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US 4,061,579 AGranted
Intumescent coatings containing 4,4'-dinitrosulfanilide
AssigneeThe United States of America as represented by the Administrator of the National Aeronautics and Space Administration
InventorsPaul M. Sawko, Salvatore R. Riccitiello
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Abstract
An intumescent composition, which comprises a mixture of 4,4'-dinitrosulfanilide as the intumescent agent in a polymer binder mixture of a chlorinated polyolefin, a bisphenol A epoxy resin and a rubber-like amine hardener.
Claims10
An intumescent composition, which comprises:
- a mixture of 4,4'-dinitrosulfanilide as the intumescent agent in a polymeric binder mixture of a chlorinated polyolefin, a bisphenol A epoxy resin and a rubber-like amine hardener.
An intumescent composition, which comprises:
- a mixture of from 20-70 weight percent of 4,4' dinitrosulfanilide as an intumescent agent in 80-30 weight percent of a binder system of a chlorinated polyolefin having the formula:
- CH.sub.3 --CH.sub.2 --CCl.sub.2.sub.y --[CHCl -- CHCl.sub.x COOH
- wherein the ratio of y/x provides a chlorine content of 58-62 weight percent;
- a bisphenol A epoxy of the formula:
- ##STR6## wherein n = 1 and an amine hardener of the formula:
- ##STR7## wherein x = 5, y = 1, and m = 10.
3 more elements
Dependencies are inferred from the claim text.