CN107868262A - A kind of polymer SiO2The preparation method of nucleocapsid composite milk rubber powder - Google Patents
A kind of polymer SiO2The preparation method of nucleocapsid composite milk rubber powder Download PDFInfo
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- CN107868262A CN107868262A CN201711274687.8A CN201711274687A CN107868262A CN 107868262 A CN107868262 A CN 107868262A CN 201711274687 A CN201711274687 A CN 201711274687A CN 107868262 A CN107868262 A CN 107868262A
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- 239000000843 powder Substances 0.000 title claims abstract description 29
- 238000002360 preparation method Methods 0.000 title claims abstract description 16
- 229920001971 elastomer Polymers 0.000 title claims abstract description 14
- 239000002131 composite material Substances 0.000 title claims abstract description 12
- 239000008267 milk Substances 0.000 title claims abstract description 12
- 210000004080 milk Anatomy 0.000 title claims abstract description 12
- 235000013336 milk Nutrition 0.000 title claims abstract description 12
- 229920000642 polymer Polymers 0.000 title abstract description 3
- 239000000839 emulsion Substances 0.000 claims abstract description 21
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000002245 particle Substances 0.000 claims abstract description 18
- 239000004816 latex Substances 0.000 claims abstract description 16
- 229920000126 latex Polymers 0.000 claims abstract description 16
- 229910052681 coesite Inorganic materials 0.000 claims abstract description 10
- 229910052906 cristobalite Inorganic materials 0.000 claims abstract description 10
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 10
- 229910052682 stishovite Inorganic materials 0.000 claims abstract description 10
- 229910052905 tridymite Inorganic materials 0.000 claims abstract description 10
- 239000006185 dispersion Substances 0.000 claims abstract description 6
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 5
- 230000006641 stabilisation Effects 0.000 claims abstract description 5
- 238000011105 stabilization Methods 0.000 claims abstract description 5
- 239000000126 substance Substances 0.000 claims abstract description 5
- 238000001694 spray drying Methods 0.000 claims abstract description 4
- 229920001909 styrene-acrylic polymer Polymers 0.000 claims description 13
- 238000006243 chemical reaction Methods 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 239000007864 aqueous solution Substances 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 7
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 6
- 239000012153 distilled water Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 238000010792 warming Methods 0.000 claims description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 5
- 239000003995 emulsifying agent Substances 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 4
- 239000005995 Aluminium silicate Substances 0.000 claims description 3
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims description 3
- CNCOEDDPFOAUMB-UHFFFAOYSA-N N-Methylolacrylamide Chemical class OCNC(=O)C=C CNCOEDDPFOAUMB-UHFFFAOYSA-N 0.000 claims description 3
- RCEAADKTGXTDOA-UHFFFAOYSA-N OS(O)(=O)=O.CCCCCCCCCCCC[Na] Chemical compound OS(O)(=O)=O.CCCCCCCCCCCC[Na] RCEAADKTGXTDOA-UHFFFAOYSA-N 0.000 claims description 3
- 235000012211 aluminium silicate Nutrition 0.000 claims description 3
- 239000000872 buffer Substances 0.000 claims description 3
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims description 3
- 239000006260 foam Substances 0.000 claims description 3
- 238000009396 hybridization Methods 0.000 claims description 3
- 239000003999 initiator Substances 0.000 claims description 3
- 230000000977 initiatory effect Effects 0.000 claims description 3
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims description 3
- 238000003760 magnetic stirring Methods 0.000 claims description 3
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 claims description 3
- 230000004044 response Effects 0.000 claims description 3
- RMAQACBXLXPBSY-UHFFFAOYSA-N silicic acid Chemical class O[Si](O)(O)O RMAQACBXLXPBSY-UHFFFAOYSA-N 0.000 claims description 3
- UIIMBOGNXHQVGW-UHFFFAOYSA-M sodium bicarbonate Substances [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 claims description 3
- 229910000030 sodium bicarbonate Inorganic materials 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 230000002459 sustained effect Effects 0.000 claims description 3
- YUYCVXFAYWRXLS-UHFFFAOYSA-N trimethoxysilane Chemical compound CO[SiH](OC)OC YUYCVXFAYWRXLS-UHFFFAOYSA-N 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 claims description 2
- 150000003961 organosilicon compounds Chemical class 0.000 claims description 2
- 238000010025 steaming Methods 0.000 claims description 2
- 239000008346 aqueous phase Substances 0.000 abstract description 3
- 230000016615 flocculation Effects 0.000 abstract description 3
- 238000005189 flocculation Methods 0.000 abstract description 3
