US4602071A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the production of oligourethanes containing mercapto groups and their use as binders for coating and sealing compositions hardenable by oxidation and as additives for epoxide resins
Assignee: Bayer AG
•
Filing: 1982-05-19
•
Granted: 1986-07-22
•
Expires: 2002-05-19
Abstract
Abstract The invention relates to a process for the production of oligourethanes containing terminal mercapto groups by reacting 1-isocyanatomethyl-1,3,3-trimethyl-5-isocyanatocyclohexane with substoichiometric quantities of relatively high molecular weight polyether polyols and mercapto ethanol and to the use of the oligourethanes obtainable in this way as binders for coating and sealing compositions hardenable by oxidation and as additives for epoxide resins.
Inventors
- 👤 Wolfgang Wellner
- 👤 Josef Pedain
- 👤 Hermann Gruber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:25
CPC Classifications
C; C09; C09K; C09K3/00; C09K3/10; C09K3/1006; C09K3/1021; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08G18/28; C08G18/30; C08G18/38; C08G18/3855; C08G18/3876; C08G18/70; C08G18/72; C08G18/74; C08G18/75; C08G18/751; C08G18/752; C08G18/753; C08G18/755; C08G75/00; C08G75/14; C08L; C08L63/00; C09K2200/00; C09K2200/06; C09K2200/0645; C09K2200/0647
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
82 words
A process for the production of oligourethanes containing terminal mercapto groups which comprises reacting (a) 1-isocyanatomethyl-1,3,3-trimethyl -5-isocyanatocyclohexane with (b) substoichiometric quantities of a polyether polyol having a theoretical molecular weight of about 4000 to 7000 and an average OH-functionality of greater than about 2.5 and (c) about 0.8 to 1.1 times the equivalent quantity of mercapto ethanol, based on the excess of isocyanate groups arising out of the molar ratio of components (a) to (b) and the hydroxyl groups of component (c).
Claim 2
Dependent Claim
82 words
A process for the production of oligourethanes containing terminal mercapto groups which comprises reacting (a) 1-isocyanatomethyl-1,3,3-trimethyl -5-isocyanatocyclohexane with (b) substoichiometric quantities of a polyether polyol having a theoretical molecular weight of about 4000 to 7000 and an average OH-functionality of greater than about 2.5 and (c) about 0.8 to 1.1 times the equivalent quantity of mercapto ethanol, based on the excess of isocyanate groups arising out of the molar ratio of components (a) to (b) and the hydroxyl groups of component (c).
Claim 3
Dependent Claim
33 words
The process of claim 1, wherein an NCO-prepolymer is initially prepared from components (a) and (b) at an NCO/OH-equivalent ratio of from about 1.8:1 to 3:1 and is then reacted with component (c).
Claim 4
Dependent Claim
7 words
The product of claim 1 or 2.
Claim 5
Dependent Claim
19 words
A coating or sealing composition which is hardenable by oxidation and contains as binder the product of claim 3.
Claim 6
Dependent Claim
13 words
A composition comprising (a) epoxide resins and (b) the product of claim 3.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-07-21 | 1990-01-20 | 1990-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-21 | 1994-01-20 | 1994-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-21 | 1998-01-20 | 1998-07-22 | $7700.00 | Window Closed / Lapsed |