CN112143149A - Novel acrylic latex powder and preparation method thereof - Google Patents
Novel acrylic latex powder and preparation method thereof Download PDFInfo
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- CN112143149A CN112143149A CN202011049170.0A CN202011049170A CN112143149A CN 112143149 A CN112143149 A CN 112143149A CN 202011049170 A CN202011049170 A CN 202011049170A CN 112143149 A CN112143149 A CN 112143149A
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- latex powder
- polyvinyl alcohol
- emulsion
- acrylic latex
- vinyl acetate
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- 239000000843 powder Substances 0.000 title claims abstract description 71
- 239000004816 latex Substances 0.000 title claims abstract description 56
- 229920000126 latex Polymers 0.000 title claims abstract description 56
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 title claims abstract description 40
- 238000002360 preparation method Methods 0.000 title claims abstract description 14
- 239000000839 emulsion Substances 0.000 claims abstract description 79
- 239000004372 Polyvinyl alcohol Substances 0.000 claims abstract description 46
- 229920002451 polyvinyl alcohol Polymers 0.000 claims abstract description 46
- 229920000642 polymer Polymers 0.000 claims abstract description 33
- 239000002518 antifoaming agent Substances 0.000 claims abstract description 26
- 239000007864 aqueous solution Substances 0.000 claims abstract description 23
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 22
- 239000000203 mixture Substances 0.000 claims abstract description 20
- 229920001577 copolymer Polymers 0.000 claims abstract description 15
- HDERJYVLTPVNRI-UHFFFAOYSA-N ethene;ethenyl acetate Chemical group C=C.CC(=O)OC=C HDERJYVLTPVNRI-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229920001038 ethylene copolymer Polymers 0.000 claims abstract description 8
- 229920002126 Acrylic acid copolymer Polymers 0.000 claims abstract description 7
- CYKDLUMZOVATFT-UHFFFAOYSA-N ethenyl acetate;prop-2-enoic acid Chemical compound OC(=O)C=C.CC(=O)OC=C CYKDLUMZOVATFT-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000002994 raw material Substances 0.000 claims abstract description 7
- 238000002156 mixing Methods 0.000 claims description 34
- 238000003756 stirring Methods 0.000 claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 239000007787 solid Substances 0.000 claims description 16
- 239000007921 spray Substances 0.000 claims description 15
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims description 14
- 238000010438 heat treatment Methods 0.000 claims description 11
- 239000000243 solution Substances 0.000 claims description 9
- 229910000019 calcium carbonate Inorganic materials 0.000 claims description 7
- 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 claims description 7
- 238000001694 spray drying Methods 0.000 claims description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 230000008961 swelling Effects 0.000 claims description 6
- 239000005995 Aluminium silicate Substances 0.000 claims description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 3
- 238000006136 alcoholysis reaction Methods 0.000 claims description 3
- 235000012211 aluminium silicate Nutrition 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
- 239000002480 mineral oil Substances 0.000 claims description 3
- 235000010446 mineral oil Nutrition 0.000 claims description 3
- 238000006116 polymerization reaction Methods 0.000 claims description 3
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 235000012239 silicon dioxide Nutrition 0.000 claims description 3
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 claims description 2
- 239000004570 mortar (masonry) Substances 0.000 abstract description 11
- 239000000463 material Substances 0.000 abstract description 8
- 238000010276 construction Methods 0.000 abstract 1
- 238000001035 drying Methods 0.000 description 22
- 238000000034 method Methods 0.000 description 17
- 239000007788 liquid Substances 0.000 description 7
- 238000007664 blowing Methods 0.000 description 4
- 239000004568 cement Substances 0.000 description 4
- 229920002689 polyvinyl acetate Polymers 0.000 description 4
- 239000011118 polyvinyl acetate Substances 0.000 description 4
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 239000013530 defoamer Substances 0.000 description 3
- 239000000178 monomer Substances 0.000 description 3
- 239000000654 additive Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000000996 additive effect Effects 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002794 monomerizing effect Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000011782 vitamin Substances 0.000 description 1
