Octadecanoic acid, 12-hydroxy-, homopolymer, 2-hydroxy-3-[(2-methyl-1-oxo-2-propenyl)oxy]propyl ester, polymer with methyl 2-methyl-2-propenoate and oxiranylmethyl 2-methyl-2-propenoate, 2-methyl-2-propenoate 4-nitrobenzoate