COMPOSITION FOR (METH)ACRYLIC RESIN CAST PLATE, (METH)ACRYLIC RESIN CAST PLATE PRODUCED BY CAST-POLYMERIZING THE COMPOSITION AND METHOD FOR PRODUCING (METH)ACRYLIC RESIN CAST PLATE BY CAST-POLYMERIZING THE COMPOSITION

摘要

PROBLEM TO BE SOLVED: To provide a composition that can produce a (meth)acrylic resin cast plate having excellent heat resistance while maintaining transparency and having good impact resistance while retaining a high elastic modulus, to provide a (meth)acrylic resin cast plate produced by cast-polymerizing the composition and to provide a method for producing a (meth)acrylic resin cast plate by cast-polymerizing the composition.SOLUTION: The (meth)acrylic resin cast plate is produced by cast-polymerizing a composition having the following composition: the composition for a (meth)acrylic resin cast plate containing 1 to 99 mass% of (A) a mono(meth)acrylate, 99 to 1 mass% of (B) a di(meth)acrylate represented by formula (1) as given below, and 0.05 to 2 pts.mass, based on 100 pts.mass of the total of the mono(meth)acrylate (A) and the di(meth)acrylate (B), of (C) a thermoplastic polymer as given below. Formula (1) is CH=CR-COO-(X)-COCR=CH(provided that (X) has a number average molecular weight of 500 or more and is at least one kind of residue selected from CHO, CHO and CHO; and Rrepresents H or CH). The thermoplastic polymer (C) is a thermoplastic polymer comprising 50 to 100 mass% of a methyl metacrylate and 0 to 50 mass% of at least one kind of other vinyl monomers copolymerizable therewith and having a mass average molecular weight of 500,000 to 5,000,000.