US4179423A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Water-soluble polyester imide resins
Assignee: SI Group Inc
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Filing: 1978-03-27
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Granted: 1979-12-18
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Expires: 1998-03-27
Abstract
Abstract Water soluble polyester-imide prepolymers are prepared (1) having 5 to 60%, preferably at least 35%, of moieties (2) an excess hydroxyl content in excess of 60% and preferably more than 100%, and (3) a number average molecular weight of 600-1300. To water solubilize the prepolymers formed, there are added amines, preferably tertiary amines. The products are useful as wire enamels. To enhance the thermoplastic flow of the enamel, there are added organic titanates.
Inventors
- 👤 Deno Laganis
- 👤 Paul M. Begley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:27
CPC Classifications
C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/16
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
128 words
A water soluble thermosetting second polyester - imide prepolymer composition prepared by reacting reactants consisting essentially of a tertiary amine and a first polyester - imide prepolymr having a number average molecular weight of 600-1300, an OH:COOH ratio of from 1.8:1 to 2.5:1 and an imide content of 5 to 60% based on the total imide and ester moieties, the alcohol of the ester moiety consisting essentially of 10 to 90% of the total equivalents of dihydric alcohol and the balance of the alcohol containing at least three hydroxyl groups, the acid component of the ester moiety consisting essentially of dicarboxylic acid, the imide moiety consisting essentially of the reaction product of approximately two moles of an aromatic monocarboxylic acid monoanhydride with one mole of an aromatic diamine.
Claim 2
Dependent Claim
128 words
A water soluble thermosetting second polyester - imide prepolymer composition prepared by reacting reactants consisting essentially of a tertiary amine and a first polyester - imide prepolymr having a number average molecular weight of 600-1300, an OH:COOH ratio of from 1.8:1 to 2.5:1 and an imide content of 5 to 60% based on the total imide and ester moieties, the alcohol of the ester moiety consisting essentially of 10 to 90% of the total equivalents of dihydric alcohol and the balance of the alcohol containing at least three hydroxyl groups, the acid component of the ester moiety consisting essentially of dicarboxylic acid, the imide moiety consisting essentially of the reaction product of approximately two moles of an aromatic monocarboxylic acid monoanhydride with one mole of an aromatic diamine.
Claim 3
Dependent Claim
11 words
A composition according to claim 1, including a titanate curing agent.
Claim 4
Dependent Claim
14 words
A composition according to claim 2, wherein the titanate is a water soluble titanate.
Claim 5
Dependent Claim
19 words
A composition according to claim 1, dissolved in water said composition being suitable for use as a wire enamel.
Claim 6
Dependent Claim
17 words
A composition according to claim 4, including a minor amount of a water soluble polar organic solvent.
Claim 7
Dependent Claim
13 words
A composition according to claim 5, including a water soluble titanate curing agent.
Claim 8
Dependent Claim
15 words
A composition according to claim 1, wherein the aromatic trimonocarboxylic acid monoanhydride is trimellitic anhydride.
Claim 9
Dependent Claim
15 words
A composition according to claim 7, wherein the alcohol of the ester moiety comprises tris(hydroxyethyl)isocyanurate.
Claim 10
Dependent Claim
19 words
A composition according to claim 8 wherein the acid of the ester moiety comprises terephthalic acid or isophthalic acid.
Claim 11
Dependent Claim
15 words
A composition according to claim 9, wherein the acid of the moiety comprises terephthalic acid.
Claim 12
Dependent Claim
26 words
A composition according to claim 10, wherein the acid of the moiety comprises a diimide-dicarboxylic acid wherein the imide groups are contained in five-membered imide rings.
Claim 13
Dependent Claim
26 words
A composition according to claim 11, wherein the moiety is the imide of 2 moles of trimellitic anhydride and 1 mole of oxydianiline or methylene dianiline.
Claim 14
Dependent Claim
21 words
A composition according to claim 12, wherein the imide is 35 to 55% of the total of imide and ester moieties.
Claim 15
Dependent Claim
16 words
A composition according to claim 13, wherein the ratio of OH:COOH is from 2.20 to 2.50:1.
Claim 16
Dependent Claim
13 words
A composition according to claim 14 including a titanate curing agent for polyesters.
Claim 17
Dependent Claim
12 words
A composition according to claim 15, wherein the titanate is water soluble.
Claim 18
Dependent Claim
31 words
A process for preparing the composition of claim 5 comprising dissolving first prepolymer in a water soluble polar organic solvent and then adding water, there also being added a tertiary amine.
Claim 19
Dependent Claim
61 words
A composition according to claim 5, wherein the organic solvent is N-methyl pyrrolidone, butyrolactone, dimethyl sulfoxide, diacetone alcohol, dioxane, a mono alkoxy ether of a glycol, a glycol, a ketone, a mono alkoxy ether of a glycol acetate, an alkanol or a dialkoxy ether of a glycol and is present in an amount of 10 to 40% of the total solvent.
Claim 20
Dependent Claim
21 words
A composition according to claim 5, wherein the tertiary amine is an alkyl alkanolamine, an alkyl morpholine or a hydroxyalkyl morpholine.
Claim 21
Dependent Claim
13 words
A composition according to claim 5, wherein the tertiary amine is dimethyl ethanolamine.
Claim 22
Dependent Claim
13 words
A composition according to claim 15, wherein the tertiary amine is dimethyl ethanolamine.
Claim 23
Dependent Claim
31 words
A composition according to claim 1 wherein the alcohol having at least three hydroxyl groups is tris (hydroxyethyl) isocyanurate, glycerine, trimethylol propane, 1,2,6-hexanetriol, pentaerythritol, trimethylol ethane or 3-methyl-1,3,5-hexanetriol or mixtures thereof.
Claim 24
Dependent Claim
31 words
A composition according to claim 4 wherein the alcohol having at least three hydroxyl groups is tris (hydroxyethyl) isocyanurate, glycerine, trimethylol propane, 1,2,6-hexanetriol, pentaerythritol, trimethylol ethane or 3-methyl-1,3,5-hexanetriol or mixtures thereof.
Claim 25
Dependent Claim
47 words
A composition according to claim 4 consisting essentially of (1) said second polyester-imide prepolymer, (2) the water soluble titanate curing agent and (3) a solvent which is either (a) water or (b) a mixture of water and a minor amount of a water soluble polar organic solvent.
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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) | 1982-12-17 | 1983-06-18 | 1983-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-17 | 1987-06-18 | 1987-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-17 | 1991-06-18 | 1991-12-18 | $7700.00 | Window Closed / Lapsed |