(19)

(11)

EP 0 560 923 A1

(12)

(43) Date of publication: 22.09.1993 Bulletin 1993/38 (21) Application number: 92902611.0 (22) Date of filing: 06.12.1991

(51) International Patent Classification (IPC):  B29C 55/ 02( . ) B29D 7/ 01( . ) C08G 75/ 00( . ) C08J 5/ 18( . ) B29K 81/ 00( . ) B29C 55/ 08( . ) C08G 73/ 22( . ) C08J 3/ 02( . ) B29K 79/ 00( . ) B29L 7/ 00( . ) (86) International application number: PCT/US1991/009228 (87) International publication number: WO 1992/010527 (25.06.1992 Gazette 1992/14)

(84) Designated Contracting States: AT BE DE DK FR GB IT LU MC NL SE (30) Priority: 07.12.1990 US 19900624164 15.03.1991 US 19910670135 (71) Applicant: THE DOW CHEMICAL COMPANY Midland, Michigan 48640 (US)

(72) Inventors: PIERINI, Peter, E. Berkeley, CA 94705 (US) VERMEULEN, Robbert, M. Concord, CA 94521 (US) DOLLINGER, Susan, E. Granville, OH 43023 (US) WESSLING, Ritchie, A. Berkeley, CA 94707 (US) KIM, Peter, K. Danville, CA 94506 (US) (74) Representative: Sternagel, Hans-Günther, Dr., et al  Patentanwälte Dr. Michael Hann, Dr. H.-G. Sternagel, Dr. H. Dörries, Sander Aue 30 D-51465 Bergisch Gladbach D-51465 Bergisch Gladbach (DE)