A kind of dibasic acid monomer containing benzoxazinone group and its polyester copolymer

Abstract

The invention relates to a biacid monomer containing benzoxazinone radical groups and a polyester copolymer thereof. The biacid monomer containing the benzoxazinone radical groups is obtained by means of reaction of 2-aminaterephthalic acid and terephthaloyl dichloride or teranaphthyl dichloride; the polyester copolymer is formed by polycondensating terephthalic acid or dimethyl terephthalate, ethylene glycol and biacid monomer containing benzoxazinone radical groups, and the molar ratio of the three monomers is 100:(10 to 90):(1 to 99). The biacid monomer has the advantages that the biacid monomer containing the benzoxazinone radical groups is connected to a polyester main chain by virtue of a copolymerization method, so that the polyester is good in ultraviolet stability and excellent in mechanical performance, and the weakness of the polyester in the prior art that after a large content of ultraviolet absorbent (the weight percent is more than 5 percent) is added, the mechanical performance is decreased can be overcome.

Description

technical field [0001] The invention relates to a dibasic acid monomer containing a benzoxazinone group with ultraviolet light absorption and a polyester copolymer thereof. Background technique [0002] UV absorbers have been widely used in the polymer material industry. At the same time, the addition of ultraviolet light absorbers and light stabilizers to polymer materials can produce a significant synergistic effect, thereby greatly improving the anti-ultraviolet light performance of polymer materials. Common UV absorbers are mainly small molecular compounds, which have the disadvantages of poor heat resistance, easy volatilization at relatively high processing temperatures, irritating odors, easy extraction, and easy migration during use. [0003] 2,2'-(1,4-phenylene)bis(4H-3,1-benzoxazin-4-one) is a kind of engineering plastics, such as nylon, polycarbonate, polyester, etc. UV absorber with wide application value. However, as a small molecule ultraviolet light absorbe...

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Problems solved by technology

However, as a small molecule ultraviolet light absorber, it is not compatible with engineering plastics and cannot be added in a higher amount (generally less than 5% by weight). When particularly good anti-ultraviolet performance is required, a higher ultraviolet Light absorbers (such as weight percentage greater than 5%) will lead to a significant decrease in mechanical properties and heat resistance (based on heat distortion temperature) of engineering plastic products

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