroxyl silicone oil.
c) Performance of
The weight average molecular weight of the hydroxyl silicone oil is detected by adopting gel permeation chromatography, and the result is 516; the hydroxyl content of the hydroxyl silicone oil is measured by an acetic anhydride method, and the result is 8.03 w%.
2) Preparation of Silicone oligomers
a) Composition of
Monomethyltriethoxysilane: 44.5g (0.25 mol)
Dimethyl diethoxysilane: 50.3g (0.34 mol)
Mono-phenyltriethoxysilane: 98.4g (0.41 mol),
b) preparation process
Siloxane and 7.0mmol of hydrochloric acid are sequentially added into a reactor provided with a condenser tube, a thermometer, a dropping funnel and a stirrer according to the proportion, stirring and heating are started, the temperature is kept constant after the temperature is raised to 70 ℃, 43.1g of distilled water is dropwise added under stirring, after the dropwise addition is finished, constant temperature reaction is carried out for 3 hours, reduced pressure distillation is started, the pressure is controlled to be 0.06MPa, small molecules generated in the reaction process are evaporated, the temperature is cooled to room temperature, the solid content is adjusted to 80%, and 230g of organic silicon oligomer is obtained.
c) Performance of
The weight average molecular weight of the organic silicon oligomer is detected by adopting a gel permeation chromatography, and the result is 1986; the hydroxyl content of the organic silicon oligomer is determined by an acetic anhydride method, and the result is 15 w%; the ethoxy content of the organic silicon oligomer is determined by an acetyl perchlorate method, and the result is 3 w%; R/Si = 1.34; ph/Me = 0.44.
2) Preparation of modified polyester resins
a) Consists of the following components:
trihydric alcohol: trimethylolpropane 134g (1.0 mol);
a dihydric alcohol: neopentyl glycol 10.4g (0.1 mol);
silanol: step 1 preparation of hydroxyl silicone oil 34g
Isophthalic acid: 107.9g (0.65 mol)
Xylene: 6.7g
Silicone oligomer: step 1 preparation of Silicone oligomer 228g
Crosslinking catalyst: tetrabutyl titanate 2.5g
Organic solvent: propylene glycol methyl ether acetate 280g
b) The synthesis steps are as follows:
mixing trihydric alcohol, dihydric alcohol and silanol uniformly, heating to 90 ℃, and adding isophthalic acid and xylene; heating at 180 deg.C for 1h, heating to 240 deg.C, and heating for 1 h; cooling to 90 ℃, and adding an organic solvent, an organic silicon oligomer and a crosslinking catalyst which are 1.0 time of the weight of the trihydric alcohol; heating to 110 ℃, and heating for 2 h; and finally adding the residual organic solvent.
c) Modified polyester resin Properties
Combination of properties of modified polyester resins
3) Coating material
a) Composition of
Modified polyester resin: 150g of modified polyester resin prepared in the step 2;
filling: 15g of silicon dioxide; 5g of titanium dioxide;
organosilicon auxiliary agent: CoatOSil 35005 g; silicone oil
/350cst 5g；
High boiling point solvent: dibasic ester mixture (DBE) 10 g.
b) Preparation process
Uniformly mixing the filler, the modified polyester resin, the organic silicon assistant and the high-boiling-point solvent, and adding the mixture into a grinding machine to grind the mixture to the required particle size to obtain the modified polyester resin.
c) Performance of
Performance index of paint
Example 9
1) Silicone oligomers
a) Composition of
Monomethyltriethoxysilane: 69.1g (0.36 mol)
Dimethyl diethoxysilane: 34.0g (0.21 mol)
Mono-phenyltriethoxysilane: 109.24g (0.43 mol),
b) preparation process
Siloxane and 5.5mmol of hydrochloric acid are sequentially added into a reactor provided with a condenser tube, a thermometer, a dropping funnel and a stirrer according to the proportion, stirring and heating are started, the temperature is kept constant after the temperature is raised to 70 ℃, 42.7g of distilled water is dropwise added under stirring, after the dropwise addition is finished, constant temperature reaction is carried out for 3 hours, reduced pressure distillation is started, the pressure is controlled to be 0.06MPa, small molecules generated in the reaction process are evaporated, the temperature is cooled to room temperature, the solid content is adjusted to be 60%, and 322g of organic silicon oligomer is obtained.
