CN112552731A - Alkali-proof putty for external wall - Google Patents
Alkali-proof putty for external wall Download PDFInfo
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- CN112552731A CN112552731A CN202011553114.0A CN202011553114A CN112552731A CN 112552731 A CN112552731 A CN 112552731A CN 202011553114 A CN202011553114 A CN 202011553114A CN 112552731 A CN112552731 A CN 112552731A
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- parts
- alkali
- putty
- resistant
- lignin fiber
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- 239000003513 alkali Substances 0.000 claims abstract description 35
- 238000002360 preparation method Methods 0.000 claims abstract description 31
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 28
- 239000012750 alkali resistant agent Substances 0.000 claims abstract description 27
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 23
- 239000010703 silicon Substances 0.000 claims abstract description 23
- 238000002156 mixing Methods 0.000 claims abstract description 19
- 239000000843 powder Substances 0.000 claims abstract description 19
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000007788 liquid Substances 0.000 claims abstract description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 14
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 11
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 11
- 239000004568 cement Substances 0.000 claims abstract description 10
- 229920002472 Starch Polymers 0.000 claims abstract description 8
- 239000004816 latex Substances 0.000 claims abstract description 8
- 229920000126 latex Polymers 0.000 claims abstract description 8
- 239000008107 starch Substances 0.000 claims abstract description 8
- 235000019698 starch Nutrition 0.000 claims abstract description 8
- 239000007864 aqueous solution Substances 0.000 claims abstract description 7
- 239000011256 inorganic filler Substances 0.000 claims abstract description 7
- 229910003475 inorganic filler Inorganic materials 0.000 claims abstract description 7
- 239000001913 cellulose Substances 0.000 claims abstract description 6
- 229920002678 cellulose Polymers 0.000 claims abstract description 6
- 238000007873 sieving Methods 0.000 claims abstract description 6
- 238000001694 spray drying Methods 0.000 claims abstract description 6
- 239000000835 fiber Substances 0.000 claims description 40
- 229920005610 lignin Polymers 0.000 claims description 39
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 23
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 20
- 238000010438 heat treatment Methods 0.000 claims description 19
- 238000003756 stirring Methods 0.000 claims description 16
- 238000005406 washing Methods 0.000 claims description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 10
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 10
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 10
- 239000002253 acid Substances 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 8
- IMQLKJBTEOYOSI-GPIVLXJGSA-N Inositol-hexakisphosphate Chemical compound OP(O)(=O)O[C@H]1[C@H](OP(O)(O)=O)[C@@H](OP(O)(O)=O)[C@H](OP(O)(O)=O)[C@H](OP(O)(O)=O)[C@@H]1OP(O)(O)=O IMQLKJBTEOYOSI-GPIVLXJGSA-N 0.000 claims description 7
- IMQLKJBTEOYOSI-UHFFFAOYSA-N Phytic acid Natural products OP(O)(=O)OC1C(OP(O)(O)=O)C(OP(O)(O)=O)C(OP(O)(O)=O)C(OP(O)(O)=O)C1OP(O)(O)=O IMQLKJBTEOYOSI-UHFFFAOYSA-N 0.000 claims description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 7
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 235000002949 phytic acid Nutrition 0.000 claims description 7
- 229940068041 phytic acid Drugs 0.000 claims description 7
- 239000000467 phytic acid Substances 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 7
- 239000000243 solution Substances 0.000 claims description 6
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims description 5
- BOTDANWDWHJENH-UHFFFAOYSA-N Tetraethyl orthosilicate Chemical compound CCO[Si](OCC)(OCC)OCC BOTDANWDWHJENH-UHFFFAOYSA-N 0.000 claims description 5
- 238000010306 acid treatment Methods 0.000 claims description 5
- FPCJKVGGYOAWIZ-UHFFFAOYSA-N butan-1-ol;titanium Chemical compound [Ti].CCCCO.CCCCO.CCCCO.CCCCO FPCJKVGGYOAWIZ-UHFFFAOYSA-N 0.000 claims description 5
- 238000006243 chemical reaction Methods 0.000 claims description 5
- HPNMFZURTQLUMO-UHFFFAOYSA-N diethylamine Chemical compound CCNCC HPNMFZURTQLUMO-UHFFFAOYSA-N 0.000 claims description 5
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 claims description 5
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 claims description 5
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 claims description 5
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical group OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 claims description 5
- 239000011259 mixed solution Substances 0.000 claims description 5
