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US4293657A
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Stable melamine polyol dispersions, a process for their manufacture and for the preparation of foamed polyurethane plastics
Assignee: BASF SE
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Filing: 1980-07-07
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Granted: 1981-10-06
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Expires: 2000-07-07
Abstract
Abstract Stable melamine-polyoxyalkylene polyether polyol dispersions are prepared by the in situ reduction of melamine particles wherein 90 percent of the melamine particles have a particle size of less than 10 microns. Stabilizers for the melamine-polyol dispersion are selected from the group consisting of (a) silicic acids and silicates, (b) salts of perfluorinated alkyl carboxylic acids having 4 to 20 carbon atoms, salts of alkyl sulfonic acids and perfluorinated alkylsulfonic acids having 4 to 20 carbon atoms and polyperfluoroether polyols having molecular weights of 300 to 6000, and (c) salts of fatty alcohol sulfates having 6 to 30 carbon atoms. These dispersions are useful for the preparation of polyurethane foams.
Inventors
- 👤 Dietmar Nissen
- 👤 Matthias Marx
- 👤 Wolfgang Jarre
- 👤 Ernst Schoen
- 👤 Walter Decker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:01
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/0014; C08J9/0028; C08K; C08K3/00; C08K3/34; C08K5/00; C08K5/16; C08K5/34; C08K5/3467; C08K5/3477; C08K5/3492; C08K5/34922; C08J2375/00; C08J2375/04
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
144 words
A stable melamine-polyol dispersion consisting of (A) 5 to 70 percent by weight of melamine based on the total weight of melamine and polyoxyalkylene polyether polyol with 90 percent of the melamine particles having a particle size of less than 10 microns, (B) 95 to 30 percent by weight of a polyoxyalkylene polyether polyol based on the weight of melamine and polyol, said polyoxyalkylene polyether polyol having a molecular weight of 200 to 16,000, and (C) an effective amount of a stabilizer selected from the group consisting of (a) silicic acids and silicates, (b) salts of perfluorinated alkyl carboxylic acids having 4 to 20 carbon atoms; salts of alkyl sulfonic acids and perfluorinated alkylsulfonic acids having 4 to 20 carbon atoms and polyperfluoroether polyols having molecular weights of 300 to 6000, and (c) salts of fatty alcohol sulfates having 6 to 30 carbon atoms.
Claim 2
Dependent Claim
144 words
A stable melamine-polyol dispersion consisting of (A) 5 to 70 percent by weight of melamine based on the total weight of melamine and polyoxyalkylene polyether polyol with 90 percent of the melamine particles having a particle size of less than 10 microns, (B) 95 to 30 percent by weight of a polyoxyalkylene polyether polyol based on the weight of melamine and polyol, said polyoxyalkylene polyether polyol having a molecular weight of 200 to 16,000, and (C) an effective amount of a stabilizer selected from the group consisting of (a) silicic acids and silicates, (b) salts of perfluorinated alkyl carboxylic acids having 4 to 20 carbon atoms; salts of alkyl sulfonic acids and perfluorinated alkylsulfonic acids having 4 to 20 carbon atoms and polyperfluoroether polyols having molecular weights of 300 to 6000, and (c) salts of fatty alcohol sulfates having 6 to 30 carbon atoms.
Claim 3
Dependent Claim
18 words
The dispersion of claim 1 wherein the polyoxyalkylene polyether polyol has a molecular weight of 200 to 8000.
Claim 4
Dependent Claim
22 words
The dispersion of claim 1 wherein the stabilizer is 0.001 to 20 percent by weight based on the weight of the melamine.
Claim 5
Dependent Claim
162 words
A process for the preparation of a stable melamine-polyol dispersion wherein a mixture of (A) 5 to 70 percent by weight of melamine, based on the total weight of melamine and polyoxyalkylene polyether polyol, (B) 95 to 30 percent by weight of a polyoxyalkylene polyether polyol based on the total weight of melamine and polyol in the presence of (C) an effective amount of a stabilizer selected from the group consisting of (a) silicic acids and silicates, (b) salts of perfluorinated alkylcarboxylic acids having 4 to 20 carbon atoms; salts of alkylsulfonic acids and perfluorinated alkylsulfonic acids having 4 to 20 carbon atoms and polyperfluoroether polyols having molecular weights of 300 to 6000, and (c) salts of fatty alcohol sulfates having 6 to 30 carbon atoms, is reduced in situ using high local energy densities in such a manner that 90 percent of the melamine particles have a particle size of less than 10 microns and that the materials are simultaneously dispersed.
