US4408034A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for curing urethane resins
Assignee: Takeda Pharmaceutical Co Ltd
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Filing: 1982-02-09
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Granted: 1983-10-04
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Expires: 2002-02-09
Abstract
Abstract A method for curing an isocyanate group-containing compound, which comprises treating with a tertiary amine in a vapor-phase state an isocyanate compound having in one molecule not less than two isocyanate groups linked to an aromatic nucleus through a methylene group or an isocyanate-terminated urethane resin obtained by the reaction thereof with an active-hydrogen containing compound. The isocyanate compounds or isocyanate-terminated urethane resins are allowed to cure and dry for a shortened period of time ranging from about 1 to 10 minutes. The method of this invention can be advantageously employed in field, such as continuous painting and printing.
Inventors
- 👤 Seiji Kazama
- 👤 Michio Tanaka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:27
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/80; C08G18/8003; C08G18/8006; C08G18/8009; C08G18/8022; C08G18/8029; C08G18/08; C08G18/10; C08G18/16; C08G18/18; C08G18/1825; C08G18/1891; C08G18/74; C08G18/76; C08G18/7614; C08G18/7628; C08G18/7642
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
56 words
A method for curing an isocyanate group-containing compound, which comprises treating, with a tertiary amine in a vapor-phase state, an isocyanate compound having in one molecule not less than two isocyanate groups linked to an aromatic nucleus through a methylene group, or an isocyanate-terminated urethane resin obtained by the reaction thereof with an active-hydrogen containing compound.
Claim 2
Independent Claim
56 words
A method for curing an isocyanate group-containing compound, which comprises treating, with a tertiary amine in a vapor-phase state, an isocyanate compound having in one molecule not less than two isocyanate groups linked to an aromatic nucleus through a methylene group, or an isocyanate-terminated urethane resin obtained by the reaction thereof with an active-hydrogen containing compound.
Claim 3
Dependent Claim
18 words
A method as claimed in claim 1, wherein the isocyanate-terminated urethane resin is a moisture-curing type urethane resin.
Claim 4
Dependent Claim
18 words
A method as claimed in claim 1, wherein the isocyanate-terminated urethane resin is a two-can type urethane resin.
Claim 5
Dependent Claim
36 words
A method as claimed in claim 3, wherein the two-can type urethane resin is one which comprises a polyester polyol or acrylic polyol and a polyisocyanate obtained by the reaction of 1,3-bis(isocyanatomethyl)benzene or 1,4-bis(isocyanatomethyl)benzene with trimethylolpropane.
Claim 6
Dependent Claim
27 words
A method as claimed in claim 1, wherein the concentration of the tertiary amine in the vapor-phase is in the range of about 10 to 100,000 ppm.
Claim 7
Dependent Claim
19 words
A method as claimed in claim 1, wherein the tertiary amine is an alkanolamine having a tertiary nitrogen atom.
Claim 8
Dependent Claim
17 words
A method as claimed in claim 6, wherein the alkanolamine having a tertiary nitrogen atom is dimethylethanolamine.
References Cited (Backward Citations)
US3874898A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-10-03 | 1987-04-04 | 1987-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-03 | 1991-04-04 | 1991-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-03 | 1995-04-04 | 1995-10-04 | $7700.00 | Window Closed / Lapsed |