US 11,708,486 B2
Acrylonitrile butadiene styrene copolymer/lignin blends
Christopher D. Webb, Knoxville, TN (US); William M. Sanford, Knoxville, TN (US); and Adam A. McCall, Knoxville, TN (US)
Assigned to Prisma Renewable Composites, LLC, Knoxville, TN (US)
Filed by Prisma Renewable Composites, LLC, Knoxville, TN (US)
Filed on Oct. 25, 2019, as Appl. No. 16/663,497.
Claims priority of provisional application 62/752,001, filed on Oct. 29, 2018.
Prior Publication US 2020/0131359 A1, Apr. 30, 2020
Int. Cl. C08L 55/02 (2006.01); C08J 3/20 (2006.01)
CPC C08L 55/02 (2013.01) [C08J 3/201 (2013.01); C08L 2205/025 (2013.01); C08L 2205/03 (2013.01); C08L 2205/08 (2013.01)] 16 Claims
 
1. A thermoplastic acrylonitrile-butadiene-styrene copolymer/lignin blend comprising:
(i) an amount of lignin, wherein the lignin is derived from a lignocellulosic feedstock, and wherein the lignin has been isolated from the lignocellulosic feedstock;
(ii) an amount of a first acrylonitrile-butadiene-styrene copolymer; and
(iii) an amount of compatibilizing agent, the compatibilizing agent including a first amount of a second acrylonitrile-butadiene-styrene copolymer having a butadiene content of at least about 50% by weight, which is a different copolymer than the first acrylonitrile-butadiene-styrene copolymer, and a second amount of a monomeric maleic anhydride, wherein the second acrylonitrile-butadiene-styrene copolymer and the monomeric maleic anhydride are separate compounds within the blend,
wherein the lignin is present in an amount of at least 5 wt % by total weight of components (i) and (ii), components (i) and (ii) are present together in an amount from 75 wt % or greater by weight of the total weight of the blend, and the total amount of the compatibilizing agent comprises from about 0.5 to 25% by weight of the total weight of the blend.