US4762880A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-based thermoforming adhesives
Assignee: ROYAL ADHESIVES AND SEALANTS LLC
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Filing: 1987-05-05
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Granted: 1988-08-09
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Expires: 2007-05-05
Abstract
Abstract This invention presents new water-based adhesives suitable for use in thermoforming lamination systems. More particularly, this invention presents water-based adhesive-forming compositions comprising an aromatic polyurethane in water dispersion or emulsion and a compatible cross-linking agent; also includable in the compositions are thickening agents and pigments. These new adhesives, it has been found, exhibit bonding strengths and temperature resistance far superior to the solvent and water-based adhesives currently used in industrial applications, and are useful in thermoforming lamination processes. Also disclosed is a one-step thermoform lamination edge-folding process using the adhesive.
Inventors
- 👤 Pak T. Leung
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:48
CPC Classifications
C; C09; C09J; C09J175/00; C09J175/04; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/0838; C08G18/0842; C08G18/0861; C08G18/0866; C08G18/10; C08G2170/00; C08G2170/80
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
101 words
An adhesive forming composition comprising: (a) an aqueous aromatic polyurethane emulsion or dispersion comprising a polyurethane compound of repeating urethane subunits, each having at least one aromatic substituent associated therewith; and (b) an effective amount of a cross-linking agent which is water-dispersible and stable in the presence of water yet being able to induce cross-linking of the polyurethane at room temperature at a rate sufficient to permit the composition to form an adhesive having suitable ultimate bond strength and green strength; said emulsion or dispersion having a sufficient solids content to enable the resultant adhesive to join and hold components together.
Claim 2
Dependent Claim
101 words
An adhesive forming composition comprising: (a) an aqueous aromatic polyurethane emulsion or dispersion comprising a polyurethane compound of repeating urethane subunits, each having at least one aromatic substituent associated therewith; and (b) an effective amount of a cross-linking agent which is water-dispersible and stable in the presence of water yet being able to induce cross-linking of the polyurethane at room temperature at a rate sufficient to permit the composition to form an adhesive having suitable ultimate bond strength and green strength; said emulsion or dispersion having a sufficient solids content to enable the resultant adhesive to join and hold components together.
Claim 3
Dependent Claim
18 words
The adhesive-forming composition of claim 1 wherein the emulsion or dispersion has a solids content ranging from 10-60%.
Claim 4
Dependent Claim
22 words
The adhesive-forming composition of claim 1 wherein the amount of cross-linking agent is between 0.1 and 20%, by weight, of the composition.
Claim 5
Dependent Claim
21 words
The adhesive-forming composition of claim 1 further comprising an effective amount of a thickener to increase the viscosity of said composition.
Claim 6
Dependent Claim
21 words
The adhesive-forming composition of claim 4 wherein the amount of thickener is between 0.1 and 5%, by weight, of the composition.
Claim 7
Dependent Claim
20 words
The adhesive-forming composition of claim 1 further comprising an effective amount of pigment to impart a color to said composition.
Claim 8
Dependent Claim
21 words
The adhesive-forming composition of claim 6, wherein the amount of pigment is between 0.1 and 10% by weight, of the composition.
Claim 9
Dependent Claim
18 words
The adhesive-forming composition of claim 1 wherein the cross-linking agent is a solvent-free, water-dispersible, unblocked organic isocyanate compound.
Claim 10
Dependent Claim
15 words
The adhesive-forming composition of claim 8 wherein the organic isocyanate compound is an aliphatic polyisocyanate.
Claim 11
Dependent Claim
13 words
A cross-linked polyurethane adhesive formed from the adhesive forming composition of claim 1.
Claim 12
Dependent Claim
13 words
The adhesive composition of claim 4 wherein the thickener is an acrylate thickener.
Claim 13
Dependent Claim
98 words
An adhesive-forming composition comprising: (a) an aqueous aromatic polyurethane emulsion or dispersion comprising a polyurethane compound of repeating urethane subunits, each having at least one aromatic substituent associated therewith; and (b) an effective amount of a cross-linking agent of a solvent-free, water-dispersible, unblocked organic isocyanate compound which is able to induce cross-linking of the polyurethane at room temperature at a rate sufficient to permit the composition to form an adhesive having suitable ultimate bond strength and green strength; said emulsion or dispersion having a sufficient solids content to enable the resultant adhesive to join and hold components together.
