Expandable polyolefin compositions and preparation process utilizing isobutane blowing agent
US4640933A · kind A · utility
48Cited by
16References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 27, 1986 |
| Grant date | Feb 3, 1987 |
| Priority date | — |
| Expiry date | May 27, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S521/91
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An expandable polyolefin composition and a method of preparation are provided. Isobutane or mixtures of isobutane with other physical blowing agents are utilized to expand polyolefin compositions which have been modified by the addition of a stability control agent. The composition has a high degree of dimensional stability and exhibits minimal shrinkage during curing and/or aging.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.