Novel Pyrimidine-2,4,6-trione compounds

摘要

Compounds of the general formula I wherein R<1> and R<2> each independently are C2-C18 alkyl or C5-C7 cycloalkyl, or C2-C18 alkyl in which at least one methylene group is replaced by oxygen; R<3> is hydrogen, C1-C18 alkyl or C2-C18 alkyl in which at least one methylene group is replaced by oxygen, or is C1-C18 alkyl carbonyl, C3-C18 alkenyl, C3-C18 alkynyl or a group YS; R<4> is hydrogen, C1-C8 alkyl or a group OR<3>; Y is a linker group; S is a silane-, an oligosiloxane- or a polysiloxane-moiety. are effective in absorbing ultra violet radiation and can be used as sunscreen agents.