PROCESS FOR PRODUCING FUNCTIONAL COLLOIDAL SILICA SOLUTION, ULTRAVIOLET-CURABLE RESIN COMPOSITION FOR HARD COATS USING SAME, AND CURED PRODUCT THEREOF

WIPO Patent Application WO/2012/105297

A1

The present invention provides a process for producing a functional colloidal silica capable of yielding a ultraviolet-curable hard coat material which combines hardness and low cure shrinkage and which ensures excellent scratch resistance, tight adhesion and economical efficiency. A process for producing a functional colloidal silica solution which is obtained by subjecting (A) 100 parts by weight (in terms of silica) of a water-dispersible colloidal silica that has a mean particle diameter of 1 to 30nm and a hydrogen ion concentration (pH) of 6 or less, (B) 20 to 30 parts by weight of a methacryloxy-containing alkoxysilane and (C) 50 to 500 parts by weight of a polar solvent having a dielectric constant of 10 or more to hydrolysis in the presence of (D) 0.001 to 1 part by weight of (D) a radical polymerization inhibitor, and then subjecting the resulting system to azeotropic dehydration/ solvent displacement using (E) 1-methoxy-2-propanol and which exhibits a mean particle diameter of 1 to 30nm and an at most 1.5-fold difference in the mean particle diameter of the silica between before and after the hydrolysis.

YAMATO TOSHIO (JP)

PCT/JP2012/050661

August 09, 2012

January 16, 2012

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MOMENTIVE PERFORMANCE MAT JP (JP)
YAMATO TOSHIO (JP)

C08G77/20; C08F290/06; C09C1/28; C09C3/12; C09D4/02

WO2010098481A1	2010-09-02
WO2009028741A1	2009-03-05
WO1997011129A1	1997-03-27
WO2010058754A1	2010-05-27

JP2008150484A	2008-07-03
JP2007070449A	2007-03-22
JPH06100797A	1994-04-12
JP2007145965A	2007-06-14
JP2011012145A	2011-01-20
JP2009091448A	2009-04-30

FURUYA Satoshi et al. (JP)
Satoshi Furuya (JP)

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