US4698408A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sag resistant two-component urethane adhesives with improved thermal stability
Assignee: Ashland LLC
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Filing: 1986-07-21
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Granted: 1987-10-06
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Expires: 2006-07-21
Abstract
Abstract An adhesive comprising a mixture of (A) a mixture of an isocyanate prepolymer and a polyepoxide which is essentially free of hydroxyl groups, and (B) a mixture of a polyol, a urethane catalyst and an epoxy curing catalyst and structures prepared by adhering substrates to one another by means of said adhesive are described.
Inventors
- 👤 Anil B. Goel
- 👤 Harvey J. Richards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:28
CPC Classifications
C; C09; C09J; C09J175/00; C09J175/04; C08; C08L; C08L63/00
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
39 words
An adhesive comprising a mixture of (A) A mixture of an isocyanate prepolymer and a polyepoxide which is essentially free of hydroxyl groups, and (B) A mixture of a polyol, a urethane curing catalyst and an epoxy curing catalyst.
Claim 2
Dependent Claim
39 words
An adhesive comprising a mixture of (A) A mixture of an isocyanate prepolymer and a polyepoxide which is essentially free of hydroxyl groups, and (B) A mixture of a polyol, a urethane curing catalyst and an epoxy curing catalyst.
Claim 3
Dependent Claim
33 words
The adhesive of claim 1 wherein the isocyanate prepolymer in (A) is one obtained by the reaction of poly (alkyalene oxide) diol with an excess on an equivalent basis of a poly isocyanate.
Claim 4
Dependent Claim
23 words
The adhesive of claim 2 wherein the poly epoxide of (A) is a compound containing more than one group of the formula: ##STR2##
Claim 5
Dependent Claim
27 words
The adhesive of claim 3 wherein the polyepoxide in (A) is present in from 2 to 30% by weight based on the weight of the isocyanate prepolymer.
Claim 6
Dependent Claim
32 words
The adhesive of claim 4 wherein the urethane catalyst in (B) is one selected from the group consisting of triethylene diamine, N,N', N"-tris (dimethylaminopropyl) hexahydrotriazine, dibutyltin dicarboxylates, stannous octoate and mixtures thereof.
Claim 7
Dependent Claim
35 words
The adhesive of claim 5 wherein the epoxy curing catalyst is one selected from the group consisting of tertiary amines, imidazoline, tetra alkyl ammonium halides, titanates, boron trifluoride-amine complexes, lithium chloride, phenolics and mixtures thereof.
Claim 8
Dependent Claim
34 words
The adhesive of claim 6 wherein the polyol of (B) is a compound having at least two hydroxyl groups per molecule and having an equivalent weight in the range of from 30 to 5,000.
Claim 9
Dependent Claim
35 words
The adhesive of claim 7 wherein the isocyanate prepolymer of (A) is one prepared by the reaction of methylene bis(phenyl isocyanate) with a poly(propylene oxide) diol and the polyepoxide is a diglycidyl ether of Bisphenol-A.
Claim 10
Dependent Claim
39 words
The adhesive of claim 7 wherein the polyol of (B) is obtained by reacting an excess of poly(propylene oxide) tetraol with toluene diisocyanate, the urethane catalyst is triethylene diamine and the epoxy curing agent is a boron trifluoride-ethylamine complex.
Claim 11
Dependent Claim
16 words
The adhesive of claim 10 wherein (B) also contains methyl trialkyl ammonium chloride epoxy curing catalyst.
Claim 12
Dependent Claim
40 words
The process for preparing a laminated structure comprising applying to at least one surface of a first substrate the adhesive of claim 1 and contacting said surface with the surface of a second substrate and allowing said adhesive to cure.
Claim 13
Dependent Claim
23 words
The process of claim 11 wherein the substrates are selected from the group consisting of fiber reinforced plastic, metal wood and combinations thereof.
Claim 14
Dependent Claim
13 words
The process of claim 12 wherein the substrates are fiberglass reinforced polyester panels.
References Cited (Backward Citations)
US4613660A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-10-05 | 1991-04-06 | 1991-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-10-05 | 1995-04-06 | 1995-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-10-05 | 1999-04-06 | 1999-10-06 | $7700.00 | Window Closed / Lapsed |