US4383076A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single component enamels based on blocked polyisocyanurate polyisocyanates
Assignee: Huels AG
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Filing: 1980-09-15
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Granted: 1983-05-10
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Expires: 2000-09-15
Abstract
Abstract A single component enamel composition comprising a polyester component containing more than one hydroxy group in the molecule and a hardener component, said hardener comprising at least one diisocyanate capped with epsilon -caprolactam and/or at least one polyisocyanate containing isocyanaturate groups capped with epsilon -caprolactam.
Inventors
- 👤 Elmar Wolf
- 👤 Rainer Gras
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:16
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/80; C08G18/8061; C08G18/807; C08G18/8074; C08G18/77; C08G18/78; C08G18/79; C08G18/791; C08G18/792
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
136 words
A single component enamel composition, comprising: from 40% to 80% by wt of a resin in at least one solvent, said resin comprising a polyester component containing more than one hydroxy group in the molecule and having a second order transition temperature ranging between +25° C. and -25° C. and a hardener component of the formula: ##STR4## wherein x ranges from 0 to 4 with the proviso that at a minimum, the hardener must comprise a material having a value for x of one, and wherein R is --(CH 2 ) n -- with 3≦n≦12, or is ##STR5## said hardener prepared by adding a mixture of propylene oxide and 1,4-diazabicyclooctane (2,2,2) as a catalyst to a cycloaliphatic diisocyanate, trimerizing said diisocyanate to the desired degree, deactivating the catalyst and then capping said trimerized isocyanurate with ε-caprolactam.
Claim 2
Dependent Claim
136 words
A single component enamel composition, comprising: from 40% to 80% by wt of a resin in at least one solvent, said resin comprising a polyester component containing more than one hydroxy group in the molecule and having a second order transition temperature ranging between +25° C. and -25° C. and a hardener component of the formula: ##STR4## wherein x ranges from 0 to 4 with the proviso that at a minimum, the hardener must comprise a material having a value for x of one, and wherein R is --(CH 2 ) n -- with 3≦n≦12, or is ##STR5## said hardener prepared by adding a mixture of propylene oxide and 1,4-diazabicyclooctane (2,2,2) as a catalyst to a cycloaliphatic diisocyanate, trimerizing said diisocyanate to the desired degree, deactivating the catalyst and then capping said trimerized isocyanurate with ε-caprolactam.
Claim 3
Dependent Claim
48 words
The composition of claim 1, wherein said hardener comprises 99 to zero parts by weight of said capped diisocyanate which has a value of x equal to zero and 1 to 100 parts by weight of said capped polyisocyanate containing isocyanurate moieties whose values for x are 1≦x≦4.
Claim 4
Dependent Claim
48 words
The composition of claim 2, wherein said hardener comprises from 70 to 30 parts by weight of the hardener having a value for x of zero and 30 to 70 parts by weight of at least one hardener having values for x of 1, 2, 3 or 4.
Claim 5
Dependent Claim
36 words
The composition of claim 2 or 3, wherein said hardener is produced by thorough mixing, optionally in a solution, of the separately prepared hardeners having values for x of zero and 1, 2, 3 or 4.
Claim 6
Dependent Claim
42 words
The composition of claim 2 or 3, wherein the hardener is a mixture prepared by adding a trimerization catalyst to a (cyclo-) aliphatic diisocyanate, trimerizing said diisocyanate to the desired degree, deactivating the catalyst and then capping said trimerized isocyanate with ε-caprolactam.
Claim 7
Dependent Claim
44 words
The composition of claim 1, 2 or 3, containing isocyanurate groups capped with ε-caprolactam, wherein the isocyanate group containing components of said hardener are capped with ε-caprolactam in such a manner that 0.1 to 10% by weight of the isocyanate functional groups remain uncapped.
Claim 8
Dependent Claim
45 words
The composition of claim 1, 2 or 3, containing isocyanurate groups capped with ε-caprolactam, wherein said solvent has a boiling point between 80° C. and 250° C. and is selected from the group consisting of an aromatic hydrocarbon, a ketone, an ester and mixtures thereof.
Claim 9
Dependent Claim
38 words
The composition of claim 7, wherein said aromatic hydrocarbon is toluene, mixed xylenes, tetralin or pseudocumene; said ketone is methylisobutyl ketone, diisobutyl ketone or isophorone and said ester is acetic acid-n-hexylester, ethyleneglycol acetate, ethyl acetate or n-butyl acetate.
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) | 1986-05-09 | 1986-11-08 | 1987-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-09 | 1990-11-08 | 1991-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-09 | 1994-11-08 | 1995-05-10 | $7700.00 | Window Closed / Lapsed |