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. 22, 2011
Filed:
Nov. 24, 2005
Wilfried Hatke, Kelkheim, DE;
Matthias Bruch, Moerfelden-Walldorf, DE;
Anne-meike Schauwienold, Hofheim, DE;
Udo Manfred Stehling, Koenigstein im Taunus, DE;
Hiroyuki Kanai, Shizuoka, JP;
Hajime Serizawa, Shizuoka, JP;
Hiroshi Hiraike, Osaka, JP;
Takahiko Sawada, Osaka, JP;
Kazunari Yagi, Osaka, JP;
Isao Higuchi, Osaka, JP;
Katsunori Toyoshima, Osaka, JP;
Takeharu Morita, Osaka, JP;
Wilfried Hatke, Kelkheim, DE;
Matthias Bruch, Moerfelden-Walldorf, DE;
Anne-Meike Schauwienold, Hofheim, DE;
Udo Manfred Stehling, Koenigstein im Taunus, DE;
Hiroyuki Kanai, Shizuoka, JP;
Hajime Serizawa, Shizuoka, JP;
Hiroshi Hiraike, Osaka, JP;
Takahiko Sawada, Osaka, JP;
Kazunari Yagi, Osaka, JP;
Isao Higuchi, Osaka, JP;
Katsunori Toyoshima, Osaka, JP;
Takeharu Morita, Osaka, JP;
Polypastics Co., Ltd., Tokyo, JP;
Topas Advanced Polymers GmbH, Frankfurt am Main, unknown;
Abstract
A novel cycloolefin copolymer that can be employed in the production of molding with fewer defects, for example, fewer gel particles (fish eyes). There is provided a cycloolefin copolymer comprising 80 to 20 mol % of repeating units derived from an α-olefin monomer and 20 to 80 mol % of repeating units derived from at least one cycloolefin monomer selected from the group consisting of monomer of the general formula (I), monomer of the general formula (II), monomer of the general formula (III), monomer of the general formula (IV) and monomer of the general formula (V), wherein with respect to the repeating units derived from cycloolefin monomer, the proportion thereof being present in the form of dimer (Rd) is 50 mol % or below and the proportion thereof being present in the form of trimer (Rt) 5 mol % or above.