Polymer resins with improved environmental stress crack resistance
US7230054B2 · kind B2 · utility
31Cited by
16References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 29, 2004 |
| Grant date | Jun 12, 2007 |
| Priority date | — |
| Expiry date | Jan 1, 2025 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2205/025
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Resins comprising a relatively high-density, low-molecular-weight polyethylene component and a relatively low-density, high-molecular-weight ethylene copolymer component and methods of making the resins are disclosed. The rheological polydispersity of the high-density component exceeds that of either the resin or the low-density component. The resins are valuable for making films, sheets, coatings, pipes, fibers, and molded articles having a favorable balance of good stiffness and excellent environmental stress crack resistance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.