申请人:General Electric Company
公开号:US04328346A1
公开(公告)日:1982-05-04
Silane-functionalized ultraviolet screening agent precursors comprise compounds of the formula: ##STR1## wherein R is ##STR2## R.sup.1 is C.sub.1 -C.sub.6 alkyl, R.sup.2 is C.sub.1 -C.sub.6 alkyl or C.sub.2 -C.sub.6 alkanoyl, R.sup.3 is hydrogen or C.sub.1 -C.sub.6 alkoxyl, X is 0,1 or 2, y is 1,2, or 3 and x+y=3. Under ultraviolet radiation the compounds rearrange to the corresponding .alpha.-hydroxybenzophenones which protect substrates, especially transparent plastics, against degradation.
硅烷功能化紫外线防护剂前体包括具有以下结构的化合物:其中R为,R1为C1-C6烷基,R2为C1-C6烷基或C2-C6烷酰基,R3为氢或C1-C6烷氧基,X为0、1或2,y为1、2或3,x+y=3。在紫外线辐射下,这些化合物重新排列成相应的α-羟基苯酮,可保护基材,特别是透明塑料,免受降解。