Polyurethane and polyisocyanurate rigid foams prepared using ternary blowing agent mixtures
US5296516A · kind A · utility
8Cited by
4References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 9, 1992 |
| Grant date | Mar 22, 1994 |
| Priority date | — |
| Expiry date | Dec 9, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S521/91
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Use of a ternary blowing agent mixture containing water, HCFC-22, and either or both of methylene chloride or 1,1,1-trichloroethane allows the preparation of rigid urethane and polyisocyanurate foams displaying good dimensional stability and low aged k-factors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.