- 229940088594 vitamin Drugs 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
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2331/00—Characterised by the use of 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 acyloxy radical of a saturated carboxylic acid, or carbonic acid, or of a haloformic acid
- C08J2331/02—Characterised by the use of omopolymers or copolymers of esters of monocarboxylic acids
- C08J2331/04—Homopolymers or copolymers of vinyl acetate
-
- 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
- C08J2429/00—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 alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Derivatives of such polymer
- C08J2429/02—Homopolymers or copolymers of unsaturated alcohols
- C08J2429/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
-
- 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
- C08J2431/00—Characterised by the use of 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 acyloxy radical of a saturated carboxylic acid, or carbonic acid, or of a haloformic acid
- C08J2431/02—Characterised by the use of omopolymers or copolymers of esters of monocarboxylic acids
- C08J2431/04—Homopolymers or copolymers of vinyl acetate
-
- 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
- C08J2483/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen, or carbon only; Derivatives of such polymers
- C08J2483/04—Polysiloxanes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Processes Of Treating Macromolecular Substances (AREA)
Abstract
The invention discloses a novel acrylic latex powder and a preparation method thereof, wherein the raw materials comprise modified polymer emulsion, polyvinyl alcohol aqueous solution, an anti-caking agent and a defoaming agent, wherein the modified polymer emulsion is an equal mass mixture of at least three of vinyl acetate-methyl acrylate copolymer emulsion, vinyl acetate-acrylic acid copolymer emulsion, vinyl acetate-ethylene copolymer emulsion, vinyl acetate-butyl acrylate copolymer emulsion, vinyl acetate-vinyl chloride copolymer emulsion and pure acrylic emulsion. The redispersible latex powder can improve the cohesion of the building mortar, improve the adhesion between the mortar and a base material and improve the construction property.
Description
Technical Field
The invention relates to the field of latex powder, and particularly relates to acrylic latex powder and a preparation method thereof
Technical Field
The redispersible emulsion powder is prepared by spray drying polymer emulsion, adding modified substances, and mixing, and can be redispersed in water to form emulsion. The redispersible latex powder is mainly used as a dry-mixed mortar additive, has the effects of improving the workability of mortar, improving the fluidity, improving the cohesion, increasing the bonding strength and the like, and is a novel environment-friendly material. At present, latex powder is added to improve the performances of mortar such as bonding, sag resistance and the like of ceramic tiles, external wall insulation, self-leveling, putty powder and the like.
The polymer emulsion for the redispersible emulsion powder is a polymer emulsion formed by adding one or two monomers into vinyl acetate as a monomer and polymerizing the monomers, and the polymer emulsion is mainly vinyl acetate-ethylene copolymer emulsion and vinyl acetate-ethylene versatate copolymer emulsion at present, and additives are added into the produced emulsion powder to improve caking resistance, redispersibility and the like. However, the vinyl acetate structure has a poor adhesion to insulation boards and cement substrates, and the original strength and water curing strength of the vinyl acetate structure are poor.
The acrylic emulsion has good water resistance and is widely used in the building material industry, but the process of directly drying and spraying the powder is immature, the percentage of the acrylic emulsion in the redispersible latex powder is small, the adhesion of the acrylic emulsion is poor, the adhesion strength of mortar is not improved enough, and the use of the acrylic emulsion is limited.
Disclosure of Invention
Based on the problems in the prior art, the invention provides a novel acrylic latex powder and a preparation method thereof, and aims to obtain a latex powder product with high cohesive strength and good adhesion.
In order to achieve the purpose, the invention adopts the following technical scheme:
a novel acrylic latex powder is characterized in that: the raw materials of the acrylic latex powder comprise modified polymer emulsion, polyvinyl alcohol aqueous solution, anti-caking agent and defoaming agent.
Further, the modified polymer emulsion is a mixture of at least three of vinyl acetate-methyl acrylate copolymer emulsion, vinyl acetate-acrylic acid copolymer emulsion, vinyl acetate-ethylene copolymer emulsion, vinyl acetate-butyl acrylate copolymer emulsion, vinyl acetate-vinyl chloride copolymer emulsion and pure acrylic acid emulsion in equal mass ratio. After mixing, the solid content of the obtained modified polymer emulsion is 45-65%, and the Brookfield viscosity is 500-6000 mpa.s.
Further, the polymerization degree of the polyvinyl alcohol is 400-2600, and the alcoholysis degree is 88-99%.
Further, the solid content of the polyvinyl alcohol aqueous solution is 8% -25%, and the mass ratio of the polyvinyl alcohol aqueous solution to the modified polymer emulsion is 1: 5-6.
Further: the addition amount of the anti-caking agent accounts for 0.5 to 5 percent of the total mass of the solids in the modified polymer emulsion and the polyvinyl alcohol aqueous solution; the addition amount of the defoaming agent is 0.1-1% of the total mass of the solids in the modified polymer emulsion and the polyvinyl alcohol aqueous solution.
Further, the anti-caking agent is a mixture of two of calcium carbonate, talcum powder, kaolin and silicon dioxide in a mass ratio of 1:1-2, and the defoaming agent is one or a mixture of two of an organic silicon defoaming agent and a mineral oil defoaming agent in a mass ratio of 1: 1.
The preparation method of the novel acrylic latex powder comprises the following steps:
step 1, adding a small amount of water into a dissolving kettle, then adding polyvinyl alcohol, and swelling for 30 min; introducing water vapor into the dissolving kettle and stirring to fully dissolve the polyvinyl alcohol; stirring for 1h to obtain a polyvinyl alcohol aqueous solution;
step 2, mixing the polyvinyl alcohol aqueous solution and the modified polymer emulsion according to the mass ratio of 1:5-6, and uniformly stirring to obtain a spray solution;
and 3, heating the spray solution on line, controlling the temperature to be 50-60 ℃, feeding the spray solution into an atomizer, performing spray drying, and uniformly mixing the obtained powder with an anti-caking agent and a defoaming agent to obtain the acrylic latex powder.
Compared with the prior art, the invention has the beneficial effects that:
1. the redispersible latex powder has excellent cohesiveness, can improve the cohesive force of the building mortar, improve the cohesiveness between the mortar and the base material, improve the constructability, is suitable for the fields of building mortar and the like with high requirements on the adhesive strength, and has wide market prospect.
2. In the formula system of the redispersible latex powder, a plurality of polymer emulsions mainly comprising acrylic emulsion are selected and mixed according to a proper matching ratio, so that the advantages of the latex powder can be fully exerted, the performance of the latex powder is improved, and the application range of the latex powder is expanded.
3. In the preparation of the redispersible latex powder, the spray solution is directly heated in an on-line heating mode, so that the redispersibility of the latex powder is improved.
4. In the formula system of the redispersible latex powder, a mixture of two of calcium carbonate, talcum powder, kaolin and silicon dioxide in a mass ratio of 1:1-2 is selected as an anti-caking agent, so that particles of the latex powder are wrapped more uniformly, and the anti-caking property of the latex powder is improved.
5. In the formula system of the redispersible latex powder, one or a mixture of two of an organic silicon defoamer and a mineral oil defoamer in a mass ratio of 1:1 is selected as the defoamer, so that the film forming property of the latex powder is improved, and the bonding strength of the mortar is improved.
6. The redispersible latex powder has simple preparation process and easy realization of industrialization.
Detailed Description
The novel acrylic latex powder and the preparation method thereof of the present invention will be further illustrated by the following embodiments, which are described herein for the purpose of illustration and explanation and are not intended to limit the present invention. All other embodiments, which can be obtained by a skilled person without making creative efforts based on the embodiments of the present invention, belong to the protection scope of the present invention.
The following examples are all commercially available starting materials, for example: polyvinyl alcohol with various polymerization degrees and alcoholysis degrees is purchased from Anhui Uygur New materials, Ltd; the vinyl acetate-methyl acrylate copolymer emulsion is a product of Anhui Wei high and new materials, namely, Limited company; the vinyl acetate-acrylic acid copolymer emulsion is a product of Anhui Wei high-new material stocks, Inc.; the vinyl acetate-ethylene copolymer emulsion is a product of Guangxi Guangdong-vitamin chemical industry Co., Ltd; the vinyl acetate-butyl acrylate copolymer emulsion is a product of Anhui Wei high-new material stocks, Inc.
Example 1
The novel acrylic latex powder comprises the following raw materials: 600 parts of modified polymer emulsion (a mixture of vinyl acetate-methyl acrylate copolymer emulsion, vinyl acetate-acrylic acid copolymer emulsion and vinyl acetate-ethylene copolymer emulsion in a mass ratio of 1:1: 1); 10 parts of polyvinyl alcohol; 5 parts of an anti-caking agent; and 1 part of a defoaming agent. Wherein: the solid content of the modified polymer emulsion is 50.2 percent, and the Brookfield viscosity is 1002 mpa.s; PVA0588 is selected as the polyvinyl alcohol; the anti-caking agent is a mixture of calcium carbonate and talcum powder according to the mass ratio of 1: 1; the defoaming agent is selected from organosilicon defoaming agents.
The preparation method of the novel acrylic latex powder comprises four main processes of dissolving, blending, drying and mixing. The method comprises the following specific steps:
a dissolving process: adding a small amount of water into a dissolving kettle, then adding polyvinyl alcohol, and swelling for 30 min; introducing water vapor into the dissolving kettle, heating to 90 ℃, and stirring to fully dissolve the polyvinyl alcohol; after stirring for 1h, an aqueous solution of polyvinyl alcohol was obtained with a solid content of 9.98%.
Blending: and mixing the polyvinyl alcohol aqueous solution and the modified polymer emulsion, and uniformly stirring to obtain spray liquid with the viscosity of 380 mpa.s.
A drying procedure: heating the spray liquid on line at 50-60 deg.C, introducing into atomizer, spray drying (inlet temperature of drying tower 132 deg.C, outlet temperature of drying tower 77 deg.C), and introducing the obtained powder into drying tower.
A mixing procedure: and mixing the powder obtained by drying with an anti-caking agent and a defoaming agent according to a weight ratio, and blowing the mixture into a storage bin for mixing again to obtain the finished product of the acrylic latex powder.
Example 2
The novel acrylic latex powder comprises the following raw materials: 600 parts of modified polymer emulsion (a mixture of vinyl acetate-acrylic acid copolymer emulsion, vinyl acetate-ethylene copolymer emulsion and vinyl acetate-butyl acrylate copolymer emulsion in a mass ratio of 1:1: 1); 10 parts of polyvinyl alcohol; 6 parts of an anti-caking agent; 1.2 parts of a defoaming agent. Wherein: the modified polymer emulsion had a solids content of 53.5% and a Brookfield viscosity of 1320 mpa.s; PVA0588 is selected as the polyvinyl alcohol; the anti-caking agent is a mixture of calcium carbonate and talcum powder according to the mass ratio of 1: 1; the defoaming agent is selected from organosilicon defoaming agents.
The preparation method of the novel acrylic latex powder comprises four main processes of dissolving, blending, drying and mixing. The method comprises the following specific steps:
a dissolving process: adding a small amount of water into a dissolving kettle, then adding polyvinyl alcohol, and swelling for 30 min; introducing water vapor into the dissolving kettle, heating to 90 ℃, and stirring to fully dissolve the polyvinyl alcohol; after stirring for 1h, an aqueous solution of polyvinyl alcohol was obtained with a solid content of 9.89%.
