Process for the production of open-cell, cold-formable rigid polyurethane foams and their use for the production of molded articles
US5219893A · kind A · utility
16Cited by
27References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 11, 1991 |
| Grant date | Jun 15, 1993 |
| Priority date | — |
| Expiry date | Jan 11, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2110/0083
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Open-celled, cold-formable polyurethane foams are made by reacting a specific crude MDI with a polyol component which includes hydroxyl polyethers having an OH number of from about 28 to about 600, a difunctional phthalic acid hydroxyl polyester having an OH number of from about 150 to about 440, glycerol, a blowing agent (water is preferred), a tertiary amine catalyst and optionally a silicone foam stabilizer. These foams generally have a density of from about 23 to about 30 kg/m.sup.3 and may be molded into articles having intricate shapes (e.g., roof for automobiles) using known cold-forming techniques.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.