US3900447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermally activated promoters for salt complex curing agents
Assignee: Uniroyal Chemical Co Inc
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Filing: 1974-04-30
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Granted: 1975-08-19
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Expires: 1994-04-30
Abstract
Abstract NCO-terminated urethane polymers or prepolymers are cured effectively by heating with (1) a complex of 4,4''methylenedianiline and/or racemic 2,3-di(4-amino-phenyl)butane and selected alkali metal salts, especially sodium chloride, and (2) a urea channel inclusion complex.
Inventors
- 👤 Gulick Norman Martin Van
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:39
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
138 words
IN A PROCESS WHEREIN A URETHANE PREPOLYMER CONTAINING FREE ISOCYANATO GROUPS IS HEATED IN CONTACT WITH A COMPLEX OF 4,4''-METHYLENEDIANILINE AND A SALT TO A TEMPERATURE SUFFICIENT TO CURE THE PREPOLYMER, THE SALT COMPONENT OF THE COMPLEX BEING SELECTED FROM THE GROUP CONSISTING OF SODIUM CHLORIDE, SODIUM BROMIDE, SODIUM IODIDE, SODIUM NITRITE, LITHIUM CHLORIDE, LITHIUM BROMIDE, LITHIUM IODIDE, LITHIUM NITRITE, AND SODIUM CYANIDE, THE RATIO OF SAID 4,4''-METHYLENEDIANILINE TO SALT IN SAID COMPLEX BEING 3 MOLE, THE IMPROVEMENT COMPRISING EMPLOYING THE AFORESAID COMPLEX IN MIXTURE WITH A UREA CHANNEL INCLUSION COMPLEX, THE LATTER BEING EMPLOYED IN AN AMOUNT OF ABOUT 0.1-10% BY WEIGHT OF THE TOTAL WEIGHT OF THE PREPOLYMER AND BOTH COMPLEXES, AND HEATING THE RESULTING DISPERSION OF PREPOLYMER AND BOTH COMPLEXES TO A CURING TEMPERATURE OF ABOUT 60*-140*C., WHEREBY THE UREA CHANNEL INCLUSION COMPLEX IS DECOMPOSED.
Claim 2
Dependent Claim
138 words
IN A PROCESS WHEREIN A URETHANE PREPOLYMER CONTAINING FREE ISOCYANATO GROUPS IS HEATED IN CONTACT WITH A COMPLEX OF 4,4''-METHYLENEDIANILINE AND A SALT TO A TEMPERATURE SUFFICIENT TO CURE THE PREPOLYMER, THE SALT COMPONENT OF THE COMPLEX BEING SELECTED FROM THE GROUP CONSISTING OF SODIUM CHLORIDE, SODIUM BROMIDE, SODIUM IODIDE, SODIUM NITRITE, LITHIUM CHLORIDE, LITHIUM BROMIDE, LITHIUM IODIDE, LITHIUM NITRITE, AND SODIUM CYANIDE, THE RATIO OF SAID 4,4''-METHYLENEDIANILINE TO SALT IN SAID COMPLEX BEING 3 MOLE, THE IMPROVEMENT COMPRISING EMPLOYING THE AFORESAID COMPLEX IN MIXTURE WITH A UREA CHANNEL INCLUSION COMPLEX, THE LATTER BEING EMPLOYED IN AN AMOUNT OF ABOUT 0.1-10% BY WEIGHT OF THE TOTAL WEIGHT OF THE PREPOLYMER AND BOTH COMPLEXES, AND HEATING THE RESULTING DISPERSION OF PREPOLYMER AND BOTH COMPLEXES TO A CURING TEMPERATURE OF ABOUT 60*-140*C., WHEREBY THE UREA CHANNEL INCLUSION COMPLEX IS DECOMPOSED.
