(19)

(11)

EP 0 239 568 A1

(12)

(43) Date of publication: 07.10.1987 Bulletin 1987/41 (21) Application number: 85904906.0 (22) Date of filing: 16.09.1985

(51) International Patent Classification (IPC):  C09K 8/ 62( . ) (86) International application number: PCT/US1985/001765 (87) International publication number: WO 1987/001758 (26.03.1987 Gazette 1987/07)

(84) Designated Contracting States: DE FR GB IT NL (71) Applicant: THE DOW CHEMICAL COMPANY Midland Michigan 48640-1967 (US)	(72) Inventors: CONSTIEN, Vernon, G. Sperry, OK 74073 (US) KING, Milton, T. Tulsa, OK 74129 (US) (74) Representative: Huber, Bernhard, Dipl.-Chem.  Patentanwälte H. Weickmann, Dr. K. Fincke F.A. Weickmann, B. Huber Dr. H. Liska, Dr. J. Prechtel, Dr. B. Böhm Postfach 86 08 20 D-81635 München D-81635 München (DE)