PRIMER COMPOSITION FOR HARDLY BONDABLE PLASTIC MATERIAL, BONDING METHOD, AND OPTICAL ENCODER

摘要

PROBLEM TO BE SOLVED: To provide a primer composition that forms a thin primer layer, wherein adhesiveness due to an adhesive agent between the hardly bondable plastic material and an adherend can be improved without degrading a surface of a hardly bondable plastic material.

SOLUTION: The primer composition for hardly bondable plastic material comprises: 0.1-20 mass% of inorganic particles each having an average grain size of ≥2 nm and ≤2 μm; 0.05-10 mass% of a peroxide; and ≥60 mass% of an aqueous vehicle.

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