EP600117-A1  DATABASE WPI Derwent Publications Ltd., London, GB AN 76-00990X & JP-A-50 112 494 (TAKEDA M) 3 September 1975;  DATABASE WPI Derwent Publications Ltd., London, GB; AN 90-087441 & JP-A-2 040 867 (NIPPON OIL KK) 9 February 1990;  PATENT ABSTRACTS OF JAPAN vol. 14, no. 236 (C-720)(4179) 18 May 1990 & JP-A-26 0 925 ( SHIN ETSU CHEM . CO. LTD.) 1 March 1990;  DATABASE WPI Derwent Publications Ltd., London, GB; AN 93-031719(04) & JP-A-4 359 051 (SUMITOMO CHEM. CO. LTD.) 11 December 1992;  DATABASE WPI Derwent Publications Ltd., London, GB; AN 76-00990X & JP-A-50 112 494 (TAKEDA M) 3 September 1975;  PATENT ABSTRACTS OF JAPAN vol. 14, no. 236 (C-720)(4179) 18 May 1990 & JP-A-26 0 925 ( SHIN ETSU CHEM . CO. LTD. ) 1 March 1990;  PATENT ABSTRACTS OF JAPAN vol. 14, no. 236 (C-720)(4179) 18 May 1990&JP-A-26 0 925 ( SHIN ETSU CHEM . CO. LTD. ) 1 March 1990;  DATABASE WPI Derwent Publications Ltd., London, GB; AN 90-087441&JP-A-2 040 867 (NIPPON OIL KK) 9 February 1990;  DATABASE WPI Derwent Publications Ltd., London, GB; AN 76-00990X&JP-A-50 112 494 (TAKEDA M) 3 September 1975;  DATABASE WPI Derwent Publications Ltd., London, GB; AN 93-031719(04)&JP-A-4 359 051 (SUMITOMO CHEM. CO. LTD.) 11 December 1992US5424150-A  Database WPI, Derwent Publications Ltd., AN 76-00990X, JP-A-50 112 494, 03091975;  Database WPI, Derwent Publications Ltd., AN 90-087441, JP-A-2 040 867, 09021990;  Database WPI, Derwent Publications Ltd., AN 93-031719(04), JP-A-4 359 051, 11121992;  Journal of Polymer Science, Polymer Physics Edition, vol. 17, 645-654, 1979;  Kobunshi Ronbunshu, vol. 36, No. 7, pp. 489-494, 1979. (An English-language Abstract is attached);  Patent Abstracts of Japan, vol. 14, No. 236, 18051990, JP-A-26 0 925;  Polymers for Advanced Technologies, vol. 2, pp. 213-217, 1991EP600117-B1  DATABASE WPI Derwent Publications Ltd., London, GB; AN 76-00990X;  DATABASE WPI Derwent Publications Ltd., London, GB; AN 90-087441;  DATABASE WPI Derwent Publications Ltd., London, GB; AN 93-031719(04);  PATENT ABSTRACTS OF JAPAN vol. 14, no. 236 (C-720)(4179) 18 May 1990