US4766183A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermosetting composition for an interpenetrating polymer network system
Assignee: Essex Specialty Products LLC
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Filing: 1986-11-04
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Granted: 1988-08-23
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Expires: 2006-11-04
Abstract
Abstract A method for making a one package heat curable (i.e. thermosetting) composition which, on heating, forms a urethane/epoxy/silicone interpenetrating polymer network (IPN) system; one package heat curable compositions made by such a method; metal reinforcing patches, directly adherent to an oily metal surface such as an oily steel surface, comprising a sheet-like carrier having thereon such a one package heat curable composition in combination with a filler admixed therewith, said filler possibly including magnetic particles; a method for reinforcing metal which comprises applying thereto such a metal reinforcing patch and curing said heat curable composition at an elevated temperature to form a urethane/epoxy/silicone interpenetrating polymer network.
Inventors
- 👤 Sidky D. Rizk
- 👤 Navinchandra B. Shah
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:34
CPC Classifications
C; C08; C08L; C08L75/00; C08L75/04; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08G77/00; C08G77/42; C08G77/452; C08G77/458; C08L63/00; C09; C09J; C09J175/00; C09J175/04; C08G2270/00; Y; Y10; Y10S; Y10S525/00; Y10S525/903
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
74 words
A method for making a one package, heat crosslinkable composition which, on heating, forms an interpenetrating urethane/epoxy/silicone polymer network, which method comprises combining a polyepoxide compound and a thermo-reversibly blocked polyamine curing agent with an extended polyurethane prepolymer, free of isocyanate groups, prepared by thermo-reversibly blocking some of the isocyanate groups of a polyurethane prepolymer having a plurality of isocyanate groups and reacting the non-blocked isocyanate groups with a silicone polycarbinol and a polyol.
Claim 2
Independent Claim
74 words
A method for making a one package, heat crosslinkable composition which, on heating, forms an interpenetrating urethane/epoxy/silicone polymer network, which method comprises combining a polyepoxide compound and a thermo-reversibly blocked polyamine curing agent with an extended polyurethane prepolymer, free of isocyanate groups, prepared by thermo-reversibly blocking some of the isocyanate groups of a polyurethane prepolymer having a plurality of isocyanate groups and reacting the non-blocked isocyanate groups with a silicone polycarbinol and a polyol.
Claim 3
Dependent Claim
23 words
A method as in claim 1 wherein said polyurethane prepolymer is prepared by reacting an excess of an organic polyisocyanate with a polyol.
Claim 4
Dependent Claim
18 words
A method as in claim 2 wherein said polyol, reacted with said organic polyisocyanate, is a polyester polyol.
Claim 5
Dependent Claim
13 words
A method as in claim 3 wherein said polyester polyol is polycaprolactone polyol.
Claim 6
Dependent Claim
19 words
A method as in claim 1 wherein isocyanate groups of said polyurethane polymer are thermo-reversibly blocked with epsilon caprolactam.
Claim 7
Dependent Claim
19 words
A method as in claim 1 wherein said polyol, reacted with said non-blocked isocyanate groups, is a polyester polyol.
Claim 8
Dependent Claim
13 words
A method as in claim 6 wherein said polyester polyol is polycaprolactone diol.
Claim 9
Dependent Claim
15 words
A method as in claim 1 wherein said polyepoxide is a polyepoxide of bisphenol A.
Claim 10
Dependent Claim
16 words
A method as in claim 8 wherein said polyepoxide is a diglycidyl ether of bisphenol A.
Claim 11
Dependent Claim
24 words
A method as in claim 1 wherein said thermo-reversibly blocked polyamine curing agent is the reaction product of an acid anhydride and a polyamine.
Claim 12
Dependent Claim
23 words
A method as in claim 10 wherein said thermo-reversibly blocked polyamine curing agent is the reaction product of phthalic anhydride and diethylene triamine.
Claim 13
Dependent Claim
9 words
A composition made by the method of claim 1.
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) | 1991-08-23 | 1992-02-22 | 1992-08-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-23 | 1996-02-22 | 1996-08-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-23 | 2000-02-22 | 2000-08-23 | $7700.00 | Window Closed / Lapsed |