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US 11,492,317 B2Granted
Synthesis of bio-based polyols from epoxidized cardanol and epoxidized triglyceride by using thiol-containing reagents
AssigneeThe University of Akron
InventorsQixin Zhou, Haoran Wang
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Abstract
The present invention relates to a bio-based polyol comprising a thiol-epoxy reaction product of an epoxidized nut or seed oil derivative, and a thiol-containing reactant. The bio-based polyol of the present invention can then be combined with a diisocyanate or a polymeric isocyanate to create a polyurethane material.
Claims5
A bio-based polyol comprising a thiol-epoxy reaction product of:
- an epoxidized nut or seed oil derivative;
- and
- a thiol-containing reactant;
- wherein the thiol-epoxy reaction takes place in the presence of a strong base catalyst and a solvent;
- wherein the strong base catalyst is selected from the group consisting of lithium hydroxide (LiOH), sodium hydroxide (NaOH), potassium hydroxide (KOH), 1,8-diazobicyclo[5.4.0]undec-7-ene, and tetrabutylammonium fluoride;
- and wherein the solvent is selected from the group consisting of tetrahydrofuran (THF), dimethyl sulfoxide (DMSO), and dimethylformamide (DMF).
3 more elements
A method of preparing a bio-based polyol, the method comprising the steps of:
- providing an epoxidized nut or seed oil derivative;
- providing a thiol-containing reactant;
- and
- combining the epoxidized nut or seed oil derivative and the thiol-containing reactant so as to create a thiol-epoxy reaction to form the bio-based polyol;
- wherein the thiol-epoxy reaction takes place in the presence of a strong base catalyst and a solvent;
- wherein the strong base catalyst is selected from the group consisting of lithium hydroxide (LiOH), sodium hydroxide (NaOH), potassium hydroxide (KOH), 1,8-diazobicyclo[5.4.0]undec-7-ene, and tetrabutylammonium fluoride;
- and wherein the solvent is selected from the group consisting of tetrahydrofuran (THF), dimethyl sulfoxide (DMSO), and dimethylformamide (DMF).
4 more elements
Dependencies are inferred from the claim text.