Patent ID: 9156951
Filing Date: 2015-10-13
Classification: C07G,C08G,C08H,C08L

Abstract:
1. A method for producing a trans-esterified hydroxypropyl lignin (HPL), the method comprising: precipitating a lignin; dissolving the precipitated lignin in a solution; adding a reagent to the solution; adjusting a pH of the solution; allowing reactions in the solution to occur for a predetermined amount of time, wherein the lignin undergoes a transesterification with a nearby polyester macromolecule from a thermoplastic polyester, thereby transferring a segment of the polyester onto the lignin; precipitating the solution to produce a precipitate; and washing, filtering, and drying the precipitate to produce the trans-esterified HPL, wherein the trans-esterified HPL can be blended with a thermoplastic polyester.