(19)

(11)

EP 0 046 753 A1

(12)

(43) Date of publication: 10.03.1982 Bulletin 1982/10 (21) Application number: 80901675.0 (22) Date of filing: 27.02.1980

(51) International Patent Classification (IPC):  B02C 17/ 04( . ) B02C 17/ 22( . ) (86) International application number: PCT/US1980/000198 (87) International publication number: WO 1981/002396 (03.09.1981 Gazette 1981/21)

(84) Designated Contracting States: DE FR GB NL SE (71) Applicant: M.A. HANNA COMPANY Cleveland, Ohio 44114-1860 (US)	(72) Inventors: JARDINE, Colin D. Labrador City, Newfoundland, A2V 2L8 (CA) CHONG, Sooit N.E. Cleveland, OH 44114 (US) COLES, Rodney H. Labrador City, Newfoundland A2V 2L8 (CA) HEBB, Stephen Labrador City, Newfoundland A2V 2L8 (CA) (74) Representative: Topps, Ronald  D. Young & Co 21 London Road Southampton SO1 2AD Southampton SO1 2AD (GB)