Preparation method of acrylic modified alkyd resin

Abstract

The invention provides a preparation method of acrylic modified alkyd resin. The acrylic modified alkyd resin is prepared from a 1 component and a 2 component according to parts by weight, wherein the 1 component comprises 15.0 to 25.0 parts of methyl methacrylate, 15.0 to 25.0 parts of styrene, 3.0 to 5.0 parts of butyl acrylate, 2.0 to 4.0 parts of acrylic acid, 1.5 to 2.5 parts of benzoyl peroxide and 36.5 to 61.5 parts of xylene, and the 2 component comprises 20.0 to 25.0 parts of sunflower oil, 9.0 to 10.0 parts of phthalic anhydride, 7.0 to 9.0 parts of pentaerythritol with 96 percent, 15.0 to 20.0 parts of acrylic prepolymer, 0.01 to 0.02 part of lithium hydroxide, 2.0 to 4.0 parts of benzoic acid and 41.5 to 52.0 parts of mixed solvent of a 200# solvent and xylene. The preparation method of the acrylic modified alkyd resin comprises the following steps of: preparing; adding the xylene into a four-mouth flask, heating up to 130 to 140 DEG C and refluxing; adding monomers sequentially, wherein the benzoyl peroxide is firstly added by 90 percent of the total quantity; after refluxing the xylene for 10 to 30min, starting the operation of dripping, controlling the finish of the operation of dripping within 3 to 5h, afterwards carrying out heat preservation for 0.5 to 1.0h, then adding the balance of 10 percent of benzoyl peroxide, cooling after carrying out heat preservation for 0.5 to 1h, and discharging so as to obtain the acrylic prepolymer; and adding the 2 component after firstly mixing the 200# solvent and the xylene according to the proportion of 7:3 evenly so as to obtain the acrylic modified alkyd resin by preparation.

Description

technical field [0001] The invention relates to enamel paint, mixed paint and antirust paint, and the method is especially suitable for the modification of alkyd resin. Background technique [0002] Due to its structural characteristics, alkyd resin has the advantages of plump and bright coating film, easy construction, cross-linking with oxygen, self-drying and other advantages, and is widely used; but it is not easy to dry and slow curing at room temperature, and its hardness Low, poor water resistance and weather resistance, and must be modified. The acrylic modified alkyd resin not only retains the characteristics of good fullness and easy construction of alkyd resin, but also inherits the characteristics of fast drying of thermoplastic acrylic resin, enhances weather resistance and gloss retention, and has a low cost. cost-effective. [0003] Literature search disclosure: 1) Wang Chengwei and Qu Jinqing from the Institute of Chemical Engineering, South China Universi...

AI Technical Summary

Problems solved by technology

[0002] Due to its structural characteristics, alkyd resin has the advantages of plump and bright coating film, easy construction, cross-linking with oxygen, self-drying and other advantages, and is widely used; but it is not easy to dry and slow curing at room temperature, and its hardness Low, poor water resistance and weather resistance, and must be modified