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US 2024/0336708 A1Published application
Purified guayule natural rubber and related processes
AssigneeBridgestone Corporation
InventorsMichael Richard Hartzell, Robert Ward White, Taigyoo Park, Mark DeDecker, Yingyi Huang
Life of this patent
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Abstract
A purified guayule natural rubber is provided which has a particular Mw, Mn, Mw/Mn, resin content and ash content. Also provided are related processes for obtaining the purified guayule natural rubber from an initial co-solvent based miscella which contains solubilized guayule rubber, at least one polar solvent and at least one non-polar solvent using a fractionation system.
Claims22
1-21. (canceled)
A purified guayule natural rubber having
- a Mw of at least 1.2 million grams/mole, preferably 1.25 to 1.35 grams/mole,
- an Mn of at least 0.25 million grams/mole, preferably 0.3 to 0.4 million grams/mole,
- a Mw/Mn of 3-4, preferably 3.3 to 3.8,
- a resin content of about 0.5 to about 5% by weight, and
- an ash content of about 0.1 to about 0.2 weight %.
2 more elements
Dependencies are inferred from the claim text.