Asymmetrical oxalic acid diaryl amide stabilizers

Claim 1

A composition of matter substantially consisting of an organic material that can be damaged by ultraviolet rays, having incorporated therein an ultraviolet absorbing agent in a proportion sufficient to protect said material against the influence of ultraviolet rays, said ultraviolet absorbing agent being represented by an asymmetrical oxalic acid diarylamide of the formula ##STR103##in which R 1 and R 2 each stands for a member selected from the group consisting of an alkyl group with 1 to 18 carbon atoms which may be substituted by a member selected from the group consisting of chlorine, a hydroxyl group, an alkoxy group with 1 to 4 carbon atoms, a carboxyl group, a nitrile group, a carboxylic acid amide group and a carboxylic acid alkyl ester groups with 1 to 12 carbon atoms, an alkenyl group with 3 to 4 carbon atoms, a benzyl group which may be substituted by chlorine atoms or alkyl groups, an aliphatic acyl group containing up to 18 carbon atoms and a benzoyl group which may be substituted by chlorine or an alkyl group with 1 to 4 carbon atoms; R 3 and R 4 each stands for a member selected from the group consisting of an alkyl group with 1 to 12 carbon atoms, a halogen atom, halogenalkyl group, a sulphonic acid group, a phenyl group and a phenylalkyl group whose alkyl residue contains 1 to 4 carbon atoms, or in each case two-ortho-positioned residues R 3 and/or R 4 together form a fused-on six-membered aromatic carbon ring, and m and n = 1 or 2 and p and q = 1, 2 or 3, each of the two ring systems containing apart from the bond via the --NH--group at most three substituents and the sum m+(m-1) = 1 or 2, and in other respects the substituents R 1 O--, R 2 O--, R 3 and R 4 being so constituted as to kind, number or positions that the molecule is asymmetrical.