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US 6,319,993 B2Granted
Vulcanizing agents for unsaturated rubber mixtures
AssigneeBayer Aktiengesellschaft
InventorsHermann-Josef Weidenhaupt, Hartmuth Buding, Josef Hahn, Marco Runk
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Abstract
The invention relates to polymeric sulfur compounds, their preparation and their use as vulcanizing agcnts for unsaturated rubber mixtures.
Claims10
A polymeric sulfur compound of the formula (I)
- wherein the substituents
- R represent hydrogen and/or methyl,
- n and m independently denote integral or non-integral numbers in the range from 2 to 12 and
- x denotes an integral or non-integral number in the range from 2 to 500.
1 more element
A process for the preparation of a polymeric sulfur compound comprising the structure
- wherein the substituents
- R represent hydrogen and/or methyl,
- n and m independently denote integral or non-integral numbers in the range from 2 to 12 and
- x denotes an integral or non-integral number in the range from 2 to 500;
- wherein said polymeric sulfur compound is produced by reacting di-cyclopentenyl-polysulfanes of the formulae (II), (III) and/or (IV)
- with sulfur and hydrogen sulfide in the presence of amines at temperatures of 100 to 180°C.
3 more elements
A vulcanizing agent for the production of unsaturated rubber vulcanizates comprising polymeric sulfur compounds of the formula (I)
- wherein the substituents
- R represent hydrogen and/or methyl,
- n and m independently denote integral or non-integral numbers in the range from 2 to 12 and
- x denotes an integral or non-integral number in the range from 2 to 500.
1 more element
A vulcanizate comprising polymeric sulfur compounds of the formula (I)
- wherein the substituents
- R represent hydrogen and/or methyl,
- n and m independently denote integral or non-integral numbers in the range from 2 to 12 and
- x denotes an integral or non-integral number in the range from 2 to 500.
1 more element
Dependencies are inferred from the claim text.