Crosslinked bead polymers and their preparation

Details Crosslinked bead polymers and their preparation Crosslinked bead polymers and their preparation

1990-08-15

1991-09-03

Schofer, Joseph L.

Stock material or miscellaneous articles

Coated or structually defined flake, particle, cell, strand,...

Particulate matter

526279, 526301, 526311, 526314, 526332, 5253265, C08F 800, C08F24600, C08F23008

Patent

active

050453955

ABSTRACT:
Crosslinked bead polymers having an average particle diameter in the range of from 0.5-10 .mu.m and a narrow particle size distribution can be prepared by polymerization of vinyl monomers and silane monomer units which contain a hydrolysable group, the polymerization being carried out in a non-aqueous, polar medium using a free-radical former as the initiator in the presence of a polymer which is soluble in this medium and acts as a dispersant, and furthermore in the presence of a low molecular weight surfactant, and the resulting polymer is then crosslinked by the action of an aqueous acid or base.

REFERENCES:
patent: 3706697 (1972-12-01), Backderf
patent: 4048422 (1977-09-01), Sackmann
patent: 4147688 (1979-04-01), Makhlouf
patent: 4287299 (1981-09-01), Himmelmann
patent: 4524131 (1985-06-01), Himmelmann
patent: 4614708 (1986-09-01), Timmermann
patent: 4861818 (1989-08-01), Timmermann
Houben-Weyl, Methods of Organic Chemistry, vol. E20/I, p. 227.
Ullmann, Encyclopedia of Industrial Chemistry, vol. 19, p. 132.

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