Patent US3923713A successfully refreshed from Google Patents.
US3923713A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-yellowing textile adhesive
Assignee: Wyeth Holdings LLC
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Filing: 1974-03-08
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Granted: 1975-12-02
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Expires: 1994-03-08
Abstract
Abstract Yellowing of textile adhesives, which are aqueous dispersions of a particular class of isocyanate-terminated polyurethane prepolymers having pendant carboxyl groups added to water containing a tertiary aliphatic amine, can be substantially reduced by adding a relatively small quantity of a suitable organic monoisocyanate to the adhesive composition along with a commercial antioxidant and UV absorber.
Inventors
- 👤 David Trimble Hermann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:24
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08G18/12; C08G18/0804; C08G18/0819; C08G18/0823; C08G18/28; C08G18/65; C08G18/66; C08G18/6666; C08G18/6692; C08G18/70; C08G18/71; C09; C09J; C09J175/00; C09J175/04; C09J175/08; C08G2170/00; C08G2170/80; C08L; C08L2666/00; C08L2666/02; Y; Y10; Y10S; Y10S528/00; Y10S528/905
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
61 words
IN A PROCESS FOR PREPARING A POLYURETHANE ADHESIVE COOPOSITION IN THE FORM OF AN AQUEOUS DISPERSION COMPRISING THE STEPS OF: FORMING AN ISOCYANATE-TERMINATED PREPOLYMER BY REACTING TOLYLENE DIISOCYANATE WITH A MIXTURE OF TWO GLYCOLS AT A RATIO OF FROM 1.6 TO 3.0 MOLES OF DIISOCYANATE PER MOLE OF TOTAL GLYCOL, ONE OF SAID GLYCOLS BEING A NON-POLYMERIC GLYCOL OF THE FORMULA
Claim 2
Dependent Claim
61 words
IN A PROCESS FOR PREPARING A POLYURETHANE ADHESIVE COOPOSITION IN THE FORM OF AN AQUEOUS DISPERSION COMPRISING THE STEPS OF: FORMING AN ISOCYANATE-TERMINATED PREPOLYMER BY REACTING TOLYLENE DIISOCYANATE WITH A MIXTURE OF TWO GLYCOLS AT A RATIO OF FROM 1.6 TO 3.0 MOLES OF DIISOCYANATE PER MOLE OF TOTAL GLYCOL, ONE OF SAID GLYCOLS BEING A NON-POLYMERIC GLYCOL OF THE FORMULA
Claim 3
Dependent Claim
23 words
A process according to claim 1 wherein the monisocyanate is an alkyl isocyanate having 10 to 20 carbon atoms in the alkyl chain.
Claim 4
Dependent Claim
12 words
A process according to claim 2 wherein the monoisocyanate is dodecyl isocyanate.
Claim 5
Dependent Claim
12 words
A process according to claim 1 wherein the monoisocyanate is phenyl isocyanate.
Claim 6
Dependent Claim
11 words
An adhesive composition prepared according to the process of claim 1.
Claim 7
Dependent Claim
15 words
A process according to claim 1 wherein the monisocyanate is added to the unthickened latex.
References Cited (Backward Citations)
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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) | 1978-12-01 | 1979-06-02 | 1979-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-01 | 1983-06-02 | 1983-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-01 | 1987-06-02 | 1987-12-02 | $7700.00 | Window Closed / Lapsed |