| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain a resin paste excellent in low staining properties by including a urethane acrylate resin or a urethane methacrylate resin, an acrylic resin or a methacrylic resin, an organic peroxide and an inorganic filler in a specified ratio. SOLUTION: This paste contains 100 pts.wt. urethane acrylate resin or urethane methacrylate resin represented by formula I or II, 50-200 pts.wt. acrylic resin or methacrylic resin represented by formula III, 0.1-50 pts.wt. organic peroxide such as 1,1,3,3-tetramethylbutyl peroxy-2-ethylhexanoate and 50-1,200 pts.wt. inorganic filler (e.g. silica) having a particle diameter of 50μm or below. The urethane acrylate resin or the like has low elasticity and is obtained by reacting a reaction product of polypropylene glycol with isophorone diisocyanate with hydroxyethyl acrylate or the like. In the formulae, R1 and R2 are each CH3 or H; and (m) and (n) are integers.</p> |
