Aspartic acid copolymer and process for producing the same
AssigneeMitsubishi Chemical Corporation
InventorsMasayuki Tomida, Masako Yoshikawa, Takeshi Nakato
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Abstract
This invention an aspartic acid copolymer obtained by copolymerizing a monomer mixture comprising (1) aspartic acid, maleamic acid and/or a reaction product of maleic acid and ammonia as a main monomer, (2) fumaric acid, and (3) succinic acid and containing 0.005 to 3% by weight, based on the total monomers, of ammonia in the form of an ammonium salt and hydrolyzing the resulting copolymer partially or completely; and a process for producing the same.
Claims8
An aspartic acid copolymer obtained by copolymerizing a monomer mixture comprising (1) aspartic acid, maleamic acid and/or a reaction product of maleic acid and ammonia as a main monomer, (2) fumaric acid, and (3) succinic acid and containing 0.005 to 3% by weight, based on the total monomers, of ammonia in the form of an ammonium salt and hydrolyzing the resulting copolymer partially or completely.
A process for producing an aspartic acid copolymer comprising:
- copolymerizing a monomer mixture comprising (1) aspartic acid, maleamic acid and/or a reaction product of maleic acid and ammonia as a main monomer, (2) fumaric acid, and (3) succinic acid and containing 0.005 to 3% by weight, based on the total monomers, of ammonia in the form of an ammonium salt;
- and
- hydrolyzing the resulting copolymer partially or completely.
A process for producing an aspartic acid copolymer comprising:
- copolymerizing a monomer mixture comprising (1) aspartic acid, maleamic acid and/or a reaction product of maleic acid and ammonia as a main monomer, (2) fumaric acid, (3) succinic acid, (4) maleic acid and (5) malic acid and containing 0.005 to 3% by weight, based on the total monomers, of ammonia in the form of an ammonium salt;
- and
- hydrolyzing the resulting copolymer partially or completely, wherein the (2) fumaric acid, and (3) succinic acid, (4) maleic acid and (5) malic acid each may be partly in the form of an ammonium salt and wherein the (2) fumaric acid is used in an amount of 0.005 to 8.0% by weight, the (3) succinic, acid is used in an amount of 0.0001 to 0.3% by weight, the (4) maleic acid is used in an amount of from 0.005 to 7.0% by weight and the (5) malic, acid is used in an amount of from 0.01 to 0.8% by weight based on the total monomers.
Dependencies are inferred from the claim text.