Polyolefins functionalized with maleic anhydride and with its high-boiling liquids esters, and their use as products with high compatibilizing power
US6451919B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 18, 2000 |
| Grant date | Sep 17, 2002 |
| Priority date | — |
| Expiry date | Oct 18, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08F255/00
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Described herein are polyolefins functionalized with maleic anhydrid and at least one high-boiling ester of the latter, and a process for their preparation in high yields, with high degrees of functionalization, without the production of by-products of cross-linking or degradation. The process, which may be carried out either continuously or discontinuously, is characterized by the use of inorganic substances having a specific porosity, grain size, density and humidity, as vehicles of the functionalizing monomers; the presence of maleic ester contributes to enhancing the reaction efficiency. Likewise described herein is a double-screw extruder devised for carrying out the said process, and the use of products obtained as compatibilizing additives in the field of adhesive and reinforcing polymers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.