Polyol blends for producing hydrocarbon-blown polyurethane and polyisocyanurate foams
US5922779A · kind A · utility
58Cited by
15References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 10, 1997 |
| Grant date | Jul 13, 1999 |
| Priority date | — |
| Expiry date | Oct 10, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2375/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Disclosed are aromatic polyester polyols, polyester polyol resin blends, methods for preparing such compositions and polyurethane and polyisocyanurate foams made using the compositions, wherein the resin blends generally comprise: PA1 (a) an aromatic polyester polyol formed by a reaction between a phthalic acid based material; a hydroxylated material having a functionality of at least 2; and a hydrophobic material; PA1 (b) a nonionic surfactant; and PA1 (c) a C.sub.4 -C.sub.7 hydrocarbon blowing agent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.