Olefin metathesis catalysts for degelling polymerization reactors
US5446102A · kind A · utility
21Cited by
10References
16Claims
0Family size
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Key dates
| Filing date | Aug 10, 1994 |
| Grant date | Aug 29, 1995 |
| Priority date | — |
| Expiry date | Aug 10, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F8/50
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Depolymerization or molecular weight reduction of polymers and gelled polymers containing internal unsaturation along the polymer backbone is performed in the presence of a molybdenum or tungsten compounds having the structural formula: EQU M(NR.sub.1)(OR.sub.2).sub.2 (CHR.sub.3) PA1 wherein M is molybdenum or tungsten; PA1 R.sub.1 and R.sub.2 are unsubstituted or halo-substituted alkyl, aryl, aralkyl groups or silicon-containing analogs thereof; PA1 R.sub.3 is an alkyl, aryl, aralkyl group of any substituent that results from the initial reaction between the M.dbd.CHR.sub.3 complex and an olefin treating agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.