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:
Sep. 07, 2021
Filed:
Apr. 01, 2020
Kraton Polymers Llc, Houston, TX (US);
Mark Schaapman, Almere, NL;
Kraton Polymers LLC, Houston, TX (US);
Abstract
The disclosure relates to a light color or a low color rosin or a rosin ester composition. The rosin ester comprises a reaction product of one or more rosins, one or more polyhydric alcohols, and optionally one or more monocarboxylic acids, and optionally one or more polycarboxylic acids having from 2 to 54 carbon atoms; from 0 ppm to 200 ppm of a co-catalyst, and optionally, a disproportionation catalyst, an esterification catalyst, or combinations thereof. 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. Methods to prepare the rosin ester compositions and uses of the compositions are also disclosed.