Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
1977-06-09
1979-03-20
Henderson, C. A.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Polymers from only ethylenic monomers or processes of...
526 22, 526 41, C08F 838, C08F 836
Patent
active
041454910
ABSTRACT:
A process for chlorinating or chlorosulfonating polyethylene comprising dissolving polyethylene in a solvent that is a mixture of methylene chloride and trichlorofluoromethane in a weight ratio of 0.3-1.6, reacting the resultant solution with sulfuryl chloride under pressure to maintain reactants, the resulting chlorinated or chlorosulfonated polyethylene and product gases in a single liquid phase, reducing the pressure on or increasing the temperature of the single liquid phase of chlorinated or chlorosulfonated polyethylene and solvent to form two liquid phases, one a polymer-rich phase and the other a solvent-rich phase, and separating the phases.
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E. I. Du Pont de Nemours and Company
Henderson C. A.
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