Thermoplastic acrylic resin used in special substrates, and its preparation method

Abstract

The invention discloses a thermoplastic acrylic resin used in special substrates, and its preparation method. The method comprises the following steps: adding 38.0 parts of toluene and 10.0 parts of isobutanol into a reaction kettle, introducing 0.2 Nm<3> / h of nitrogen, heating to 105-115DEG C, and keeping the temperature constant; adding 21.7 parts of methyl methacrylate, 27.69 parts of n-butyl methacrylate, 0.61 parts of methacrylic acid, 0.35 parts of tert-butyl peroxy-2-ethyl ester and 0.02 parts of an adhesion promoter into an elevated tank, and stirring for 30min; adding the above obtained mixture into the reaction kettle within 4h, and carrying out heat insulation for 2h; and adding 1.48 parts of toluene and 0.15-2 parts of tert-butyl peroxy-2-ethyl ester, carrying out heat insulation for 6h, cooling to 70DEG C, and discharging. The acrylic resin has very good adhesion to electroplating nickel, zinc, chromium and aluminum, and has excellent resistance to solvents.

Description

Technical field [0001] The invention relates to the synthetic preparation field of a thermoplastic acrylic resin, in particular to a thermoplastic acrylic resin applied to a special substrate and a preparation method thereof. Background technique [0002] Thermoplastic acrylic resin is a type of thermoplastic resin made by polymerization of acrylic acid, methacrylic acid and their derivatives (such as esters, nitriles, amides). It can be softened by heating and solidified by cooling repeatedly. Generally linear polymer compounds, which can be homopolymers or copolymers, have good physical and mechanical properties, excellent weather resistance, chemical resistance and water resistance, and high gloss and color retention. The molecular weight of thermoplastic acrylic resin used in the coating industry is generally 75 000 to 120,000. It is commonly used in combination with nitrocellulose, cellulose acetate butyrate and perchloroethylene resin to improve the performance of the coat...

AI Technical Summary

Problems solved by technology

However, there are also some disadvantages: low solid content (high viscosity when the solid content is high, and wire drawing is easy to occur when spraying), poor fullness of the coating film, easy to be brittle at low temperature, easy to stick at high temperature, poor solvent release, slow to dry, durable poor solvent

[0004] In the Chinese patent application number "201310088695.9", an invention patent named "thermoplastic acrylic resin" is disclosed, and its technical scheme is as follows: styrene (industrial) 10-12, methyl methacrylate (industrial) 15-18, Butyl Acrylate (Industrial) 4-6, Acrylic Acid (Industrial) 2-3, Ethyl Acrylate (Industrial) 4-9, Zinc Methacrylate (Industrial) 3-10, Dibenzoyl Peroxide (Industrial) 0.25- 0.35, toluene (industry) 40, butyl acetate (industry) 10; thermoplastic acrylic resin of the present invention has improved solvent-resistant scrubbing ability and antifouling ability, and the acrylic resin of synthesis can be used for making the one-component acrylic acid of anti-ethanol solvent scrubbing coatings, however, the thermoplastic acrylics of the present invention may have poor adhesion to electroplated nickel, zinc, chrome, aluminum, etc.

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