Storage-stable polyol compositions for producing rigid polyisocyanurate foam
US8557886B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 16, 2010 |
| Grant date | Oct 15, 2013 |
| Priority date | — |
| Expiry date | Mar 16, 2030 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2115/02
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Disclosed is a polyol composition comprising an aliphatic polyester polyol having a hydroxyl value of less than about 100 and prepared by the reaction of at least a polycarboxylic acid with a polyhydroxy compound; an aromatic polyester polyol; a Novolac-type polyether polyol; and a hydrofluorocarbon blowing agent; that may be storage-stable for at least 60 days. This composition may be reacted with a polyisocyanate at an isocyanate index of from about 2.5 to about 4 to form a rigid poly-isocyanurate foam. The foam shows improved cohesion in general and also improved adhesion and a reduced incidence of voids when applied to a metal substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.