Protection from ultraviolet light by use of novel ultraviolet absorber

Claim 1

A photo-stabilized polymer composition comprising a polymer and as an ultraviolet absorber, at least one compound selected from the group consisting of cyclic imino esters represented by the following formula (I) ##STR43## wherein X 1 represents 1,2-phenylene, 1,2-naphthylene, 2,3-naphthylene, a group represented by the formula (a) ##STR44## wherein R is --O--, --CO--, --S--, --SO 2 --, --CH 2 --, --CH 2 ) 2 or --C(CH 3 ) 2 --, or a group represented by the formula (b) ##STR45## wherein R is as defined above, n is 1, 2 or 3, R 1 represents a hydrocarbon residue having a valence of n, or when n is 1, R 1 further represents a residue selected from the group consisting of a group represented by the formula (c) ##STR46## wherein R 4 represents an alkylene of 2 to 10 carbon atoms, phenylene or naphthylene, a group of the formula (d) ##STR47## wherein R 5 represents an alkyl having 1 to 10 carbon atoms, a phenyl or a naphthyl, a group of the formula (e) ##STR48## wherein R 4 and R 5 are as defined above, and R 6 is hydrogen atom or any one of the groups defined for R 5 , and a group represented by the formula (f) ##STR49## wherein R 4 and R 6 are as defined above, and R 7 is hydrogen atom or any one of the groups defined for R 5 , and when n is 2, R 1 further represents a direct bond, a residue selected from the group consisting of a group represented by the formula (g) ##STR50## wherein R 8 is any one of the groups defined for R 4 , and a group represented by the formula (h) ##STR51## wherein R 8 is as defined above, R 9 is any one of the groups defined for R 4 , and R 10 is any one of the groups defined for R 6 , wherein each of the above groups defined for X 1 and R 1 may be substituted by a substituent selected from the group consisting of alkyl groups having 1 to 10 carbon atoms, aryl groups having 6 to 12 carbon atoms, cycloalkyl groups having 5 to 12 carbon atoms, aralkyl groups having 8 to 20 carbon atoms, alkoxy groups having 1 to 10 carbon atoms, carboacyl groups having 2 to 10 carbon atoms, halogen atoms and nitro groups, and cyclic imino esters represented by the following formula (II) ##STR52## wherein A represents a group of the following formula (II)-a ##STR53## or a group of the following formula (II)-b ##STR54## wherein R 2 and R 3 are identical or different and each represents a monovalent hydrocarbon residue; and X 2 represents a tetravalent aromatic residue selected from the groups represented by the formulae: ##STR55## wherein R is as defined above, in the unreacted state.