Waterborne acrylic resin preparation skills!
Date:
2021-11-10
The backbone of the acrylate polymer is a saturated carbon structure, and the side chain is a polar ester group, so the hardness and gloss of the polymer coating are very good. In addition, the glass transition temperature can be adjusted according to actual needs. Waterborne acrylic resin with its excellent performance of rapid development at the same time, some of its shortcomings can not be ignored, such as film drying time is long, water resistance, pollution resistance and solvent resistance is poor, these have limited its development, so in order to make waterborne acrylic resin has a wider range of applications, its modification is necessary.
The backbone of the acrylate polymer is a saturated carbon structure, and the side chain is a polar ester group, so the hardness and gloss of the polymer coating are very good. In addition, the glass transition temperature can be adjusted according to actual needs. Waterborne acrylic resin with its excellent performance of rapid development at the same time, some of its shortcomings can not be ignored, such as film drying time is long, water resistance, pollution resistance and solvent resistance is poor, these have limited its development, so in order to make waterborne acrylic resin has a wider range of applications, its modification is necessary.
A four-necked flask was charged with a certain amount of n-butanol, 1/3 of the monomer, and 1/4 of the initiator, and the temperature was raised to reflux with stirring. After reacting for 15min, the mixture of the remaining monomer and initiator was added dropwise within about 2.5h, and the reaction was maintained for 0.5h after the dropwise addition was completed, then the remaining solvent and initiator were added, and the reaction was maintained for 2.5h. After cooling to 40~50 ℃, adding ammonia and neutralizing to pH = 8~9, stirring and reacting for 0.5h, the acrylate copolymer with good water solubility was obtained.
At present, the development of water-based acrylic resin in the United States is more than 50%, and China also attaches great importance to the development of water-based coatings with low environmental load. Acrylic acid is composed of a-CH CH2 and a-COOH. Due to the many types of monomers, the types of acrylic resins synthesized are also countless, and the properties are also different, so products with different properties can be produced according to needs. The research on water-based acrylate coatings abroad can be traced back to the middle of the 20th century, and has developed rapidly in 1970 or so, and has been initially used.
Foshan Wanxia New Material Technology Co., Ltd. is a comprehensive supplier of water-based epoxy ester resin, water-based polyester resin, water-based acrylic resin series, and treatment liquid before metal table. In addition, Wanxia has a fully water-soluble drier applied to the oxidative crosslinking curing system. There are products such as passivator, degreasing powder, ceramic agent, copper cleaning agent, etc. Wan Xia was founded in 1989, specializing in water-based resin, metal surface treatment agent and other product development and production and sales of the company.
Waterborne acrylic resin, water-based resin
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