Production of polysuccinimide in cyclic carbonate solvent

Details Production of polysuccinimide in cyclic carbonate solvent Production of polysuccinimide in cyclic carbonate solvent

1997-03-03

1998-05-26

Sellers, Robert E.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

524608, 528274, 528286, 528289, C08G 7310

Patent

active

057565953

ABSTRACT:
A method for the preparation of a desired molecular weight polysuccinimide by the catalytic polymerization of aspartic acid in the presence of a cyclic carbonate solvent. Polysuccinimide of relatively high weight average molecular weight and high purity can be produced in relatively high yields while employing a relatively low catalyst loading.

REFERENCES:
patent: 5484945 (1996-01-01), Nagatomo et al.
patent: 5508434 (1996-04-01), Batzel et al.
patent: 5610208 (1997-03-01), Diaroku et al.
patent: 5610264 (1997-03-01), Wood et al.
CAPLUS accession No. 1978:170465, Kokufuta et al., Potentiometric titration behavior of polyaspartic acid prepared by thermal polycondensation, Biosystems, vol. 9, No. 4, pp. 211-214, 1977.

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