US4338412A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intumescent compositions obtained by reacting polyisocyanates, phosphorus-containing substances and aromatic hydroxy carboxylic acids on salts
Assignee: Bayer AG
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Filing: 1981-06-23
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Granted: 1982-07-06
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Expires: 2001-06-23
Abstract
Abstract The present invention is directed to intumescent compositions, which may be foamed, obtained by reacting: (1) polyisocyanates, (2) phosphorus-containing condensation products having at least one hydroxyl group and obtained by condensing (i) primary or secondary aliphatic, cycloaliphatic, aromatic, araliphatic or heterocyclic monoamines and/or polyamines, which mono- and polyamines may contain OH groups, (ii) carbonyl compounds, and (iii) dialkyl phosphites, (3) aromatic hydroxy carboxylic acids or salts thereof, and (4) optionally, water and/or additional organic compounds containing isocyanate-reactive hydrogen atoms.
Inventors
- 👤 Wulf von Bonin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:25
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/34; C08G18/348; C08G18/08; C08G18/0804; C08G18/0819; C08G18/0823; C08G18/38; C08G18/3878; C08G18/3889; C08G18/40; C08G18/48; C08G18/50; C08G18/5075; C08G18/509; C08G2150/00; C08G2150/60
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
73 words
Intumescent compositions, which may be foamed, obtained by reacting: (1) polyisocyanates, (2) phosphorus-containing condensation products having at least one hydroxyl group and obtained by condensing (i) primary or secondary aliphatic, cycloaliphatic, aromatic, araliphatic or heterocyclic monoamines and/or polyamines, which mono- and polyamines may contain OH groups, (ii) carbonyl compounds, and (iii) dialkyl phosphites, (3) aromatic hydroxy carboxylic acids or salts thereof, and (4) optionally, water and/or additional organic compounds containing isocyanate-reactive hydrogen atoms.
Claim 2
Dependent Claim
73 words
Intumescent compositions, which may be foamed, obtained by reacting: (1) polyisocyanates, (2) phosphorus-containing condensation products having at least one hydroxyl group and obtained by condensing (i) primary or secondary aliphatic, cycloaliphatic, aromatic, araliphatic or heterocyclic monoamines and/or polyamines, which mono- and polyamines may contain OH groups, (ii) carbonyl compounds, and (iii) dialkyl phosphites, (3) aromatic hydroxy carboxylic acids or salts thereof, and (4) optionally, water and/or additional organic compounds containing isocyanate-reactive hydrogen atoms.
Claim 3
Dependent Claim
13 words
The compositions of claim 1 wherein, following condensation, said component (2) is alkoxylated.
Claim 4
Dependent Claim
72 words
The compositions of claim 1 obtained by reacting from 50 to 180 parts by weight of polyisocyanate with 100 parts by weight of a mixture comprising from 20 to 80% by weight of phosphorus-containing condensation products, from 10 to 65% by weight of hydroxy carboxylic acids or salts thereof, from 0 to 8.5% by weight of water, and from 0 to 50% by weight of additional organic compounds containing isocyanate-reactive hydrogen atoms.
Claim 5
Dependent Claim
25 words
The compositions of claim 1 or 3 characterized in that said polyisocyanates are of the type obtained by condensing aniline with formaldehyde, followed by phosgenation.
Claim 6
Dependent Claim
43 words
The compositions of claim 1 or 3 characterized in that the phosphorus-containing condensation products correspond to the following formula: (RO).sub.2 PO--CH.sub.2 --N--CHX--CH--OH).sub.2 wherein R represents C 1 -C 8 alkyl or C 1 -C 8 hydroxy alkyl, and X represents H or methyl.
Claim 7
Dependent Claim
19 words
The compositions of claim 1 characterized in that hydroxy benzoic acids are used as the aromatic hydroxy carboxylic acid.
References Cited (Backward Citations)
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1985-07-05 | 1986-01-04 | 1986-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-07-05 | 1990-01-04 | 1990-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-07-05 | 1994-01-04 | 1994-07-06 | $7700.00 | Window Closed / Lapsed |