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    • 3. 发明授权
    • Copolymerizable ultraviolet light absorber members which are .alpha.,.beta.
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    • 可共聚的紫外光吸收体,它们是2-羟基,烷氧基,羟甲基二苯甲酮的α,β-不饱和二羧酸半酯
    • US4312995A
    • 1982-01-26
    • US168224
    • 1980-07-10
    • Eugene S. BarabasPrakash MallyaStanley J. Gromelski, Jr.
    • Eugene S. BarabasPrakash MallyaStanley J. Gromelski, Jr.
    • C07C59/84
    • C07C69/738
    • This invention relates to copolymerizable ultraviolet light absorber monomers which are .alpha.,.beta.-unsaturated dicarboxylic half-esters of 2-hydroxy,alkoxy,methylolbenzophenone intermediate compounds. The monomers have the formula: ##STR1## where R is alkyl C.sub.1 -C.sub.8, and n is 1 or 2, andY is a half-acyl radical of a .alpha.,.beta.-unsaturated dicarboxylic acid selected from the group of maleic and itaconic acids.The monomers herein are made by monoesterifying intermediate compounds, prepared by converting a 2-hydroxy,alkoxy,benzophenone to the corresponding methylol derivative by a formylation reaction, with the anhydride of the desired acid.In the preferred embodiments of the invention, the alkoxy group is methoxy in the 4-position, the methylol group which is half-esterified is a monomethylol group located at the 3- or 5- position of the phenyl ring containing the hydroxy group, and the acid anhydride is maleic anhydride.Copolymerization of the monomers herein with vinyl monomers provide improved ultraviolet light stable copolymers for industrial and commercial applications.
    • 本发明涉及可共聚的紫外线吸收剂单体,它们是2-羟基,烷氧基,羟甲基二苯甲酮中间体化合物的α,β-不饱和二羧酸半酯。 单体具有下式:其中R是烷基C1-C8,n是1或2,Y是选自马来酸和衣康酸的α,β-不饱和二羧酸的半酰基 。 本文中的单体通过使中间体化合物单酯化而制备,所述中间体化合物通过甲酰化反应将2-羟基,烷氧基,二苯甲酮与相应的羟甲基衍生物与所需酸的酸酐反应制备。 在本发明的优选实施方案中,烷氧基是4-位的甲氧基,半酯化的羟甲基是位于含有羟基的苯环的3-或5-位的单羟基,以及 酸酐是马来酸酐。 本文单体与乙烯基单体的共聚为工业和商业应用提供改进的紫外光稳定共聚物。