- 238000000034 method Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
- 230000002776 aggregation Effects 0.000 abstract description 2
- 238000004220 aggregation Methods 0.000 abstract description 2
- 125000000217 alkyl group Chemical group 0.000 abstract description 2
- 230000004927 fusion Effects 0.000 abstract description 2
- 230000001681 protective effect Effects 0.000 abstract description 2
- 230000010148 water-pollination Effects 0.000 abstract description 2
- 239000002105 nanoparticle Substances 0.000 abstract 1
- 239000004570 mortar (masonry) Substances 0.000 description 4
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- -1 polyoxyethylene Polymers 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- VAJVDSVGBWFCLW-UHFFFAOYSA-N 3-Phenyl-1-propanol Chemical compound OCCCC1=CC=CC=C1 VAJVDSVGBWFCLW-UHFFFAOYSA-N 0.000 description 1
- DYUQAZSOFZSPHD-UHFFFAOYSA-N Phenylpropyl alcohol Natural products CCC(O)C1=CC=CC=C1 DYUQAZSOFZSPHD-UHFFFAOYSA-N 0.000 description 1
- 229920003171 Poly (ethylene oxide) Polymers 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 210000000481 breast Anatomy 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- IJKVHSBPTUYDLN-UHFFFAOYSA-N dihydroxy(oxo)silane Chemical compound O[Si](O)=O IJKVHSBPTUYDLN-UHFFFAOYSA-N 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- ARYZCSRUUPFYMY-UHFFFAOYSA-N methoxysilane Chemical compound CO[SiH3] ARYZCSRUUPFYMY-UHFFFAOYSA-N 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000005543 nano-size silicon particle Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 239000003381 stabilizer Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/12—Powdering or granulating
- C08J3/122—Pulverisation by spraying
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F212/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring
- C08F212/02—Monomers containing only one unsaturated aliphatic radical
- C08F212/04—Monomers containing only one unsaturated aliphatic radical containing one ring
- C08F212/06—Hydrocarbons
- C08F212/08—Styrene
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F261/00—Macromolecular compounds obtained by polymerising monomers on to polymers of oxygen-containing monomers as defined in group C08F16/00
- C08F261/02—Macromolecular compounds obtained by polymerising monomers on to polymers of oxygen-containing monomers as defined in group C08F16/00 on to polymers of unsaturated alcohols
- C08F261/04—Macromolecular compounds obtained by polymerising monomers on to polymers of oxygen-containing monomers as defined in group C08F16/00 on to polymers of unsaturated alcohols on to polymers of vinyl alcohol
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L25/00—Compositions of, homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Compositions of derivatives of such polymers
- C08L25/02—Homopolymers or copolymers of hydrocarbons
- C08L25/04—Homopolymers or copolymers of styrene
- C08L25/08—Copolymers of styrene
- C08L25/14—Copolymers of styrene with unsaturated esters
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L33/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides or nitriles thereof; Compositions of derivatives of such polymers
- C08L33/24—Homopolymers or copolymers of amides or imides
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
- C08F220/1804—C4-(meth)acrylate, e.g. butyl (meth)acrylate, isobutyl (meth)acrylate or tert-butyl (meth)acrylate
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2325/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring; Derivatives of such polymers
- C08J2325/02—Homopolymers or copolymers of hydrocarbons
- C08J2325/04—Homopolymers or copolymers of styrene
- C08J2325/08—Copolymers of styrene
- C08J2325/14—Copolymers of styrene with unsaturated esters
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- C08J2333/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Derivatives of such polymers
- C08J2333/24—Homopolymers or copolymers of amides or imides
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Abstract
The invention discloses a kind of polymer SiO2The preparation method of nucleocapsid composite milk rubber powder, the present invention in hydroaropic substance PVA molecular moieties grafting be fixed on the surface of emulsion particle, it firmly can be connected on latex particle, and can is soluble in the aqueous phase, and is favorably improved the resistance to overturning of emulsion system；Addition organosilicon is modifying agent, and the alkyl in organosilicon is to nano-particle SiO in Ludox2Steric hindrance protective effect is provided, avoids SiO2Particle aggregation or flocculation, improve SiO in Ludox2The dispersion stabilization of particle, after spray-dried afterwards, SiO2Uniform particle is adhered on the surface of emulsion particle, improves the hydrophily of latex powder, effectively prevents fusion of the emulsion particle in spray-drying process, improves the redisperse ability of latex powder.
