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US 11,434,333 B2Granted
Methods of producing an elastomer compound and elastomer compounds
AssigneeCabot Corporation
InventorsDavid C. Reynolds, Gerald D. Adler, Martin C. Green
Life of this patent
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Abstract
Methods to prepare elastomer compounds are described that include dry mixing at least one additive to an elastomer composite masterbatch at low temperatures over a shortened mixing cycle with reduced energy consumption. The elastomer composite masterbatch is produced in a liquid masterbatch process. The resulting elastomer compounds are further described as well as property improvements that can be achieved.
Claims16
A method to prepare an elastomer composite masterbatch, comprising:
- dry mixing in a multi-stage mixing process, an elastomer composite masterbatch with at least one additive at a process temperature to obtain an elastomer compound, wherein
- a) wherein when the multi-stage mixing process is a two stage mixing process, the process temperature in stage one of the two stage mixing process is below 130 deg C. in stage one and is from 90 deg C. to 120 deg C. in stage two of the two stage mixing process when a curative agent is present in stage two of the two stage mixing, and
- b) wherein when the multi-stage mixing process has two or more mixing stages in the multi-stage mixing process, the process temperature is below 130 deg C. in stage one of a multi-stage mixing process and is below 130 deg C. in subsequent stages of the multi-stage mixing process when a curative agent is not present in the subsequent stages of the multi-stage mixing process;
- and
- c) wherein when the multi-stage mixing process has two or more mixing stages in the multi-stage mixing process, the process temperature is below 130 deg C. in stage one of a multi-stage mixing process and is from 90 to below 120 deg C. in subsequent stages of the multi-stage mixing process when a curative agent is present in the subsequent stages of the multi-stage mixing process, and
- wherein the elastomer composite masterbatch is a masterbatch having a macrodispersion with a percentage of undispersed areas of filler of 2% or lower.
3 more elements
Dependencies are inferred from the claim text.