Patent DE377766C successfully refreshed from Google Patents.
Patent US4208464A successfully refreshed from Google Patents.
US4208464A
Expired / Lapsed
US
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Article coated with baked layer of water-soluble heat-resistant insulating varnish
Assignee: Nitto Denko Corp
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Filing: 1978-05-02
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Granted: 1980-06-17
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Expires: 1998-05-02
Abstract
Abstract A coated article comprising a metal support and a baked layer of a water soluble heat-resistant insulating varnish containing a resin comprising ester groups and imide rings in the molecule dissolved in water using a volatilizable basic compound, the resin comprising the reaction product of (A) a carboxyl-containing polyesterimide resin having an acid value of about 30 to 150 obtained by reacting (a) a polyhydric alcohol component comprising at least one organic polyhydric alcohol and containing about 10 to 60 mol % of an imide ring-containing glycol of the general formula (I): ##STR1## wherein R 1 is a trivalent aromatic group, R 2 is a divalent organic group, and n is an integer of 1 to 3, with (b) a polycarboxylic acid component comprising at least one trivalent or divalent organic carboxylic acid or the anhydride thereof, where about 30 to 100 mol % of which comprises an aromatic tricarboxylic acid or the anhydride thereof so that the equivalent ratio (OH/COOH) between the polyhydric alcohol component and the polycarboxylic acid component is about 1.0 to 2.0; (B) 1,2,3,4-butanetetracarboxylic acid or an imide-forming derivative thereof; and (C) an organic diamine.
Inventors
- 👤 Takashi Ishizuka
- 👤 Naoki Miwa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:39
CPC Classifications
H; H01; H01B; H01B7/00; H01B7/17; H01B7/29; H01B7/292; C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/16; C09; C09D; C09D179/00; C09D179/04; C09D179/08; H01B3/00; H01B3/18; H01B3/30; H01B3/303; H01B3/306; H01B3/308; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2936; Y10T428/294; Y10T428/2942; Y10T428/2947; Y10T428/2949; Y10T428/2958; Y10T428/31504; Y10T428/31678; Y10T428/31681; Y10T428/31692; Y10T428/31699
Claims Analysis
Total Claims: 39
Claim 1
Independent Claim
186 words
A coated article comprising a metal support and a baked layer of a water-soluble heat-resistant insulating varnish containing a resin comprising ester groups and imide rings in the molecule dissolved in water using a volatilizable basic compound, said resin comprising the reaction product of (A) a carboxyl-containing polyesterimide resin having an acid value of about 30 to 150 obtained by reacting (a) a polyhydric alcohol component comprising at least one organic polyhydric alcohol and containing about 10 to 60 mol % of an imide ring-containing glycol of the general formula(I): ##STR32## wherein R 1 is a trivalent aromatic group, R 2 is a divalent organic group, and n is an integer of 1 to 3, with (b) a polycarboxylic acid component comprising at least one trivalent or divalent organic carboxylic acid or the anhydride thereof, about 30 to 100 mol % of which comprises an aromatic tricarboxylic acid or the anhydride thereof so that the equivalent ratio (OH/COOH) between the polyhydric alcohol component and the polycarboxylic acid component is about 1.0 to 2.0; (B) 1,2,3,4-butanetetracarboxylic acid or an imide-forming derivative thereof, and (C) an organic diamine.
Claim 2
Dependent Claim
186 words
A coated article comprising a metal support and a baked layer of a water-soluble heat-resistant insulating varnish containing a resin comprising ester groups and imide rings in the molecule dissolved in water using a volatilizable basic compound, said resin comprising the reaction product of (A) a carboxyl-containing polyesterimide resin having an acid value of about 30 to 150 obtained by reacting (a) a polyhydric alcohol component comprising at least one organic polyhydric alcohol and containing about 10 to 60 mol % of an imide ring-containing glycol of the general formula(I): ##STR32## wherein R 1 is a trivalent aromatic group, R 2 is a divalent organic group, and n is an integer of 1 to 3, with (b) a polycarboxylic acid component comprising at least one trivalent or divalent organic carboxylic acid or the anhydride thereof, about 30 to 100 mol % of which comprises an aromatic tricarboxylic acid or the anhydride thereof so that the equivalent ratio (OH/COOH) between the polyhydric alcohol component and the polycarboxylic acid component is about 1.0 to 2.0; (B) 1,2,3,4-butanetetracarboxylic acid or an imide-forming derivative thereof, and (C) an organic diamine.
