Dimethyl sulfone as a solid solvent for vinylidene chloride cont

Details Dimethyl sulfone as a solid solvent for vinylidene chloride cont Dimethyl sulfone as a solid solvent for vinylidene chloride cont

1987-02-17

1989-06-27

Schofer, Joseph L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

524568, C08K 541

Patent

active

048431176

ABSTRACT:
The present invention relates to compositions and methods for reducing the melt viscosity of vinylidene chloride containing polymers having a majority of polymerized vinylidene chloride. The methods involve introducing a solid solvent into a vinylidene chloride containing polymer. The solid solvent is compatible with vinylidene chloride containing polymers at a processing temperature above the solid solvent melting point and will reduce the melt viscosity and improve processing of the vinylidene chloride containing polymer. Upon cooling below the solid solvent melting point the solid solvent will beocme microdispersed in the vinylidene chloride containing polymer with little or no solid solvent remaining dissolved in the vinylidene chloride containing polymer. One such solid solvent is dimethyl sulfone. The solid solvents are introduced into the vinylidene chloride containing polymer directly, or indirectly through the use of a polymer or additive containing the solid solvent which is blended into the vinylidene chloride containing polymer.

REFERENCES:
patent: 4015064 (1977-03-01), Feldman et al.
patent: 4426477 (1984-01-01), Yasumatsu et al.
The Merck Index, Tenth Edition 1983, p. 475, Ref. #3254.

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