Organophosphorus compounds having polysulfide bridge
US7476700B2 · kind B2 · utility
2Cited by
4References
24Claims
0Family size
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Key dates
| Filing date | Jul 7, 2003 |
| Grant date | Jan 13, 2009 |
| Priority date | — |
| Expiry date | Jul 4, 2024 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08K5/53
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention relates to organophosphorus compounds comprising a polysulfide bridge, to their process of preparation and to their use as coupling agent between an inorganic or metal filler and an elastomer. The compounds correspond to the formula (I) (RO)2−tR1tP(O)—Ox—(CH2)y—Sz—(CH2)y—Ox—P(O) (OR)2−tR1t in which R represents a hydrogen , an alkyl, an aryl, a trialkylsilyl, a trialkylamino or an alkali metal; R1 represents an alkyl or an aryl; x is 0 or 1; y is an integer from 1 to 22, preferably from 2 to 4; z is equal or larger than 3, t is 0 or 1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.