The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 27, 2012
Filed:
Sep. 19, 2008
Tatsuji Kawamura, Ichihara, JP;
Yukio Ishii, Chiba, JP;
Ikunori Sakai, Ichihara, JP;
Prime Polymer Co., Ltd., Tokyo, JP;
Abstract
Foaming polypropylene resin compositions are excellent in balance between melt tension and flowability, can give injection-molded foams having superior mechanical strength such as impact resistance, and are suited for the production of automobile parts or the like. Processes of the invention produce injection-molded foams from the compositions. A foaming polypropylene resin composition according to the present invention includes a polypropylene resin (A) and an ethylene/α-olefin having 3-10 carbon atoms copolymer (B) in a specific ratio; the ethylene/α-olefin having 3-10-carbon atoms copolymer (B) includes a higher molecular weight component (B-H) having MFRof 1 to 10 g/10 min and a lower molecular weight component (B-L) having MFRof 20 to 50 g/10 min; and the weight ratio between (B-H) and (B-L), (B-H):(B-L), is in the range of 6:4 to 2:8.