Description
Technical field
The invention belongs to building material technical field, and in particular to a kind of polymer-SiO2Nucleocapsid composite milk rubber powder
Preparation method.
Background technology
, can in terms of redispersable latex powder product is widely used in the polymer modification of the hydraulic materials such as cement, gypsum
The addition of redisperse latex powder so that single packing premixes dry powder and mortar and the preparation of mortar bonding agent is possibly realized, and is stored up saving
It is easy to quality control and the site operation of product while transporting cost.Main function of the redispersable latex powder in mortar material
It is the barrier performance and bend resistance intensity for improving induration, and improves the caking property of mortar in the case where mitigating tack coat quality
Can, thus be widely used in the products such as rigidity water-proofing material, gravity flow self-leveling floor, flexible putty and ceramic tile bond.
Ludox is a kind of inexpensive colloidal solution using water as the inorganic poly- metasilicic acid of the nanoscale macromolecule of decentralized medium,
It is the thermodynamic unstable system for carrying out aid dispersion by electric charge or some other stabilizer, because environmental condition is sent out in recombination process
Changing may cause flocculation, caking or gel.
The content of the invention
The invention provides a kind of polymer-SiO2The preparation method of nucleocapsid composite milk rubber powder, improves latex powder again
Dispersive property.
The present invention is achieved by the following technical solutions：
A kind of polymer-SiO2The preparation method of nucleocapsid composite milk rubber powder, Ludox is modified using organosilicon, improved
SiO in Ludox2The dispersion stabilization of particle, while the synthetic reaction that hydroaropic substance PVA participates in styrene-acrylic emulsion is added, afterwards
Styrene acrylic emulsion-silica sol compound material is spray-dried, obtains the compound redispersable latex powder of nucleocapsid.
Comprise the following steps that：
（1）Weigh 1-4 parts emulsifying agent to add in conical flask, dissolved with 21-43 parts distilled water, add 9-18 part Ludox, and
PH value is adjusted under magnetic stirring to 5-7, after being warming up to 50-60 DEG C, 0.3-0.7 part organosilicons is added dropwise, are incubated after being added dropwise
Stirring reaction 6-10 hours, obtain organic-silicon hybridization Ludox；
（2）Prepare the PVA aqueous solution：
Using 8-15 part PVA are slowly added into 28-35 DEG C of warm water, 15-30 minutes are stirred, after PVA is fully swelled, slowly will
Temperature is increased to 85-95 DEG C, and continues insulated and stirred 2-3 hours, is completely dissolved to PVA, then cools, stands overnight, and eliminates
Foam, preparation obtain the 20% PVA aqueous solution；
（3）Emulsion synthesizes：
First by 0.3-0.6 parts initiator potassium persulfate and 0.1-0.4 part acid-base buffer agents NaHCO3It is dissolved in the steaming of 160-240 parts
In distilled water, lead to nitrogen protection, then add step（2）The PVA aqueous solution, 8-16 parts methyl methacrylate, 26-43 part acrylic acid
Butyl ester, 28-41 parts styrene and 3-8 part N hydroxymethyl acrylamides are emulsified, and stirring is warming up to 75-85 DEG C of initiation reaction,
Sustained response 2-3 hours, obtain styrene-acrylic emulsion；
（4）By step（3）Styrene-acrylic emulsion and step（1）Modified silicasol mixes, ultrasonic disperse 10-25 minutes, and is adjusted with NaOH
PH to 8.5-9.5 is saved, 3-6 part kaolin is added, after being uniformly dispersed, is dried by spray dryer, obtains powdered again to divide
Dissipate rubber powder.
