Method and composition for closed cell foam formation
US4362823A · kind A · utility
5Cited by
7References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 21, 1981 |
| Grant date | Dec 7, 1982 |
| Priority date | — |
| Expiry date | Aug 21, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S521/914
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Small amounts of ethoxylated (propoxylated propylene glycol) utilized as a surfactant/emulsifier for polyolisocyanate reaction systems for producing rigid foams that can produce at least 80% closed cell formation where the surfactant does not produce undesirable reaction products with the isocyanate and has an HLB less than 4.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.