Claim 6
Dependent Claim
162 words
A process for the preparation of a stable melamine-polyol dispersion wherein a mixture of (A) 5 to 70 percent by weight of melamine, based on the total weight of melamine and polyoxyalkylene polyether polyol, (B) 95 to 30 percent by weight of a polyoxyalkylene polyether polyol based on the total weight of melamine and polyol in the presence of (C) an effective amount of a stabilizer selected from the group consisting of (a) silicic acids and silicates, (b) salts of perfluorinated alkylcarboxylic acids having 4 to 20 carbon atoms; salts of alkylsulfonic acids and perfluorinated alkylsulfonic acids having 4 to 20 carbon atoms and polyperfluoroether polyols having molecular weights of 300 to 6000, and (c) salts of fatty alcohol sulfates having 6 to 30 carbon atoms, is reduced in situ using high local energy densities in such a manner that 90 percent of the melamine particles have a particle size of less than 10 microns and that the materials are simultaneously dispersed.
Claim 7
Dependent Claim
20 words
The process of claim 4 wherein the local energy densities amount to 10 to 3000 kilowatt hours per cubic meter.
Claim 8
Dependent Claim
23 words
The process of claim 4 wherein the stabilizer is 0.001 to b 20 percent by weight based on the weight of the melamine.
Claim 9
Dependent Claim
67 words
In a process for the preparation of polyurethane foams by reaction of a polyoxyalkylene polyether polyol with an organic polyisocyanate, the improvement which comprises employing as the polyol component a melamine-polyol dispersion wherein the melamine is 5 to 70 percent by weight based on the total weight of melamine and polyol, wherein 90 percent of said melamine particles have a particle size of less than 10 microns.
Claim 10
Dependent Claim
67 words
In a process for the preparation of polyurethane foams by reaction of a polyoxyalkylene polyether polyol with an organic polyisocyanate, the improvement which comprises employing as the polyol component a melamine-polyol dispersion wherein the melamine is 5 to 70 percent by weight based on the total weight of melamine and polyol, wherein 90 percent of said melamine particles have a particle size of less than 10 microns.
Claim 11
Dependent Claim
77 words
The process of claim 7 wherein the melamine-polyol dispersion is stabilized with an effective amount of stabilizer selected from the group consisting of (a) silicic acids and silicates, (b) salts of perfluorinated alkylcarboxylic acids having 4 to 20 carbon atoms; salts of alkylsulfonic acids and perfluorinated alkylsulfonic acids having 4 to 20 carbon atoms and polyperfluoroether polyols having molecular weights of 300 to 6000, and (c) salts of fatty alcohol sulfates having 6 to 30 carbon atoms.
Claim 12
Dependent Claim
22 words
The process of claim 7 wherein the stabilizer is 0.001 to 20 percent by weight based on the weight of the melamine.
Claim 13
Dependent Claim
66 words
In the composition of polyurethane foam comprising the reaction product of a polyoxyalkylene polyether polyol with an organic polyisocyanate, the improvement which comprises employing as the polyol component a melamine-polyol dispersion wherein the melamine is 5 to 70 percent by weight based on the total weight of melamine and polyol, wherein 90 percent of said melamine particles have a particle size of less than 10 microns.
Claim 14
Dependent Claim
66 words
In the composition of polyurethane foam comprising the reaction product of a polyoxyalkylene polyether polyol with an organic polyisocyanate, the improvement which comprises employing as the polyol component a melamine-polyol dispersion wherein the melamine is 5 to 70 percent by weight based on the total weight of melamine and polyol, wherein 90 percent of said melamine particles have a particle size of less than 10 microns.
Claim 15
Dependent Claim
77 words
The composition of claim 10 wherein the melamine-polyol dispersion is stabilized with an effective amount of stabilizer selected from the group consisting of (a) silicic acids and silicates, (b) salts of perfluorinated alkylcarboxylic acids having 4 to 20 carbon atoms; salts of alkylsulfonic acids and perfluorinated alkylsulfonic acids having 4 to 20 carbon atoms and polyperfluoroether polyols having molecular weights of 300 to 6000, and (c) salts of fatty alcohol sulfates having 6 to 30 carbon atoms.
Claim 16
Dependent Claim
22 words
The composition of claim 10 wherein the stabilizer is 0.001 to 20 percent by weight based on the weight of the melamine.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-10-05 | 1985-04-06 | 1985-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-05 | 1989-04-06 | 1989-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-05 | 1993-04-06 | 1993-10-06 | $7700.00 | Window Closed / Lapsed |