Lignin based materials and methods of making those
OwnerAmar Kumar Mohanty, Manjusri Misra +1inventors
InventorsAmar Kumar Mohanty, Manjusri Misra, Saswata Sahoo
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Abstract
The present invention relates to plastic materials comprising lignin and poly(butylene succinate) (PBS) to methods of manufacturing those plastic materials and to articles obtained by molding the plastic materials of the invention. Since PBS can be obtained from renewable sources, the present invention also provides for bioplastic materials comprising lignin and PBS. The present invention also provides for plastic materials comprising lignin and PBS and at least one fiber and to articles obtained from those plastic materials that are degradable, compostable and recyclable.
Claims20
A plastic material characterized in that said plastic material comprises lignin, poly(butylene succinate) (PBS), and a grass fiber selected from the group consisting of switchgrass, miscanthus, and hemp and wherein said plastic material comprises more than 70% by weight lignin.
A method of controlling the mechanical and thermo-mechanical properties of a plastic material, said mechanical and thermo-mechanical properties including impact strength, HDT, storage modulus, tensile modulus, flexural strength tensile strength and tensile modulus, said plastic material comprising lignin, a grass fiber a grass fiber selected from the group consisting of switchgrass, miscanthus, and hemp, poly(butylene succinate) (PBS), polymeric methylene diphenyl diisocyanate (PMDI) and 2,5-Bis(tert-butylperoxy)-2,5-dimethylhexane, characterized in that said method comprises:
- a. mixing an amount of lignin and the grass fiber to create a mixture,
- b. adding PBS, polymeric methylene diphenyl diisocyanate (PMDI) and 2,5-Bis(tert-butylperoxy)-2,5-dimethylhexane to the mixture,
- wherein the properties of the plastic material is controlled by increasing or reducing the amount of lignin content of said mixture.
A plastic material characterized in that said plastic material comprises more than 70% by weight lignin and poly(butylene succinate) (PBS).
A plastic material characterized in that said plastic material comprises lignin, poly(butylene succinate) (PBS), a grass fiber selected from the group consisting of switchgrass, miscanthus, hemp and kenaf, polymeric methylene diphenyl diisocyanate (PMDI) and 2,5-Bis(tert-butylperoxy)-2,5-dimethylhexane.
A plastic material characterized in that said plastic material comprises lignin, poly(butylene succinate) (PBS), a grass fiber selected from the group consisting of switchgrass, miscanthus, hemp and kenaf, polymeric methylene diphenyl diisocyanate (PMDI), methylene diphenyl diisocyanate polybutadiene prepolymer, and 2,5-Bis(tert-butyl peroxy)-2,5-dimethylhexane.
A method of controlling the mechanical and thermo-mechanical properties of a plastic material, said mechanical and thermo-mechanical properties including impact strength, HDT, storage modulus, tensile modulus, flexural strength tensile strength and tensile modulus, said plastic material comprising lignin, a grass fiber a grass fiber selected from the group consisting of switchgrass, miscanthus, and hemp, and poly (butylene succinate) (PBS), characterized in that said method comprises:
- a. mixing an amount of lignin and the grass fiber to create a mixture, said amount of lignin being more than 70% by weight of the plastic material,
- b. adding PBS to the mixture,
- wherein the properties of the plastic material is controlled by increasing or reducing the amount of lignin content of said mixture.
Dependencies are inferred from the claim text.