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Patent Searching and Data


Title:
PRODUCTION OF POLYPROPYLENE COMPOSITION
Document Type and Number:
Japanese Patent JPS59223740
Kind Code:
A
Abstract:

PURPOSE: To produce PP having an excellent low-temperature impact strength and a high crystallization velocity, by mixing a specitied α-olefin/ethylene random copolymer with PP, adding an org. peroxide and a crosslinking aid there to and heat-treating the mixture.

CONSTITUTION: 0.01W1pt.wt. org. peroxide such as dicumyl peroxide and 0.001W 10pts.wt. crosslinking aid such as divinylbenene are mixed with 100pts.wt. compsn. consisting of 55W95pts.wt. PP (A), 1W40pts.wt. α-olefin/ethylene random copolymer (B), pref. one having an α-olefin (e.g. propylene) content of 10W70% and triad isotacticity of less than 0.7 and 1W35pts.wt. PE (C). The mixture is heat-treated at 180W350°C. By adding the copolymer B to PP and further adding the org. peroxide and the crosslinking aid thereto, PP having excellent low-temperature impact strength and a high crystallization velocity can be obtd. without detriment to rigidity, inherent to PP.


Inventors:
Kamiyama, Masaki
Application Number:
JP1983000096895
Publication Date:
December 15, 1984
Filing Date:
June 02, 1983
Export Citation:
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Assignee:
MITSUI PETROCHEM IND LTD
International Classes:
C08L23/00; C08K5/14; C08L7/00; C08L21/00; C08L23/10; C08L23/16; C08L101/00; (IPC1-7): C08L23/10
Domestic Patent References:
1983-01-07
1979-04-03