High-solid-content high-performance glycidyl tertiary carboxylic ester modified alkyd resin and preparation method thereof

Abstract

The invention discloses high-solid-content high-performance glycidyl tertiary carboxylic ester modified alkyd resin and a preparation method thereof, and belongs to the technical field of coatings. The resin is prepared from glycidyl tertiary carboxylic ester, acrylates and monomers, an initiator, vegetable oleic acid, polybasic acid, polyhydric alcohol, an antioxidant, a solvent and the like. Thepreparation method comprises the following steps: firstly, synthesizing an alkyd resin prepolymer through esterification polycondensation reaction and reflux dehydration, and then synthesizing the high-solid high-performance glycidyl tertiary carboxylic ester modified alkyd resin from the alkyd resin prepolymer, acrylates, monomers and glycidyl tertiary carboxylic ester according to a specific raw material ratio through a chemical synthesis modification method. By introducing glycidyl tertiary carboxylic ester, the water resistance, the acid resistance, the alkali resistance and the like areimproved. Compared with common acrylic acid modified alkyd resin, the high-solid-content high-performance glycidyl tertiary carboxylic ester modified alkyd resin has lower viscosity and a proper amount of reactive groups, and is better in miscibility with other resins, and a paint film formed after crosslinking is improved in weather resistance and has excellent water resistance and acid corrosionresistance.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a high-solid content high-performance glycidyl tertiary carbonic acid ester modified alkyd resin and a preparation method thereof. Background technique [0002] Alkyd resin paint has the advantages of high fullness, excellent gloss, good flexibility, high cost performance, and convenient construction. The raw materials used in general alkyd resins come from a wide range of sources: vegetable oil or vegetable oleic acid, polyacids (such as phthalic anhydride, maleic anhydride), polyols (such as ethylene glycol, glycerol, pentaerythritol), etc. Vegetable oil or vegetable oleic acid accounts for about 50% of the composition, and its price is relatively stable. Therefore, it occupies an important position and a larger market share in solvent-based coatings. Alkyd resins can be made into varnishes, enamel paints, primers, etc., and can be combined with other resins and crosslinking...

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Problems solved by technology

[0003] The simple alkyd resin paint sold on the market has insufficient anti-adhesion and weather resistance of the paint film. The acrylic acid is used to modify the alkyd resin, and the acrylic modified alkyd resin coating obtained has better anti-adhesion and weather resistance. It has been greatly improved, but the water resistance and acid corrosion resistance of the paint film are poor

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