Claim 3
Dependent Claim
47 words
The process of claim 1 wherein said complex of 4,4''-methylenedianiline and a salt is replaced by a complex of racemic 2,3-di(4-aminophenyl)butane with sodium chloride, sodium bromide, sodium iodide, potassium chloride, potassium bromide, potassium iodide, rubidium chloride, rubidium bromide, rubidium iodide, cesium chloride, cesium bromide, or cesium iodide.
Claim 4
Dependent Claim
16 words
The process of claim 1 wherein said curing takes place at a temperature of about 80*-130*C.
Claim 5
Dependent Claim
15 words
The process of claim 1 wherein said complex is derived from 4,4''-methylenedianiline and sodium chloride.
Claim 6
Dependent Claim
15 words
The process of claim 1 wherein said complex is derived from 4,4''-methylenedianiline and lithium chloride.
Claim 7
Dependent Claim
47 words
The process of claim 1 wherein said urea channel inclusion complex contains a guest molecule selected from the group consisting of a long chain fatty acid, a long chain alcohol, a long chain diol, a straight chain hydrocarbon, an ether, an ester, a halide, and an olefin.
Claim 8
Dependent Claim
26 words
The process of claim 1 wherein said urea channel inclusion complex contains a guest molecule selected from the group consisting of stearic acid and its derivatives.
Claim 9
Dependent Claim
12 words
The process of claim 7 wherein said guest molecule is 2-butoxyethyl stearate.
Claim 10
Dependent Claim
22 words
The process of claim 1 wherein said urea channel inclusion complex contains a guest molecule which is an activator for said curing.
Claim 11
Dependent Claim
23 words
The process of claim 1 wherein said urea channel inclusion complex contains a guest molecule which is not an activator for said curing.
Claim 12
Dependent Claim
115 words
A composition of matter consisting essentially of a urethane prepolymer containing free isocyanato groups, said prepolymer having dispersed therein (a) a salt complex consisting essentially of 4,4''-methylenedianiline and a salt selected from the group consisting of sodium chloride, sodium bromide, sodium iodide, sodium nitrite, lithium chloride, lithium bromide, lithium iodide, lithium nitrite, and sodium cyanide, the ratio of said 4,4''-methylenedianiline to said salt in said complex being 3 moles to 1 mole, and (b) a urea channel inclusion complex which decomposes at about 60*-140*C. when dispersed in said urethane prepolymer, said urea channel inclusion complex being present in an amount of about 0.1-10% by weight of the total weight of the prepolymer and both complexes.
Claim 13
Dependent Claim
115 words
A composition of matter consisting essentially of a urethane prepolymer containing free isocyanato groups, said prepolymer having dispersed therein (a) a salt complex consisting essentially of 4,4''-methylenedianiline and a salt selected from the group consisting of sodium chloride, sodium bromide, sodium iodide, sodium nitrite, lithium chloride, lithium bromide, lithium iodide, lithium nitrite, and sodium cyanide, the ratio of said 4,4''-methylenedianiline to said salt in said complex being 3 moles to 1 mole, and (b) a urea channel inclusion complex which decomposes at about 60*-140*C. when dispersed in said urethane prepolymer, said urea channel inclusion complex being present in an amount of about 0.1-10% by weight of the total weight of the prepolymer and both complexes.
Claim 14
Dependent Claim
16 words
The composition of claim 11 wherein the salt complex is derived from 4,4''-methylenedianiline and sodium chloride.
Claim 15
Dependent Claim
16 words
The composition of claim 11 wherein the salt complex is derived from 4,4''-methylenedianiline and lithium chloride.
Claim 16
Dependent Claim
30 words
The composition of claim 11 wherein said urea channel inclusion complex constitutes about 0.5-2% by weight of the total weight of the salt complex, urea channel inclusion complex, and prepolymer.
Claim 17
Dependent Claim
18 words
The composition of claim 11 wherein the urea channel inclusion complex is composed of urea and 2-butoxyethyl stearate.
References Cited (Backward Citations)
US3755261A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |