Bead-like polymer and production thereof

Details Bead-like polymer and production thereof Bead-like polymer and production thereof

1986-02-04

1988-12-27

Schofer, Joseph L.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526203, 526320, 5253273, 428402, C08F 2400

Patent

active

047941529

ABSTRACT:
A bead-like glycidyl (meth)acrylate polymer is produced by aqueous suspension polymerization of glycidyl (meth)acrylate alone or a monomer mixture composed of more than 50 weight % of said monomer and at least one other monomer which forms the remainder, in the presence of a specific aqueous polymer, at a pH of from 2 to 9 and at a stirring speed of from 50 to 500 r.p.m. By heat treating said bead-like polymer at a pH below 3 and at a temperature above 70.degree. C., hydroxyl groups resulting from the ring opening of the epoxy groups are introduced, whereby a solvent-insoluble bead-like polymer having a gel water content not less than 30% is produced.

REFERENCES:
patent: 3886129 (1975-05-01), Kurz et al.
patent: 3966847 (1976-06-01), Seiderman
patent: 3970633 (1976-07-01), Miller et al.
patent: 4170582 (1979-10-01), Mori et al.
patent: 4349654 (1982-09-01), Ohmae et al.

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