Process for the preparation of copolymers of vinylphosphonic aci

Details Process for the preparation of copolymers of vinylphosphonic aci Process for the preparation of copolymers of vinylphosphonic aci

1986-04-24

1988-06-07

Schofer, Joseph L.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526227, 526274, 526278, C08F 200

Patent

active

047497580

ABSTRACT:
Process for the preparation of polymers of vinylphosphonic acid in water with the aid of catalysts which form free radicals, which comprises heating vinylphosphonic acid and (meth)acrylic acid to temperatures of 40.degree. to 120.degree. C. in water in the presence of 1 to 5.5% by weight of aliphatic peroxy esters and/or diacyl peroxides which dissociate by half in one hour at temperatures below 122.degree. C., the total amount of vinylphosphonic acid being taken together with up to 30% by weight, based on the total amount of monomer, of (meth)acrylic acid and the remainder of the (meth)acrylic acid being added in the course of the reaction.
The copolymers are suitable for use in detergent and cleaning agents.

REFERENCES:
patent: 3208943 (1965-09-01), Kirby
patent: 3297663 (1967-01-01), Herbst et al.
patent: 4033983 (1977-07-01), Starks
patent: 4342857 (1982-08-01), Gaffar

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