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. 13, 2021
Filed:
Jun. 20, 2017
Applicant:
Nitto Kasei Co., Ltd., Osaka, JP;
Inventors:
Hiroyuki Kaneshiro, Osaka, JP;
Mika Araki, Osaka, JP;
Assignee:
NITTO KASEI CO., LTD., Osaka, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07F 3/02 (2006.01); C08G 63/83 (2006.01); C08G 63/00 (2006.01);
U.S. Cl.
CPC ...
C07F 3/02 (2013.01); C08G 63/00 (2013.01); C08G 63/83 (2013.01);
Abstract
A catalyst for preparing polyester resins from monobasic or polybasic acids and polyhydric alcohols, comprising a Magnesium compound which has a bonding portion represented by formula —Mg—O—(CR)a-Q, wherein Q is a Nitrogen or Sulfur and a is an integer from 1 to 4, is disclosed. Catalyst may further comprise Titanium compounds, for example titanium alkoxide, wherein titanium diisopropoxy bistriethanolaminate is particularly preferable from the viewpoint of reactivity and coloring property. Catalyst is capable of shortening production time for polyester resins.