Patent US4282123A successfully refreshed from Google Patents.
US4282123A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Elastomeric urethane coating
Assignee: Valspar Corp
•
Filing: 1980-02-25
•
Granted: 1981-08-04
•
Expires: 2000-02-25
Abstract
Abstract A two-component coating system comprises (A) a polyfunctional acid (dimer acid), low base strength amine (aniline), and high base strength amine (cyclohexylamine) adduct of a diglycidyl ether of bisphenol and (B) an organic diol reacted with 2 moles of a diisocyanate. The coating is particularly adapted for coating surfaces subject to high abrasion, e.g., railroad hopper cars.
Inventors
- 👤 Joseph E. Ilaria
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:52
CPC Classifications
C; C09; C09D; C09D163/00; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08G18/28; C08G18/40; C08G18/42; C08G18/4294; C08G18/58; C08G18/581; C08G18/64; C08G18/6415; C08G18/643; C08G59/00; C08G59/18; C08G59/40; C08G59/50; C08G59/56; C08G59/58; C09D175/00; C09D175/04; Y; Y10; Y10S; Y10S524/00; Y10S524/906; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31605
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
100 words
A two-component coating composition wherein: (1) Component A comprises an adduct of a diglycidyl ether of bisphenol A, having an epoxy equivalent weight between about 170 and about 2,000, polyfunctional acid, and a mixture of aliphatic and aromatic amine, pigment, magnesium silicate talc extender, and a solvent mixture of alkoxyethyl acetate, alkyl ketone, ethyl acetate, and aromatic hydrocarbon with a solids content of 60-70 weight percent; and (2) Component B comprises a urethane prepolymer based on flexible polyhydroxy functional oligomers and toluene diisocyanate or isophorone diisocyanate; (3) said Component A and Component B being mixed at the time of application.
Claim 2
Dependent Claim
100 words
A two-component coating composition wherein: (1) Component A comprises an adduct of a diglycidyl ether of bisphenol A, having an epoxy equivalent weight between about 170 and about 2,000, polyfunctional acid, and a mixture of aliphatic and aromatic amine, pigment, magnesium silicate talc extender, and a solvent mixture of alkoxyethyl acetate, alkyl ketone, ethyl acetate, and aromatic hydrocarbon with a solids content of 60-70 weight percent; and (2) Component B comprises a urethane prepolymer based on flexible polyhydroxy functional oligomers and toluene diisocyanate or isophorone diisocyanate; (3) said Component A and Component B being mixed at the time of application.
Claim 3
Dependent Claim
28 words
The composition of claim 1, wherein said Component A and said Component B are admixed for application in a volume ratio of between about 1:3 and about 3:1.
Claim 4
Dependent Claim
43 words
The composition of claims 1 or 2, wherein, in said Component A, said diglycidyl ether has an epoxy equivalent weight between about 185 and about 210, said polyfunctional acid is dimer acid, said aliphatic amine is cyclohexylamine, and said aromatic amine is aniline.
Claim 5
Dependent Claim
31 words
The composition of claim 3, wherein said Component B is a urethane prepolymer based on hydroxy terminated polyalkylene oxides selectively reacted with one of the two isocyanate groups of toluene diisocyanate.
References Cited (Backward Citations)
US3489723A
Cited
US3629167A
Cited
US3699061A
Cited
GB1409536A
Cited
US4025579A
Cited
US4064194A
Cited
US4160065A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-08-03 | 1985-02-02 | 1985-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-03 | 1989-02-02 | 1989-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-03 | 1993-02-02 | 1993-08-04 | $7700.00 | Window Closed / Lapsed |