Acrylic resin and preparation method and application thereof
A technology of acrylic resin and acrylate, which is applied in coatings, polyurea/polyurethane coatings, etc., and can solve problems such as poor mechanical properties and water resistance, low VOC content, poor water resistance and mechanical properties of coating films, etc.
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preparation example 1
[0086] The acrylic resin 1 that this preparation example obtains is made up of following structural unit:
[0087]
[0088] where n 1 is 10, n 2 is 40, n 3 is 15, n 4 is 10, namely n 1 / n 0 is 0.13.
[0089] The preparation method of acrylic resin is as follows:
[0090] (1) Solution polymerization: put 60% of the total amount of propylene glycol monomethyl ether into a reactor equipped with a stirring device, a condenser, a temperature control system and a monomer dropping device, slowly heat up to the boiling point of the solvent, and start dripping after reflux add Methyl methacrylate, butyl acrylate, 2-ethylhexyl methacrylate, hydroxyethyl methacrylate, acrylic acid, remaining 40% propylene glycol monomethyl ether, 75% tert-butyl peroxybenzoate And the mixed solution of mercaptoethanol is added dropwise within 5 hours, kept warm for 1 hour, added the remaining 25% tert-butyl peroxybenzoate, kept warm for 1 hour, and stopped heating to obtain a hydroxyacrylate co...
preparation example 2
[0096] The difference with Preparation Example 1 is that in acrylic resin 2 n 1 is 1, n 2 is 55, n 3 is 25, n 4 is 20, namely n 1 / n 0 is 0.01.
preparation example 3
[0098] The difference with Preparation Example 1 is that the n in acrylic resin 3 1 is 16, n 2 is 40, n 3 is 15, n 4 is 10, namely n 1 / n 0 is 0.2.
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