Process for the continuous production of functionalized polymers
US6037445A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Dec 30, 1997 |
| Grant date | Mar 14, 2000 |
| Priority date | — |
| Expiry date | Dec 30, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01J2219/00166
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A continuous process for functionalizing polymers is disclosed, wherein (A) a liquid comprising the polymer and a gas comprising a functionalizing agent are continuously introduced into a dispersing zone operated in laminar flow with high intensity mixing of the liquid and the gas under functionalization conditions, wherein the mixing is conducted for a period of the dispersing zone residence time at a shear rate effective to form a stable gas-liquid dispersion in which the gas is substantially dissolved or dispersed in the liquid for functionalization, and wherein the shear rate is less than about 5 s.sup.-1 for no more than about 30% of the residence time; (B) the gas-liquid dispersion is continuously passed to a blending zone operated in laminar flow with low intensity mixing under functionalization conditions, wherein the mixing is conducted at a shear rate effective to further dissolve the gas into the liquid for further functionalization; and (C) continuously recovering functionalized polymer. The process can be used to carbonylate unsaturated polymers, and is particularly useful in reacting unsaturated polymers with carbon monoxide in the presence of a catalyst and a co-reac…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.