Fluoro-functional polyethylene-polysiloxane block copolymers
US6316112A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Nov 17, 1999 |
| Grant date | Nov 13, 2001 |
| Priority date | — |
| Expiry date | Nov 17, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31913
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
This invention relates to anionically polymerized block copolymers comprised of at least one block of polyethylene and at least one block of a polymerized cyclic siloxane monomer wherein said cyclic siloxane monomer contains at least one functional group containing a fluorocarbon substituent, e.g., 2,4,6-tris(3,3,3-trifluoropropyl)-1,3,5-trimethylcyclotrisiloxane. The fluoro-functionality may instead be introduced into the polymer by using said siloxane monomer to end cap the polymer. These copolymers can be used in extruded release coating films prepared by blending the copolymer with a film grade polymer. They can also be used to modify surface adhesion, promote flow in polymer processing or coat a polymeric surface to impart properties such as a barrier to water vapor transmission, or solvent resistance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.