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Method for preparing pure acrylate copolymer coating emulsion for building external wall elastic coating

An elastic emulsion and elastic coating technology, which is applied in the direction of antifouling/underwater coatings, coatings, paints containing biocide, etc., can solve the problems of poor stain resistance, poor low temperature flexibility, etc., and achieve narrow distribution and small particle size Effect

Active Publication Date: 2013-07-10
HENGSHUI XINGUANG CHEM
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] The present invention solves the problems of poor low-temperature flexibility and poor stain resistance of the current acrylate copolymer emulsion used in elastic coatings for building exterior walls, and uses the combination of seed-controllable emulsion polymerization technology and phase-controlled film-forming technology to provide a durable Elastic coating with good stain and weather resistance and preparation method thereof

Method used

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  • Method for preparing pure acrylate copolymer coating emulsion for building external wall elastic coating
  • Method for preparing pure acrylate copolymer coating emulsion for building external wall elastic coating
  • Method for preparing pure acrylate copolymer coating emulsion for building external wall elastic coating

Examples

Experimental program
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Embodiment

[0127] Ⅰ Preparation of seed emulsion

[0128] (1) Pre-emulsification Add metered deionized water (DW) to a 5000ml three-neck flask, start stirring, add metered % emulsifier, start to drop the metered monomer after 15 minutes, and continue high-speed stirring and emulsification for about 1 hour;

[0129] (2) Polymerization Add deionized water to a 1000ml four-neck flask equipped with stirring, reflux condenser, thermometer and constant pressure dropping funnel, start stirring, add the measured bottom emulsifier, when the temperature rises to 85°C, add the measured Initiator aqueous solution, wait for the temperature to reach the highest level and stabilize for 2-3 minutes, then start to add the pre-emulsion solution and the initiator aqueous solution dropwise, the temperature is controlled at 86-88°C during the dropping, and the total dropping time is controlled at 90-100 minutes ; After the dropwise addition, keep warm for 1h;

[0130] (3) Cool down to below 40°C and add mea...

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Abstract

The invention discloses a method for preparing a pure acrylate copolymer coating emulsion for a building external wall elastic coating, including a preparation method of a seed emulsion, a pure acrylate type elastic emulsion prepared from the seed emulsion and a preparation method thereof, as well as an elastic coating prepared from the elastic emulsion added with auxiliaries, a filler and the like, wherein the ratio (by wt) of comonomers St:MMA:BMA:BA of the copolymer of the seed emulsion is (32-42):(18-27):(18-27):(12-22); the hansch constant of the polymer of the seed emulsion is 3.00-3.81 pKa; and the elastic emulsion is obtained through seed polymerization of a monomer mixture which is composed of acrylic acid (AA), acrylamide (AM), butyl acrylate (BA), methyl methacrylate (MMA) and n-butyl methacrylate (BMA) in a monomer ratio (wt) of (0.8-5):(0.8-5):(25-45):(7-33):(7-33). As the elastic coating prepared from the pure acrylate type elastic emulsion prepared by the method provided by the invention is obviously improved in properties such as stain resistance, weather fastness, low-temperature elasticity, adhesiveness, water tolerance and the like, the elastic coating can be used as an external wall decorative coating high in requirement for durability and thus can be widely applied to the field of building coating.

Description

technical field [0001] The invention relates to a method for preparing a pure acrylate copolymer paint emulsion for building exterior wall elastic paint, in particular to a phase-controlled film-forming pure acrylate type elastic paint emulsion, a paint using the emulsion and a preparation method thereof, belonging to field of architectural coatings. Background technique [0002] With the rapid development of my country's economy, the consumption of architectural coatings in my country is increasing at an annual growth rate of 15%. Emulsion consumes nearly 150,000 tons. By 2011, my country's architectural coatings had exceeded 4.5 million tons. In 2011, the actual consumption of architectural coatings was 4.6 million tons. With the standardization of architectural coatings in my country, the amount of high-end products has accounted for 20% to 30% of architectural coating emulsions. Therefore, it is the coating emulsion industry to develop high-end architectural coating emul...

Claims

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Application Information

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IPC IPC(8): C08F212/08C08F220/14C08F220/18C08F2/30C08F2/26C08F220/06C08F220/56C09D133/08C09D7/12C09D5/16
Inventor 田立壮田海水王志宽高昊李俊超
Owner HENGSHUI XINGUANG CHEM
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