Polypropylene compositions for stretched articles
US7947348B2 · kind B2 · utility
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14References
7Claims
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Key dates
| Filing date | Dec 15, 2006 |
| Grant date | May 24, 2011 |
| Priority date | — |
| Expiry date | Mar 29, 2028 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31913
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Polypropylene compositions, particularly suited for preparation of stretched/oriented articles, especially for injection stretch blow moulded bottles, comprising: A) one or more propylene homopolymers or propylene copolymers or their mixtures; B) from 500 to about 1500 ppm by weight of talc in form of particles having average particle diameter of equal to or less than 1.5 μm. Said compositions display higher crystallization temperature with respect to the same polyolefin (A) without addition of (B), while keeping good levels of transparency, particularly when (A) is or comprises a random polymer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.