| 摘要 |
PROBLEM TO BE SOLVED: To obtain a composition showing good thermostability and initial discoloration by incorporating hydrotalcite compounds treated with perchloric acid, a stabilizer containing one or more of trimethylol compounds and/or their condensation products and no heavy metal into a polyvinyl chloride resin. SOLUTION: A resin composition comprises 100 pts.wt. of polyvinyl chloride resin; 0.01-5 pts.wt. of hydrotalcite compounds treated with perchloric acid; a predetermined amount of a stabilizer containing 0.01-5 pts.wt. of one or more of trimethylol compounds and/or their condensation products and no heavy metals such as Zn, Cd, Ba, Sn and Pb. The hydrotalcite compounds treated with perchloric acid are lamellar compounds having a composition represented by formula I. The trimethylol compounds are compounds represented by formula II and/or their condensation products including trimethylol propane. In the formulas, X is a positive number not more than 0.33; m is a positive number; and R is an organic residue such as an alkyl group having at least one carbon atom.
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