Method for preparing functionalized graft polymers
US9708422B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | Nov 25, 2014 |
| Grant date | Jul 18, 2017 |
| Priority date | — |
| Expiry date | Nov 25, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10N2070/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
An acylated hydrocarbon polymer is aminated by reacting a primary or secondary aromatic amine which is solid at room temperature with an acyl group of the polymer, by: supplying a melt of the acylated polymer; supplying a solution of the aromatic amine in a polar aprotic solvent which has a boiling point of at least about 15° C., a melting point below about 40° C., and a dielectric constant of at least about 5° at 25° C.; mixing the solution at 140° C. to 185° C.; and cooling the resulting amine-reacted polymer with a liquid while retaining the polar aprotic solvent in the polymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.