US4518740A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Moisture-hardening varnishes with an isocyanate resin base
Assignee: Huels AG
•
Filing: 1984-05-14
•
Granted: 1985-05-21
•
Expires: 2004-05-14
Abstract
Abstract Moisture-hardening varnishes which have an isocyanate resin base of adducts of a mixture of diisocyanates, wherein the diisocyanate mixture has 88 to 99% by weight of 2-methyl-1,5-diisocyanatopentane and 12 to 1% by weight of 2-ethyl-1,4-diisocyanatobutane. These varnishes exhibit excellent thermal and oxidative stability and have excellent storage stability. They also exhibit excellent compatibility with solvents, pigments and other auxiliary materials.
Inventors
- 👤 Josef Disteldorf
- 👤 Werner Flakus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:41
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/80; C08G18/8003; C08G18/8006; C08G18/8009; C08G18/8022; C08G18/8025; C08G18/28; C08G18/40; C08G18/42; C08G18/4266; C08G18/4269; C08G18/4277; C08G18/73; C08G18/77; C08G18/78; C08G18/79; C08G18/791; C08G18/792
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
32 words
Moisture-hardening varnishes which comprise adducts of a mixture of diisocyanates, wherein said diisocyanate mixture comprise about 88 to 99% by weight of 2-methyl-1,5-diisocyanato-pentane, and about 12 to 1% by weight of 2-ethyl-1,4-diisocyanatobutane.
Claim 2
Dependent Claim
32 words
Moisture-hardening varnishes which comprise adducts of a mixture of diisocyanates, wherein said diisocyanate mixture comprise about 88 to 99% by weight of 2-methyl-1,5-diisocyanato-pentane, and about 12 to 1% by weight of 2-ethyl-1,4-diisocyanatobutane.
Claim 3
Dependent Claim
17 words
The moisture-hardening varnishes as in claim 1, wherein the isocyanurate of the diisocyanate mixture is the adduct.
Claim 4
Dependent Claim
19 words
The moisture-hardening varnishes as in claim 1, wherein propanetriol prepolymers of the diisocyanate mixture are used as the adducts.
Claim 5
Dependent Claim
14 words
The moisture-hardening varnishes as in claim 1, which further comprises a TiO 2 pigment.
Claim 6
Dependent Claim
13 words
The moisture-hardening varnishes as in claim 1, which further comprises an oxyester additive.
Claim 7
Dependent Claim
14 words
The moisture-hardening varnishes as in claim 5, wherein said oxyester additive is a polycaprolactone.
Claim 8
Dependent Claim
22 words
The moisture-hardening varnishes as in claim 2, wherein said isocyanurate adduct is formed by the trimerization of said 2-methyl-1,5-diisocyanatopentane and 2-ethyl-1,4-diisocyanatobutane mixture.
Claim 9
Dependent Claim
27 words
The moisture-hardening varnishes as in claim 3, wherein the reaction of the diisocyanate mixture with propanetriol is such that the ratio of NCO:OH equivalents is about 2:1.
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) | 1988-05-20 | 1988-11-19 | 1989-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-20 | 1992-11-19 | 1993-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-20 | 1996-11-19 | 1997-05-21 | $7700.00 | Window Closed / Lapsed |