c) Performance of
The weight average molecular weight of the silicone oligomer is detected by gel permeation chromatography, and the result is 1808; the hydroxyl content of the organic silicon oligomer is determined by an acetic anhydride method, and the result is 20 w%; the ethoxy content of the organic silicon oligomer is determined by an acetyl perchlorate method, and the result is 2.5 w%; R/Si = 1.21; ph/Me = 0.55.
2) Preparation of modified polyester resins
a) Consists of the following components:
trihydric alcohol: trimethylolpropane 134g (1.0 mol);
a dihydric alcohol: neopentyl glycol 3.12g (0.03 mol);
silanol: w-62m 4g from Wake, KR220L 5.24.24 g from Xinyue
Isophthalic acid: 116.2g (0.7 mol)
Xylene: 5.3g
Silicone oligomer: xinyue silicone resin KR 150120 g, Z-610841 g from Dow Corning, IC 83680 g from Wake
Crosslinking catalyst: tetrabutyl titanate 5.28g
Organic solvent: propylene glycol methyl ether acetate 158.4g, propylene glycol butyl ether acetate 80g
b) The synthesis steps are as follows:
mixing trihydric alcohol, dihydric alcohol and isophthalic acid uniformly, heating to 80 ℃, and adding silanol and xylene; heating at 190 deg.C for 1.5h, heating to 230 deg.C, and heating for 2 h; cooling to 90 ℃, and adding propylene glycol methyl ether acetate, organic silicon oligomer and a crosslinking catalyst; heating to 120 ℃, and heating for 2 h; cooling to 90 deg.C, and adding propylene glycol butyl ether acetate.
c) Modified polyester resin Properties
Combination of properties of modified polyester resins
3) Coating material
a) Composition of
Modified polyester resin: 150g of modified polyester resin prepared in the step 2;
filling: 40g of titanium dioxide;
organic auxiliary agents: CoatOSil 75108 g;
high boiling to solvent: dibasic ester mixture (DBE) 2 g.
b) Preparation process
Uniformly mixing the filler, the modified polyester resin, the organic silicon assistant and the high-boiling-point solvent, and adding the mixture into a grinding machine to grind the mixture to the required particle size to obtain the modified polyester resin.
c) Performance of
Performance index of paint
Example 10
1) Preparation of Polyylsilicone oils
a) Formulation of
Octamethylcyclotetrasiloxane: 200g
Tetramethyl ammonium hydroxide: 0.02g
Water: 12g of
N, N' -Dimethylformamide (DMF): 60g of
b) Preparation process
Adding octamethylcyclotetrasiloxane, tetramethylammonium hydroxide and DMF (dimethyl formamide) in a reactor provided with a condenser tube, a thermometer, a dropping funnel and a stirrer in sequence according to a ratio, starting stirring and heating up, heating up to 90 ℃, keeping the temperature constant, dropwise adding distilled water under stirring, after dropwise adding, reacting at constant temperature for 9.5 hours, heating up to 150 ℃, reacting for 1 hour, cooling to 80 ℃, starting reduced pressure distillation, controlling the pressure at 0.06MPa, evaporating off small molecules generated in the reaction process, cooling to room temperature, and adjusting the solid content to 60% to obtain 157g of hydroxyl silicone oil.
c) Performance of
The weight average molecular weight of the hydroxyl silicone oil is detected by adopting a gel permeation chromatography, and the result is 301; the hydroxyl group content of the hydroxyl silicone oil was measured by an acetic anhydride method, and found to be 10.1 w%.
