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. 04, 1995
Filed:
Jun. 10, 1994
Yutaka Toyooka, Otake, JP;
Atsushi Kimura, Otake, JP;
Yasunori Tsuneshige, Yanai, JP;
Katsutoshi Kajimura, Tokyo, JP;
Mitsubishi Rayon Co., Ltd., Tokyo, JP;
Abstract
A maleimide copolymer which consists essentially of greater than 28% by weight and less than or equal to 65% by weight of a maleimide monomer unit, greater than or equal to 16% by weight and less than 72% by weight of at least one monomer unit selected from the group consisting of aromatic vinyl compound monomer units and methacrylate monomer units, and 0-25% by weight of another vinyl compound monomer unit and which contains 0.1% by weight or less of the residual maleimide monomer and 0.5% by weight or less of volatile components other than the maleimide monomer and which has a ratio (Mw/Mn) of a weight average molecular weight Mw to a number average molecular weight Mn of 3 or less, a yellowness index of 30 or less and an intrinsic viscosity of from 0.3 to 1.5. The maleimide copolymer of the present invention is excellent in heat resistance, transparency, chemical resistance, impact resistance, moldability and the like.