Abstract WHEREIN R is hydrogen, alkyl, haloalkyl, alkoxy, haloalkoxy, halo, nitro, acetamido, or sulfonamido. The remainder of the amine units, if any, are derived from urea, thiourea, ethylenureaa, melamine, guanidine, aminoguanidine, cyanamide, and/or dicyandiamide; and the aldehyde units are derived from an alkanal containing 1-5 carbon atoms. Compositions wherein the interpolymer is a sulfanilamide-formaldehyde copolymer are preferred. These compounds are coated onto substrates in any suitable manner to provide the articles of the invention. Intumescent compositions of the invention comprise amidealdehyde interpolymers wherein at least half of the amine units are derived from a sulfanilamide-type compound and preferably correspond to the formula:
AN ARTICLE WHICH COMPRISES A SUBSTRATE COATED WITH AN INTUMESCENT COMPOSITION COMPRISING AN INTERPOLYMER OF AT LEAST ONE AMINE WITH AN ALKALI CONTAINING 1-5 CARBON TOMS, AT LEAST HALF OF THE COMBINED AMINE UNITS OF THE INTERPOLYMER CORRESPONDING TO THE FORMULA:
Claim 2
Dependent Claim
41 words
AN ARTICLE WHICH COMPRISES A SUBSTRATE COATED WITH AN INTUMESCENT COMPOSITION COMPRISING AN INTERPOLYMER OF AT LEAST ONE AMINE WITH AN ALKALI CONTAINING 1-5 CARBON TOMS, AT LEAST HALF OF THE COMBINED AMINE UNITS OF THE INTERPOLYMER CORRESPONDING TO THE FORMULA:
Claim 3
Dependent Claim
31 words
The article of claim 1 wherein up to half of the combined amine units of the interpolymer are residues of urea, thiourea. ethyleneurea, melamine, guanidine, aminoguanidine, cyanamide, dicyandiamide or mixtures thereof.
Claim 4
Dependent Claim
17 words
The article of claim 1 wherein the interpolymer has a number average molecular weight of about 350-2,000.
Claim 5
Dependent Claim
9 words
The article of claim 1 wherein R is hydrogen.
Claim 6
Dependent Claim
17 words
The article of claim 1 wherein at least half of the combined amine units are sulfanilamide units.
Claim 7
Dependent Claim
19 words
The article of claim 1 wherein all of the combined amine units of the interpolymer correspond to the formula:
Claim 8
Dependent Claim
9 words
The article of claim 6 wherein R is hydrogen.
Claim 9
Dependent Claim
18 words
The article of claim 6 wherein all of the combined amine units of the interpolymer are sulfanilamide units.
Claim 10
Dependent Claim
10 words
The article of claim 1 wherein the alkanal is formaldehyde.
Claim 11
Dependent Claim
24 words
The article of claim 1 wherein the alkanal is formaldehyde and all of the combined amine units of the interpolymer correspond to the formula: