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Low-ammonia self-crosslinked aqueous acrylic acid emulsion and preparation method thereof

A water-based acrylic, self-crosslinking technology, applied in the direction of coating, etc., can solve the problems of unattainable performance, whitening of dry film of coating film, high processing cost, etc., and achieve the effect of reducing damage, reducing hydrolysis and improving suspension capacity

Inactive Publication Date: 2017-05-31
上海巴德富实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the existing improvement can prevent the release of ammonia gas by preparing acrylate emulsions without amide functional monomers, such emulsions not only have high processing costs, but also cannot achieve the performance of acrylate emulsions containing amine functional monomers. The requirements of the emulsion, and there are defects such as whitening of the dry film, poor mechanical properties, and low adhesion, so this type of acrylate emulsion without amide groups has not been widely used in waterproof coatings.

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  • Low-ammonia self-crosslinked aqueous acrylic acid emulsion and preparation method thereof

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preparation example Construction

[0036] The preparation method of low ammonia self-crosslinking water-based acrylic acid emulsion of the present invention comprises the following steps:

[0037] a) Preparation of base material A liquid: under normal temperature and pressure, add 30-70% of the total mass of deionized water, and total emulsifier 8-10% of the mass, 30-50% of the total mass of the pH regulator, heated while stirring to raise the temperature in the reactor to 75-80°C;

[0038] b) Preparation of pre-emulsion B: under normal temperature and pressure, mix 10-50% of the total mass of deionized water, acrylate monomers, the rest of emulsifier, and acrylic acid functional monomers into a uniform solution, and stir for 10 - 30 minutes standby;

[0039] c) Preparation of initiator solution C: Add the initiator into deionized water with a total mass of 5-15% at normal temperature and pressure, and stir until completely dissolved;

[0040] d) Preparation of pH regulator solution D: under normal temperatur...

Embodiment 1

[0047] The low ammonia self-crosslinking waterborne acrylic emulsion of the present invention comprises deionized water, ethyl acrylate, styrene, acrylamide functional monomer, acrylic acid, fatty alcohol ethoxylate, C 10 -C 20 Alkyl sulfate, ammonium persulfate, sodium carbonate, hydrogen peroxide, L-ascorbic acid, the above components are calculated in parts by mass: 100 parts of deionized water, 60 parts of ethyl acrylate, 30 parts of styrene , 0.5 parts of acrylamide functional monomer, 0.1 parts of acrylic acid, 0.8 parts of fatty alcohol ethoxylate, C 10 -C 20 0.2 part of alkyl sulfate, 0.3 part of ammonium persulfate, 0.01 part of sodium carbonate, 0.1 part of hydrogen peroxide, 0.05 part of L-ascorbic acid.

[0048] The preparation method of low ammonia self-crosslinking water-based acrylic acid emulsion of the present invention comprises the following steps:

[0049] a) Preparation of base material A liquid: under normal temperature and pressure, add 30% of the tot...

Embodiment 2

[0058] The low ammonia self-crosslinking aqueous acrylic emulsion of the present invention comprises deionized water, ethyl acrylate, n-butyl acrylate, isooctyl acrylate, hydroxyethyl acrylate, styrene, acrylamide functional monomer, acrylic acid, methacrylic acid, Itaconic acid, fatty alcohol ethoxylates, alkyl ethoxylates, C 10 -C 20 Alkyl Sulfate, C 10 -C 20 Sodium Alkylbenzene Sulfonate, Sulfosuccinic Acid, Ammonium Persulfate, Potassium Persulfate, Sodium Persulfate, Sodium Carbonate, Sodium Bicarbonate, Calcium Acetate, Sodium Acetate, Hydrogen Peroxide, Tert-Butyl Hydroperoxide, L- Ascorbic acid, sodium bisulfite, sodium metabisulfite, the above components are calculated in parts by mass: 100 parts of deionized water, 20 parts of ethyl acrylate, 20 parts of n-butyl acrylate, 20 parts of isooctyl acrylate, 30 parts of hydroxyethyl acrylate, 60 parts of styrene, 2 parts of acrylamide functional monomer, 1 part of acrylic acid, 1 part of methacrylic acid, 1 part of itac...

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Abstract

The invention discloses a low-ammonia self-crosslinked aqueous acrylic acid emulsion. The emulsion comprises the following components in parts by mass: 100 parts of deionized water, 60-90 parts of alkyl acrylate, 30-60 parts of styrene, 0.5-2 parts of an acrylamide functional monomer, 0.1-3 parts of an acrylic acid functional monomer, 1-10 parts of an emulsifier, 0.3-3 parts of an initiator, 0.01-0.1 part of a pH regulator, 0.1-0.5 part of an oxidizing agent, and 0.05-0.2 part of a reducing agent. The low-ammonia self-crosslinked aqueous acrylic acid emulsion has the advantages of small ammonia gas releasing amount, excellent mechanical properties and adhesive properties.

Description

technical field [0001] The invention relates to the processing field of architectural coatings, in particular to a low-ammonia self-crosslinking water-based acrylic emulsion and a preparation method thereof. Background technique [0002] Acrylic emulsion is a kind of architectural coating emulsion. Because of its excellent waterproof performance, it is widely used in interior wall coatings, exterior wall coatings and closed coatings. The current waterproof coating is based on emulsion, mixed with cement and other fillers, pigments and additives. However, the traditional cement waterproof coating system is mainly two-component system, and the emulsion used in the liquid material component is mostly It is an acrylate emulsion containing amine functional monomers. After this emulsion is mixed with cement and other powder materials, the resulting mixture is mostly strongly alkaline, and the amide group will undergo a rapid hydrolysis reaction under strong alkali conditions, a...

Claims

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Application Information

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IPC IPC(8): C08F220/18C08F212/08C08F220/56C08F220/06C08F220/28C08F222/02C08F2/26C08F2/30C09D133/08C09D125/14
CPCC09D125/14C09D133/08C08F2/26C08F2/30C08F212/08C08F220/18C08F220/56C08F220/06C08F220/281C08F220/1804C08F220/1808C08F222/02C08F220/1802
Inventor 谢颖麟刘燕罗云邱敬农
Owner 上海巴德富实业有限公司