Coextrusion binder based on cografted metallocene polyethylene
US6528587B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 26, 2001 |
| Grant date | Mar 4, 2003 |
| Priority date | — |
| Expiry date | Mar 26, 2021 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2666/06
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention relates to a coextrusion binder comprising:5 to 35 parts of a polymer (A) which itself consists of a blend of 80 to 20 parts of a metallocene polyethylene (A1) of relative density between 0.865 and 0.915 and of 20 to 80 parts of a non-metallocene LLDPE polyethylene (A2), the blend of (A1) and (A2) being cografted by an unsaturated carboxylic acid;95 to 65 parts of a polyethylene (B) chosen from ethylene homopolymers or copolymers and elastomers; the blend of (A) and (B) being such that:the content of grafted unsaturated carboxylic acid is between 30 and 100 000 ppm,the MFI or melt flow index (ASTM D 1238 standard: 190° C./2.16 kg) is between 0.1 and 10 g/10 min.The present invention also relates to a multilayer structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.