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:
Jul. 30, 2013
Filed:
Apr. 09, 2009
Atsuhiro Nakahara, Okayama, JP;
Jin Tokuyasu, Ibaraki, JP;
Takashi Hori, Okayama, JP;
Hiroyuki Ohgi, Okayama, JP;
Atsuhiro Nakahara, Okayama, JP;
Jin Tokuyasu, Ibaraki, JP;
Takashi Hori, Okayama, JP;
Hiroyuki Ohgi, Okayama, JP;
Kuraray Co., Ltd., Kurashiki-shi, JP;
Abstract
The present invention provides hydrogenated β-pinene-based polymers with excellent heat resistance and light resistance, low absorptivity and high transparency, as well as molded articles thereof. The polymers of the present invention contain 50% by mass or more of β-pinene units and are hydrogenated β-pinene-based polymers where the ratio of the proton integral value at 6 to 8 ppm to the total proton integral value in aH-NMR spectrum is 2.3×10or less or the p-phenylene group content is 0.0055% by mass or less, and the ratio of the proton integral value at 4.5 to 6 ppm to the total proton integral value is 2.8×10or less or the cyclohexene-1,4-diyl group content is 0.29% by mass or less. The molded articles of the present invention contain the above hydrogenated β-pinene-based polymers.