US4259221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-soluble polyamideimides
Assignee: Von Roll Isola USA Inc
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Filing: 1978-07-31
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Granted: 1981-03-31
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Expires: 1998-07-31
Abstract
Abstract Polyamideimide base coating compositions having water as a solvent constituent are provided. Amine containing material is added to the polyamideimide along with water or water and a relatively small amount of compatible organic solvent to provide a composition having good coating qualities and salutary electrical insulating and physical characteristics.
Inventors
- 👤 Denis R. Pauze
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 11:25
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/303; H01B3/306; C; C09; C09D; C09D179/00; C09D179/04; C09D179/08; H01B3/308
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
69 words
The process of preparing a soluble cleaved polyamideimide containing coating composition which comprises reacting said polyamideimide with a tertiary amine to cleave at least part of the imide rings in a solvent containing water as a major constituent, said reacting being continued until a clear solution is obtained, wherein the quantity of said tertiary amine is more than sufficient to neutralize any free carboxyl groups present in said polyamideimide.
Claim 2
Dependent Claim
69 words
The process of preparing a soluble cleaved polyamideimide containing coating composition which comprises reacting said polyamideimide with a tertiary amine to cleave at least part of the imide rings in a solvent containing water as a major constituent, said reacting being continued until a clear solution is obtained, wherein the quantity of said tertiary amine is more than sufficient to neutralize any free carboxyl groups present in said polyamideimide.
Claim 3
Dependent Claim
14 words
An aqueous polyamideimide coating composition prepared by means of the proces of claim 1.
Claim 4
Dependent Claim
17 words
A coating composition as in claim 2 wherein water and said tertiary amine is the sole solvent.
Claim 5
Dependent Claim
18 words
A coating composition as in claim 2 in which said cleaved polyamideimide contains essentially no free carboxyl groups.
Claim 6
Dependent Claim
17 words
A coating composition as in claim 2 wherein said polyamideimide before being cleaved contains free carboxyl groups.
Claim 7
Dependent Claim
13 words
A coating composition as in claim 2 wherein said tertiary amine is dimethylethanolamine.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-03-30 | 1984-09-29 | 1985-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-30 | 1988-09-29 | 1989-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-30 | 1992-09-29 | 1993-03-31 | $7700.00 | Window Closed / Lapsed |