Polyurethane spray systems having improved flame-retardant properties
US5567763A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Aug 15, 1994 |
| Grant date | Oct 22, 1996 |
| Priority date | — |
| Expiry date | Aug 15, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08G2150/50
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
This invention relates to a flame-retardant polyurethane spray system prepared by mixing at an isocyanate index of from 90 to 120 PA1 (A) an isocyanate composition containing PA2 (a) an organic polyisocyanate, and PA2 (b) 0 to 50 wt. %, relative to the organic polyisocyanate, of a halogen-containing organic flame retardant; and PA1 (B) an isocyanate-reactive composition containing PA2 (a) 10 to 80 wt. % of an isocyanate-reactive compound having a molecular weight of 400 to 10,000 and functionality of 2 to 7; PA2 (b) 1 to 50 wt. % of an isocyanate-reactive compound having a molecular weight less than 399 and functionality of 2 to 6; PA2 (c) 0 to 15 wt. % of an isocyanate-reactive tertiary amine polyether having a molecular weight of 100 to 1000; PA2 (d) 5 to 55 wt. % of a flame retardant other than a halogen-containing organic flame retardant, optionally in combination with a halogen-containing organic flame retardant, with the proviso that the weight ratio of the total amount of halogen-containing organic flame retardant in (A) and (B) to the amount of other flame retardants in (B) is from 0.4 to 1.5; PA2 (e) 0.01 to 1.5 wt. % of an organic metal catalyst or a mixture thereof with …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.