LOW Tg LIGNIN
OwnerAngela P. Doddinventor
Life of this patent
Estimating the term…
Abstract
Lignin has a weight average molecular weight of at least 6,000 daltons and comprising (a) from 2% to 10% of a low molecular component having a weight average molecular weight (Mw) of from 300 to 1500 daltons, and (b) from 10% to 50% of a high molecular weight component having a weight average molecular weight (Mw) of at least 10,000 daltons; and exhibiting a Tg of from 100° C. to 130° C. when measured by differential scanning calorimetry.
Claims7
A lignin having a weight average molecular weight (Mw) of at least 6,000 daltons, wherein the lignin comprises:
- (a) from 2% to 10% of total low molecular weight components, wherein low molecular weight components are those having a weight average molecular weight (Mw) of from 300 to 1500 daltons, and
- (b) from 15% to 50% of total high molecular weight components, wherein high molecular weight components are those having a weight average molecular weight (Mw) of at least 10,000 daltons;
- wherein the lignin exhibits a Tg of from 100° C. to 130° C. when measured by differential scanning calorimetry.
A lignin having a weight average molecular weight of at least 6,000 daltons, wherein the lignin comprises:
- (a) about 4% of an F1 fraction, and
- (b) about 42% of an F5 fraction;
- wherein the fractions are determined by the Kringstad fractionation process;
- and
- wherein the lignin exhibits a Tg of from 100° C. to 130° C. when measured by differential scanning calorimetry.
Dependencies are inferred from the claim text.