Process for making a dimensionally-stable open-cell polypropylene foam with organic blowing agents
US5348795A · kind A · utility
69Cited by
10References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 7, 1994 |
| Grant date | Sep 20, 1994 |
| Priority date | — |
| Expiry date | Jan 7, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/249993
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Disclosed is a process for making a low density, dimensionally-stable, open-cell, extruded propylene polymer foam comprising primarily an expanded propylene polymer material wherein the foam has a blowing agent comprising greater than 85 percent by weight of one or more organic blowing agents based upon the total weight of the blowing agent. The propylene polymer material comprises more than 50 weight percent or more of propylene monomeric units based upon the total weight of the propylene polymer material. The foam has a density about 96 kilograms or less per cubic meter. The foam is greater than 20 percent open cell.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.