US4555536A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Anti-corrosive coating composition
Assignee: DKS Co Ltd
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Filing: 1984-07-03
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Granted: 1985-11-26
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Expires: 2004-07-03
Abstract
Abstract An anti-corrosive polyurethane coating composition which has excellent anti-corrosive property, water resistance, adhesive property to metals and impact resistance and can be coated thick in one coating operation, comprising (1) a polyol mixture of castor oil or a polyol derived from castor oil and an amine polyol produced by addition reaction of an alkylene oxide to a nitrogen-containing compound having at least 2 active hydrogen atoms such as ammonia, an aliphatic amine or an aromatic amine, the amine polyol having at least 2 hydroxyl groups and a hydroxyl value of at least 150 mgKOH/g, (2) a polyisocyanate compound, and optionally coal tar, an aromatic hydrocarbon oil or resin, or usual paint additives.
Inventors
- 👤 Hirohisa Maki
- 👤 Takashi Sano
- 👤 Misao Yamamoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:34
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/80; C08G18/8003; C08G18/8051; C08G18/28; C08G18/40; C08G18/48; C08G18/50; C08G18/5021; C08G18/65; C08G18/66; C08G18/6666; C08G18/6696; C08K; C08K5/00; C08K5/01; C08L; C08L75/00; C08L75/04; C08L75/12; C08L95/00; C09; C09D; C09D175/00; C09D175/04; C09D175/12
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
141 words
An anti-corrosive coating composition consisting essentially of a non-foamed reaction product of: (1) a mixture of (a) a castor oil polyol and (b) an amine polyol produced by addition reaction of an alkylene oxide of the formula: ##STR2## wherein R 1 and R 2 are hydrogen, alkyl or aryl, provided that at least one of R 1 and R 2 is hydrogen, to a nitrogen-containing compound having at least 2 active hydrogen atoms, said amine polyol having at least 2 hydroxyl groups and a hydroxyl value of at least 150 mgKOH/g, the amount of said amine polyol being 5 to 70% by equivalent based on the total polyol; and (2) a polyisocyanate compound, the amount of said polyisocyanate compound being such that the ratio of isocyanato group to the active hydrogen of the polyol is from 0.85 to 1.15:1 by equivalent.
Claim 2
Dependent Claim
141 words
An anti-corrosive coating composition consisting essentially of a non-foamed reaction product of: (1) a mixture of (a) a castor oil polyol and (b) an amine polyol produced by addition reaction of an alkylene oxide of the formula: ##STR2## wherein R 1 and R 2 are hydrogen, alkyl or aryl, provided that at least one of R 1 and R 2 is hydrogen, to a nitrogen-containing compound having at least 2 active hydrogen atoms, said amine polyol having at least 2 hydroxyl groups and a hydroxyl value of at least 150 mgKOH/g, the amount of said amine polyol being 5 to 70% by equivalent based on the total polyol; and (2) a polyisocyanate compound, the amount of said polyisocyanate compound being such that the ratio of isocyanato group to the active hydrogen of the polyol is from 0.85 to 1.15:1 by equivalent.
Claim 3
Dependent Claim
20 words
The composition of claim 1, wherein the weighted average hydroxyl value of said polyol mixture is at least 180 mgKOH/g.
Claim 4
Dependent Claim
11 words
The composition of claim 1, which further contains a coal tar.
Claim 5
Dependent Claim
27 words
The composition of claim 1, which further contains at least one member selected from the group consisting of an aromatic hydrocarbon oil and an aromatic hydrocarbon resin.
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) | 1988-11-25 | 1989-05-27 | 1989-11-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-25 | 1993-05-27 | 1993-11-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-25 | 1997-05-27 | 1997-11-26 | $7700.00 | Window Closed / Lapsed |