| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a primer composition useful for a sealing material for buildings especially for a porous building material such as a ceramic-based or wood-based siding board, which is a primer composition for a sealing material for buildings having excellent barrier properties, adhesion durability, wet surface adhesiveness, workability and storage stability.SOLUTION: There is provided a primer composition for a sealing material for buildings which comprises an acrylic resin (A) and an urethane-based resin (B), wherein the urethane-based resin (B) contains (B1) a reaction product of an acryl polyol with a polyisocyanate compound and (B2) a reaction product of a butadiene polyol with a polyisocyanate compound.</p> |