Wherein, the step（1）Emulsifying agent is lauryl sodium sulfate, neopelex or polyoxyethylene nonyl phenyl second
One or more in alkene ether.
Wherein, the step（1）Organosilicon refers to MTMS, trimethoxysilane, octyl group three
One kind in methoxy silane or KH-560.
Wherein, the step（4）The parameter of spray drying is arranged to：135-160 DEG C of inlet temperature, outlet temperature 75-85
DEG C, atomizing disk rotating speed 20000-26000rpm, feed rate 80g/min.
The present invention has the beneficial effect that：
The synthesis that hydroaropic substance PVA participates in styrene-acrylic emulsion is added in the present invention, PVA molecules grafting in part is fixed on styrene-acrylic emulsion
On the surface of particle, it firmly can be connected on latex particle, and can is soluble in the aqueous phase, the part PVA on emulsion particle, can
Serve as the effect of coalescents, contribute to latex intergranular interpenetrate and molten bonding, the PVA in aqueous phase can be with the silicon in Ludox
Hydroxyl reaction, it is favorably improved the resistance to overturning of emulsion system；Addition organosilicon is modifying agent, and the alkyl in organosilicon is to silicon
Nano-particle SiO in colloidal sol2Steric hindrance protective effect is provided, avoids SiO2Particle aggregation or flocculation, improve SiO in Ludox2
The dispersion stabilization of particle, after spray-dried afterwards, SiO2Uniform particle is adhered on the surface of emulsion particle, improves latex
The hydrophily of powder, so as to be advantageous to improve the redispersibility energy of latex powder, while the glass transition temperature of latex powder is improved, effectively
Fusion of the emulsion particle in spray-drying process is prevented, further improves the redisperse ability of latex powder.
Embodiment
A kind of polymer-SiO2The preparation method of nucleocapsid composite milk rubber powder, Ludox is modified using organosilicon,
Improve SiO in Ludox2The dispersion stabilization of particle, while the synthetic reaction that hydroaropic substance PVA participates in styrene-acrylic emulsion is added,
Styrene acrylic emulsion-silica sol compound material is spray-dried afterwards, obtains the compound redispersable latex powder of nucleocapsid.
Comprise the following steps that：
（1）Weigh 2 parts of lauryl sodium sulfate to add in conical flask, dissolved with 38 parts of distilled water, add 12 parts of Ludox, and
PH value is adjusted under magnetic stirring to 6, after being warming up to 55 DEG C, 0.4 part of MTMS is added dropwise, is incubated after being added dropwise
Stirring reaction 8 hours, obtains organic-silicon hybridization Ludox；
（2）Prepare the PVA aqueous solution：
Using 9 parts of PVA are slowly added into 30 DEG C of warm water, stir 20 minutes, after PVA is fully swelled, slowly raise temperature
To 90 DEG C, and continue insulated and stirred 2 hours, be completely dissolved to PVA, then cool, stand overnight, eliminate foam, preparation obtains
The 20% PVA aqueous solution；
（3）Emulsion synthesizes：
First by 0.4 part of initiator potassium persulfate and 0.3 part of acid-base buffer agent NaHCO3It is dissolved in 240 parts of distilled water, leads to nitrogen
Gas shielded, then add step（2）The PVA aqueous solution, 13 parts of methyl methacrylates, 34 parts of butyl acrylates, 34 parts of styrene
Emulsified with 6 parts of N hydroxymethyl acrylamides, stirring is warming up to 80 DEG C of initiation reactions, sustained response 3 hours, obtains phenylpropyl alcohol breast
Liquid；
（4）By step（3）Styrene-acrylic emulsion and step（1）Modified silicasol mixes, ultrasonic disperse 20 minutes, and adjusts pH with NaOH
To 9.0,4 parts of kaolin are added, after being uniformly dispersed, are dried by spray dryer, inlet temperature is 145 DEG C, and outlet temperature is
