(19)

(11)

EP 0 215 060 A1

(12)

(43) Date of publication: 25.03.1987 Bulletin 1987/13 (21) Application number: 86901658.0 (22) Date of filing: 19.02.1986

(51) International Patent Classification (IPC):  C04B 28/ 16( . ) C04B 28/ 06( . ) C04B 24/ 26( . ) (86) International application number: PCT/US1986/000348 (87) International publication number: WO 1986/004889 (28.08.1986 Gazette 1986/19)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 19.02.1985 US 19850702541 (71) Applicant: CONSTRUCTION PRODUCTS RESEARCH INC., Fairfield Connecticut 06430 (US)	(72) Inventors: BABCOCK, Warner, K. Stamford, CT 06903 (US) RUEFENACHT, David New Canaan, CT 06840 (US) (74) Representative: Szczuka, Jan Tymoteusz, et al  Cruikshank & Fairweather 19 Royal Exchange Square Glasgow G1 3AE Scotland Glasgow G1 3AE Scotland (GB)