US4552934A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sag resistant at essentially 1:1 ratio two component adhesive
Assignee: Ashland LLC
•
Filing: 1981-04-06
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Granted: 1985-11-12
•
Expires: 2001-04-06
Abstract
Abstract Improved two component adhesives allowing the components to be mixed at essentially a 1:1 ratio, giving excellent sag resistance, low viscosity, excellent handling ability and satisfactory gel time, said adhesives being composed of a prepolymer composition and a curative composition that can be mixed preferably at 1:2 to 2:1 ratio and a curative composition composed of a mixture of a reaction product of a multiple hydroxyl polyol of relatively low equivalent weight with a small amount of an organic polyiisocyanate and a polyamine.
Inventors
- 👤 Thomas G. Rabito
- 👤 Richard L. Cline
- 👤 Stephen M. Oswalt
- 👤 Marvin T. Randleman
- 👤 Michael E. Kimball
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:03
CPC Classifications
C; C09; C09J; C09J175/00; C09J175/04; C09J175/12; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08G18/12
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
82 words
A two component adhesive composed of a polyurethane component containing 3 to 15 percent by weight of free NCO and a curative component composed of a mixture of 0.01 to 0.1 equivalents of a polyamine having a molecular weight less than about 1000 and 0.1 to 1.0 equivalent of a hydroxyl terminated prepolymer formed by reacting 0.1 to 1.5 equivalents of a 150 to 3000 molecular weight polyol having 2 to 6 hydroxyls with 0.1 to 0.4 equivalents of an organic polyisocyanate.
Claim 2
Dependent Claim
82 words
A two component adhesive composed of a polyurethane component containing 3 to 15 percent by weight of free NCO and a curative component composed of a mixture of 0.01 to 0.1 equivalents of a polyamine having a molecular weight less than about 1000 and 0.1 to 1.0 equivalent of a hydroxyl terminated prepolymer formed by reacting 0.1 to 1.5 equivalents of a 150 to 3000 molecular weight polyol having 2 to 6 hydroxyls with 0.1 to 0.4 equivalents of an organic polyisocyanate.
Claim 3
Dependent Claim
41 words
The adhesive of claim 1 having the characteristics, when the components are mixed in ratios of 1:2 to 2:1 of being sag resistant immediately after mixing and exhibiting a gel time of at least 2 to 120 minutes at 24° C.
Claim 4
Dependent Claim
11 words
The adhesive of claim 1 wherein the polyamine is a diamine.
Claim 5
Dependent Claim
27 words
The adhesive of claim 1 wherein the organic isocyanate is selected from the class consisting of toluene diisocyanate, monomeric and/or polymeric methylene di(phenyl isocyanate) and isophorone diisocyanate.
Claim 6
Dependent Claim
11 words
The adhesive of claim 4 wherein the polyamine is a diamine.
Claim 7
Dependent Claim
11 words
The adhesive of claim 5 wherein the diamine is ethylene diamine.
Claim 8
Dependent Claim
36 words
The adhesive of claim 1 wherein the hydroxyl terminated prepolymer of the curative is a reaction product of an organic polyisocyanate with a blend of polypropylene ether glycol with a polyol having 3 to 6 hydroxyls.
Claim 9
Dependent Claim
25 words
The adhesive of claim 1 wherein the organic polyisocyanate is selected from the class consisting of toluene diisocyanate and monomeric or polymeric methylene di(phenyl isocyanate).
Claim 10
Dependent Claim
28 words
The adhesive of claim 8 wherein the organic polyisocyanate is selected from the class consisting of toluene diisocyanate, polyaryl methane polyisocyanate and monomeric or polymeric methane di(phenyl isocyanate).
Claim 11
Dependent Claim
67 words
A curative for a two component adhesive composed of a mixture of 0.01 to 0.1 equivalents of a polyamine having a molecular weight less than about 1000 and 0.1 to 1.0 equivalents of a hydroxyl terminated prepolymer resulting from reacting of 0.1 to 1.5 equivalents of a 150 to 3000 molecular weight polyol having 2 to 6 hydroxyls with 0.1 to 0.4 equivalents of an organic polyisocyanate.
Claim 12
Dependent Claim
67 words
A curative for a two component adhesive composed of a mixture of 0.01 to 0.1 equivalents of a polyamine having a molecular weight less than about 1000 and 0.1 to 1.0 equivalents of a hydroxyl terminated prepolymer resulting from reacting of 0.1 to 1.5 equivalents of a 150 to 3000 molecular weight polyol having 2 to 6 hydroxyls with 0.1 to 0.4 equivalents of an organic polyisocyanate.
Claim 13
Dependent Claim
24 words
The curative of claim 10 wherein the hydroxyl terminated prepolymer is a reaction product of an organic polyisocyanate with a blend of two polyols.
References Cited (Backward Citations)
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US3663513A
Cited
US3666835A
Cited
US3730927A
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US3829533A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-11-11 | 1989-05-13 | 1989-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-11 | 1993-05-13 | 1993-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-11 | 1997-05-13 | 1997-11-12 | $7700.00 | Window Closed / Lapsed |