Alkyd resin for wood lacquer and preparation method thereof

Abstract

The invention discloses alkyd resin for wood lacquer and a preparation method thereof. According to the raw material formula, the alkyd resin for the wood lacquer comprises the following components in percentage by mass: 18.3 to 28.3 percent of soybean oleic acid, 10.2 to 20.2 percent of glycerin, 3.8 to 7.8 percent of pentaerythritol, 17.6 to 21.6 percent of recycled terephthalic acid, 0.05 to 0.2 percent of color substration agent, 0.05 to 0.2 percent of antioxidant, 2.5 to 5.5 percent of phthalic anhydride, 3.2 to 7.2 percent of benzoic acid, 2 to 5 percent of dimethylbenzene, 18 to 30 percent of thinning agent and 0.05 to 0.2 percent of wetting dispersant. Terephthalic acid is adopted, and the unique chemical performance of the terephthalic acid endows the resin with high dryness and weather resistance; waste and inferior terephthalic acid produced by a petrochemical enterprise is utilized, so that the production cost of the resin is lower than that of alkyd resin produced by the conventional method; simultaneously, waste of the petrochemical enterprise is reduced, the environment is prevented from being polluted, and wastes are utilized to save energy and reduce emission.

Description

technical field [0001] The invention relates to the technical field of macromolecules, in particular to resins for coatings, in particular to an alkyd resin for wood varnishes and a preparation method thereof. Background technique [0002] Alkyd resin coatings have the characteristics of good film adhesion, brightness, and fullness. They are generally organic polymer resins made from organic chemical raw materials such as oil (or oleic acid), polyols, and polyacids through condensation chemical reactions. The polybasic acid used in the synthesis of alkyd resins is mostly phthalic anhydride (PA, referred to as phthalic anhydride). [0003] Alkyd resin paint is the main film-forming substance of traditional blending paints, wood paints and enamel paints, and its cost directly affects the production cost of paints. Therefore, it is imperative to reduce the production cost of alkyd resins. [0004] There are many ways to reduce the production cost of alkyd resin, such as replac...

AI Technical Summary

Problems solved by technology

[0008] Under the conditions of the same alkyd resin production equipment, it is difficult to use terephthalic acid as a raw material to react, and it is difficult to produce a clear and transparent resin with similar properties to the alkyd resin for wood lacquer prepared with phthalic anhydride as a raw material

[0009] In the chemical industry, terephthalic acid is generally used as a raw material for polyester chips, and the difficulty of using waste terephthalic acid to produce alkyd resins for wood lacquers lies in the complexity of the raw material components of terephthalic acid. In addition to mainly containing terephthalic acid, it also contains a small amount of impurities such as benzoic acid, maleic anhydride, trimellitic anhydride, etc., which makes the formula design difficult and the formula calculation error is large