Claim 3
Dependent Claim
20 words
The coated article of claim 1, wherein said varnish further contains a water-soluble organic metal compound as a curing agent.
Claim 4
Dependent Claim
21 words
The coated articles of claim 2, wherein said organic metal compound is titanium ammonium lactate, titanium lactate or zirconium ammonium lactate.
Claim 5
Dependent Claim
39 words
The coated articles of claim 3, wherein the amount of said organic metal compound is up to about 10 parts by weight per 100 parts by weight of said resin comprising the reaction product of (A), (B) and (C).
Claim 6
Dependent Claim
38 words
The coated articles of claim 1, wherein up to about 30 mol % of said aromatic tricarboxylic acid or the anhydride thereof of said polycarboxylic acid component is replaced by an aromatic tetracarboxylic acid or the anhydride thereof.
Claim 7
Dependent Claim
43 words
The coated articles of claim 1, wherein the total amount of said 1,2,3,4-butanetetracarboxylic acid or the imide-forming derivative thereof (B) and said organic diamine (C) is about 20 to 200 parts by weight per 100 parts by weight of said polyesterimide resin (A).
Claim 8
Dependent Claim
27 words
The coated articles of claim 6, wherein said total amount is 30 to 150 parts by weight per 100 parts by weight of said polyesterimide resin (A).
Claim 9
Dependent Claim
30 words
The coated articles of claim 1, wherein the equivalent ratio of said 1,2,3,4-butanetetracarboxylic acid or the imide-forming derivative thereof (B) to said organic diamine (C) is about 0.5 to 2.
Claim 10
Dependent Claim
14 words
The coated articles of claim 8, wherein said equivalent ratio is 0.8 to 1.3.
Claim 11
Dependent Claim
28 words
The coated articles of claim 1, wherein said volatilizable basic compound is selected from the group consisting of ammonia, aqueous ammonia, trialkylamines, N-alkyldiethanolamines, N,N-dialkylethanolamines, monoethanolamine, diethanolamine and triethanolamine.
Claim 12
Dependent Claim
23 words
The coated articles of claim 1, wherein up to about 30% by weight of said water is replaced by a water-soluble high-boiling solvent.
Claim 13
Dependent Claim
50 words
The coated article of claim 1, wherein said imide ring-containing glycol of formula (I) is prepared by reacting about 2 mols of an aromatic tricarboxylic acid anhydride with 1 mol of an organic diamine in a glycol selected from the group consisting of ethylene glycol, diethylene glycol and triethylene glycol.
Claim 14
Dependent Claim
67 words
The coated articles of claim 1, wherein said polyhydric alcohol is ethylene glycol, propylene glycol, 1,4-butanediol, 1,5-pentanediol, 1,6-hexanediol, 1,7-heptanediol, 1,8-octanediol, 1,9-nonanediol, 1,10-decanediol, diethylene glycol, dipropylene glycol, triethylene glycol, 4,4'-dihydroxymethyldiphenyl, 4,4'-dihydroxyethyldiphenyl, 4,4'-dihydroxymethyldiphenylmethane, 4,4'-dihydroxyethyldiphenylmethane, 4,4'-dihydroxymethyldiphenyl ether, 4,4'-dihydroxyethyldiphenyl ester, 4,4'-dihydroxymethyldiphenyl sulfide, 4,4'-dihydroxyethyldiphenyl sulfide, 4,4'-dihydroxymethyldiphenyl sulfone, 4,4'-dihydroxyethyldiphenyl sulfone, 4,4'-dihydroxymethyldiphenyl ketone, 4,4'-dihydroxyethyldiphenyl ketone, 4,4'-dihydroxymethyldiphenylpropane, 4,4'-dihydroxyethyldiphenylpropane, bis-(2-hydroxyethyl)terephthalate, bis-(2-hydroxyethyl)isophthalate, bis-(2-hydroxyethyl)phthalate, glycerol, trimethylol propane, 1,2,6-hexanetriol, 3-methyl-1,3,5-hexanetriol, tris-(2-hydroxyethyl)isocyanurate, pentaerythritol, or mixtures of these organic polyhydric alcohols.
