(19)

(11)

EP 0 579 644 A1

(12)

(43) Date of publication: 26.01.1994 Bulletin 1994/04 (21) Application number: 92907659.0 (22) Date of filing: 13.04.1992

(51) International Patent Classification (IPC):  C08G 64/ 00( . ) C08G 64/ 42( . ) H05K 1/ 02( . ) C08G 64/ 02( . ) C09D 169/ 00( . ) H05K 3/ 28( . ) (86) International application number: PCT/GB1992/000662 (87) International publication number: WO 1992/019088 (29.10.1992 Gazette 1992/27)

(84) Designated Contracting States: AT DE FR GB IT (30) Priority: 12.04.1991 GB 19910007859 (71) Applicant: COOKSON GROUP plc London EC2V 6EQ (GB)	(72) Inventors: CAMPBELL, John, Stewart Hambleton Camp Road Buckinghamshire SL9 7PG (GB) PANG, Pak, Keung Bath, Avon, BA14BF (GB) KING, Charles, Edmund 39 Hazel Crescent Oxon OX5 1EH (GB) MACKIE, Andrew, Christopher Madison, New Jersey 07940 (US) (74) Representative: Allard, Susan Joyce  BOULT, WADE & TENNANT 27 Furnival Street London EC4A 1PQ London EC4A 1PQ (GB)