- 229910052757 nitrogen Inorganic materials 0.000 claims description 5
- 230000008569 process Effects 0.000 claims description 5
- 238000002791 soaking Methods 0.000 claims description 5
- CPUDPFPXCZDNGI-UHFFFAOYSA-N triethoxy(methyl)silane Chemical compound CCO[Si](C)(OCC)OCC CPUDPFPXCZDNGI-UHFFFAOYSA-N 0.000 claims description 5
- ZNOCGWVLWPVKAO-UHFFFAOYSA-N trimethoxy(phenyl)silane Chemical compound CO[Si](OC)(OC)C1=CC=CC=C1 ZNOCGWVLWPVKAO-UHFFFAOYSA-N 0.000 claims description 5
- 239000008096 xylene Substances 0.000 claims description 5
- 230000004048 modification Effects 0.000 claims description 4
- 238000012986 modification Methods 0.000 claims description 4
- 238000007580 dry-mixing Methods 0.000 abstract description 6
- 238000010276 construction Methods 0.000 abstract description 5
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 9
- -1 polysiloxane Polymers 0.000 description 9
- 230000009286 beneficial effect Effects 0.000 description 8
- 239000004205 dimethyl polysiloxane Substances 0.000 description 8
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 8
- 238000012360 testing method Methods 0.000 description 8
- 239000002585 base Substances 0.000 description 7
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 6
- 239000007921 spray Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 229920001296 polysiloxane Polymers 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 230000002209 hydrophobic effect Effects 0.000 description 4
- 230000002159 abnormal effect Effects 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000945 filler Substances 0.000 description 3
- 238000001914 filtration Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000003973 paint Substances 0.000 description 3
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 2
- 239000011162 core material Substances 0.000 description 2
- 239000000839 emulsion Substances 0.000 description 2
- 229910017053 inorganic salt Inorganic materials 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 239000011398 Portland cement Substances 0.000 description 1
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 230000003712 anti-aging effect Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 239000012745 toughening agent Substances 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/34—Filling pastes
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Sealing Material Composition (AREA)
Abstract
The application relates to the field of putty powder, and specifically discloses an alkali-proof putty for an external wall, which comprises the following components in parts by weight: 20-40 parts of cement; 60-80 parts of heavy calcium carbonate; 0.3-0.6 part of cellulose; 0.3-0.6 part of starch ether; 0.1-0.3 part of latex powder; 0.3-0.8 part of an alkali resistant agent; the preparation process of the alkali-resistant agent is as follows: according to the parts by weight, firstly, 40-50 parts of organic silicon, 10-15 parts of inorganic filler and 300 parts of 200-plus-one polyvinyl alcohol aqueous solution are mixed and stirred for 20-30min at the rotating speed of 600-plus-one 1000r/min to obtain feed liquid; and then carrying out spray drying treatment, crushing and sieving on the feed liquid to obtain the alkali-resistant agent. The alkali-resistant putty is suitable for a dry mixing system, is uniformly stirred after being added with mixing water during construction application, and can be directly brushed.
Description
Technical Field
The application relates to the field of putty powder, more specifically says, it relates to an outer wall alkali-proof putty.
Background
The exterior wall putty is a matched material in the process of decorating exterior walls of building coatings, and is used as a base treatment material. The putty powder mainly comprises three main parts, namely base materials, fillers and auxiliaries, wherein the common base materials comprise inorganic materials such as cement, lime, gypsum and the like, the common fillers comprise quartz powder, light calcium carbonate, talcum powder and the like, and the common auxiliaries comprise a thickening agent, a mildew inhibitor, an anti-aging agent and the like.
The dry-mixed putty powder is prepared by dry-mixing and molding all the components into powder or granules, conveying the powder to a construction site in a bag or bulk mode, and adding water and mixing the powder and the powder to construct and apply.
The wall surface is alkali-resistant, so that the wall body needs to be alkali-resistant and is coated with alkali-resistant putty in a matching way. The alkali-resistant putty is characterized in that the alkali-resistant putty contains an alkali-resistant agent in raw materials, and most of the alkali-resistant agent is in a liquid state, such as acrylic emulsion, organic silicon emulsion and the like, and is not suitable for a dry mixing system.
