发明名称 |
Rubber devulcanization process |
摘要 |
A process for devulcanizing a rubber vulcanizate by desulfurization involves suspending a rubber vulcanizate crumb in a solvent which preferably swells the rubber vulcanizate before or during the devulcanization reaction and adding an alkali metal, such as sodium, to the suspension. The alkali metal cleaves mono-, di- and polysulfidic cross-linkages in the rubber vulcanizate to liberate rubber polymer having a molecular weight substantially equal to that of the rubber polymer prior to vulcanization. Carbon black may also be recovered for re-use in accordance with the process of the present invention. Devulcanized rubber may be subjected to a re-vulcanization reaction without separation of rubber polymer from the solvent by addition of an appropriate curing mixture.
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申请公布号 |
US5602186(A) |
申请公布日期 |
1997.02.11 |
申请号 |
US19950549593 |
申请日期 |
1995.10.27 |
申请人 |
EXXON RESEARCH AND ENGINEERING COMPANY |
发明人 |
MYERS, RONALD D.;NICHOLSON, PETER;MACLEOD, JOHN B.;MOIR, MICHAEL E. |
分类号 |
C08J11/16;(IPC1-7):C08J11/10 |
主分类号 |
C08J11/16 |
代理机构 |
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