Producing polychloroprene latices
AssigneeLANXESS Deutschland GmbH
InventorsLothar Reif, Christian Lente
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Abstract
The novel process provides latices of homo- and copolymers of chloroprene and of one or more further copolymerizable monomers at a higher reaction rate and hence in an improved space-time yield. The latices obtained have a high gel content, distinctly lower levels of by-products, in particular of chloroprene dimer, than prior art products, and are useful, if appropriate in concentrated form, for a wide variety of applications.
Claims21
A process for producing a latex of homo- or copolymers of chloroprene and if appropriate one or more further copolymerizable unsaturated monomers by emulsion polymerization, comprising, proceeding from a starting temperature TS, raising the polymerization temperature during the emulsion polymerization
- a) by at least 3° C. above the starting temperature TS up to a conversion of 50% and subsequently
- b) by at least 6° C. above the starting temperature TS up to a conversion of 90%.
Dependencies are inferred from the claim text.