Crystalline propylene copolymer compositions having improved sealability and optical properties and reduced solubility
US6395831B1 · kind B1 · utility
14Cited by
4References
5Claims
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Key dates
| Filing date | Mar 30, 2000 |
| Grant date | May 28, 2002 |
| Priority date | — |
| Expiry date | Mar 30, 2020 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2314/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A crystalline propylene copolymer composition having MFR L values from 2 to 15 g/10 min. and comprising (percent by weight): A) 20-80% of one or more propylene copolymers; B) 20-80% of one or more propylene copolymers with different comonomer(s) content than in A); the said MFR L values (MFR L (2)) being obtained by subjecting to degradation a precursor composition comprising the same components A) and B) in the above said proportions, but having MFR L values (MFR L (1)) from 0.3 to 5 g/10 min., with a ratio MFR L (2) to MFR L (1) of from 2 to 20.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.