Structure made from a thermoplastic composition of a polyolefin functionalised by polyether grafts and use thereof
US7820562B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 15, 2007 |
| Grant date | Oct 26, 2010 |
| Priority date | — |
| Expiry date | Feb 15, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/678
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to a structure comprising a substrate and at least one first layer applied to the substrate and made of a thermoplastic composition comprising at least one functionalized polyolefin obtained either by copolymerization or by grafting of a polyolefin backbone with an unsaturated monomer comprising an anhydride, acid or epoxide function, said functionalized polyolefin being grafted with polyether units comprising a terminal amine, by means of reactive extrusion, as a breathable waterproof material having a water vapor permeability of at least 300 g/m2 24 h−1 measured according to the standard ASTM E96, method BW (38° C./50% relative humidity), for a film of 25 μm.It also relates to the use of such a composition as a breathable waterproof material having a water vapor permeability of at least 300 g/m2 24 h−1 (measured according to the standard ASTM E96, method BW 38° C./50% relative humidity), for a film of 25 μm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.