Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1980-10-03
1982-08-03
Levin, Stanford M.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
525289, 525317, C08F25502, C08F25504, C08F25506
Patent
active
043428452
ABSTRACT:
The present invention relates to production of vinyl halide-polyolefin graft copolymers by a liquid phase bulk polymerization process wherein the process is carried out in the presence of a diluent. Suitable diluents preferably have vaporization pressure characteristics, within 100 psi., and similar liquid state viscosity, as vinyl halide monomer. The diluents are soluble in vinyl halide monomer under reaction conditions and are inert to the polymerization mass. The diluents are straight or branched chain, or cyclic saturated hydrocarbons having from about 3 to about 15 carbon atoms and, more preferably, from about 4 to about 8 carbon atoms. Particularly useful diluents are n-propane, n-butane, isobutane or mixtures thereof. The diluents are utilized in amounts from about 0.2 to less than about 50.0 percent based upon the total weight of the reaction charge.
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Hooker Chemicals & Plastics Corp.
Levin Stanford M.
Mudd James F.
Tao James F.
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