UNSATURATED POLYESTER RESIN COMPOSITION HAVING LESS COLORATION AND EXCELLENT TRANSPARENCY

摘要

UNSATURATED POLYESTER RESIN COMPOSITION HAVING LESS COLORATION AND EXCELLENT TRANSPARENCY An unsaturated polyester resin composition suitable for an onyx-like artificial marble is obtained by using aluminum hydroxide having an average primary particle size of at least 20 .mu.m or a mixture thereof with aluminum hydroxide pulverized from the above aluminum hydroxide and having an average particle size of at least 15 .mu.m. This composition has an improved transparency, a reduced coloration, and a good productivity.