THERMOSETTING RESIN COMPOSITION HAVING LOW SHRINKAGE

摘要

PURPOSE:To obtain the titled composition having excellent storage stability and giving a cured product having low cure-shrinkage and excellent surface smoothness and luster without staining the mold nor causing mottling of the product, by compounding a specific hydroxyl-containing (meth)acrylate polymer with a thermosetting resin. CONSTITUTION:The objective composition can be produced by compounding (A) a hydroxyl-containing (meth)acrylate polymer produced by polymerizing a hydroxyl-containing (meth)acrylate oligomer of formula (R is H or methyl; Z is 2-20C bivalent organic group; n is 1-100) and optionally a monomer copolymerizable with said oligomer and (B) a thermosetting resin. The content of the oligomer in the component A is 5-90(wt)% and the amount of the component A is 1-40%, preferably 2-30% of the sum of the components A and B.