US4003864A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intumescent composition
Assignee: Cities Service Co
•
Filing: 1976-07-02
•
Granted: 1977-01-18
•
Expires: 1996-07-02
Abstract
Abstract Intumescent amine-aldehyde copolymer compositions having improved UV stability are obtained by incorporating about 0.5-75% by weight of a polyol polyacrylate or polyol polymethacrylate into an intumescent composition comprising a low molecular weight, water-insoluble amine-aldehyde copolymer consisting essentially of repeating units which correspond to the formula: wherein Q is the residue of an alkanal containing 1-5 carbon atoms and R is hydrogen, alkyl, haloalkyl, alkoxy, haloalkoxy, halo, nitro, acetamido, or sulfonamido. The preferred compositions are those in which the amine-aldehyde copolymer is a sulfanilamide-formaldehyde copolymer and the polyol ester is a liquid ester.
Inventors
- 👤 Shirley H. Roth
- 👤 William S. Stoy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:36
CPC Classifications
C; C09; C09D; C09D161/00; C09D161/20; C09D161/22; C09D5/00; C09D5/18; Y; Y10; Y10S; Y10S260/00; Y10S260/24; Y10S428/00; Y10S428/92; Y10S428/921; Y10S521/00; Y10S521/907; 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
78 words
An intumescent composition comprising (A) a water-insoluble amine-aldehyde copolymer having a number average molecular weight of about 350-2000 and consisting essentially of repeating units corresponding to the formula: ##STR4##wherein Q is the residue of an alkanal containing 1-5 carbon atoms and R is hydrogen, alkyl, haloalkyl, alkoxy, haloalkoxy, halo, nitro, acetamido, or sulfonamido and (B) about 0.5-75%, based on the weight of the amine-aldehyde resin, of a polyol ester selected from the group consisting of polyacrylates and polymethacrylates.
Claim 2
Dependent Claim
78 words
An intumescent composition comprising (A) a water-insoluble amine-aldehyde copolymer having a number average molecular weight of about 350-2000 and consisting essentially of repeating units corresponding to the formula: ##STR4##wherein Q is the residue of an alkanal containing 1-5 carbon atoms and R is hydrogen, alkyl, haloalkyl, alkoxy, haloalkoxy, halo, nitro, acetamido, or sulfonamido and (B) about 0.5-75%, based on the weight of the amine-aldehyde resin, of a polyol ester selected from the group consisting of polyacrylates and polymethacrylates.
Claim 3
Dependent Claim
22 words
The composition of claim 1 wherein the concentration of polyol ester is about 1-60%, based on the weight of the amine-aldehyde resin.
Claim 4
Dependent Claim
22 words
The composition of claim 2 wherein the concentration of polyol ester is about 10-60%, based on the weight of the amine-aldehyde resin.
Claim 5
Dependent Claim
13 words
The composition of claim 1 wherein the polyol ester is a liquid ester.
Claim 6
Dependent Claim
20 words
The composition of claim 4 wherein the polyol ester is a diacrylate of a liquid diglycidyl ether of bisphenol A.
Claim 7
Dependent Claim
12 words
The composition of claim 4 wherein the polyol ester is trimethylolpropane triacrylate.
Claim 8
Dependent Claim
12 words
The composition of claim 4 wherein the polyol ester is pentaerythritol tetraacrylate.
Claim 9
Dependent Claim
12 words
The composition of claim 4 wherein the polyol ester is 1,6-hexanediol diacrylate.
Claim 10
Dependent Claim
13 words
The composition of claim 4 wherein the polyol ester is diethylene glycol diacrylate.
Claim 11
Dependent Claim
17 words
The composition of claim 1 wherein the repeating units of the copolymer correspond to the formula: ##STR5##
References Cited (Backward Citations)
US3912845A
Cited
US3922251A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-01-18 | 1980-07-19 | 1981-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-18 | 1984-07-19 | 1985-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-18 | 1988-07-19 | 1989-01-18 | $7700.00 | Window Closed / Lapsed |