| 摘要 |
PROBLEM TO BE SOLVED: To enhance the weatherability and durability of a cooler exterior parts cover, and reduce choking, thermal deformation, and thermal discoloration by molding vinylchloride resin composition containing a specific quantity of a UV ray absorption agent, an organic tin heat-stabilizer and a specific hydrotalcite. SOLUTION: A vinylchloride resin composition for molding a cooler exterior part cover has vinylchloride resin having an average polymerization degree of 400-1300 and chlorination vinylchloride resin having an average polymerization degree of 400-1500 of vinylchloride resin before chlorination as a resin component. The added quantity of UV ray absorption agent is 0.01-1 pts.wt., the added quantity of organic tin heat-stabilizer is 1-3 pts.wt., and the added quantity of hydrotalcite is 1-5 pts.wt. with respect to 100 pts.wt. vinylchloride. Hydrotalcite needs to be a composition shown by formula Mg1-x Alx (OH)2 (CO3 )0.5x .mH2 O and, in the formula, (x) and (m) show numbers of 0<x<0.5 and 0<=m<=2 respectively. |
