Patent 2017200069

COMPOSITIONS CONTAINING PURIFIED NON-HEVEA RUBBER AND RELATED PURIFICATION METHODS

Abstract

ABSTRACT A process for isolating purified natural rubber from non-Hevea plant matter according to the present invention comprises providing harvested plant matter comprising at least 90% by weight of roots sourced from Taraxacum kok-saghyz, Scorzonera tau-saghyz, Scorzonera uzbekistanica, and combinations thereof, wherein the harvested plant matter has been subjected to at least one of chopping, grinding, milling and masticating. This harvested plant matter is mixed with at least one rubber-soluble organic solvent at a weight ratio of from 2:100 to 20:100 thereby producing a quantity of dissolved rubber and a quantity of solids. After mixing, the dissolved rubber is isolated from the solids to produce a dissolved rubber fraction that contains no more than 2% by weight solids based on the total weight of the dissolved rubber fraction. The at least one rubber-soluble solvent is then removed from the dissolved rubber fraction to produce a solid rubber mass. The solid rubber mass is mixed with at least one rubber-insoluble organic solvent at a weight ratio of 2:100 to 20:100 thereby dissolving a quantity of impurities from the solid rubber mass and thereafter the remaining solid rubber mass is isolated from the at least one rubber-insoluble organic solvent to produce a purified natural rubber. The purified natural rubber contains no more than 3.5% by weight total impurities based upon the total weight of the purified natural rubber that is obtained.

Information

Australian application number
2017200069
Country
JP
Status
Accepted
Type
Standard
Applicant
Bridgestone Corporation, CORP (JP)
Application year
2017

International Patent Classification (IPC) codes

Links

ID Relationship
2013262725 Divisional parent