Kaneka Corporation

Yu Itano

Toshihiko Okamoto

Katsuyu Wakabayashi

Kiyoshi Miyafuji

Tatsuro Harumashi

Wendy Smits

A curable composition includes an organic polymer containing a reactive silicon group (A), and a bound substance of kaolinite and quartz (B) at a proportion of 30-200 parts by weight relative to 100 parts by weight of the organic polymer containing a reactive silicon group (A).

Curable composition

A curable composition includes organic polymer (A) having more than one reactive silicon group on average per molecule, represented by formula (1): &#x2014;SiRX(1), wherein Ris a substituted or unsubstituted hydrocarbon group having 1-20 carbon atoms, each X is independently a hydroxy group or a hydrolyzable group, and a is 0 or 1, and (meth)acrylate-based polymer (B) having a reactive silicon group represented by formula (2): &#x2014;SiX(2), wherein each X is as defined for the formula (1), polymer (B) has a reactive silicon group equivalent of not less than 0.30 mmol/g, and wherein a monomer (b1) is free of a reactive silicon group, a glass transition temperature of its homopolymer is not more than 80&#xb0; C., and is contained as monomer(s) constituting polymer (B) in a proportion of not less than 40 wt % per 100 wt % of total monomer.

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Hyogo, Japan

Yu Itano