US4631206A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for curing polyurethane coating
Assignee: Toyoda Gosei Co Ltd
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Filing: 1985-07-25
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Granted: 1986-12-23
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Expires: 2005-07-25
Abstract
Abstract An uncured polyurethane coating formed by applying polyurethane paint containing isocyanate prepolymer on a substrate is cured by a method which comprises applying a catalyst (cure accelerator) on the uncured polyurethane coating and subsequently exposing the polyurethane coating to a heating atmosphere of 60° to 100° C. By this method, the reaction of urethanation explosively proceeds and the time for curing the coating can be notably cut because the optimum catalyst for the polyurethane coating can be selected without restriction and the catalyst in a highly concentrated state can be brought into contact with the polyurethane coating.
Inventors
- 👤 Akira Mabuchi
- 👤 Kenji Yano
- 👤 Hisashi Mizuno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 02:43
CPC Classifications
C; C08; C08J; C08J3/00; C08J3/24; B; B05; B05D; B05D3/00; B05D3/10; B05D3/107; B05D3/108; B05D7/00; B05D7/02; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08G18/16; C09; C09D; C09D175/00; C09D175/04; C08J2375/00; C08J2375/04; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/2419; Y10T428/24198; Y10T428/31504; Y10T428/31551; Y10T428/31573; Y10T428/3158; Y10T428/31587
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
62 words
A method for curing a polyurethane coating, comprising the steps of: (1) applying a polyurethane paint containing isocyanate prepolymer at a stated position on the surface of a substrate, (2) applying a catalyst (cure accelerator) on the uncured polyurethane coating formed in the preceding step (1), and (3) subsequently curing said polyurethane coating in a heating atmosphere of 60° to 100° C.
Claim 2
Independent Claim
62 words
A method for curing a polyurethane coating, comprising the steps of: (1) applying a polyurethane paint containing isocyanate prepolymer at a stated position on the surface of a substrate, (2) applying a catalyst (cure accelerator) on the uncured polyurethane coating formed in the preceding step (1), and (3) subsequently curing said polyurethane coating in a heating atmosphere of 60° to 100° C.
Claim 3
Dependent Claim
20 words
A method according to claim 1, wherein said substrate is a thermoplastic elastomer of polyvinyl chloride type or polyolefin type.
Claim 4
Dependent Claim
41 words
A method for according to claim 2, wherein said catalyst is at least one member selected from the group consisting of triethylene diamine, dibutyl tin dilaurate, mixture of triethylene diamine and dibutyl tin dilaurate, phenol salt of 1,8-diaza-bicyclo-(5,4,0)-undecene-7, and dimethylethanol amine.
Claim 5
Dependent Claim
88 words
A method according to claim 1, wherein said polyurethane paint is a polyol curing type coating composition selected from the group consisting of (1) Hydroxyl prepolymer obtained by the reaction of polyester polyol with organic diisocyanate: 100 parts by weight (2) Castor oil polyol: 0 to 60 parts by weight (3) Isocyanate prepolymer obtained by the reaction of low molecular polyol with organic diisocyanate: 1 to 100 parts by weight (4) Fluorine resin: 2 to 100 parts by weight (5) Silicone oil: 2 to 100 parts by weight.
Claim 6
Dependent Claim
35 words
A method according to claim 1, wherein for the purpose of said application, said catalyst is diluted to 0.5 to 10 wt% with the same solvent as used in the dilution of said polyurethane paint.
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) | 1989-12-22 | 1990-06-23 | 1990-12-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-12-22 | 1994-06-23 | 1994-12-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-12-22 | 1998-06-23 | 1998-12-23 | $7700.00 | Window Closed / Lapsed |