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:
Apr. 07, 2020
Filed:
Jun. 30, 2018
Applicant:
Kraton Polymers Llc, Houston, TX (US);
Inventor:
Mark C. Schaapman, Almere, NL;
Assignee:
Kraton Polymers LLC, Houston, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09F 1/04 (2006.01); C09J 193/04 (2006.01); C09F 1/02 (2006.01); C08L 93/04 (2006.01);
U.S. Cl.
CPC ...
C09F 1/04 (2013.01); C08L 93/04 (2013.01); C09F 1/02 (2013.01); C09J 193/04 (2013.01);
Abstract
A light color or a low color rosin or a rosin ester composition is disclosed. Significant color improvement can be obtained for a low color rosin, or a rosin ester by using a co-catalyst. In one embodiment, the co-catalyst has a triplet formation quantum yield (ϕ) of greater than 0.5 and a triplet lifetime (τ) of greater than 0.5 microseconds In another embodiment, the co-catalyst is selected from acridone, anthrone, 9-fluorenone, thioxanthone, xanthone, derivatives and combinations thereof.