Chemistry of carbon compounds – Miscellaneous organic carbon compounds
Patent
1974-05-31
1976-03-23
Levin, Stanford M.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
260 23XA, 260 312R, 260 785R, 260 855XA, 260 863, 260 871, 260 875C, 260 875R, 260 928W, C08F 220
Patent
active
039459586
ABSTRACT:
When vinyl chloride or a mixture of monomers containing vinyl chloride as its main component is subjected to suspension-polymerization, in the presence of a polymerization initiator, employing as a suspending agent an aqueous medium consisting of two kinds of water-soluble cellulose ethers, the 2% aqueous solution of one of which has a viscosity of at most 100 cps at 20.degree.C, and that of the other has a viscosity of at least 400 cps at 20.degree.C, the product obtained will be a porous polymer superior not only in uniformity of particle size, and absorptivity of plasticizers and liquid heat-stabilizers but also in processability.
REFERENCES:
patent: 3375238 (1968-03-01), Bauer et al.
patent: 3592800 (1971-07-01), Oschmann et al.
patent: 3701742 (1972-10-01), Richardson et al.
Kitamura Hajime
Koyanagi Shunichi
Shimizu Toshihide
Bierman Jordan B.
Bierman Linda
Levin Stanford M.
Shinetsu Chemical Company
Stempler Kenneth J.
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