Antioxidant stabilizer in polymers
AssigneeRenmatix, Inc.
InventorJeremy Roland Austin
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Abstract
The present invention relates to the use of a hardwood lignin, a softwood lignin, and/or a grass lignin as an antioxidant stabilizer in polymers or polymer compositions, such as, for example, thermoplastics, thermoplastic composites, thermosets, coatings, films, adhesives, personal care compositions, or any combination thereof.
Claims16
A method of making a composition comprising a thermoplastic polymer and a biomass, wherein the biomass comprises an antioxidant stabilizer comprising lignin, wherein the lignin has an average particle size of from about 2 micrometers to about 8 micrometers, and wherein the composition comprises cellulose and/or hemicellulose in an amount no greater than 20% based on the weight of the biomass, the method comprising the steps of:
- (a) obtaining a lignin by exposing a biomass to a fluid having a temperature of from about 340° C. to about 400° C. and a pressure of from about 225 bar to about 250 bar;
- and
- (b) combining the lignin with the thermoplastic polymer.
A composition comprising a thermoplastic polymer and a biomass, wherein the biomass comprises an antioxidant stabilizer comprising lignin, wherein the lignin has an average particle size of from about 2 micrometers to about 8 micrometers, and wherein the composition comprises cellulose and/or hemicellulose in an amount no greater than 20% based on the weight of the biomass;
- and wherein the lignin is prepared by exposing a biomass to a fluid having a temperature of from about 340° C. to about 400° C. and a pressure of from about 225 bar to about 250 bar.
Dependencies are inferred from the claim text.