(19)

(11)

EP 0 862 561 A2

(12)

(43) Date of publication: 09.09.1998 Bulletin 1998/37 (21) Application number: 96934055.0 (22) Date of filing: 04.10.1996

(51) International Patent Classification (IPC):  C07D 249/ 20( . ) C08K 5/ 3475( . ) C08G 61/ 02( . ) (86) International application number: PCT/US1996/015955 (87) International publication number: WO 1997/012882 (10.04.1997 Gazette 1997/16)

(84) Designated Contracting States: DE FR GB IT (30) Priority: 06.10.1995 US 19950605007 19.01.1996 US 19960659295 (71) Applicant: HOECHST CELANESE CORPORATION Somerville, New Jersey 08876 (US)

(72) Inventors: DILLON, Maria, Pablita Corpus Christi, TX 78411 (US) FRUCHEY, Olan, Stanley Corpus Christi, TX 78410 (US) SOUNIK, James, Ralph Corpus Christi, TX 78414 (US) VICARI, Richard Corpus Christi, TX 78413 (US) WILKISON, William, Wilson Richardson, TX 75081 (US) (74) Representative: De Minvielle-Devaux, Ian Benedict Peter, et al  CARPMAELS & RANSFORD 43, Bloomsbury Square London WC1A 2RA London WC1A 2RA (GB)