Medium/high-solid hydroxy acrylic resin and preparation method thereof

Abstract

The invention relates to a medium / high-solid hydroxy acrylic resin which is characterized by comprising the following components in parts by weight: 10-30 parts of methyl methacrylate, 5-20 parts of butyl methacrylate, 5-15 parts of butyl acrylate, 5-15 parts of hydroxyethyl methacrylate, 5-20 parts of styrene, 0.5-2.0 parts of methacrylic acid, 2-5 parts of acrylonitrile, 0.5-1.5 parts of di-tert-pentyl peroxide, 20-35 parts of dehydrated petroleum dimethylbenzene and 5-15 parts of butyl acetate. According to the preparation method, the hydroxy acrylic resin is synthesized by using a new polymerization technique. The medium / high-solid hydroxy acrylic resin synthesized by using the new polymerization technique has the advantages of excellent weather resistance, excellent gloss retention, excellent fullness, excellent decorative performance, excellent comprehensive physiochemical properties and excellent compatibility.

Description

technical field [0001] The invention belongs to coatings, in particular to a medium-high solid hydroxyl acrylic resin and a preparation method thereof. Background technique [0002] One-component thermoplastic acrylic resin, as the base material of general decorative paint and construction machinery paint, can meet the basic performance requirements, that is, good physical and chemical properties, but its solid content is low during construction, usually 15%-25% , The film is thin, the decoration and fullness are all dependent on multi-layer coating, and the thickness and fullness of the paint film are poor. ② Poor flowability and poor flow flattening, making it difficult to obtain a good appearance. ③Sensitive to temperature, products with a slightly higher glass transition temperature are prone to brittle cracks at low temperatures, and products with a slightly lower glass transition temperature tend to soften and become sticky when exposed to heat, and even stick to sand...

AI Technical Summary

Problems solved by technology

[0002] One-component thermoplastic acrylic resin, as the base material of general decorative paint and construction machinery paint, can meet the basic performance requirements, that is, good physical and chemical properties, but its solid content is low during construction, usually 15%-25% , the film is thin, the decoration and fullness depend on multi-layer coating, the thickness and fullness of the paint film are poor

②Poor flowability and poor flow flattening, it is not easy to get a good appearance

④ Poor solvent release, easy to sag when painting, not easy to dry out, although the surface is not slow to dry, sometimes it still cannot reach the proper hardness and other physical properties after 24 hours or even 48 hours

⑤ Narrow miscibility, difficult to blend with many resins

⑹ Poor wetting and dispersing properties for pigments, and the finished paints are often prone to floating and blooming

The performance of the above-mentioned prior art should be very good, but the price of the fluorine-containing monomer is higher, resulting in a higher price of the final product, and the popularization and application are limited

In addition, if the solid content is as high as 75-90%, and the solvent is 30-50 parts, it cannot be quantitatively produced

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