Method of producing suspension polymers and improved suspension

Details Method of producing suspension polymers and improved suspension Method of producing suspension polymers and improved suspension

1991-07-30

1992-08-25

Schofer, Joseph L.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526233, 5263184, 526325, C08F 430

Patent

active

051420082

ABSTRACT:
In the suspension polymerization of (meth)acrylic acid esters or of vinyl aromatics or of mixtures of such monomers, the formation of undesired, very fine "emulsion polymer", which reduces the yield, is reduced if the polymerization is carried out in the presence of polyvalent phosphonic acids or their alkali metal salts or ammonium salts or of alkali metal salts or ammonium salts of condensed inorganic phosphates, e.g. of Graham's salt.

REFERENCES:
patent: 3026308 (1962-03-01), Kearney
patent: 3663482 (1972-05-01), Gammon
patent: 4269959 (1981-05-01), Lawton
patent: 4677173 (1987-06-01), Holle et al.
European Search Report.

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