Disclosure of Invention
In order to make the putty powder alkali-resistant and be suitable for dry mixing system, the application provides an alkali-proof putty for an external wall.
The application provides an alkali-proof putty for external walls, which adopts the following technical scheme:
the alkali-proof putty for the outer wall comprises the following components in parts by weight:
20-40 parts of cement;
60-80 parts of heavy calcium carbonate;
0.3-0.6 part of cellulose;
0.3-0.6 part of starch ether;
0.1-0.3 part of latex powder;
0.3-0.8 part of an alkali resistant agent;
the preparation process of the alkali-resistant agent is as follows: according to the parts by weight, firstly, 40-50 parts of organic silicon, 10-15 parts of inorganic filler and 300 parts of 200-plus-one polyvinyl alcohol aqueous solution are mixed and stirred for 20-30min at the rotating speed of 600-plus-one 1000r/min to obtain feed liquid; and then carrying out spray drying treatment, crushing and sieving on the feed liquid to obtain the alkali-resistant agent.
By adopting the technical scheme, cement is used as a cementing material; heavy calcium carbonate as filler; the cellulose has excellent water retention performance, can improve the cohesiveness and operability of the putty, and overcomes the problems of easy shelling and hollowing of the putty; the starch ether thickens the putty, so that the surface of the mortar becomes smooth, the mortar is easy to coat, and the decorative effect is good; the latex powder is used for improving the adhesive property and the cohesion, so that the strength of the putty layer is improved.
The alkali-resistant agent wraps the organic silicon through a polyvinyl alcohol aqueous solution, and then the organic silicon is adsorbed by an inorganic filler and then is spray-dried into powder. When the alkali-resistant agent contacts water, the polyvinyl alcohol is dissolved in the water, the organic silicon is released and adsorbed on the surface of cement particles to form an organic silicon hydrophobic film with an outward alkyl group, so that the putty layer has good hydrophobicity and can prevent the migration of alkali.
The alkali-resistant putty is suitable for a dry mixing system, is uniformly stirred after being added with mixing water during construction application, and can be directly brushed.
Optionally, the preparation process of the organic silicon is as follows: firstly, uniformly mixing 15-20 parts of phenyltrimethoxysilane, 20-30 parts of isopropanol and 5-8 parts of diethylamine, heating to 85-95 ℃, introducing nitrogen for protection, then adding 0.04-0.08 part of tetra-n-butoxy titanium, stirring for reaction for 4-6h, and finally removing low-boiling-point substances in vacuum to obtain the organic silicon.
By adopting the technical scheme, the organic silicon has strong permeability, can react with inorganic salt in the base layer to generate a new silicate high molecular compound, and is beneficial to improving the alkali resistance of the putty layer; and the organic high molecular compound can increase the flexibility of the putty layer.
Optionally, the inorganic filler is nano diatomite.
By adopting the technical scheme, the nano diatomite has a unique microporous structure, a large specific surface area and a large amount of active hydroxyl on the surface. Therefore, the nano diatomite has high bearing rate, high organosilicon content in the polyvinyl alcohol wall film and good alkali resistance of the putty layer.
Optionally, 4-6 parts of a tackifier is further added in the preparation process of the alkali-resistant agent, and the preparation process of the tackifier is as follows: uniformly mixing 1.5-2 parts of KH560, 2.2-2.8 parts of phytic acid and 40-45 parts of ethanol, heating to 70-75 ℃, continuously stirring for 1-2 hours, adding a mixed solution of 60-80 parts of methyltriethoxysilane, 8-10 parts of tetraethoxysilane and 20-25 parts of ethanol, continuously heating to 80-85 ℃, and continuously stirring for 4-5 hours to obtain the tackifier.
By adopting the technical scheme, the tackifier is formed by co-hydrolyzing and polycondensing silanized phytic acid and silane monomers to obtain the polysiloxane grafted with phytic acid macromolecules. The tackifier and the organic silicon are wrapped in the polyvinyl alcohol wall film together, and when the tackifier is released, the tackifier is beneficial to improving the bonding performance of the hydrophobic film and the base layer and improving the alkali resistance of the putty layer.
Optionally, the putty further comprises 1.5-2 parts of lignin fiber.
By adopting the technical scheme, the lignin fiber is organic fiber obtained by chemical treatment of natural wood, has stable chemical properties and good toughness, and is beneficial to improving the flexibility of the putty layer.
