| 摘要 |
PROBLEM TO BE SOLVED: To produce a highly transparent polypropylene sheet having properties of markedly improved transparency and moldability and excellent in stiffness, heat resistance, chemical resistance by compounding specific three kinds of chemicals to crystalline polypropylene and forming a sheet. SOLUTION: This sheet is produced by forming the composition composed of (A) 100 pts.wt. of crystalline polypropylene, (B) 0.01-5 pts. of a compound selected from the group consisting of an alkali metal carboxylate, an alkali metalβ-ketonate and aβ-ketoacetic ester alkali metal salt (preferably a Li 8-20C aliphatic monocarboxylate), (C) 0.01-5 pts. of a cyclic organic phosphoric ester basic polyvalent metal salt of formula I [R1 is H, a 1-4C alkyl; R2 and R3 are each H, a 1-12C alkyl; M is a metal atom of III and IV group in the periodic table; X is HO- when M is a III group metal, X is O= or (HO)2 - when M is a IV group metal] and (D) 0.02-0.1 pt. of a lithium aluminum double hydroxide salt compound of formula II (X is an anion; n is valence number of X; M<=3).
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