Anti-agglomerants for the rubber industry
AssigneeArlanxeo Singapore Pte. Ltd.
InventorsDavid Thompson, Clinton Lund
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Abstract
The invention relates to a method to reduce or prevent agglomeration of rubber particles in aqueous media by LCST compounds and elastomers obtained thereby. The invention further relates to elastomer products comprising the same or derived therefrom.
Claims24
A process for the preparation of an aqueous slurry comprising a plurality of elastomer particles suspended therein, the process comprising:
- A) contacting an organic medium comprising
- i) at least one elastomer, and
- ii) an organic diluent
- with an aqueous medium comprising at least one lower critical solution temperature (LCST) compound having a cloud point of 0 to 100° C.;
- and
- B) removing at least partially the organic diluent to obtain an aqueous slurry comprising elastomer particles.
The process according to 1, wherein the elastomers include butyl rubbers and halogenated butyl rubbers, polyisobutylene, ethylene propylene diene M-class rubbers (EPDM), nitrile butadiene rubbers (NBR), hydrogenated nitrile butadiene rubbers (HNBR) and styrene-butadiene rubbers (SBR).
An elastomer composition comprising:
- I) 96.0 wt. % or more of an elastomer;
- II) 0 to 3.0 wt. % of salts of mono- or multivalent metal ions;
- and
- II) 1 ppm to 5,000 ppm of at least one LCST compound.
Dependencies are inferred from the claim text.