US4252707A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyamide-imide-acid binder with amine base
Assignee: Individual
•
Filing: 1977-01-04
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Granted: 1981-02-24
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Expires: 1997-01-04
Abstract
Abstract High temperature resistant, water-thinnable, polyimide resin containing coating compositions are disclosed which have excellent properties of flexibility, adhesion and hydrolytic stability. Also disclosed are methods of making and using the novel coating compositions of the invention.
Inventors
- 👤 John O. Ruid
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:03
CPC Classifications
C; C08; C08L; C08L79/00; C08L79/04; C08L79/08; C09; C09D; C09D179/00; C09D179/04; C09D179/08
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
76 words
An infinitely water-thinnable coating composition, which comprises; a binder which is a film forming salt of a polyamide-imide acid and a stoichiometric excess of an amine base selected from the group consisting of diethylamine, triethylamine, dipropylamine, ethylaminoethanol, N,N-dimethylethanolamine, N,N-diethylaminoethanol, diethylaminoethoxyethanol and diisopropylaminoethanol; a filler; and a water-miscible, inert, organic solvent for said salt; said salt having been formed in the presence of a proportion of a water-miscible, inert, organic solvent sufficient to solubilize said polyamide-imide acid.
Claim 2
Dependent Claim
76 words
An infinitely water-thinnable coating composition, which comprises; a binder which is a film forming salt of a polyamide-imide acid and a stoichiometric excess of an amine base selected from the group consisting of diethylamine, triethylamine, dipropylamine, ethylaminoethanol, N,N-dimethylethanolamine, N,N-diethylaminoethanol, diethylaminoethoxyethanol and diisopropylaminoethanol; a filler; and a water-miscible, inert, organic solvent for said salt; said salt having been formed in the presence of a proportion of a water-miscible, inert, organic solvent sufficient to solubilize said polyamide-imide acid.
Claim 3
Dependent Claim
53 words
A composition of claim 1 wherein said polyamide-imide acid contains imide linkages and recurring moieties of the structural formula: ##STR8## in the backbone thereof, wherein A is selected from hydrogen and a carboxy group; B is selected from oxygen and a group of the formula NH; and R represents a divalent organic radical.
Claim 4
Dependent Claim
30 words
A composition of claim 1 wherein said salt is formed by the reaction of said polyamide-imide acid and said base at a temperature of from about 150° to 200° F.
Claim 5
Dependent Claim
17 words
A composition according to claim 1 wherein said filler is an inorganic pigment having high temperature resistance.
Claim 6
Dependent Claim
12 words
A composition according to claim 1 wherein said amine base is N,N-dimethylethanolamine.
Claim 7
Dependent Claim
15 words
A composition according to claim 1 wherein said polyamide-imide acid is a polytrimellitamide resin acid.
Claim 8
Dependent Claim
21 words
A composition according to claim 1 wherein said polyamide-imide acid is the reaction product of p,p-diaminodiphenylmethane and trimellitic anhydride acid chloride.
Claim 9
Dependent Claim
19 words
A composition according to claim 1 wherein the filler/pigment-volume concentration is from about 1 percent to about 90 percent.
Claim 10
Dependent Claim
19 words
A composition according to claim 1 wherein the filler/pigment-volume concentration is from about 5 percent to about 75 percent.
Claim 11
Dependent Claim
10 words
A composition of claim 1 wherein said solvent is N-methylpyrrolidone.
References Cited (Backward Citations)
US3242136A
Cited
US3528937A
Cited
US3245932A
Cited
US3546152A
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US3582458A
Cited
US3652500A
Cited
US3766117A
Cited
US3833533A
Cited
US3804793A
Cited
US3787338A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-02-24 | 1984-08-25 | 1985-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-02-24 | 1988-08-25 | 1989-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-02-24 | 1992-08-25 | 1993-02-24 | $7700.00 | Window Closed / Lapsed |