Patent ID: 11884824
Assignee: PRISMA RENEWABLE COMPOSITES, LLC
Field: Macromolecular chemistry, polymers (Chemistry)
Classification: CPC C | IPC C

Claim 16:
17. A method for preparing a thermoplastic acrylonitrile containing copolymer/lignin copolymer composite comprising:
melt blending (i) a thermoplastic acrylonitrile containing copolymer, wherein the thermoplastic acrylonitrile containing copolymer is a first acrylonitrile-butadiene-styrene copolymer, (ii) lignin, wherein the lignin is selected from a kraft lignin, a sulfite lignin, a sulfur-free lignin, or combinations thereof and sourced from a hardwood or softwood feedstock, and (iii) a compatibilizing agent, wherein the compatibilizing agent includes at least a dianhydride, and a second acrylonitrile, butadiene and styrene copolymer having a butadiene content of at least 50% by weight, which is a different copolymer than the first acrylonitrile-butadiene-styrene copolymer,
forming a substantially homogeneous blend of (i)-(iii); and
forming a composite article from the substantially homogeneous blend, wherein the composite article has a notched izod impact strength of at least 2 kJ/m2 and/or an elongation at break of at least 2% and wherein the lignin is present in an amount from about 5 to 50 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 compatibilizing agent comprises from about 0.5 to 25% by weight of the total weight of the blend.