Optionally, the lignin fiber is modified, and the modification process is as follows:
uniformly mixing 8-10 parts of lignin fiber, 3-4 parts of maleic anhydride and 50-60 parts of xylene, heating to 140-.
By adopting the technical scheme, the lignin fiber is modified and grafted with high-activity maleic anhydride, and then is hydrophobically combined with organic silicon, so that the dispersion is more uniform, and the defect of high water absorption of the lignin fiber is overcome.
Optionally, before the lignin fiber is modified, an acid treatment step is further performed, wherein the specific process of the acid treatment step is as follows: soaking the lignin fiber in hydrochloric acid solution for 3-5min, taking out, washing with water, and drying to obtain acid-treated lignin fiber.
By adopting the technical scheme, the grafting amount of the maleic anhydride is increased after the lignin fiber is subjected to acid treatment, and the modification effect is further improved.
Optionally, the cellulose is hydroxypropyl methylcellulose.
In summary, the present application has the following beneficial effects:
1. the alkali-resistant putty is suitable for a dry mixing system, and can be directly brushed after uniformly stirring after adding mixing water during construction application;
2. the alkali-resistant agent with a shell-core structure is preferably adopted, and after the polyvinyl alcohol wall film solution is placed in water, the organic silicon core material is released to form an organic silicon hydrophobic film, so that the putty layer has good hydrophobicity and can block the migration of alkali;
3. the modified lignin fiber is preferably used as a toughening agent, so that the flexibility of the putty layer is improved, and the alkali resistance is not influenced.
Detailed Description
The present application is further described in detail with reference to the following examples, which are specifically illustrated by the following: the following examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer, and the starting materials used in the following examples are available from ordinary commercial sources unless otherwise specified.
The embodiment of the application adopts the following raw materials:
the cement is 42.5-grade ordinary portland cement; heavy calcium carbonate with the grain size of 400 meshes; starch ether model number FP6, purchased from elvan, the netherlands; latex powder, model RD-531W, available from Henan Jiarun New materials Co., Ltd; polydimethylsiloxane, model PMX-200, purchased from Dow, USA; the particle size of the nano calcium carbonate is 50 nm.
Examples of preparation of Silicone
Preparation example 1:
the preparation process of the organic silicon comprises the following steps: firstly, uniformly mixing 15 parts of phenyltrimethoxysilane, 20 parts of isopropanol and 5 parts of diethylamine, heating to 85 ℃, introducing nitrogen for protection, then adding 0.04 part of tetra-n-butoxy titanium, stirring for reaction for 4 hours, and finally removing low-boiling-point substances in vacuum at the temperature of 75 ℃ and the vacuum degree of 120kPa to obtain the organic silicon.
Preparation example 2:
the preparation process of the organic silicon comprises the following steps: firstly, uniformly mixing 20 parts of phenyltrimethoxysilane, 30 parts of isopropanol and 8 parts of diethylamine, heating to 95 ℃, introducing nitrogen for protection, then adding 0.08 part of tetra-n-butoxy titanium, stirring for reaction for 6 hours, and finally removing low-boiling-point substances in vacuum at the temperature of 75 ℃ and the vacuum degree of 120kPa to obtain the organic silicon.
Preparation example 3:
the preparation process of the organic silicon comprises the following steps: firstly, uniformly mixing 18 parts of phenyltrimethoxysilane, 25 parts of isopropanol and 6 parts of diethylamine, heating to 90 ℃, introducing nitrogen for protection, then adding 0.06 part of tetra-n-butoxy titanium, stirring for reaction for 5 hours, and finally removing low-boiling-point substances in vacuum at the temperature of 75 ℃ and the vacuum degree of 120kPa to obtain the organic silicon.
Example 1:
the alkali-proof putty for outer wall is prepared with cement 20 weight portions, heavy calcium carbonate 60 weight portions, hydroxypropyl methyl cellulose 0.3 weight portions, starch ether 0.3 weight portions, latex powder 0.1 weight portions and alkali resisting agent 0.3 weight portions and through mixing.
