US4117032A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Wire coating powder
Assignee: Ranbar Electrical Materials Inc
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Filing: 1976-09-23
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Granted: 1978-09-26
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Expires: 1996-09-23
Abstract
Abstract A wire coating powder is prepared by first formulating a solventless, aromatic polyester-amide-imide which is the reaction product of an aromatic diamine, an aromatic compound consisting of trimellitic anhydride, acid, or acid halide, and about 35 to about 100 mole % in excess of the stoichiometric amount needed to react with said aromatic compound of polyol. A coating powder is prepared by hot melt mixing, cooling, and grinding a mixture of the polyester-amide-imide with straight polyester and a reactive solid or liquid aromatic monomer or prepolymer.
Inventors
- 👤 James R. Kwiecinski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:29
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/303; H01B3/306; C; C08; C08G; C08G73/00; C08G73/06; C08G73/10; C08G73/16; C08L; C08L79/00; C08L79/04; C08L79/08; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
205 words
A coating prepared by hot melt-mixing, cooling, and grinding (A) a coating powder composition which comprises a solventless, aromatic polyester-amide-imide which comprises the reaction product of (1) an aromatic diamine; (2) about 100 to about 110 mole % (of the stoichiometric amount needed to react with said diamine) of a trimellitic compound selected from the group consisting of trimellitic anhydride, trimellitic acid, trimellitic acid halide, and mixtures thereof; and (3) about 35 to about 100 mole % in excess of the stoichiometric amount needed to react with said trimellitic compound of a polyol, admixed with (B) an aromatic straight polyester in a weight ratio of about 9:1 to about 2:1, wherein said aromatic straight polyester is the reaction product of an aromatic straight polyester composition which comprises (1) about 25 to about 45 mole % of a non-cyclic polyol having 2 to 3 hydroxyals; (2) about 5 to about 15 mole % tris (2-hydroxy-ethyl)isocyanurate; (3) about 40 to about 60 mole % of an aromatic di-acid, di-ester, or di-functional mono-anhydride; and (4) about 0.1 to about 0.5 mole % of a catalyst; and (C) a reactive aromatic monomer, pre-polymer, or mixtures thereof in a weight ratio (to said polyester-amide-imide) of about 1:6 to about 1:9.
Claim 2
Dependent Claim
205 words
A coating prepared by hot melt-mixing, cooling, and grinding (A) a coating powder composition which comprises a solventless, aromatic polyester-amide-imide which comprises the reaction product of (1) an aromatic diamine; (2) about 100 to about 110 mole % (of the stoichiometric amount needed to react with said diamine) of a trimellitic compound selected from the group consisting of trimellitic anhydride, trimellitic acid, trimellitic acid halide, and mixtures thereof; and (3) about 35 to about 100 mole % in excess of the stoichiometric amount needed to react with said trimellitic compound of a polyol, admixed with (B) an aromatic straight polyester in a weight ratio of about 9:1 to about 2:1, wherein said aromatic straight polyester is the reaction product of an aromatic straight polyester composition which comprises (1) about 25 to about 45 mole % of a non-cyclic polyol having 2 to 3 hydroxyals; (2) about 5 to about 15 mole % tris (2-hydroxy-ethyl)isocyanurate; (3) about 40 to about 60 mole % of an aromatic di-acid, di-ester, or di-functional mono-anhydride; and (4) about 0.1 to about 0.5 mole % of a catalyst; and (C) a reactive aromatic monomer, pre-polymer, or mixtures thereof in a weight ratio (to said polyester-amide-imide) of about 1:6 to about 1:9.
Claim 3
Dependent Claim
14 words
A coating powder according to claim 1, wherein said non-cyclic polyol is ethylene glycol.
Claim 4
Dependent Claim
14 words
A coating powder according to claim 1, wherein said aromatic di-ester is dimethyl terephthalate.
Claim 5
Dependent Claim
14 words
A coating powder according to claim 1, wherein said catalyst is tetra isopropyl titanate.
Claim 6
Dependent Claim
26 words
A coating powder according to claim 1, wherein said aromatic straight polyester composition includes up to about 15 mole % of an unsaturated anhydride or di-acid.
Claim 7
Dependent Claim
14 words
A coating powder according to claim 5 wherein said unsaturated anhydride is maleic anhydride.
Claim 8
Dependent Claim
21 words
A coating powder according to claim 1 wherein said reactive solid aromatic monomer or prepolymer is a pre-polymer of diallyl isophthalate.
Claim 9
Dependent Claim
23 words
A coating powder according to claim 1 wherein said coating powder composition includes about 10 to about 15% of a highly cross-linked polyester.
Claim 10
Dependent Claim
19 words
A coating powder according to claim 8 wherein said highly cross-linked polyester is pre-reacted with the aromatic straight polyester.
Claim 11
Dependent Claim
54 words
A coating powder according to claim 8 wherein said highly cross-linked polyester is the reaction product of a composition which comprises about 40 to about 60 mole % THEIC and about 40 to about 60 mole % of a compound selected from the group consisting of aromatic di-acids, aromatic di-functional mono-anhydrides, and mixtures thereof.
Claim 12
Dependent Claim
23 words
A coating powder according to claim 1 wherein said coating powder composition includes about 0.1 to about 2% of a flow control agent.
Claim 13
Dependent Claim
14 words
A coating powder according to claim 1 wherein said trimellitic compound is trimellitic anhydride.
Claim 14
Dependent Claim
15 words
A coating powder according to claim 1 wherein said aromatic diamine is meta phenylene diamine.
Claim 15
Dependent Claim
45 words
A coating powder according to claim 1 wherein said polyol is selected from the group consisting of tris (2-hydroxyethyl) isocyanurate, a mixture of about 85 to about 95 mole % ethylene glycol, and about 5 to about 15 mole % triethylene glycol, and mixtures thereof.
Claim 16
Dependent Claim
45 words
A coating powder according to claim 1 wherein said reaction product includes about 3 to about 25 mole % (based on total moles in total reaction product) of a second aromatic compound selected from the group consisting of mono-anhydride, di-acid, tri-acid, di-ester, and mixtures thereof.
Claim 17
Dependent Claim
42 words
A coating powder according to claim 15 wherein said second aromatic compound is a mixture of about 0 to about 75 mole % trimellitic anhydride and about 0 to about 75 mole % dimethylterephthalate (based on total moles in that reaction product).
Claim 18
Dependent Claim
28 words
A coating powder according to claim 1 wherein said reaction-product is prepared with about 0.01 to about 1% by weight (based on reaction product weight) of a catalyst.
Claim 19
Dependent Claim
14 words
A coating powder according to claim 17 wherein said catalyst is tetra isopropyl titanate.
Claim 20
Dependent Claim
31 words
A coating powder according to claim 1 which includes up to about 17 mole % of an unsaturated compound selected from the group consisting of unsaturated monoanhydrides, di-acids, and mixtures thereof.
Claim 21
Dependent Claim
14 words
A coating powder according to claim 19 wherein said unsaturated compound is maleic anhydride.
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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) | 1981-09-25 | 1982-03-27 | 1982-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-25 | 1986-03-27 | 1986-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-25 | 1990-03-27 | 1990-09-26 | $7700.00 | Window Closed / Lapsed |