US3903336A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Use of phosphorus-containing condensation products as flameproofing agents for fibre mixtures of polyester and cellulose
Assignee: Novartis AG
•
Filing: 1972-08-31
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Granted: 1975-09-02
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Expires: 1992-08-31
Abstract
Abstract The subject of the invention is the use of watersoluble condensation products of (a) 1 mol of a tetrakis-(hydroxymethyl)-phosphonium compound and (b) 0.02 to 1 mol, preferably 0.2 to 1 mol or especially 0.3 to 0.6 mol, of methylolated urea or its alkyl-ethers, preferably dimethylolurea, as flameproofing agents for fibre mixtures of polyester and cellulose.
Inventors
- 👤 Hermann Nachbur
- 👤 Arthur Maeder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:26
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/39; D06M15/423; D06M15/43; D06M15/431; D06M15/41; D06M15/415
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
76 words
A PROCESS FOR FLAMEPROOFING A POLYESTER-CELLULOSE FIBER MIXTURE, COMPRISING THE SEQUENTIAL STEPS OF TREATING THE MATERIAL WITH AN AQUEOUS PREPARATION WHICH ESSENTIALLY INCLUDES (1) A WATER-SOLUBLE CONDENSATION PRODUCT OBTAINED BY CONDENSING A TETRAKIS-(HYDRIXYMETHYL)-PHOSPHONIUM SALT OR TETRAKIS-(HYDROXYMETHYL)-PHOSPHONIUM HYDROXIDE AT 40* TO 120*C WITH 0.02 TO 1.0 MOLAR EQUIVALENT OF MONOMETHYLOLUREA OR DIMETHYLOLUREA AND (2) A POLYFUNCTIONAL AMINOPLAST PERCONDENSATE, AND CURING THE TREATED MATERIAL AT A TEMPERATURE IN THE RANGE OF 100* TO 200*C AFTER A DRYING STEP.
Claim 2
Dependent Claim
76 words
A PROCESS FOR FLAMEPROOFING A POLYESTER-CELLULOSE FIBER MIXTURE, COMPRISING THE SEQUENTIAL STEPS OF TREATING THE MATERIAL WITH AN AQUEOUS PREPARATION WHICH ESSENTIALLY INCLUDES (1) A WATER-SOLUBLE CONDENSATION PRODUCT OBTAINED BY CONDENSING A TETRAKIS-(HYDRIXYMETHYL)-PHOSPHONIUM SALT OR TETRAKIS-(HYDROXYMETHYL)-PHOSPHONIUM HYDROXIDE AT 40* TO 120*C WITH 0.02 TO 1.0 MOLAR EQUIVALENT OF MONOMETHYLOLUREA OR DIMETHYLOLUREA AND (2) A POLYFUNCTIONAL AMINOPLAST PERCONDENSATE, AND CURING THE TREATED MATERIAL AT A TEMPERATURE IN THE RANGE OF 100* TO 200*C AFTER A DRYING STEP.
Claim 3
Dependent Claim
29 words
The process of claim 1, wherein tetrakis-(hydroxymethyl)-phosphonium salt, dimethylolurea and methylolmelamine as aminoplast precondensate are used and curing at 100* to 200*C occurs during 30 seconds to 10 minutes.
Claim 4
Dependent Claim
30 words
The process of claim 1, wherein the condensation product is obtained by condensing a tetrakis-(hydroxymethyl)-phosphonium salt or hydroxide with monomethylolurea or dimethylolurea in the presence of an inert organic solvent.
Claim 5
Dependent Claim
22 words
The process of claim 1, wherein the molar equivalent of the monomethylolurea or dimethylolurea is in the range of 0.2 to 1.0.
Claim 6
Dependent Claim
16 words
The process of claim 1, wherein the tetrakis-(hydroxymethyl)-phosphonium compound is a tetrakis-(hydroxymethyl)-phosphonium salt or tetrakis-(hydroxymethyl)-phosphonium hydroxide.
Claim 7
Dependent Claim
18 words
The process of claim 1, wherein monomethylolurea or dimethylolurea are made from urea and formaldehyde during the condensation.
Claim 8
Dependent Claim
11 words
The process of claim 1, wherein the aminoplast precondensate is methylolmelamine.
Claim 9
Dependent Claim
14 words
The process of claim 3, wherein the inert organic solvent includes an aromatic hydrocarbon.
Claim 10
Dependent Claim
17 words
The process of claim 4, wherein the molar equivalent is in the range of 0.3 to 0.6.
Claim 11
Dependent Claim
13 words
The process of claim 5, wherein the tetrakis-(hydroxymethyl)-phosphonium salt is a tetrakis-(hydroxymethyl)-phosphonium halide.
Claim 12
Dependent Claim
11 words
The process of claim 10, wherein the tetrakis-(hydroxymethyl)-phosphonium halide is chloride.
Claim 13
Dependent Claim
19 words
The process of claim 11, wherein monomethylolurea or dimethylolurea and the molar equivalent thereof is about 0.5 are used.
Claim 14
Dependent Claim
22 words
The process of claim 7, wherein the methylolmelamine is at least partially etherified with an alkanol of 1 to 5 carbon atoms.
Claim 15
Dependent Claim
84 words
A mixed polyester-cellulose fiber material which has been provided with a flameproofing finish by a process comprising the sequential steps of treating the material with an aqueous preparation which essentially includes (1) a water-soluble condensation product obtained by condensing a tetrakis-(hydroxymEthyl)-phosphonium salt or tetrakis-(hydroxymethyl)-phosphonium hydroxide at 40 to 120*C with 0.02 to 1.0 molar equivalent of monomethylolurea or dimethylolurea and (2) a polyfunctional aminoplast precondensate, and curing the treated material at a temperature in the range of 100* to 200*C after a drying step.
Claim 16
Dependent Claim
84 words
A mixed polyester-cellulose fiber material which has been provided with a flameproofing finish by a process comprising the sequential steps of treating the material with an aqueous preparation which essentially includes (1) a water-soluble condensation product obtained by condensing a tetrakis-(hydroxymEthyl)-phosphonium salt or tetrakis-(hydroxymethyl)-phosphonium hydroxide at 40 to 120*C with 0.02 to 1.0 molar equivalent of monomethylolurea or dimethylolurea and (2) a polyfunctional aminoplast precondensate, and curing the treated material at a temperature in the range of 100* to 200*C after a drying step.
Claim 17
Dependent Claim
32 words
The mixed polyester-cellulose fiber material of claim 14, wherein tetrakis-(hydroxymethyl)-phosphonium salt, dimethylolurea and methylolmelamine as aminoplast precondensate are used and curing at 100* to 200*C occurs during 30 seconds to 10 minutes.
Claim 18
Dependent Claim
27 words
The mixed polyester-cellulose fiber material of claim 15, wherein the tetrakis-(hydroxymethyl)-phosphonium salt is tetrakis-(hydroxymethyl)-phosphonium chloride and the dimethylolurea is used in a molar equivalent of about 0.5.
References Cited (Backward Citations)
US2809941A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-09-01 | 1979-03-03 | 1979-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-01 | 1983-03-03 | 1983-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-01 | 1987-03-03 | 1987-09-02 | $7700.00 | Window Closed / Lapsed |