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US 2010/0137519 A1Published application
Process for the Preparation of a Vulcanized Blend of Rubbers
OwnerJacobus Wilhelmus Maria J.W.M. Noordermeer, Nityananda L. Naskar +1inventors
InventorsJacobus Wilhelmus Maria J.W.M. Noordermeer, Nityananda L. Naskar, Rabindra Nath R.N. Datta
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Abstract
This invention relates to a process for preparing a vulcanized rubber blend, said blend comprising (a) natural rubber or poly-isoprene rubber, (b) butadiene based rubber, and (c) rubber with an essentially saturated backbone. The improvement is that rubber c) is pre-heated with at least part of the vulcanization system before mixing with rubbers a) and b) and co-vulcanizing.
Claims23
Process for the preparation of a vulcanized blend of rubbers, said blend comprising:
- a) 0 to 100 parts by weight of either natural rubber or poly-isoprene rubber,
- b) 100 to 0 parts by weight of a butadiene based rubber, and
- c) 0.5 to 50 parts by weight of a rubber with an essentially saturated backbone,
- under the influence of a sulfur vulcanization system, wherein rubber c) is pre-heated till close to scorch with at least a part of the sulfur vulcanization system, after which the resulting pre-vulcanized rubber c) is mixed with rubbers a) and/or b) and the remaining part of the sulfur vulcanization system, after which the resulting blend is co-vulcanized.
1 more element
Blend of rubbers, comprising:
- a) 0 to 100 parts by weight of either natural rubber or poly-isoprene rubber,
- b) 100 to 0 parts by weight of a butadiene based rubber, and
- c) 0.5 to 50 parts by weight of a sulfur pre-vulcanized rubber, said rubber having an essentially saturated backbone, and said rubber being pre-vulcanized close to scorch.
Dependencies are inferred from the claim text.