| 摘要 |
A polypropylene resin composition comprising (a) 100 parts by weight of a propylene polymer having an isotactic pentad fraction of 96% or more which is determined by 13C-NMR, (b) 0.01-5 parts by weight of at least one alkali salt selected from the group consisting of alkali carboxylates, alkali beta -diketonates and alkali salts of beta -ketacetate, (c) 0.01-5 parts by weight of an organophosphoric compound, and (d) 0.01-0.5 parts by weight of a lithium aluminum compound. The organophosphoric compound is represented by the following formula (I): <IMAGE> (I) wherein R1 is hydrogen or an alkyl group having 1 to 4 carbon atoms, each of R2 and R3 is independently hydrogen or an alkyl group having 1 to 12 carbon atoms, M is a metal atom of an element selected from the group consisting of Group III, IV, XIII and XIV elements of the Periodic Table, and X is -OH when M is a metal atom of an element of Group III or XIII of the Periodic Table or X is =O or (-OH)2 when M is a metal atom of an element of Group IV or XIV of the Periodic Table, and the lithium aluminum compound is represented by the following formula (II):[Al2Li(OH)6]n Y.mH2O (II)wherein Y is an inorganic or organic anion, n is a charge of Y and m is a number of 3 or less.
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