Smoke and toxic gas suppressant composition
US4966920A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 19, 1989 |
| Grant date | Oct 30, 1990 |
| Priority date | — |
| Expiry date | Jan 19, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L75/04
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
The present invention provides a composition comprising a combustible material containing urethane linkages; and as a smoke and toxic gas suppressant, a polyester which has an acid value below 30 mg KOH/g, preferably below 10 mg KOH/g, and which is derived from: PA0 Ia.[A] a component which contains 4 carboxyl groups or anhydride thereof, and which is preferably an aromatic component, or PA0 Ib. a mixture of [A] and [B]: PA0 [B] one or more components which contain 2 to 12, preferably 2 to 4, carboxyl groups or 1 to 6, preferably 1 or 2, carboxylic anhydride groups, selected from: PA0 [B.sub.1 ] an aliphatic carboxylic acid compnent containing 2-16 carbon atoms; [[B.sub.2 ] a cyclic non-aromatic carboxylic acid containing 7-17 carbon atoms; and PA0 [B.sub.3 ] an aromatic carboxylic acid containing 8-16 carbon atoms; and PA0 II.[C] at least one aliphatic, cycloaliphatic or aromatic polyhydroxyl component containing 2 to 8 hydroxyl groups, and the amount of polyester is from to 50 100% based on the weight of polyol used to make the combustible material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.