US3668175A
Expired / Lapsed
US
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Cresylic acid blends of polymeric amide-imide-ester wire enamels
Assignee: Westinghouse Electric Corp
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Filing: 1970-08-05
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Granted: 1972-06-06
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Expires: 1990-08-05
Abstract
Abstract Polymeric amide-imide-ester wire enameling compositions are prepared from (1) a monoanhydride of an aromatic tricarboxylic acid, e.g. trimellitic anhydride, (2) an aromatic primary diamine compound and (3) either polyfunctional acids and polyhydroxy compounds or the polyesters thereof. AT least a portion of the polyol or polyhydroxy compound is a tris (hydroxyalkyl) isocyanurate, e.g. tris (hydroxyethyl) isocyanurate. The polyfunctional acids (3) comprise an acid component selected from the group consisting of trimellitic anhydride, isophthalic acid and esters of isophthalic and terephthalic acid. The polymeric amide-imide-ester may be blended with terephthalate or isophthalate polyesters, polyisocyanates and other materials. One particularly suitable polyisocyanate is prepared from dimethylterephthalate, tris (2-hydroxyethyl) isocyanurate and tolylene diisocyanate. Small amounts of aliphatic amino compounds, aliphatic polyols and other flexibilizing materials may be incorporated into either the polymeric amide-imide-ester or the polyester blended therewith. A variety of block and modified block polymers may be made. Imidization occurs during the preparation of the polymeric amide-imide-ester so that the condensed water is removed before the fluid compositions are applied and cured.
Inventors
- 👤 Frank A Sattler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:37
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/16; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/42; C08G18/46; C08G18/4615; C08G18/4638; C08G18/4661; C08G18/64; C08G18/6415; C08G18/6438; H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/303; H01B3/306; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12556; Y10T428/12569; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/294; Y10T428/2942; Y10T428/2947; Y10T428/31504; Y10T428/31551; Y10T428/31554; Y10T428/31605; Y10T428/31678; Y10T428/31681
Claims Analysis
Total Claims: 29
Claim 1
Independent Claim
120 words
a polyol component at least a portion of which is a tris (hydroxyalkyl) isocyanurate, and II. a solvent system comprising cresylic acid, where said trimellitic anhydride is at least 13 equivalent percent of (I), said aromatic primary diamino compound is at least 8 equivalent percent of (I), said tris (hydroxyalkyl) isocyanurate is at least 15 equivalent percent of (I), said aromatic dicarboxylic acid is up to 31 equivalent percent of (I), said trimellitic anhydride and said aromatic dicarboxylic acid comprise an acidic component which is 40 to 55 equivalent percent of (I), and said aromatic primary diamino compound, said (A) (3) polyol, and said (B) (2) polyol comprise an amino-polyol component which is 45 to 60 equivalent percent of (I).
Claim 2
Dependent Claim
13 words
The composition of claim 1 wherein said solvent system contains an aromatic hydrocarbon.
Claim 3
Dependent Claim
6 words
an aromatic primary diamino compound, and
Claim 4
Dependent Claim
5 words
an aromatic primary diamino compound
Claim 5
Dependent Claim
4 words
tris (2-hydroxyethyl) isocyanurate and
Claim 6
Dependent Claim
4 words
tris (2-hydroxyethyl) isocyanurate and
Claim 7
Dependent Claim
24 words
a diisocyanate compound and E. a minor proportion of a phenolic resin and (II) a solvent system containing cresylic acid and an aromatic hydrocarbon.
Claim 8
Dependent Claim
19 words
an aliphatic diol, C. a minor proportion of a titanate ester, D. a minor proportion of an ester-urethane-isocyanate of
Claim 9
Dependent Claim
3 words
tris (2-hydroxyethyl) isocyanurate
Claim 10
Dependent Claim
38 words
a polyol where the molar proportion of (1):(2) for the amide-imide linkages is in the range of about 0.8:1 to 1.8:1, and B. 20-60 percent by weight of total solids of the esterification product of an admixture comprising
Claim 11
Dependent Claim
22 words
The composition of claim 1 wherein at least a portion of the polyol component of (I) (A) is a tris (hydroxyalkyl) isocyanurate.
Claim 12
Dependent Claim
17 words
The composition of claim 3 wherein the polyol component of the amide-imide-ester (A) contains an aliphatic diol.
Claim 13
Dependent Claim
37 words
an aliphatic diol, wherein the molar proportion of (1):(2) for the amide-imide linkages is in the range of about 0.8:1 to 1.8:1, B. 20 to 60 weight percent, based on total solids, of a polymeric ester of
Claim 14
Dependent Claim
36 words
The composition of claim 3 wherein the aromatic dicarboxylic acid of (B) is dimethylterephthalate, the polyol component of (B) contains an aliphatic diol and the tris (hydroxylalkyl) isocyanurate of (A) and (B) is tris (2-hydroxyethyl) isocyanurate.
Claim 15
Dependent Claim
22 words
The composition of claim 5 wherein the aromatic primary diamino compound is selected from the group consisting of m-phenylenediamine and methylene dianiline.
Claim 16
Dependent Claim
16 words
The composition of claim 1 wherein said blend contains a minor proportion of a titanate ester.
Claim 17
Dependent Claim
23 words
The composition of claim 7 wherein said titanate ester is selected from the group consisting of tetra alkyl titanates and tetra cresyl titanate.
Claim 18
Dependent Claim
20 words
The composition of claim 8 containing from 1 to 6 percent by weight of total solids of said titanate ester.
Claim 19
Dependent Claim
24 words
The composition of claim 9 wherein the blend contains from about 1 to 10 percent by weight of total solids of a phenolic resin.
Claim 20
Dependent Claim
16 words
The composition of claim 10 wherein the blend contains a minor proportion of a blocked polyisocyanate.
Claim 21
Dependent Claim
21 words
The composition of claim 11 containing from about 10 to 20 percent by weight of total solids of the blocked polyisocyanate.
Claim 22
Dependent Claim
17 words
The composition of claim 12 wherein said blocked polyisocyanate is the phenol blocked trimer of tolylene diisocyanate.
Claim 23
Dependent Claim
29 words
The soluble coating composition of claim 11 wherein said polyisocyanate is an ester-urethane-isocyanate of (A) an aromatic dicarboxylic acid, (B) a tris (hydroxyalkyl) isocyanurate and (C) a diisocyanate compound.
Claim 24
Dependent Claim
21 words
The soluble coating composition of claim 14 wherein (A) is dimethylterephthalate, (B) is tris (2-hydroxyethyl) isocyanurate and (C) is tolylene diisocyanate.
Claim 25
Dependent Claim
18 words
The soluble coating composition of claim 15 wherein the diester of (A) and (B) is reacted with (C).
Claim 26
Dependent Claim
18 words
The soluble coating composition of claim 16 wherein said reaction is conducted in an excess of cresylic acid.
Claim 27
Dependent Claim
15 words
The soluble coating composition of claim 17 wherein the molar proportion of (A):(B):(C) is 1:2:4.
Claim 28
Dependent Claim
22 words
A resinous composition suitable for the insulation of electrical conductors consisting essentially of (I) a blend of A. a polymeric amide-imide-ester of
Claim 29
Dependent Claim
22 words
The composition of claim 1 wherein said polymeric amide-imide-ester also includes up to about 5 equivalent percent of a tetracarboxylic aromatic dianhydride.
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) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |