Anti-agglomerants for elastomeric ethylene/A-olefin copolymers
OwnerDavid Thompson, Clinton Lundinventors
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Abstract
The invention relates to a method to reduce or prevent agglomeration of elastomeric ethylene/α-olefin copolymer particles in aqueous media by LCST compounds.
Claims15
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 elastomeric ethylene/α-olefin copolymer, and
- ii) an organic diluent
- with an aqueous medium comprising at least one LOST 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 the elastomeric ethylene/α-olefin copolymer particles.
A method to prevent or reduce or to slow-down agglomeration of slurries comprising elastomeric ethylene/α-olefin copolymer particles suspended in aqueous media, the method comprising adding at least one LOST compound having a cloud point of 0 to 100° C. to a slurry comprising elastomeric ethylene/α-olefin copolymer particles suspended therein.
Elastomeric ethylene/α-olefin copolymer particles comprising:
- an elastomeric ethylene/α-olefin copolymer content of 98.5 wt. % or more;
- and
- 1 ppm to 18,000 ppm of at least one LCST compound.
Elastomeric ethylene/α-olefin copolymer particles comprising:
- I) 100 parts by weight of an ethylene/α-olefin copolymer;
- II) 0.0001 to 0.5 parts by weight of at least one LCST compound;
- III) no or 0.0001 to 3.0 parts by weight of total of salts of mono- or multivalent metal 10 ns;
- IV) no or 0.005 to 0.1 parts by weight of antioxidants;
- and
- V) 0.005 to 0.5 parts by weight of volatiles having a boiling point at standard pressure of 200° C. or less.
Dependencies are inferred from the claim text.