Process for preparing phosphonate-terminated polymers

Details Process for preparing phosphonate-terminated polymers Process for preparing phosphonate-terminated polymers

1997-02-03

1999-02-02

Schofer, Joseph L.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

5263171, 526281, C08F 200

Patent

active

058666648

ABSTRACT:
A process for efficiently utilizing phosphorous acid or salts thereof as a chain transfer agent in the polymerization of monomers, particulary unsaturated carboxylic acid monomers, is provided, where the polymerization is conducted at an in-process solids level of at least 40 percent and in-process neutralization level of at least 30% to produce low molecular weight water-soluble phosphonate-terminated polymers.

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Chemical Abstracts, vol. 78, No. 24, p. 4, Jun. 18, 1973, V.P. Zubov et al., Polymerization of Allyl Monomers in the Presence of Phosphoric Acid.
EO Search Report dated Jun. 18, 1997.

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