Propylene copolymer foams
US6800669B2 · kind B2 · utility
15Cited by
58References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 12, 2001 |
| Grant date | Oct 5, 2004 |
| Priority date | — |
| Expiry date | May 4, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2323/14
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A foam comprising a propylene copolymer material comprising at least 50 weight percent of units derived from propylene, based on the total propylene copolymer material, and units derived from ethylenically unsaturated comonomers and having a melt flow rate in the range of from 0.5 to 8 g/10 min, a melt strength of at least 5 cN, and a melt drawability of at least 20 mm/s, process for making a foam using such a propylene copolymer material, process for making a foam in the form of thermoplastic foam beads using such a propylene copolymer material, and an expandable composition comprising such a propylene copolymer material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.