2) Silicone oligomers
a) Composition of
Monomethyltrimethoxysilane: 42.0g (0.28 mol)
Dimethyl dimethoxy silane: 18.7g (0.14 mol)
Mono-phenyltrimethoxysilane: 123.0g (0.58 mol),
b) preparation process
Siloxane and 4.5mmol of hydrochloric acid are sequentially added into a reactor provided with a condenser tube, a thermometer, a dropping funnel and a stirrer according to the proportion, stirring and heating are started, the temperature is kept constant after the temperature is raised to 60 ℃, 31.7g of distilled water is dropwise added under stirring, after the dropwise addition is finished, constant temperature reaction is carried out for 3 hours, reduced pressure distillation is started, the pressure is controlled to be 0.06MPa, small molecules generated in the reaction process are evaporated, the temperature is cooled to room temperature, the solid content is adjusted to be 60%, and 290g of organic silicon oligomer is obtained.
c) Performance of
The weight average molecular weight of the organic silicon oligomer is detected by adopting gel permeation chromatography, and the result is 802; the hydroxyl content of the organic silicon oligomer is measured by an acetic anhydride method, and the result is 10.6 w%; the methoxy content of the organosilicon oligomer is determined by an acetyl perchlorate method, and the result is 7.4 w%; R/Si = 1.14; ph/Me = 1.04.
3) Preparation of modified polyester resins
a) Consists of the following components:
trihydric alcohol: trimethylolpropane 134g (1.0 mol);
a dihydric alcohol: neopentyl glycol 2.08g (0.02 mol);
silanol: 3.8g of the Hydroxysilicol prepared in step 1, W-62m 4g from Wacker, 4g of heptaphenylsilsesquioxane trisilicol
Isophthalic acid: 149.4g (0.9 mol)
Xylene: 13.2g
Silicone oligomer: KR 212110 g from shin-Etsu corporation, step 2, and 120g of a silicone intermediate
Crosslinking catalyst: tetrabutyl titanate 3.9g
Organic solvent: propylene glycol methyl ether acetate 280g
b) The synthesis steps are as follows:
mixing trihydric alcohol, dihydric alcohol and isophthalic acid uniformly, heating to 90 ℃, and adding silanol and xylene; heating at 190 deg.C for 3h, heating to 230 deg.C, and heating for 3 h; cooling to 90 ℃, and adding propylene glycol methyl ether acetate 1.0 time of the weight of the trihydric alcohol, the organic silicon oligomer and the crosslinking catalyst; heating to 115 deg.C for 3 h; cooling to 80 deg.C, and adding the rest propylene glycol methyl ether acetate.
c) Modified polyester resin Properties
Combination of properties of modified polyester resins
2) Coating material
a) Composition of
Modified polyester resin: 120g of the modified polyester resin prepared in the step 1;
filling: 20g of titanium dioxide; 30g of silicon dioxide;
pigment: 10g of iron oxide red;
organosilicon auxiliary agent: CoatOSil 7510: 2g of the total weight of the mixture;
high boiling point solvent: dibasic ester mixture (DBE): 18 g.
b) Preparation process
The pigment, the filler, the modified polyester resin, the organic silicon assistant and the high-boiling-point solvent are uniformly mixed and added into a grinding machine to be ground to the required particle size, and the modified polyester resin is obtained.
c) Performance of
Performance index of paint
Comparative examples
Reference 1 preparation of comparative coating (Ma Yi et al, preparation of amino-terminated silicone oil modified polyester resin, electroplating and coating, 2011, stage 02)
Reference 2 preparation of comparative coating 2 (Lihuagong et al, Synthesis of Silicone-modified hydroxyl-terminated polyesters, synthetic resins and plastics, 2012, 29 (2): 20-23)
Comparative coating 3 reference (CN 102504265A) formulation
Performance index of paint
Heat resistance was measured according to method 3; flexibility is detected according to GB/T1731-1993; the cold-heat alternation is detected according to GB 9278.
a degradation temperature in thermogravimetric analysis.