The preparation process of the alkali-resistant agent is as follows: according to parts by weight, firstly, 40 parts of polydimethylsiloxane, 10 parts of nano calcium carbonate and 200 parts of polyvinyl alcohol aqueous solution with the concentration of 10wt% are mixed, and the mixture is stirred for 20min at the rotating speed of 600r/min to obtain feed liquid; and then carrying out spray drying treatment on the feed liquid by a spray dryer, wherein the air inlet temperature is 140 ℃, the outlet temperature is 50 ℃, the rotating speed of a spray head is 15000r/min, the feeding speed is 3L/h, and finally crushing and sieving by a 500-mesh sieve to obtain the alkali-resistant agent.
Example 2:
the alkali-proof putty for outer wall is prepared with cement 40 weight portions, heavy calcium carbonate 80 weight portions, hydroxypropyl methyl cellulose 0.6 weight portions, starch ether 0.6 weight portions, latex powder 0.3 weight portions and alkali resisting agent 0.8 weight portions.
The preparation process of the alkali-resistant agent is as follows: according to parts by weight, firstly, 50 parts of polydimethylsiloxane, 15 parts of nano calcium carbonate and 300 parts of polyvinyl alcohol aqueous solution with the concentration of 10wt% are mixed, and stirred for 30min at the rotating speed of 1000r/min to obtain feed liquid; and then carrying out spray drying treatment on the feed liquid by a spray dryer, wherein the air inlet temperature is 140 ℃, the outlet temperature is 50 ℃, the rotating speed of a spray head is 15000r/min, the feeding speed is 3L/h, and finally crushing and sieving by a 500-mesh sieve to obtain the alkali-resistant agent.
Example 3:
the alkali-proof putty for outer wall is prepared with cement 30 weight portions, heavy calcium carbonate 70 weight portions, hydroxypropyl methyl cellulose 0.4 weight portions, starch ether 0.5 weight portions, latex powder 0.2 weight portions and alkali resisting agent 0.5 weight portions.
The preparation process of the alkali-resistant agent is as follows: according to parts by weight, firstly, 45 parts of polydimethylsiloxane, 12 parts of nano calcium carbonate and 250 parts of polyvinyl alcohol aqueous solution with the concentration of 10wt% are mixed, and the mixture is stirred for 25min at the rotating speed of 800r/min to obtain feed liquid; and then carrying out spray drying treatment on the feed liquid by a spray dryer, wherein the air inlet temperature is 140 ℃, the outlet temperature is 50 ℃, the rotating speed of a spray head is 15000r/min, the feeding speed is 3L/h, and finally crushing and sieving by a 500-mesh sieve to obtain the alkali-resistant agent.
Example 4:
the difference from example 3 is that the silicone obtained in preparation example 1 was replaced by polydimethylsiloxane and the like.
Example 5:
the difference from example 3 is that the silicone obtained in preparation example 2 was replaced by polydimethylsiloxane and the like.
Example 6:
the difference from example 3 is that the silicone obtained in preparation example 3 was replaced by polydimethylsiloxane and the like.
Example 7:
the difference from the embodiment 6 is that the nano calcium carbonate and the like are replaced by 50nm nano diatomite in mass.
Example 8;
the difference from the example 7 is that 4 parts of tackifier is also added in the feed liquid in the preparation process of the alkali-resistant agent, and the preparation process of the tackifier is as follows: uniformly mixing 1.5 parts of KH560, 2.2 parts of phytic acid and 40 parts of 30wt% ethanol, heating to 70 ℃, continuously stirring for 1h, adding a mixed solution of 60 parts of methyltriethoxysilane, 8 parts of tetraethoxysilane and 20 parts of 30wt% ethanol, continuously heating to 80 ℃, and continuously stirring for 4h to obtain the tackifier.
Example 9;
the difference from the example 7 is that 6 parts of tackifier is also added into the feed liquid in the preparation process of the alkali-resistant agent, and the preparation process of the tackifier is as follows: uniformly mixing 2 parts of KH560, 2.8 parts of phytic acid and 45 parts of 30wt% ethanol, heating to 75 ℃, continuously stirring for 2 hours, adding a mixed solution of 80 parts of methyltriethoxysilane, 10 parts of tetraethoxysilane and 25 parts of 30wt% ethanol, continuously heating to 85 ℃, and continuously stirring for 5 hours to obtain the tackifier.
