Policarboxylic acids

Details Policarboxylic acids Policarboxylic acids

1996-06-20

1997-09-02

Schofer, Joseph L.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

C08F 200

Patent

active

056632533

ABSTRACT:
The present invention relates to a process for the preparation of crosslinked polymers and copolymers of acrylic acid and methacrylic acid of formula ##STR1## wherein R.sub.1 is hydrogen or methyl. Said process, using ethyl formate as solvent, allows to obtain polymers having low residue of monomer and of solvent and with higher thickening capacity.

REFERENCES:
patent: 2824124 (1958-02-01), Robertson et al.
patent: 4267103 (1981-05-01), Cohen
patent: 4683274 (1987-07-01), Nakamura et al.
patent: 4758641 (1988-07-01), Hsu
patent: 5342911 (1994-08-01), Bresciani

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