Back to results
US 2014/0228521 A1Published application
Process for continuous production of halogen-free thermoplastic elastomer compositions
AssigneeLANXESS Butyl. Pte.Ltd.
InventorsConrad Siegers, Ralf-Ingo Schenkel, Rayner Krista
Life of this patent
Estimating the term…
Abstract
A continuous process for the production of a dynamically vulcanized thermoplastic elastomer comprising a thermoplastic resin and a non-halogenated elastomer with a multiolefin content of greater than 3.5 mol % that has been modified in situ with a carboxylic anhydride. The process provides materials with improved elongation at break and ultimate tensile strength that can be produced economically and with reduced environmental impact.
Claims15
A continuous process for the preparation of a thermoplastic elastomer composition comprising the steps of:
- a) providing a thermoplastic resin;
- b) providing a non-halogenated elastomer comprising repeating units derived from at least one C4 to C7 isomonoolefin monomer and at least 3.5 mol % of a C4 to C16 multiolefin monomer;
- c) providing an unsaturated carboxylic acid derivative having 4 to 16 carbon atoms;
- d) admixing in a first stage of a continuous mixer the thermoplastic resin, the elastomer and the unsaturated carboxylic acid derivative to create a thermoplastic elastomer composition comprising the carboxylic acid derivative grafted to the elastomer;
- e) admixing in a second stage of the continuous mixer a curing system suitable for use with non-halogenated elastomers to dynamically vulcanize the thermoplastic elastomer.
2 more elements
Dependencies are inferred from the claim text.