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US3912845A Expired / Lapsed US ⏱️ 0.0 years remaining

Article comprising a substrate coated with an aminobenzenesulfonamide-aldehyde interpolymer intumescent composition

Assignee: Cities Service Oil Co
•
Filing: 1974-01-21
•
Granted: 1975-10-14
•
Expires: 1994-01-21
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Abstract

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:

Inventors

  • 👤 Shirley H Roth

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-30 02:47
CPC Classifications
C; C08; C08G; C08G12/00; C08G12/02; C08G12/04; C08G12/24; C09; C09D; C09D5/00; C09D5/18; C09D5/185; Y; Y10; Y10S; Y10S260/00; Y10S260/24; Y10S428/00; Y10S428/92; Y10S428/921; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678; Y10T428/31688; Y10T428/31942; Y10T428/31949; Y10T428/31957; Y10T428/3196; Y10T428/31964; Y10T428/31967

Claims Analysis

Total Claims: 11
Claim 1
Independent 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 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:

References Cited (Backward Citations)

US2771379A Cited
US3536648A Cited
US3535130A Cited
US3663463A Cited
US3702841A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1978-10-13 1979-04-14 1979-10-14 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-10-13 1983-04-14 1983-10-14 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-10-13 1987-04-14 1987-10-14 $7700.00 Window Closed / Lapsed

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