(19)

(11)

EP 0 252 142 A1

(12)

(43) Date of publication: 13.01.1988 Bulletin 1988/02 (21) Application number: 87900922.0 (22) Date of filing: 07.01.1987

(51) International Patent Classification (IPC):  C08L 95/ 00( . ) (86) International application number: PCT/US1987/000016 (87) International publication number: WO 1987/004174 (16.07.1987 Gazette 1987/15)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI NL SE (30) Priority: 10.01.1986 US 19860817659 28.07.1986 US 19860889664 (71) Applicant: THE DOW CHEMICAL COMPANY Midland Michigan 48640-1967 (US)	(72) Inventors: WOLFE, David, Lee Midland, MI 48640 (US) CHANG, Dane Houston, TX 77083 (US) (74) Representative: Raynor, John, et al  W.H. Beck, Greener & Co 7 Stone Buildings Lincoln's Inn London WC2A 3SZ London WC2A 3SZ (GB)