Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Polymers from only ethylenic monomers or processes of...
Patent
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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Boeke Burkhard
Kruse Wolfgang A.
Huls Aktiengesellschaft
Szekely Peter
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