Claim 15
Dependent Claim
50 words
The coated articles of claim 1, wherein said aromatic tricarboxylic acid or the anhydride thereof is represented by formula (IV) or (V), respectively ##STR33## wherein R 1 is a trivalent aromatic group selected from the group consisting of ##STR34## wherein R 3 is selected from the groups consisting of ##STR35##
Claim 16
Dependent Claim
92 words
The coated article of claim 1, wherein said aromatic tricarboxylic acid or the anhydride thereof is trimellitic acid or the anhydride thereof, trimesic acid or the anhydride thereof, 3,4,3'- or 3,4,4'-diphenyltricarboxylic acid or the anhydride thereof, 3,4,3'- or 3,4,4'-diphenylmethanetricarboxylic acid or the anhydride thereof, 3,4,3'- or 3,4,4'-diphenylether tricarboxylic acid or the anhydride thereof, 3,4,3'- or 3,4,4'-diphenylsulfidetricarboxylic acid or the anhydride thereof, 3,4,3'- or 3,4,4'-diphenylsulfonetricarboxylic acid or the anhydride thereof or the anhydride thereof 3,4,3'- or 3,4,4'-diphenylketonetricarboxylic acid or the anhydride thereof, 3,4,3'- or 3,4,4'-diphenylpropanetricarboxylic acid or the anhydride thereof, or mixtures thereof.
Claim 17
Dependent Claim
78 words
The coated articles of claim 1, wherein said divalent organic carboxylic acid or the anhydride thereof is an organic dicarboxylic acid or the anhydride thereof represented by general formula (VI) or (VII), respectively HOOC--R.sub.5 --COOH (VI) or ##STR36## in which R 5 is a divalent organic group selected from the group consisting of --CH.sub.2).sub.n.sbsb.2 in which n 2 is an integer of 1 to 8, ##STR37## in which R 3 is selected from the group consisting of ##STR38##
Claim 18
Dependent Claim
83 words
The coated article of claim 16, wherein said divalent organic carboxylic acid or the anhydride thereof is succinic acid, succinic anhydride, adipic acid, malonic acid, sebacic acid, phthalic acid, phthalic anhydride, isophthalic acid, terephthalic acid, naphthalene dicarboxylic acid having the formula ##STR39## dicarboxydiphenyl having the formula ##STR40## dicarboxydiphenylmethane, dicarboxydiphenyl ether, dicarboxydiphenyl sulfide, dicarboxydiphenyl sulfone, dicarboxydiphenyl ketone, dicarboxydiphenyl propane having the formula ##STR41## wherein R represents a methylene group, an oxygen atom, a sulfur atom, an --SO 2 group, ##STR42## group or mixtures thereof.
Claim 19
Dependent Claim
31 words
The coated articles of claim 1, wherein said 1,2,3,4-butanetetracarboxylic acid or the imide-forming derivative thereof is selected from the group consisting of 1,2,3,4-butanetetracarboxylic acid, 1,2,3,4-butanetetracarboxylic monoanhydride, 1,2,3,4-butanetetracarboxylic dianhydride, and dimethyl 1,2,3,4-butanetetracarboxylate.
Claim 20
Dependent Claim
75 words
The coated articles of claim 1, wherein said organic diamine is represented by the formula H.sub.2 N--R.sub.2 --NH.sub.2 in which R 2 is selected from the group consisting of --CH.sub.2)n.sub.1 wherein n 1 is an integer of 1 to 6, ##STR43## wherein R' 3 is selected from the group consisting of ##STR44## and R 4 is selected from the group consisting of a hydrogen atom, an alkoxy group, an alkyl group and a halogen atom.
Claim 21
Dependent Claim
51 words
The coated articles of claim 12, wherein said aromatic tricarboxylic acid or the anhydride thereof is represented by general formula (IV) or (V), respectively ##STR45## wherein R 1 is a trivalent aromatic group selected from the group consisting of ##STR46## wherein R 3 is selected from the group consisting of ##STR47##
Claim 22
Dependent Claim
94 words
The coated article of claim 20 wherein said aromatic tricarboxylic acid or the anhydride thereof is trimellitic acid or the anhydride thereof, hemimellitic acid or the anhydride thereof, trimesic acid or the anhydride thereof, 3,4,3'- or 3,4,4'-diphenyltricarboxylic acid or the anhydride thereof, 3,4,3'- or 3,4,4'-diphenylmethanetricarboxylic acid or the anhydride thereof, 3,4,3'- or 3,4,4'-diphenylether tricarboxylic acid or the anhydride thereof, 3,4,3'- or 3,4,4'-diphenylsulfidetricarboxylic acid or the anhydride thereof, 3,4,3'- or 3,4,4'-diphenylsulfonetricarboxylic acid or the anhydride thereof, 3,4,3'- or 3,4,3'-diphenylketonetricarboxylic acid or the anhydride thereof, 3,4,3'- or 3,4,4'-diphenylpropanetricarboxylic acid or the anhydride thereof, and mixtures thereof.
