申请人:ISP Investments Inc.
公开号:US05830441A1
公开(公告)日:1998-11-03
A photostable UV absorbent with maximum absorption above 340 nm having the formula: ##STR1## wherein R is --CO(R.sub.2) or phenyl optionally substituted with lower alkyl and/or lower alkoxy; R.sub.2 is --alkyl, --O(C.sub.2+ alkyl), ##STR2## n has a value of from 2 to 8; S and T each independently are hydroxy, lower alkyl, lower alkoxy or, when R.sub.2 is alkyl or alkoxy, S can also be phenyl and when R.sub.2 is alkoxy, T is alkoxy, or S+T taken with the phenyl ring form a naphthyl radical or a fused benzodioxol-5-yl heterocyclic radical; k+l has a value of from 0 to 3 with the proviso that, when R.sub.2 is --O(alkyl), T is --O(lower alkyl) and the value of l is 2 or 3; R.sub.3 is hydrogen or lower alkylene; R.sub.4, R.sub.5, and R.sub.6 are each independently C.sub.1 to C.sub.18 alkyl or one of R.sub.4, R.sub.5 and R.sub.6 can be phenyl and A is an anion.
一种具有最大吸收波长在340纳米以上的光稳定性紫外吸收剂,化学式为:其中R为--CO(R.sub.2)或苄基,可选择性地取代为较低的烷基和/或较低的烷氧基;R.sub.2为--烷基,--O(C.sub.2+烷基),n的值为2至8;S和T各自独立地为羟基、较低的烷基、较低的烷氧基,或者当R.sub.2为烷基或烷氧基时,S也可以是苄基,当R.sub.2为烷氧基时,T为烷氧基,或者S+T与苄环形成萘基或融合苯二氧杂环基;k+l的值为0至3,但当R.sub.2为--O(烷基)时,T为--O(较低的烷基),且l的值为2或3;R.sub.3为氢或较低的烷基;R.sub.4、R.sub.5和R.sub.6各自独立地为C.sub.1至C.sub.18烷基,或者R.sub.4、R.sub.5和R.sub.6中的一个可以是苄基,A为阴离子。