Blending: and mixing the polyvinyl alcohol aqueous solution and the modified polymer emulsion, and uniformly stirring to obtain a spray solution with the viscosity of 440 mpa.s.
A drying procedure: heating the spray liquid on line at 50-60 deg.C, introducing into atomizer, spray drying (inlet temperature of drying tower is 135 deg.C, outlet temperature is 78 deg.C), and introducing the obtained powder into drying tower.
A mixing procedure: and mixing the powder obtained by drying with an anti-caking agent and a defoaming agent according to a weight ratio, and blowing the mixture into a storage bin for mixing again to obtain the finished product of the acrylic latex powder.
Example 3
The novel acrylic latex powder comprises the following raw materials: 600 parts of modified polymer emulsion (a mixture of vinyl acetate-acrylic acid copolymer emulsion, vinyl acetate-ethylene copolymer emulsion and vinyl acetate-butyl acrylate copolymer emulsion in a mass ratio of 1:1: 1); 10 parts of polyvinyl alcohol; 6 parts of an anti-caking agent; 1.2 parts of a defoaming agent. Wherein: the modified polymer emulsion had a solids content of 53.5% and a Brookfield viscosity of 1320 mpa.s; PVA1799 is selected as polyvinyl alcohol; the anti-caking agent is a mixture of calcium carbonate and talcum powder according to the mass ratio of 1: 1; the defoaming agent is selected from organosilicon defoaming agents.
The preparation method of the novel acrylic latex powder comprises four main processes of dissolving, blending, drying and mixing. The method comprises the following specific steps:
a dissolving process: adding a small amount of water into a dissolving kettle, then adding polyvinyl alcohol, and swelling for 30 min; introducing water vapor into the dissolving kettle, heating to 90 ℃, and stirring to fully dissolve the polyvinyl alcohol; after stirring for 1h, an aqueous solution of polyvinyl alcohol with a solid content of 10.02% was obtained.
Blending: and mixing the polyvinyl alcohol aqueous solution and the modified polymer emulsion, and uniformly stirring to obtain spray liquid with the viscosity of 530 mpa.s.
A drying procedure: heating the spray liquid on line at 50-60 deg.C, introducing into atomizer, spray drying (inlet temperature of drying tower is 135 deg.C, outlet temperature is 78 deg.C), and introducing the obtained powder into drying tower.
A mixing procedure: and mixing the powder obtained by drying with an anti-caking agent and a defoaming agent according to a weight ratio, and blowing the mixture into a storage bin for mixing again to obtain the finished product of the acrylic latex powder.
Comparative example 1
Compared with the latex powder of the embodiment 1, the polymer emulsion adopts polyvinyl acetate emulsion, and comprises the following raw materials in parts by weight: 600 parts of polyvinyl acetate emulsion, 10 parts of polyvinyl alcohol and 5 parts of anti-caking agent. Wherein: the solid content of the polymer emulsion is 48.5 percent, and the Brookfield viscosity is 1100 mpa.s; PVA0588 is selected as the polyvinyl alcohol; the anti-caking agent is a mixture of calcium carbonate and talcum powder according to the mass ratio of 1: 1.
The preparation method of the latex powder comprises four main procedures of dissolution, blending, drying and mixing. The method comprises the following specific steps:
a dissolving process: adding a small amount of water into a dissolving kettle, then adding polyvinyl alcohol, and swelling for 30 min; introducing water vapor into the dissolving kettle, heating to 90 ℃, and stirring to fully dissolve the polyvinyl alcohol; after stirring for 1h, an aqueous solution of polyvinyl alcohol was obtained with a solid content of 9.98%.
Blending: and mixing the polyvinyl alcohol aqueous solution with the polymer emulsion, and uniformly stirring to obtain spray liquid with the viscosity of 375 mpa.s.
