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US 6,172,204 B2Granted
Compositions based on lignin derivatives
AssigneeRegents of the University of Minnesota
InventorsSimo Sarkanen, Yan Li
Life of this patent
Estimating the term…
Abstract
A composition that includes the reaction product of a lignin derivative and a reactant selected from the group consisting of alkylating agents, acylating agents, and combinations thereof, where the reaction product has a measurable cohesive strength, and a plasticizer in an amount sufficient to cause the composition to exhibit plastic deformation in response to an applied tensile stress.
Claims22
A composition comprising:
- (a) the reaction product of a lignin derivative and a reactant selected from the group consisting of alkylating agents, acylating agents, and combinations thereof,
- said reaction product having a measurable cohesive strength;
- and
- (b) a plasticizer in an amount sufficient to cause said composition to exhibit plastic deformation in response to an applied tensile stress.
1 more element
A composition comprising:
- (a) the reaction product of a lignin derivative and a reactant selected from the group consisting of alkylating agents, acylating agents, and combinations thereof,
- said reaction product having a measurable cohesive strength,
- wherein said lignin derivative is prepared according to a process comprising subjecting a lignin-containing biomass to a kraft pulping process and then filtering the product of the kraft pulping process with an ultrafiltration membrane having a molecular weight cut-off of at least about 10,000 daltons;
- and
- (b) a plasticizer selected from the group consisting of polyalkylene esters and derivatives thereof, polyalkylene glycols and derivatives thereof, and combinations thereof in an amount sufficient to cause said composition to exhibit plastic deformation in response to an applied tensile stress.
2 more elements
A process for preparing a composition comprising:
- (a) reacting a lignin derivative and a reactant selected from the group consisting of alkylating agents, acylating agents, and combinations thereof to form a reaction product having a measurable cohesive strength;
- and
- (b) blending said reaction product with a plasticizer in an amount sufficient to cause said composition to exhibit plastic deformation in response to an applied tensile stress.
Dependencies are inferred from the claim text.