The polyester in the comparative coating 1 is prepared by reacting 1, 6-adipic acid, 1, 3-propanediol and hydroxyl silicone oil, the flexibility of the modified polyester reaches 4mm, the cold-hot alternation reaches 35 times, but only a small amount of silicone oil is used for modification in the process of preparing resin, and an organic silicon intermediate is not used for modifying the polyester, so that the heat resistance of the prepared modified polyester is 280 ℃, the boiling resistance is 1.2 hours, and the heat resistance and the boiling resistance are far inferior to those of the coating disclosed by the invention.
The resin in the comparative coating 2 is a polyhydroxy polyester resin modified by an organosilicon intermediate, and the resin has good heat resistance, and the heat resistance temperature of the resin reaches 350 ℃. However, the polyhydroxy polyester adopted is not modified by silanol, so that the flexibility is poor, and is only 6mm, and the cold-heat resistance is 19 times.
The resin in the comparative coating 3 is obtained by modifying polyester resin by adopting an organic silicon intermediate, and the resin has good heat resistance, the heat resistance temperature of the resin reaches 365 ℃, and the boiling resistance of the resin reaches 5.1 h. However, only polyols such as neopentyl glycol, trimethylolpropane and 1, 3-propanediol are used in the preparation of the polyester, resulting in poor flexibility of only 6 mm.
The coating prepared by the resin has the heat resistance of 480 ℃ and the flexibility of 3 mm. The heat resistance and flexibility of the paint are far better than those of a comparative paint 1, a comparative paint 2 and a comparative paint 3.
Claims (4)
1. A process for the preparation of a modified polyester resin, which process comprises the steps of:
uniformly mixing trihydric alcohol, dihydric alcohol with the molar weight of 0.02-0.1 time of trihydric alcohol and isophthalic acid with the molar weight of 0.5-1.0 time of trihydric alcohol, heating to 70-90 ℃, and adding silanol with the weight of 0.05-0.1 time of trihydric alcohol and xylene with the weight of 0.02-0.1 time of trihydric alcohol; heating at 180-210 ℃ for 1-3 h, heating to 220-240 ℃ for 1-3 h; then, cooling to 90 ℃, adding an organic solvent which is 1.0-1.5 times of the weight of the trihydric alcohol, an organic silicon oligomer which is 1.5-2.5 times of the weight of the trihydric alcohol and a crosslinking catalyst which is 1-5% of the weight of the trihydric alcohol, heating to 110-120 ℃, and heating for 2-3 hours; finally, cooling to 90 ℃, and adding an organic solvent to adjust the solid content to 60-70%; wherein,
the trihydric alcohol is one or two of trimethylolethane and trimethylolpropane;
the dihydric alcohol is one or more than two of neopentyl glycol, 2-methyl 1, 3-propylene glycol and 1, 6-hexanediol;
the silanol is one or more than two of heptapoly (cyclopentyl) silsesquioxane trisilicol, heptaphenyl silsesquioxane trisilicol, heptaisobutyl silsesquioxane trisilicol and hydroxyl silicone oil; wherein the weight average molecular weight of the hydroxyl silicone oil is 300-1000, and the hydroxyl silicone oil contains 3-10 w% of hydroxyl;
the crosslinking catalyst is tetrabutyl titanate or tetraisobutyl titanate;
the organic solvent is one or more than two of butanol, propylene glycol methyl ether acetate, dipropylene glycol methyl ether acetate and dipropylene glycol butyl ether acetate;
the weight average molecular weight of the organic silicon oligomer is 800-2000, and the organic silicon oligomer contains 3-20 w% of hydroxyl and 2.5-15 w% of methoxyl or ethoxyl.
