CURABLE COMPOSITION AND OPTICAL MATERIAL PREPARED THEREFROM

WIPO Patent Application WO/1998/037114

A1

A curable composition comprising 5 to 90 % by weight of at least one mercapto compound selected from the group consisting of tetrakis(7-mercapto-2,5-dithiaheptyl)methane represented by the structural formula (I): C(CH�2?SCH�2?CH�2?SCH�2?CH�2?SH)�4? and 2,3-bis[(2-mercaptoethyl)thioethylthio]-1-propanethiol of structural formula (II), and 10 to 95 % by weight of a compound copolymerizable with the mercapto compound. The curable composition is capable of forming a resin having an excellent handleability, a high refractive index and a low specific gravity and so is suitable for use as an optical material or the like.

WO/2000/036020	EXTENDED POLYMETHYLENE POLY(PHENYLISOCYANATE) RESIN BINDERS FOR THE PRODUCTION OF WOOD COMPOSITE PRODUCTS
JP7219743	Polishing pad, method for manufacturing same, and method for manufacturing semiconductor element using same

SHIMADA KOUJI (JP)
YAMAMOTO KATSUMASA (JP)
SUZUKI MICHIO (JP)
OGIHARA TAKEO (JP)
ICHIKAWA YUKIO (JP)

PCT/JP1998/000643

August 27, 1998

February 16, 1998

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SUMITOMO SEIKA CHEMICALS (JP)
SHIMADA KOUJI (JP)
YAMAMOTO KATSUMASA (JP)
SUZUKI MICHIO (JP)
OGIHARA TAKEO (JP)
ICHIKAWA YUKIO (JP)

C08G18/38; C08G59/66; C08G75/04; C08G75/06; (IPC1-7): C08G18/38; C08G59/66; C08G75/04; C08G75/06; G02B1/04

JPH09263575A	1997-10-07
JPH09286772A	1997-11-04
JPH02270859A	1990-11-05
JPH0236216A	1990-02-06
JPH03138601A	1991-06-13
JPH07252207A	1995-10-03

Hosoda, Yoshinori (Otemae M2 Building 8-1, Tanimachi 2-chome, Chuo-k, Osaka-chi Osaka, JP)

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