Example 10;
the difference from the example 7 is that 5 parts of tackifier is also added into the feed liquid in the preparation process of the alkali-resistant agent, and the preparation process of the tackifier is as follows: uniformly mixing 1.8 parts of KH560, 2.5 parts of phytic acid and 42 parts of 30wt% ethanol, heating to 72 ℃, continuously stirring for 1.5h, adding a mixed solution of 70 parts of methyltriethoxysilane, 9 parts of ethyl orthosilicate and 22 parts of 30wt% ethanol, continuously heating to 83 ℃, and continuously stirring for 4.5h to obtain the tackifier.
Example 11:
the difference from the embodiment 10 is that 2 parts of modified lignin fiber is also added into the exterior wall alkali-proof putty. The preparation process of the modified lignin fiber comprises the following steps: soaking the lignin fiber in 10wt% hydrochloric acid solution for 3min, taking out, washing with water, and drying to obtain acid-treated lignin fiber; and then 8 parts of acid-treated lignin fiber, 3 parts of maleic anhydride and 50 parts of xylene are uniformly mixed, the temperature is raised to 140 ℃, the mixture lasts for 2 hours, and finally, the modified lignin fiber is obtained through filtration, toluene washing, acetone washing and drying.
Example 12:
the difference from the embodiment 10 is that 1.5 parts of modified lignin fiber is also added into the exterior wall alkali-proof putty. The preparation process of the modified lignin fiber comprises the following steps: soaking the lignin fiber in 10wt% hydrochloric acid solution for 5min, taking out, washing with water, and drying to obtain acid-treated lignin fiber; and then uniformly mixing 10 parts of acid-treated lignin fiber, 4 parts of maleic anhydride and 60 parts of xylene, heating to 150 ℃, continuing for 3 hours, and finally filtering, washing with toluene, washing with acetone and drying to obtain the modified lignin fiber.
Example 13:
the difference from the embodiment 10 is that 1.8 parts of modified lignin fiber is also added into the exterior wall alkali-proof putty. The preparation process of the modified lignin fiber comprises the following steps: soaking the lignin fiber in 10wt% hydrochloric acid solution for 4min, taking out, washing with water, and drying to obtain acid-treated lignin fiber; and then uniformly mixing 9 parts of acid-treated lignin fiber, 3.5 parts of maleic anhydride and 55 parts of xylene, heating to 145 ℃, continuing for 2.5 hours, and finally filtering, washing with toluene, washing with acetone and drying to obtain the modified lignin fiber.
Example 14:
the difference from example 13 is that lignin fiber and the like are used in place of the modified lignin fiber.
Example 15:
the difference from example 13 is that the lignin fibers were not acid treated.
Comparative example 1:
the difference from the embodiment 3 is that the alkali-resistant putty for the exterior wall does not contain an alkali-resistant agent.
And (3) performance testing:
the putty of the examples 1-15 and the comparative example 1 is mixed with water, and the water addition amount accounts for 45 percent of the total mass of the putty, so that a tested product is prepared.
And (2) performing alkali resistance test on a tested product according to the regulation in GB/T9265 plus 2009 determination of alkali resistance of the coating of the building coating, observing whether abnormal phenomena such as color change, air bubbles, peeling, pulverization, softening and the like appear on the surface of the putty layer every 5 hours, evaluating the grade of the abnormal phenomena according to GB/T1766 plus 2008 rating method of ageing of the coating of the colored paint and the varnish, wherein the grade is 0-5, the grade 0 is unchanged, and recording the time when the grade of the abnormal phenomena reaches the grade 2, wherein the result is shown in Table 1.
The test products were tested according to the provisions of GB/T1731-1993 paint film flexibility test, and the diameter of the smallest shaft rod which does not cause damage to the paint film after bending was obtained, and the smaller the diameter, the better the flexibility, and the results are shown in Table 1.
