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US 4,072,640 AGranted
Copolymerization of vinyl monomers with cellulose and starch in copper ammonium solutions
AssigneeInstituto Venezolano de Investigaciones Cientificas
InventorJose M. Sosa
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Abstract
A process for the production of starch or cellulose copolymers with vinyl monomers by dissolving the starch or cellulose in copper ammonium solution, adding the vinyl monomer and catalyzing with light or heat. Methyl methacrylate can also be homopolymerized by this process.
Claims10
A process for the copolymerization of starch or cellulose with a vinyl monomer or monomers, comprising:
- dissolving the starch or cellulose in a copper ammonium solution and adding the vinyl monomer or monomers thereto;
- catalyzing polymerization with heat or light until the desired polymer is achieved;
- and
- recovering the polymer so produced.
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A process for the homopolymerization of methyl methacrylate, comprising:
- dissolving starch or cellulose in a copper ammonium solution and adding the methyl methacrylate thereto;
- catalyzing polymerization with light;
- and
- stopping the polymerization reaction after homopolymerization has begun but before copolymerization of the methyl methacrylate with the starch or cellulose begins, said stopping being after between about 30 minutes and 4 hours.
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Dependencies are inferred from the claim text.