A drying procedure: heating the spray liquid on line at 50-60 deg.C, introducing into atomizer, spray drying (inlet temperature of drying tower 132 deg.C, outlet temperature of drying tower 77 deg.C), and introducing the obtained powder into drying tower.
A mixing procedure: and mixing the dried powder with an anti-caking agent and a defoaming agent according to a weight ratio, and blowing the mixture into a storage bin for mixing again to obtain the finished product of the latex powder.
The latex powders obtained in the examples and the comparative examples are subjected to the following performance tests: (reference standard: GBT29594-2013, GB/T29906-2013)
| Index (I) | Example 1 | Example 2 | Example 3 | Comparative example 1 |
| Bulk density, g/L | 499 | 500 | 495 | 489 |
| Ash content% | 13.2 | 13.1 | 12.9 | 13.5 |
| Original bonding strength to cement board, MPa | 0.85 | 0.84 | 0.84 | 0.81 |
| Water curing strength of adhesion to cement board, MPa | 0.78 | 0.76 | 0.76 | 0.55 |
From the performance detection result, the bonding strength of the produced novel acrylic latex powder and the cement board is higher than that of latex powder produced by polyvinyl acetate emulsion, the water-resistant loss rate is obviously lower than that of the polyvinyl acetate emulsion, the standard requirement is met, and the bonding force with a base material in mixed mortar is higher than that of the standard requirement.
The foregoing is directed to preferred embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope of the technical solution of the present invention.
Claims (10)
1. A novel acrylic latex powder is characterized in that: the raw materials of the acrylic latex powder comprise modified polymer emulsion, polyvinyl alcohol aqueous solution, anti-caking agent and defoaming agent.
2. The novel acrylic latex powder of claim 1, wherein: the modified polymer emulsion is a mixture of at least three of vinyl acetate-methyl acrylate copolymer emulsion, vinyl acetate-acrylic acid copolymer emulsion, vinyl acetate-ethylene copolymer emulsion, vinyl acetate-butyl acrylate copolymer emulsion, vinyl acetate-vinyl chloride copolymer emulsion and pure acrylic acid emulsion in equal mass ratio.
3. The novel acrylic latex powder according to claim 1 or 2, characterized in that: the solid content of the modified polymer emulsion is 45-65%, and the Brookfield viscosity is 500-6000 mpa.s.
4. The novel acrylic latex powder according to claim 1 or 2, characterized in that: the polymerization degree of the polyvinyl alcohol is 400-2600, and the alcoholysis degree is 88-99%.
5. The novel acrylic latex powder according to claim 1 or 2, characterized in that: the solid content of the polyvinyl alcohol aqueous solution is 8% -25%, and the mass ratio of the polyvinyl alcohol aqueous solution to the modified polymer emulsion is 1: 5-6.
6. The novel acrylic latex powder according to claim 1 or 2, characterized in that: the anti-caking agent is a mixture of two of calcium carbonate, talcum powder, kaolin and silicon dioxide according to the mass ratio of 1: 1-2.
7. The novel acrylic latex powder according to claim 1 or 2, characterized in that: the addition amount of the anti-caking agent accounts for 0.5 to 5 percent of the total mass of the solids in the modified polymer emulsion and the polyvinyl alcohol aqueous solution.
8. The novel acrylic latex powder according to claim 1 or 2, characterized in that: the defoaming agent is one or a mixture of two of an organic silicon defoaming agent and a mineral oil defoaming agent according to the mass ratio of 1: 1.
9. The novel acrylic latex powder according to claim 1 or 2, characterized in that: the addition amount of the defoaming agent is 0.1-1% of the total mass of the solids in the modified polymer emulsion and the polyvinyl alcohol aqueous solution.
