Propylene ethylene random copolymer suitable for pipe
US10336840B2 · kind B2 · utility
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Key dates
| Filing date | Oct 28, 2014 |
| Grant date | Jul 2, 2019 |
| Priority date | — |
| Expiry date | Jan 29, 2035 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L11/125
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A composition is provided which comprises a propylene ethylene random copolymer having a melt flow rate (MFR) (as determined according to ASTM D1238, 230° C., 2.16 Kg) of less than 1 g/10 min, a xylene solubles content of less than 7% by weight, an ethylene content of from 3 to 5 percent by weight of the copolymer, and a value equal to or greater than 92 for the product of the Koenig B value times the % mm triads measured on the xylene insoluble fraction of the random copolymer obtained by the wet method. Pipes made from the composition demonstrate improved pressure endurance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.