| 摘要 |
PROBLEM TO BE SOLVED: To obtain the subject composition excellent in gas barrier properties, waterproof properties and adhesion to a base material by including a swellable layered silicate, and a compound having an acidic group and a polymerizable group in the molecule. SOLUTION: This composition comprises (A) a swellable layered silicate (e.g. a two-dimensionally crystalline layered sodium silicate such as montmorillonite, beidellite and hectorite), and (B) a compound having an acidic group and a polymerizable group in the molecule [e.g. (meth)acrylic acid, 4-(meth)acryloxyethyl trimellitate, and allyl phosphate]. The component B of 5-30 pts.wt. based on 100 pts.wt. of the component A is preferably included in the composition. (C) A polymerizable monomer containing no acidic group in the molecule (e.g. styrene) of 30-300 pts.wt. based on 100 pts.wt. of the component B is preferably added to the composition to improve the adhesion of the composition to a base material, and the gas barrier properties under a high humidity condition.
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