| 摘要 |
PURPOSE:To improve transparency, surface smoothness and surface hardness by incorporating glass powders of different specified particle sizes into unsatd. polyester resin. CONSTITUTION:This resin compsn. is obtd. by blending 100 pts.wt. unsatd. polyester resin (A) consisting of 50-80wt.% unsatd. polyester and 50-20wt.% polymerizable monomer such as styrene with 150-400 pts.wt. glass powder (B) consisting of 95-70wt.% glass powder of <=10mum average particle size and 5-30wt.%, in total, of 75-92wt.% glass powder of 30-40mum average particle size and 25-8wt.% glass powder of 60-80mum average particle size and a curing agent (C) such as t-butyl perbenzoate or by further adding a reinforcing agent, a shrinkage reducing agent, a curing accelerator, an internal releasing agent, a thickener, a colorant, etc., (D) as required. |
