Powdery hydrophilic fillers

Details Powdery hydrophilic fillers Powdery hydrophilic fillers

1975-07-21

1977-05-31

Kight, III, John

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

260 37R, 526 16, 526208, 526209, 526210, 526212, 526217, 526271, 526292, 526317, 526909, C08F 844, C08F 214

Patent

active

040270823

ABSTRACT:
There is disclosed a process for producing carboxyl-containing hydrophilic polymeric fillers comprising polymerizing at least one carboxyl-containing monomer with a cross-linking monomer in an oxygen bearing organic solvent for the monomers and in the presence of a free radical catalyst to form a polymeric precipitate and treating the thus formed polymeric precipitate with a solution containing sodium, potassium or ammonium ions thereby transforming the same into the corresponding polymeric salt, said solvent being a non-solvent for the polymer.

REFERENCES:
patent: 2923692 (1960-02-01), Ackerman et al.
patent: 3313748 (1967-04-01), Burke
patent: 3530102 (1970-09-01), Welch et al.
patent: 3586646 (1971-06-01), Corte et al.

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