Solventless polyurethane spray compositions and method for applying them
US4695618A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 23, 1986 |
| Grant date | Sep 22, 1987 |
| Priority date | — |
| Expiry date | May 23, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2150/50
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A method for preparing polyurethane by spraying solventless, equal volume mixtures of: PA0 (a) a liquid polyisocyanate; polyisocyanurate or isocyanate terminated quasi-prepolymer; and PA0 (b) a curing agent comprised of a blend of from about 0 to 15% of a polyamine having an equivalent weight from about 30 to about 200, about 10 to 20% of a low molecular weight glycol having an equivalent weight of from about 30 to 200, about 40 to 80% of a relatively high molecular weight polyol or polyamine having an equivalent weight of about 350 to 2000, and about 1 to 20% of a synthetic zeolite molecular sieve, wherein the average equivalent weight of (b) is from about 150 to 500.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.