Acrylic water-based paint can be divided into water-dis […]
Acrylic water-based paint can be divided into water-dispersible and water-soluble two major categories. The former is a coating based on water emulsion or hydrosol. Water-soluble acrylate coatings are made of copolymer resins with reactive cross-linkable functional groups, multi-system thermosetting coatings, with or without cross-linked resins in the preparation of paints, so that cross-linking of reactive functional groups occurs during film formation. Structural paint film. The development of water-based acrylate coatings can replace most of the organic volatile solvents with water under the conditions that ensure the unique properties of acrylate coatings, thereby significantly reducing air pollution.
The water-soluble acrylic resin is mostly of an anionic type, and an appropriate amount of an unsaturated carboxylic acid such as acrylic acid, methacrylic acid, maleic anhydride, and methylene succinic acid is selected from the monomers of the copolymer resin so that the side chain has carboxyl groups thereon. And then use organic amines or ammonia to form a salt and water solubility. In addition, the water solubility of the resin can also be increased on the side chain of the resin by selecting suitable monomers to introduce hydrophilic groups such as -OH hydroxyl group, -CONH2 amido or -O-ether bond. The neutralized salted acrylic resin is soluble in water, but its water solubility is not very strong, and often forms a milky liquid or a highly viscous solution. Therefore, a certain proportion of hydrophilic aids must be added to the water-soluble resin. Solvents to increase the water solubility of the resin.