TABLE 1 exterior wall putty Performance test results recording sheet
| Alkali resistance/h | Flexibility/mm | |
| Example 1 | 85 | 5 |
| Example 2 | 85 | 5 |
| Example 3 | 90 | 5 |
| Example 4 | 105 | 2 |
| Example 5 | 105 | 2 |
| Example 6 | 110 | 2 |
| Example 7 | 120 | 2 |
| Example 8 | 135 | 2 |
| Example 9 | 130 | 2 |
| Example 10 | 135 | 2 |
| Example 11 | 135 | 1 |
| Example 12 | 135 | 1 |
| Example 13 | 135 | 1 |
| Example 14 | 120 | 1 |
| Example 15 | 125 | 1 |
| Comparative example 1 | 20 | 5 |
As can be seen from table 1:
1. the comparison of the test results of the examples 1-3 and the comparative example 1 can obtain that the addition of the alkali-resistant agent is beneficial to obviously improving the alkali-resistant performance of the putty and meeting the construction requirement;
2. compared with the common polydimethylsiloxane, the organic silicon prepared by the application has strong permeability, can react with inorganic salt in the base layer to generate a new silicate high molecular compound, is beneficial to improving the alkali resistance of the putty layer, and can increase the flexibility of the putty layer by the organic high molecular compound;
3. the test results of the embodiment 6 and the embodiment 7 can be compared, and the nano diatomite is preferably used as the inorganic filler, so that the alkali resistance of the putty layer is further improved;
4. the comparison between the test results of example 7 and examples 8-10 shows that the addition of the tackifier is beneficial to improving the bonding performance of the hydrophobic film and the base layer and improving the alkali resistance of the putty layer;
5. comparing the test results of example 10 and examples 11-15, the addition of modified lignin fibers is beneficial to improve the flexibility of the putty layer, but does not affect the alkali resistance.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (8)
1. The alkali-resistant putty for the outer wall is characterized by comprising the following components in parts by weight:
20-40 parts of cement;
60-80 parts of heavy calcium carbonate;
0.3-0.6 part of cellulose;
0.3-0.6 part of starch ether;
0.1-0.3 part of latex powder;
0.3-0.8 part of an alkali resistant agent;
the preparation process of the alkali-resistant agent is as follows: according to the parts by weight, firstly, 40-50 parts of organic silicon, 10-15 parts of inorganic filler and 300 parts of 200-plus-one polyvinyl alcohol aqueous solution are mixed and stirred for 20-30min at the rotating speed of 600-plus-one 1000r/min to obtain feed liquid; and then carrying out spray drying treatment, crushing and sieving on the feed liquid to obtain the alkali-resistant agent.
2. The alkali-resistant putty for exterior walls as claimed in claim 1, wherein: the preparation process of the organic silicon comprises the following steps: firstly, uniformly mixing 15-20 parts of phenyltrimethoxysilane, 20-30 parts of isopropanol and 5-8 parts of diethylamine, heating to 85-95 ℃, introducing nitrogen for protection, then adding 0.04-0.08 part of tetra-n-butoxy titanium, stirring for reaction for 4-6h, and finally removing low-boiling-point substances in vacuum to obtain the organic silicon.
3. The alkali-resistant putty for exterior walls as claimed in claim 1, wherein: the inorganic filler is nano diatomite.
4. The alkali-resistant putty for exterior walls as claimed in claim 3, wherein: 4-6 parts of a tackifier is also added in the preparation process of the alkali-resistant agent, and the preparation process of the tackifier is as follows: uniformly mixing 1.5-2 parts of KH560, 2.2-2.8 parts of phytic acid and 40-45 parts of ethanol, heating to 70-75 ℃, continuously stirring for 1-2 hours, adding a mixed solution of 60-80 parts of methyltriethoxysilane, 8-10 parts of tetraethoxysilane and 20-25 parts of ethanol, continuously heating to 80-85 ℃, and continuously stirring for 4-5 hours to obtain the tackifier.
5. The alkali-resistant putty for exterior walls as claimed in claim 1, wherein: the putty also comprises 1.5-2 parts of lignin fiber.
6. The alkali-resistant putty for exterior walls as claimed in claim 5, wherein: the lignin fiber is modified, and the modification process is as follows:
uniformly mixing 8-10 parts of lignin fiber, 3-4 parts of maleic anhydride and 50-60 parts of xylene, heating to 140-.
7. The alkali-resistant putty for exterior walls as claimed in claim 6, wherein: the method is characterized in that an acid treatment step is also carried out before the lignin fiber is modified, and the specific process of the acid treatment step is as follows: soaking the lignin fiber in hydrochloric acid solution for 3-5min, taking out, washing with water, and drying to obtain acid-treated lignin fiber.
8. The alkali-resistant putty for exterior walls as claimed in claim 1, wherein: the cellulose is hydroxypropyl methyl cellulose.
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| CN116144212B (en) * | 2022-12-29 | 2023-11-28 | 天津德普威涂料有限公司 | Exterior wall putty free of alkali-resistant primer coating and preparation method and application thereof |
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Application publication date: 20210326 |