(19)

(11)

EP 0 319 572 A1

(12)

(43) Date of publication: 14.06.1989 Bulletin 1989/24 (21) Application number: 88906580.0 (22) Date of filing: 23.06.1988

(51) International Patent Classification (IPC):  G02B 6/ 00( . ) C08L 69/ 00( . ) C08G 63/ 64( . ) D01F 8/ 16( . ) (86) International application number: PCT/US1988/002128 (87) International publication number: WO 1988/010438 (29.12.1988 Gazette 1988/28)

(84) Designated Contracting States: BE DE FR GB IT NL SE (30) Priority: 24.06.1987 US 19870065973 (71) Applicant: THE DOW CHEMICAL COMPANY Midland Michigan 48640-1967 (US)	(72) Inventors: PARKER, Theodore, L. Lafayette, CA 94549 (US) PEDERSEN, David, R. Clayton, CA 94517 (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)