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:
Jan. 19, 1993
Filed:
Jun. 27, 1991
Masahiro Terada, Kanagawa, JP;
Nobuji Sugimoto, Kanagawa, JP;
Toshiro Watanabe, Kanagawa, JP;
Takashi Sugimoto, Mie, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Mitsubishi Petrochemical Co., Ltd., Tokyo, JP;
Abstract
A large-sized exterior part of an automotive vehicle, injection-molded and formed of a polymer material comprises: (A) polypropylene in an amount ranging from 50 to 70 by weight %, the polypropylene containing ethylene in an amount not more than 15 weight % relative to the polypropylene and having a MFR (at 230.degree. C.) ranging from 5 to 60 g/10 min.; (B) ethylene-propylene copolymer rubber polymerized in the presence of a vanadium-based catalyst, in an amount ranging from 5 to 30 weight %, the copolymer containing propylene in an amount ranging from 20 to 40 weight % relative to the ethylene-propylene copolymer rubber and having a Mooney viscosity ML.sub.1+4 (100.degree. C.) ranging from 20 to 80; (C) ethylene-propylene copolymer rubber polymerized in the presence of a titanium-based catalyst, in an amount ranging from 5 to 45 weight %, the copolymer containing propylene in an amount ranging from 30 to 70 weight % relative to the ethylene-propylene copolymer rubber and having a Mooney viscosity ML.sub.1+4 (100.degree. C.) ranging from 20 to 75; and (D) polyethylene in an amount not more than 10 weight %, the polyethylene having a MFR (at 190.degree. C.) ranging from 5 to 50 g/10 min. The injection-molded article has an average thickness ranging from 2 to 6 mm, a flexural elastic modulus ranging from 3000 to 6000 kg/cm.sup.2, and a coefficient of linear expansion not higher than 8.times.10.sup.-5 /.degree.C.