US3755261A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Curing of amine curable polymers diamines with complexes of selected and alkali metal salts
Assignee: UNIROYAL
•
Filing: 1972-05-01
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Granted: 1973-08-28
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Expires: 1992-05-01
Abstract
Abstract Amine curable polymers are cured effectively by the use of complexes of 4,4''-methylene dianiline and/or racemic 2,3-di-(4aminophenyl) butane and selected alkali metal salts including sodium chloride.
Inventors
- 👤 Gulick N Van
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:43
CPC Classifications
C; C08; C08K; C08K5/00; C08K5/0091; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
110 words
A process for curing an amine curable polymer or prepolymer selected from the group consisting of urethanes containing free isocyanato groups, epoxy resins, halogen-containing hydrocarbon polymers, chloro sulfonated polymers, polymers containing acid halide and haloformate groups, polymers containing anhydride groups which on reaction with diamines, yield amide-acid linkages and organopolysiloxanes which comprises curing said polymer or prepolymer with a complex of 4,4''-methyledianiline and a salt, the salt 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 dianiline to said salt in said complex being 3 moles to 1 mole.
Claim 2
Dependent Claim
17 words
The process of claim 2 wherein said prepolymer or polymer is a urethane containing free isocyanato groups.
Claim 3
Dependent Claim
16 words
The process of claim 3 wherein said curing takes place at a temperature of about 100*-150*C.
Claim 4
Dependent Claim
20 words
The process of claim 4 wherein said curing takes place for a period of about 5 minutes to 24 hours.
Claim 5
Dependent Claim
16 words
The process of claim 4 wherein said complex is derived from 4,4''-methylene dianiline and sodium chloride.
Claim 6
Dependent Claim
16 words
The process of claim 6 wherein said complex is derived from 4,4''-methylene dianiline and lithium chloride.
Claim 7
Dependent Claim
5 words
The product of claim 1.
Claim 8
Dependent Claim
5 words
The product of claim 2.
Claim 9
Dependent Claim
5 words
The product of claim 4.
Claim 10
Dependent Claim
5 words
The product of claim 6.
Claim 11
Dependent Claim
160 words
A composition of matter comprising a mixture of particles of a complex dispersed in an amine curable prepolymer or polymer selected from the group consisting of urethanes containing free isocyanato groups, epoxy resins, halogen-containing hydrocarbon polymers, chloro sulfonated polymers, polymers containing acid halide and haloformate groups, polymers containing anhydride groups which on reaction with diamines, yield amide-acid linkages and organopolysiloxanes, said complex selected from the group consisting of racemic 2,3-di(4-aminophenyl)butane and a salt, said salt being selected from the group coNsisting of sodium chloride, sodium bromide, sodium iodide, potassium chloride, potassium bromide, potassium iodide, rubidium chloride, rubidium bromide, rubidium iodide, cesium chloride, cesium bromide and cesium iodide, and 4,4''-methylenedianiline and a salt, said salt being selected from the group consisting of sodium chloride, sodium bromide, sodium iodide, sodium nitrite, lithium chloride, lighium bromide, lithium iodide, lithium nitrite and sodium cyanide, the ratio of said dianiline and said butane to said salt in said complexes being 3 moles to 1 mole.
Claim 12
Dependent Claim
95 words
A composition of matter comprising a mixture of particles of a complex dispersed in an amine curable prepolymer or polymer selected from the group consisting of urethanes containing free isocyanato groups, epoxy resins, halogen-containing hydrocarbon polymers, chloro sulfonated polymers, polymers containing acid halide and haloformate groups, polymers containing anhydride groups which on reaction with diamines, yield amide-acid linkages and organo-polysiloxanes, said complex comprising 4,4''-methylenedianiline and a salt, said salt 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.
Claim 13
Dependent Claim
18 words
The composition of claim 13 wherein said particles of complex are about 1 to 150 microns in size.
Claim 14
Dependent Claim
18 words
The composition of claim 13 wherein said amine curable prepolymer or polymer is urethane containing free isocyanato groups.
Claim 15
Dependent Claim
11 words
The composition of claim 15 wherein said salt is sodium chloride.
References Cited (Backward Citations)
US3527744A
Cited
US3565972A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-27 | 1977-02-26 | 1977-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-27 | 1981-02-26 | 1981-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-27 | 1985-02-26 | 1985-08-28 | $7700.00 | Window Closed / Lapsed |