Fine particles of crosslinked vinyl polymer and process for prod

Details Fine particles of crosslinked vinyl polymer and process for prod Fine particles of crosslinked vinyl polymer and process for prod

1992-11-23

1994-06-07

Teskin, Fred

Stock material or miscellaneous articles

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

Particulate matter

526227, 5262321, 5262928, 526298, 526299, 526300, 526336, 526342, C08F21236, C08F 216

Patent

active

053188527

ABSTRACT:
Fine particles of a crosslinked vinyl polymer having a very high compressive modulus of elasticity, i.e., above 550 kg/mm.sup.2 but not higher than 800 kg/mm.sup.2, and being able to be effectively employed as a material capable of maintaining a minute gap constant, and a process for producing the same which comprises polymerizing 100 parts by weight of a vinyl monomer mixture consisting essentially of 20 to 90 parts by weight of m-divinylbenzene, 10 to 60 parts by weight of a vinyl monomer having a nitrile group and 0 to 50 by weight of a vinyl monomer other than m-divinylbenzene and vinyl monomers having a nitrile group in the presence of 3 to 10 parts by weight of a radical polymerization initiator belonging to the organic peroxides, in an aqueous medium.

REFERENCES:
patent: 3383336 (1968-05-01), Kuyama et al.

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