10. The preparation method of the novel acrylic latex powder of any one of claims 1 to 9, which is characterized by comprising the following steps:
step 1, adding a small amount of water into a dissolving kettle, then adding polyvinyl alcohol, and swelling for 30 min; introducing water vapor into the dissolving kettle and stirring to fully dissolve the polyvinyl alcohol; stirring for 1h to obtain a polyvinyl alcohol aqueous solution;
step 2, mixing the polyvinyl alcohol aqueous solution and the modified polymer emulsion according to the mass ratio of 1:5-6, and uniformly stirring to obtain a spray solution;
and 3, heating the spray solution on line, controlling the temperature to be 50-60 ℃, feeding the spray solution into an atomizer, performing spray drying, and uniformly mixing the obtained powder with an anti-caking agent and a defoaming agent to obtain the acrylic latex powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011049170.0A CN112143149A (en) | 2020-09-29 | 2020-09-29 | Novel acrylic latex powder and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011049170.0A CN112143149A (en) | 2020-09-29 | 2020-09-29 | Novel acrylic latex powder and preparation method thereof |
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| CN112143149A true CN112143149A (en) | 2020-12-29 |
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| CN202011049170.0A Pending CN112143149A (en) | 2020-09-29 | 2020-09-29 | Novel acrylic latex powder and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112852227A (en) * | 2021-01-14 | 2021-05-28 | 佛山市凯隽新建材科技有限公司 | High-molecular polymer spraying material for tunnel waterproofing and preparation and application methods thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103408241A (en) * | 2013-07-23 | 2013-11-27 | 上海法普罗新材料股份有限公司 | Redispersible emulsion powder and preparation method thereof |
| CN103408770A (en) * | 2013-07-23 | 2013-11-27 | 上海法普罗新材料股份有限公司 | Preparation method of redispersible emulsion powder |
| CN105086308A (en) * | 2015-07-30 | 2015-11-25 | 北京博润佳科技有限公司 | Water-resistant re-dispersible latex powder |
| CN107129629A (en) * | 2017-06-29 | 2017-09-05 | 北京宝辰联合科技股份有限公司 | A kind of redispersible latex powder and preparation method thereof |
| CN110684307A (en) * | 2019-10-30 | 2020-01-14 | 安徽皖维花山新材料有限责任公司 | Water-resistant redispersible latex powder and preparation method thereof |
| CN110684306A (en) * | 2019-10-30 | 2020-01-14 | 安徽皖维花山新材料有限责任公司 | EVA type re-dispersible latex powder and preparation method thereof |
-
2020
- 2020-09-29 CN CN202011049170.0A patent/CN112143149A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103408241A (en) * | 2013-07-23 | 2013-11-27 | 上海法普罗新材料股份有限公司 | Redispersible emulsion powder and preparation method thereof |
| CN103408770A (en) * | 2013-07-23 | 2013-11-27 | 上海法普罗新材料股份有限公司 | Preparation method of redispersible emulsion powder |
| CN105086308A (en) * | 2015-07-30 | 2015-11-25 | 北京博润佳科技有限公司 | Water-resistant re-dispersible latex powder |
| CN107129629A (en) * | 2017-06-29 | 2017-09-05 | 北京宝辰联合科技股份有限公司 | A kind of redispersible latex powder and preparation method thereof |
| CN110684307A (en) * | 2019-10-30 | 2020-01-14 | 安徽皖维花山新材料有限责任公司 | Water-resistant redispersible latex powder and preparation method thereof |
| CN110684306A (en) * | 2019-10-30 | 2020-01-14 | 安徽皖维花山新材料有限责任公司 | EVA type re-dispersible latex powder and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 李红强主编: "《胶粘原理、技术及应用》", 31 January 2014, 广州：华南理工大学出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112852227A (en) * | 2021-01-14 | 2021-05-28 | 佛山市凯隽新建材科技有限公司 | High-molecular polymer spraying material for tunnel waterproofing and preparation and application methods thereof |
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Application publication date: 20201229 |