80 DEG C, atomizing disk rotating speed 23000rpm, feed rate 80g/min, obtain powdered re-dispersible glue powder.
Claims (5)
- A kind of 1. polymer-SiO2The preparation method of nucleocapsid composite milk rubber powder, it is characterised in that using organosilicon to Ludox It is modified, improves SiO in Ludox2The dispersion stabilization of particle, while add hydroaropic substance PVA and participate in styrene-acrylic emulsion Synthetic reaction, styrene acrylic emulsion-silica sol compound material is spray-dried afterwards, obtains the compound Redispersable latex of nucleocapsid Powder.
- A kind of 2. polymer-SiO according to claim 12The preparation method of nucleocapsid composite milk rubber powder, it is characterised in that Comprise the following steps that：（1）Weigh 1-4 parts emulsifying agent to add in conical flask, dissolved with 21-43 parts distilled water, add 9-18 part Ludox, and PH value is adjusted under magnetic stirring to 5-7, after being warming up to 50-60 DEG C, 0.3-0.7 part organosilicons is added dropwise, are incubated after being added dropwise Stirring reaction 6-10 hours, obtain organic-silicon hybridization Ludox；（2）Prepare the PVA aqueous solution：Using 8-15 part PVA are slowly added into 28-35 DEG C of warm water, 15-30 minutes are stirred, after PVA is fully swelled, slowly will Temperature is increased to 85-95 DEG C, and continues insulated and stirred 2-3 hours, is completely dissolved to PVA, then cools, stands overnight, and eliminates Foam, preparation obtain the 20% PVA aqueous solution；（3）Emulsion synthesizes：First by 0.3-0.6 parts initiator potassium persulfate and 0.1-0.4 part acid-base buffer agents NaHCO3It is dissolved in the steaming of 160-240 parts In distilled water, lead to nitrogen protection, then add step（2）The PVA aqueous solution, 8-16 parts methyl methacrylate, 26-43 part acrylic acid Butyl ester, 28-41 parts styrene and 3-8 part N hydroxymethyl acrylamides are emulsified, and stirring is warming up to 75-85 DEG C of initiation reaction, Sustained response 2-3 hours, obtain styrene-acrylic emulsion；（4）By step（3）Styrene-acrylic emulsion and step（1）Modified silicasol mixes, ultrasonic disperse 10-25 minutes, and is adjusted with NaOH PH to 8.5-9.5 is saved, 3-6 part kaolin is added, after being uniformly dispersed, is dried by spray dryer, obtains powdered again to divide Dissipate rubber powder.
- A kind of 3. polymer-SiO according to claim 22The preparation method of nucleocapsid composite milk rubber powder, it is characterised in that The step（1）Emulsifying agent is one kind in lauryl sodium sulfate, neopelex or NPE It is or several.
- A kind of 4. polymer-SiO according to claim 22The preparation method of nucleocapsid composite milk rubber powder, it is characterised in that The step（1）Organosilicon refer to MTMS, trimethoxysilane, octyl group trimethoxy silane or One kind in KH-560.
- A kind of 5. polymer-SiO according to claim 22The preparation method of nucleocapsid composite milk rubber powder, it is characterised in that The step（4）The parameter of spray drying is arranged to：135-160 DEG C of inlet temperature, 75-85 DEG C of outlet temperature, atomizing disk rotating speed 20000-26000rpm, feed rate 80g/min.
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