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. 19, 2013
Filed:
Nov. 18, 2010
Nobuo Kawato, Kureme, JP;
Masanori Iwazumi, Irvine, CA (US);
Hidetoshi Hayashi, Omuta, JP;
Seiichi Kobayashi, Omuta, JP;
Nobuo Kawato, Kureme, JP;
Masanori Iwazumi, Irvine, CA (US);
Hidetoshi Hayashi, Omuta, JP;
Seiichi Kobayashi, Omuta, JP;
Mitsui Chemicals, Inc., Minato-ku, Tokyo, JP;
Abstract
By using an amine hydrochloride represented by the formula (1) as a catalyst, a polythiourethane resin which is suitably used for a transparent resin for optical use, can be obtained without using an organotin compound which has been conventionally used as a catalyst for polythiourethane resins and without being affected by the acidity of an additive: wherein R, Rand Rindependently represent a monovalent or higher valent linear aliphatic, branched aliphatic, cyclic aliphatic or aromatic organic residue which may have a hydroxyl group or an amino group; and R, Rand Rmay be arbitrarily bonded to each other to form a ring.