Gaskets made from olefin polymers
US5929128A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 8, 1996 |
| Grant date | Jul 27, 1999 |
| Priority date | — |
| Expiry date | Aug 8, 2016 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2200/0625
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Gaskets comprising either at least one homogeneously branched ethylene polymer or at least one elastic substantially linear ethylene polymer, at least one ethylene/carboxylic acid interpolymer; and at least one slip agent are disclosed. These gaskets may also contain enhanced polyethylenes produced by the direct polymerization of various combinations of novel elastic substantially linear olefin polymers in multiple reactors using either single or multiple catalysts. These gaskets may also be comprised of at least one ethylene polymer and at least one ionomer. The above mentioned gaskets may also contain slip agents and/or foaming agents. The gaskets are particularly useful for sealing food and liquid containers and do not contribute to taste and/or odor of the packaged product, which is especially useful in food-stuff applications. Gaskets comprising substantially linear ethylene polymers have processability similar to highly branched low density polyethylene (LDPE), but the strength and toughness of linear low density polyethylene (LLDPE).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.