US3666725A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tris(isocyanatotolyl) isocyanurate-tolylene diisocyanate complexes
Assignee: EIDP Inc
•
Filing: 1970-10-26
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Granted: 1972-05-30
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Expires: 1990-10-26
Abstract
Abstract An aromatic polyisocyanate which is a molecular complex consisting of one molecule of tris(isocyanatotolyl) isocyanurate associated with two molecules of tolylene diisocyanate. The complex, which is a free-flowing crystalline powder low in toxicity, reacts with active-hydrogen containing compounds to form polyurethane coatings, foams, elastomers, etc. Such polyurethane coatings have particularly outstanding resistance to weather exposure and solvent attack.
Inventors
- 👤 Carl Francis Irwin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:15
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/77; C08G18/78; C08G18/79; C08G18/791; C08G18/794; C08G18/28; C08G18/65; C08G18/66; C08G18/6603; Y; Y10; Y10S; Y10S528/00; Y10S528/903
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
24 words
A composition of claim 1 wherein the Y molecules are 2,4-tolylene diisocyanate and the X1, X2 and X3 radicals are derived from 2,4-tolylene diisocyanate.
Claim 2
Dependent Claim
24 words
A composition of claim 1 wherein the Y molecules are 2,6-tolylene diisocyanate and the X1, X2 and X3 radicals are derived from 2,6-tolylene diisocyanate.
Claim 3
Dependent Claim
18 words
A composition of claim 1 wherein the complex is formed from a mixture of 2,4- and 2,6-tolylene diisocyanates.
Claim 4
Dependent Claim
21 words
A polyurethane prepared by reacting the composition of claim 1 with at least one compound containing at least two Zerewitinoff hydrogens.
Claim 5
Dependent Claim
21 words
A polyurethane prepared by reacting the composition of claim 2 with at least one compound containing at least two Zerewitinoff hydrogens.
Claim 6
Dependent Claim
21 words
A polyurethane prepared by reacting the composition of claim 3 with at least one compound containing at least two Zerewitinoff hydrogens.
Claim 7
Dependent Claim
21 words
A polyurethane prepared by reacting the composition of claim 4 with at least one compound containing at least two Zerewitinoff hydrogens.
Claim 8
Dependent Claim
67 words
A coating composition according to claim 5 wherein the polyurethane is prepared by mixing about 1.6-2.0 equivalents of the polyisocyanate complex with about 1 equivalent of a polyether or polyester glycol having a molecular weight of about 200-1000 or with about 1 equivalent of a polyether or polyester glycol in admixture with a low molecular weight diol, said mixture having an average molecular weight of about 200-1000.
Claim 9
Dependent Claim
68 words
A coating composition according to claim 8 wherein the polyurethane is prepared by mixing about 1.6-2.0 equivalents of the polyisocyanate complex with about 1 equivalent of a polyether or polyester glycol having an average molecular weight of about 200-1,000 or with about 1 equivalent of a polyether or polyester glycol in admixture with a low molecular weight diol, said mixture having an average molecular weight of about 200-1,000.
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) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |