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:
Feb. 07, 2023
Filed:
Dec. 21, 2020
Kraton Polymers Llc, Houston, TX (US);
KRATON POLYMERS LLC, Houston, TX (US);
Abstract
Disclosed are compositions comprising dimeric decarboxylated rosins (DDCRs), methods for making them, and applications thereof. DDCR of purity from 50-100 wt. % is obtained by decarboxylating a dimeric rosin acid or by dimerizing a decarboxylated rosin, in the presence of a catalyst, followed by one or more purification steps separation on differences in boiling point. The isolated DDCR fractions display unexpectedly high T/Mratios, softening points and viscosities, and low polydispersities. The DDCR product comprises 50 to 100 wt. % of polycyclic hydrocarbon compounds having one or more aliphatic, unsaturated or aromatic groups, and 34-80 carbon atoms, with a molecular weight Mof 250-900 Da, and an oxygen to carbon ratio of <5%. The DDCR product has at least 50%, and up to 100% as dimeric species, with the remainder being trimeric and larger polymeric species.