Claim 23
Dependent Claim
75 words
The coated articles of claim 12, wherein said organic diamine is represented by the formula H.sub.2 N--R.sub.2 --NH.sub.2 in which R 2 is selected from the group consisting of --CH.sub.2)n.sub.1 wherein n 1 is an integer of 1 to 6, ##STR48## wherein R' 3 is selected from the group consisting of ##STR49## and R 4 is selected from the group consisting of a hydrogen atom, an alkoxy group, an alkyl group and a halogen atom.
Claim 24
Dependent Claim
25 words
The coated articles of claim 1, wherein the equivalent ratio (OH/COOH) between the polyhydric alcohol component and the polycarboxylic acid component is 1.15 to 1.95.
Claim 25
Dependent Claim
19 words
The coated articles of claim 1, wherein the acid value of the carboxyl-containing polyesterimide resin is 50 to 120.
Claim 26
Dependent Claim
42 words
The coated articles of claim 1, wherein the reaction product of (A) a carboxyl-containing polyesterimide resin, (B) 1,2,3,4-butanetetracarboxylic acid or an imide-forming derivative thereof and (C) an organic diamine has an acid value in the range of from about 30 to 150.
Claim 27
Dependent Claim
34 words
The coated articles of claim 1, wherein said resin is dissolved in a volatilizable basic compound in an amount of about 0.3 to 3 equivalents based on the residual carboxyl groups in said resin.
Claim 28
Dependent Claim
18 words
The coated articles of claim 1, wherein the varnish has a pH of from about 5 to 9.
Claim 29
Dependent Claim
13 words
The coated article of claim 1, wherein said support is an electrical conductor.
Claim 30
Dependent Claim
13 words
The coated article of claim 28, wherein said electrical conductor is a wire.
Claim 31
Dependent Claim
14 words
The coated article of claim 29, wherein said wire is a soft copper wire.
Claim 32
Dependent Claim
49 words
The coated article of claim 1, wherein said coated article comprises an electric wire or cable as said support having thereon at least two electrically insulating layers, one of which comprises said baked layer of said water-soluble heat-resistant insulating varnish of claim 1 as an overcoat or a primer.
Claim 33
Dependent Claim
19 words
The coated article of claim 1, wherein said baked layer is based at a temperature above about 200° C.
Claim 34
Dependent Claim
14 words
The coated article of claim 32, wherein said temperature is 300° to 500° C.
Claim 35
Dependent Claim
43 words
The coated article of claim 12, wherein said aromatic tricarboxylic acid anhydride is represented by the general formula (II) ##STR50## in which R 1 is selected from the group consisting of ##STR51## wherein R 3 is selected from the group consisting of ##STR52##
Claim 36
Dependent Claim
49 words
The coated article of claim 34, wherein said aromatic tricarboxylic acid anhydride is selected from the group consisting of trimellitic anhydride, hemimellitic anhydride, 3,4,3'-or 3,4,4'-diphenyltricarboxylic anhydride, 3,4,3'-or 3,4,4'-diphenylmethanetricarboxylic anhydride, 3,4,3'-or 3,4,4'-diphenylethertricarboxylic anhydride, 3,4,3'-or 3,4,4'-diphenylsulfidetricarboxylic anhydride, 3,4,3'-or 3,4,4'-diphenylsulfonetricarboxylic anhydride, 3,4,3'-or 3,4,4'-diphenylketonetricarboxylic anhydride, 3,4,3'-or 3,4,4'-diphenylpropanetricarboxylic anhydride, and mixtures of these anhydrides.
Claim 37
Dependent Claim
35 words
The coated article of claim 1, wherein in the amount of the imide ring-containing glycol of the general formula (I) among the total amount of the (A) component is about 20 to 70% by weight.
Claim 38
Dependent Claim
33 words
The coated article of claim 36, wherein the amount of the imide ring-containing glycol of the general formula (I) among the total amount of the (A) component is 30 to 60% by weight.
Claim 39
Dependent Claim
38 words
The coated article of claim 4, wherein the amount of said organic metal compound is 0.1 to 50 parts by weight per 100 parts by weight of said resin comprising the reaction product of (A), (B) and (C).
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) | 1983-06-17 | 1983-12-17 | 1984-06-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-06-17 | 1987-12-17 | 1988-06-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-06-17 | 1991-12-17 | 1992-06-17 | $7700.00 | Window Closed / Lapsed |