PURPOSE: To obtain a high-rigidity molding by mixing a propylene resin with an amide compound represented by a specific formula, melt-kneading the mixture at or above the temp. at which the compound begins to dissolve in a melt of the resin, cooling the mixture, and molding the resulting composition at a given temp.
CONSTITUTION: 100 pts.wt. propylene resin comprising a propylene (co)polymer is mixed with 0.001-10 pts.wt. at least one amide compound represented by the formula, R2-NHCO-R1-CONH-R3, R2-CONH-R2-CONH-R3, or R2-CONH-R2- NHCO-R3 (wherein R1 is a 1-28C aliphatic, alicyclic, or aromatic hydrocarbon group, and R2 and R3 each is a 3-18C cycloalkyl, cycloalkenyl, etc.), e.g. N,N'- dicyclohexy1-2, 6-naphthalenedicarboxamide. The mixture is melt-kneaded at or above the temp. (a) at which the compound begins to dissolve in a melt of the resin, and then cooled. The obtained molding material is molded at a temp. lower than the temp. (a) to obtain a high-rigidity propylene resin composition.
YOKOYAMA MASANOBU
UEHARA YUMITO
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