US5124400A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aqueous polyurethane dispersions and adhesives based thereon
Assignee: Bayer Corp
•
Filing: 1989-09-25
•
Granted: 1992-06-23
•
Expires: 2009-09-25
Abstract
Abstract The invention is related to an adhesive comprising a stable, fine particle size aqueous dispersion of polyurethane-urea which is the reaction product of an isocyanate-terminated prepolymer with an amine-containing chain extending agent which is characterized in that the functionality of said agent is about 2.05 to about 2.50. The adhesive was surprisingly and unexpectedly found to exhibit an increased softening point temperature as compared to the corresponding temperature of related adhesives which contains no such chain extending agent.
Inventors
- 👤 Robin E. Tirpak
- 👤 Robert L. Cline
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:31
CPC Classifications
C; C09; C09J; C09J175/00; C09J175/04; C09J175/12; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/0804; C08G18/0838; C08G18/0842; C08G18/0861; C08G18/0866; C08G18/10; C08G18/12; C08G18/28; C08G18/2805; C08G18/2815; C08G18/283; C08G18/40; C08G18/48; C08G18/50; C08G18/5021; C08G18/5036; C08G18/5042; C08G18/70; C08G18/72; C08G18/77; C08G18/78; C08G18/7806; C08G18/7818; C08G2170/00; C08G2170/80
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
68 words
An adhesive comprising a stable, fine particle size aqueous dispersion of polyurethane-urea which is the reaction product of an isocyanate-terminated prepolymer with an amine-containing chain extending agent which is characterized in that (i) the functionality of said agent is about 2.05 to about 2.20, and (ii) the softening point temperature of said adhesive is greater than that of a corresponding adhesive which contains no such chain extending agent.
Claim 2
Dependent Claim
68 words
An adhesive comprising a stable, fine particle size aqueous dispersion of polyurethane-urea which is the reaction product of an isocyanate-terminated prepolymer with an amine-containing chain extending agent which is characterized in that (i) the functionality of said agent is about 2.05 to about 2.20, and (ii) the softening point temperature of said adhesive is greater than that of a corresponding adhesive which contains no such chain extending agent.
Claim 3
Dependent Claim
12 words
The adhesive of claim 1 wherein said agent comprises a hydrocarbon polyamine.
Claim 4
Dependent Claim
13 words
The adhesive of claim 2 wherein polyamine contains 2 to 15 carbon atoms.
Claim 5
Dependent Claim
34 words
The adhesive of claim 1 wherein said agent is at least one member selected from the group consisting of 1-amino-3-aminomethyl-3,5,5-trimethyl-cyclohexane, bis-(4-aminocyclohexyl)-methane, bis-(4-amino-3-methylcyclohexyl)-methane, 1,6-diaminohexane, ethylene diamine, diethylene triamine, triethylene tetramine, tetraethylene pentamine and pentaethylene hexamine.
Claim 6
Dependent Claim
30 words
The adhesive of claim 1 wherein the ratio between the terminal isocyanate groups of said prepolymer and amino hydrogens of said polyfunctional amine agent is between about 1.0:0.06 to 1.0:1.1.
References Cited (Backward Citations)
US4046729A
Cited
US4066591A
Cited
US4147679A
Cited
US4203883A
Cited
US4387181A
Cited
US4408008A
Cited
US4501852A
Cited
US4876302A
Cited
US4567228A
Cited
US4582873A
Cited
US4742095A
Cited
US4701480A
Cited
US4879322A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-06-23 | 1995-12-23 | 1996-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-06-23 | 1999-12-23 | 2000-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-06-23 | 2003-12-23 | 2004-06-23 | $7700.00 | Window Closed / Lapsed |