DE2042902A1
Expired / Lapsed
DE
⏱️ 0.0 years remaining
Flame resistant polyurethane foams - by reacting diphenylmethane polyisocyanate-4,4'-dihydrazinostilbene-2,2'-disulphinic acid reaction
Assignee: Bayer AG
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Filing: 1970-08-29
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Granted: —
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Expires: 1990-08-29
Abstract
Abstract Foam materials with carbodiimide groups are prepd. by reacting (I) a reaction product of a polyisocyanate of the diphenylmethane series with 1-10wt.% 4,41-dehydrazinostilbene-2,21-disulphonic acid, and opt. (II) an organic cpd. at least two active H atoms, with splitting out of carbon dioxide, in the presence of (III) a catalyst promoting the formation of carbodiimide groups. Gives foam materials with a good flame resistance and a good dimensional stability. Prolonged heating to cure the foam material is unnecessary.
Inventors
- 👤 Reinhard Dr Schliebs
Bibliographic Details
Application Number
—
Jurisdiction
DE
Data Source
google_patents
Last Synchronized
2026-11-04 20:58
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/02; C08G18/025; C08G18/06; C08G18/08; C08G18/0804; C08G18/0819; C08G18/0828; C08G18/09; C08G18/095; C08G18/70; C08G18/81; C08G18/8141; C08G18/815; C08G2101/00; C08G2110/00; C08G2110/0025; C08G2110/0041; C08G2110/005
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