2. The method for preparing modified polyester resin according to claim 1, wherein said silanol is hydroxy silicone oil.
3. The method for preparing a modified polyester resin according to claim 2, wherein the hydroxy silicone oil has a weight average molecular weight of 500 to 800 and contains 3 to 8w% of hydroxyl groups.
4. A coating material comprising 60 to 80% by weight of the modified polyester resin obtained by the method of claim 1,2 or 3, 10 to 20% by weight of a high-temperature resistant filler and 5 to 20% by weight of a high-boiling point solvent; wherein, the high boiling point solvent is one or more than two of dibasic acid ester mixture, ethylene glycol ethyl ether acetate, diethylene glycol butyl ether acetate, isobutyl isobutyrate, 3-ethyl propionate and methyl isoamyl ketone, and the high temperature resistant filler is one or more than two of titanium dioxide, silicon dioxide and silicon carbide.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105713488A (en) * | 2016-03-24 | 2016-06-29 | 湖州新奥克化工有限公司 | Super-abrasion-resistant unsaturated polyester resin coating and preparation method thereof |
| CN106008943A (en) * | 2016-06-28 | 2016-10-12 | 新丰县汇丰化工有限公司 | Organosilicone-acrylic acid-aturated polyester hybrid resin preparing process |
| EP3083754A4 (en) * | 2013-12-17 | 2017-07-05 | Valspar Sourcing, Inc. | Silicone-modified polyester coating |
| CN110117355A (en) * | 2019-06-12 | 2019-08-13 | 黄山嘉恒科技有限公司 | The excellent TGIC polyester resin for powder coating of resistance to neutral salt spray and preparation method |
| CN119320592A (en) * | 2024-11-12 | 2025-01-17 | 云南云岭涂料有限公司 | High-weather-resistance self-cleaning nano silicon coating and preparation process thereof |
| CN120118321A (en) * | 2025-05-12 | 2025-06-10 | 衡阳山泰化工有限公司 | High-temperature-resistant polyester resin and preparation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102504271A (en) * | 2011-11-03 | 2012-06-20 | 杭州吉华高分子材料有限公司 | Method for preparing hyperbranched polyester modified organic silicon resin |
-
2012
- 2012-11-27 CN CN201210492771.8A patent/CN102977351B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102504271A (en) * | 2011-11-03 | 2012-06-20 | 杭州吉华高分子材料有限公司 | Method for preparing hyperbranched polyester modified organic silicon resin |
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| EP3083754A4 (en) * | 2013-12-17 | 2017-07-05 | Valspar Sourcing, Inc. | Silicone-modified polyester coating |
| US11104762B2 (en) | 2013-12-17 | 2021-08-31 | Valspar Sourcing, Inc. | Silicone-modified polyester coating |
| CN105713488A (en) * | 2016-03-24 | 2016-06-29 | 湖州新奥克化工有限公司 | Super-abrasion-resistant unsaturated polyester resin coating and preparation method thereof |
| CN106008943A (en) * | 2016-06-28 | 2016-10-12 | 新丰县汇丰化工有限公司 | Organosilicone-acrylic acid-aturated polyester hybrid resin preparing process |
| CN110117355A (en) * | 2019-06-12 | 2019-08-13 | 黄山嘉恒科技有限公司 | The excellent TGIC polyester resin for powder coating of resistance to neutral salt spray and preparation method |
| CN110117355B (en) * | 2019-06-12 | 2021-06-15 | 黄山嘉恒科技有限公司 | Polyester resin with excellent neutral salt spray resistance for TG IC powder coating and preparation method thereof |
| CN119320592A (en) * | 2024-11-12 | 2025-01-17 | 云南云岭涂料有限公司 | High-weather-resistance self-cleaning nano silicon coating and preparation process thereof |
| CN120118321A (en) * | 2025-05-12 | 2025-06-10 | 衡阳山泰化工有限公司 | High-temperature-resistant polyester resin and preparation method thereof |
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