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:
Feb. 27, 1996
Filed:
Jan. 27, 1994
Mitsui Petrochemical Industries, Ltd., Tokyo, JP;
Abstract
There is provided a cycloolefin polymer composition comprising 8 to 40% by weight of a cycloolefin polymer [A] and 92 to 60% by weight of a cycloolefin polymer [B], both having specific properties, wherein a difference .DELTA.n.sub.D =.vertline.n.sub.D (A)-n.sub.D (B).vertline. between the refractive index n.sub.D (A) of the polymer [A] and the refractive index n.sub.D (B) of the polymer [B] is not more than 0.015. This composition is excellent in impact resistance, transparency and heat resistance, and has a good balance of these properties. There is also provided a cycloolefin copolymer composition comprising 8 to 40% by weight of a cycloolefin elastomer component [Aa] of an .alpha.-olefin, a specific cycloolefin and a non-conjugated diene which contains a polymerizable carbon-carbon double bond; and 92 to 60% by weight of a cycloolefin copolymer component [Ba] which is obtained by copolymerizing an .alpha.-olefin and a specific cycloolefin in the presence of the elastomer component [Aa]; wherein a difference .DELTA.n.sub.D =.vertline.n.sub.D (A)-n.sub.D (B).vertline. between the refractive index n.sub.D (Aa) of the component [Aa] and the refractive index n.sub.D (Ba) of the component [Ba] is not more than 0.015. This composition has excellent properties inherent in a cycloolefin random copolymer and is improved especially in impact resistance without tranding off its transparency. There is also provided a cycloolefin copolymer composition comprising 8 to 40% by weight of a cycloolefin elastomer component [A.alpha.] of an .alpha.-olefin and a specific cycloolefin which substantially contains no polymerizable carbon-carbon double bond; and 92 to 60% by weight of a cycloolefin copolymer component [B.alpha.] which is obtained by copolymerizing an .alpha.-olefin and a specific cycloolefin in the presence of the elastomer component [A.alpha.]; wherein a difference .DELTA.n.sub.D =.vertline.n.sub.D (A)-n.sub.D (B).vertline. between the refractive index n.sub.D (A.alpha.) of the component [A.alpha.] and the refractive index n.sub.D (B.alpha.) of the component [B.alpha.] is not more than 0.015. This composition has also excellent properties inherent in a cycloolefin random copolymer and is improved particularly in impact resistance without trading off its transparency.