Process for the production of paste-forming vinyl chloride polym

Details Process for the production of paste-forming vinyl chloride polym Process for the production of paste-forming vinyl chloride polym

1992-06-11

1995-01-03

Szekely, Peter

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526214, 526225, C08F 224

Patent

active

053787803

ABSTRACT:
Paste-forming polymers of vinyl chloride are produced by discontinuous polymerization in the presence of a conventional predispersion of emulsifier, dispersion acid, water and optional monomer-soluble catalyst. The predispersion is prepared only with 30-80% by weight of the amount of emulsifier required in total. The remainder of the emulsifier, or a component forming the emulsifier, is added in metered amounts as an aqueous solution batchwise or continously to the polymerization mixture after a conversion of 10-60% by weight.
The thus-obtained polymers lead to pastes of an especially low viscosity, even under high shear stress, and result in open-cell plasticized foam materials having a good elastic memory capacity.

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