Propylene/ethylene copolymer film for heat seal
US11254848B2 · kind B2 · utility
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11Claims
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Key dates
| Filing date | Jul 27, 2012 |
| Grant date | Feb 22, 2022 |
| Priority date | — |
| Expiry date | Jul 27, 2032 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31938
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present disclosure provides compositions, films and articles containing a random propylene/ethylene copolymer and a substituted phenylene aromatic diester. Polymerization with an improved catalyst system increases the amount of ethylene incorporated into the random propylene/ethylene copolymer backbone which results in improved thermal properties, improved optical properties, and improved heat seal properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.