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Patent Searching and Data


Title:
FOAMING POLYPROPYLENE RESIN COMPOSITION
Document Type and Number:
Japanese Patent JPS5968340
Kind Code:
A
Abstract:

PURPOSE: To provide the titled resin compsn. which gives highly expanded foams which have a uniform, fine cell structure and excellent cushioning characteristics and resistance to chemicals and heat, and are substantially not crosslinked, by incorporating a blowing agent in a mixture of a polypropylene resin and a petroleum resin.

CONSTITUTION: 60W95wt% polypropylene resin, pref. ethylene/propylene/butene-1 random copolymer and 5W40wt% aliph. petroleum resin (e.g. Hiretz, a product of Mitsui Sekiyu Kagaku K.K.) and/or alicyclic petroleum resin (e.g. Alkon, a product of Arakawa Kagaku Kogyo K.K.) are kneaded together in an extruder. The resuting mixed resin particles are placed in a closed container and a blowing agent such as butane or trichlorofluoromethane is introduced thereinto to incorporate said agent in said resin particles, thus obtaining foaming propylene resin compsn.


Inventors:
FUJIE AKIRA
SHINKAI SABUROU
Application Number:
JP17907482A
Publication Date:
April 18, 1984
Filing Date:
October 14, 1982
Export Citation:
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Assignee:
ASAHI CHEMICAL IND
International Classes:
C08J9/04; C08J9/16; C08L23/10; C08L57/02; (IPC1-7): C08J9/04
Attorney, Agent or Firm:
Kazuo Watanabe