Patent ID: 7199181

Claim:
A method for stabilizing polyurethane from exposure to light, oxygen, and/or heat, which comprises: incorporating a stabilizing composition into polyurethane; said stabilizing composition comprising: A) at least one 2-cyano-3,3-diarylacrylate of the formula I, wherein R 1 is C 1 –C 18 -alkyl, and R 2 and R 3, independently of one another, are hydrogen; B) at least one amine of the formula II wherein R 4 and R 5 , independently of one another, are hydrogen, or C 1 –C 4 -alkyl, and n is an integer from 2 to 10, C) at least one phenol of the formula III wherein R 6 is C 1 –C 20 -alkoxycarbonyl-C 1 –C 4 -alkyl, D) optionally, at least one chromane derivative of the formula IV where R 7 a group of the formula and E) optionally, at least one organic phosphite of the formula V wherein each of the radicals R 8 to R 10 is phenyl, optionally substituted with at least one C 1 –C 18 -alkyl group.