Claim 14
Dependent Claim
98 words
An adhesive-forming composition comprising: (a) an aqueous aromatic polyurethane emulsion or dispersion comprising a polyurethane compound of repeating urethane subunits, each having at least one aromatic substituent associated therewith; and (b) an effective amount of a cross-linking agent of a solvent-free, water-dispersible, unblocked organic isocyanate compound which is able to induce cross-linking of the polyurethane at room temperature at a rate sufficient to permit the composition to form an adhesive having suitable ultimate bond strength and green strength; said emulsion or dispersion having a sufficient solids content to enable the resultant adhesive to join and hold components together.
Claim 15
Dependent Claim
18 words
The adhesive-forming composition of claim 12 wherein the emulsion or dispersion has a solids content ranging from 10-60%.
Claim 16
Dependent Claim
22 words
The adhesive-forming composition of claim 12 wherein the amount of cross-linking agent is between 0.1 and 20% by weight, of the composition.
Claim 17
Dependent Claim
21 words
The adhesive-forming composition of claim 12 further comprising an effective amount of a thickener to increase the viscosity of said composition.
Claim 18
Dependent Claim
12 words
The adhesive-forming composition of claim 12 wherein the thickener is an acrylate.
Claim 19
Dependent Claim
21 words
The adhesive-forming composition of claim 15 wherein the amount of thickener is between 0.1 and 5%, by weight, of the composition.
Claim 20
Dependent Claim
21 words
The adhesive-forming composition of claim 12 further comprising an effective amount of a pigment to impart a color to said composition.
Claim 21
Dependent Claim
21 words
The adhesive-forming composition of claim 18 wherein the amount of pigment is between 0.1 and 10% by weight, of the composition.
Claim 22
Dependent Claim
15 words
The adhesive-forming composition of claim 12 wherein the organic isocyanate compound is an aliphatic polyisocyanate.
Claim 23
Dependent Claim
13 words
A cross-linked polyurethane adhesive formed from the adhesive forming composition of claim 12.
Claim 24
Dependent Claim
151 words
An adhesive-forming composition comprising: (a) an aqueous aromatic polyurethane emulsion or dispersion comprising a polyurethane compound of repeating urethane subunits, each having at least one aromatic substituent associated therewith; (b) a cross-linking agent in an amount of between 0.1 and 20%, by weight of the composition, of a solvent-free, water-dispersible, unblocked organic isocyanate compound which is able to induce cross-linking of the polyurethane at room temperature at a rate sufficient to permit the composition to form an adhesive having suitable ultimate bond strength and green strength; (c) between 0.1 and 5%, by weight of the composition, of a thickener to increase the viscosity of the composition; and (d) between 0.1 and 10%, by weight of the composition, of a pigment to impart a color to the composition; said emulsion or dispersion having a solids content of between 10 and 60% to enable the resultant adhesive to join and hold components together.
Claim 25
Dependent Claim
151 words
An adhesive-forming composition comprising: (a) an aqueous aromatic polyurethane emulsion or dispersion comprising a polyurethane compound of repeating urethane subunits, each having at least one aromatic substituent associated therewith; (b) a cross-linking agent in an amount of between 0.1 and 20%, by weight of the composition, of a solvent-free, water-dispersible, unblocked organic isocyanate compound which is able to induce cross-linking of the polyurethane at room temperature at a rate sufficient to permit the composition to form an adhesive having suitable ultimate bond strength and green strength; (c) between 0.1 and 5%, by weight of the composition, of a thickener to increase the viscosity of the composition; and (d) between 0.1 and 10%, by weight of the composition, of a pigment to impart a color to the composition; said emulsion or dispersion having a solids content of between 10 and 60% to enable the resultant adhesive to join and hold components together.
Claim 26
Dependent Claim
12 words
The adhesive-forming composition of claim 22 wherein the thickener is an acrylate.
Claim 27
Dependent Claim
15 words
The adhesive-forming composition of claim 22 wherein the organic isocyanate compound is an aliphatic polyisocyanate.
Claim 28
Dependent Claim
13 words
A cross-linked polyurethane adhesive formed from the adhesive forming composition of claim 22.
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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) | 1991-08-09 | 1992-02-08 | 1992-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-08-09 | 1996-02-08 | 1996-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-08-09 | 2000-02-08 | 2000-08-09 | $7700.00 | Window Closed / Lapsed |