Dispersants prepared from high polydispersity olefin polymers
US6500898B2 · kind B2 · utility
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7Claims
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Key dates
| Filing date | Apr 10, 2002 |
| Grant date | Dec 31, 2002 |
| Priority date | — |
| Expiry date | Apr 10, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S516/915
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A dispersant is prepared from an amine and a hydrocarbyl-substituted acylating agent, wherein the hydrocarbyl substituent is a polymerized olefin having a polydispersity {overscore (M)}w/{overscore (M)}n of greater than 5. Such polyolefin substituents are prepared by polymerization of olefins in the presence of a calcined catalyst comprising a partially or fully neutralized ammonium salt of a heteropolyacid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.