(19)

(11)

EP 0 564 517 A1

(12)

(43) Date of publication: 13.10.1993 Bulletin 1993/41 (21) Application number: 92901714.0 (22) Date of filing: 17.12.1991

(51) International Patent Classification (IPC):  C08G 61/ 00( . ) C08G 64/ 14( . ) C08G 64/ 00( . ) (86) International application number: PCT/US1991/009325 (87) International publication number: WO 1992/011309 (09.07.1992 Gazette 1992/17)

(84) Designated Contracting States: DE FR GB IT NL (30) Priority: 24.12.1990 US 19900633740 (71) Applicant: THE DOW CHEMICAL COMPANY Midland, Michigan 48640 (US)	(72) Inventors: MARKS, Maurice, J. Lake Jackson, TX 77566 (US) SCHROCK, Alan, K. Lake Jackson, TX 77566 (US) NEWMAN, Thomas, H. Midland, MI 48642 (US) (74) Representative: Casalonga, Axel, et al  BUREAU D.A. CASALONGA - JOSSE Morassistrasse 8 D-80469 München D-80469 München (DE)