(Meth)acrylic acid/itaconic acid copolymers, their preparation a

Details (Meth)acrylic acid/itaconic acid copolymers, their preparation a (Meth)acrylic acid/itaconic acid copolymers, their preparation a

1982-07-22

1984-11-27

Schofer, Joseph L.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526317, 525902, C08F 222

Patent

active

044852231

ABSTRACT:
Substantially homogeneous (meth)acrylic acid/itaconic acid copolymers of number average molecular weight of 500 to 7000 are prepared by copolymerizing in aqueous solution 5 to 90 mole percent acrylic or methacrylic acid monomer with 95 to 10 mole percent itaconic acid monomer at 80.degree. to 120.degree. C. in the presence of a polymerization initiator, the acrylic or methacrylic acid monomer and at least half of the initiator being added separately and continuously to the itaconic acid monomer throughout the polymerization period. The copolymers are employed at a level of from about 0.1 to 100 ppm for prevention of alkaline calcium and magnesium scale formation, such as during seawater evaporative desalination.

REFERENCES:
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patent: 3308067 (1967-03-01), Diehl
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patent: 3507647 (1970-04-01), Sanders
patent: 3738972 (1973-06-01), Moriyama et al.
Marvel et al., J. Org. Chem., 24, 599 (1959).
Nagai et al., Kobunshi Kagaku, 17, 748 (1960).

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