CN110713788A - High-breakdown-voltage polyesterimide wire enamel and preparation method thereof - Google Patents
High-breakdown-voltage polyesterimide wire enamel and preparation method thereof Download PDFInfo
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- CN110713788A CN110713788A CN201911044212.9A CN201911044212A CN110713788A CN 110713788 A CN110713788 A CN 110713788A CN 201911044212 A CN201911044212 A CN 201911044212A CN 110713788 A CN110713788 A CN 110713788A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D179/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen, with or without oxygen, or carbon only, not provided for in groups C09D161/00 - C09D177/00
- C09D179/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
- C09D179/08—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
- C08G73/16—Polyester-imides
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/002—Priming paints
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/63—Additives non-macromolecular organic
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/308—Wires with resins
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- Spectroscopy & Molecular Physics (AREA)
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- Organic Insulating Materials (AREA)
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Abstract
A high breakdown voltage polyesterimide wire enamel and a preparation method thereof. The formula is as follows: 55-80 parts of a seik modified polyesterimide resin; 40-50 parts of a solvent; 5-35% of a diluent; 0.1-3.0% of a catalyst; 0.2-5.0% of an auxiliary agent. Compared with the prior art, the material shows excellent performance. The product prepared by the invention is suitable for electromechanical industry.
Description
Technical Field
The invention relates to paint and a preparation method thereof, in particular to high-breakdown-voltage polyesterimide wire enamel and a preparation method thereof, and belongs to the technical field of chemical industry.
Background
The performance evaluation indexes of the wire enamel are comprehensive, the IEC standard and the national standard are mainly divided into a plurality of types of index requirements such as size, thermal property, mechanical property, electrical property, chemical property and the like, the properties are mutually influenced and mutually restrained, for example, the improvement of the heat resistance of a paint film is usually accompanied with the reduction of the mechanical property to a certain extent. The Polyesterimide (PEI) wire enamel is heat-resistant insulating enamel developed to meet the requirement of high heat resistance of a motor, and a 200-grade composite wire enamel produced by matching with Polyamideimide (PAI) wire finishing coat is widely applied and has continuously increased proportion in the wire enamel. The heat resistance is greatly improved, and the mechanical properties such as paint film adhesion, flexibility and the like are reduced to a certain extent compared with polyester wire enamel. Particularly, in the application occasions of aluminum enameled wires, large-sized enameled round copper wires, flat wires, varieties added with inorganic matters, such as corona-resistant enameled wires and the like, the adhesion of the polyesterimide enameled wire paint on conductors and the flexibility of a paint film become weak links, and even the polyesterimide enameled wire paint cannot meet the standard requirements in many cases.
The primer commonly used in the market at present is a product taking strong polar resin as a matrix, such as acetal, polyamide, epoxy and even 130-grade common polyester products. These products provide good adhesion and can significantly improve the mechanical properties of the enamel wire, but as a class 200 enamel wire, the low heat resistance of the primer greatly limits the overall thermal performance level of the enamel wire.
According to the regulations of the international electrotechnical commission standard IEC 60317 and the national standard GB 6109, the softening breakdown of a class 180 polyester-imide enameled wire requires no breakdown at 300 ℃ for 2 minutes, while the softening breakdown of a class 200 polyester-imide composite polyamideimide enameled wire requires no breakdown at 320 ℃ for 2 minutes. However, these standards are only the most basic requirements for heat resistance, and the actual requirements and the technical level at present far exceed the requirements in the standards. For example, the softening breakdown temperature of the Culex modified polyesterimide enameled wire produced by the current company and many wire enamel manufacturers on the market can reach 360 ℃ for 2 minutes without breakdown, and the softening breakdown temperature of the Culex modified polyesterimide composite polyamideimide enameled wire can reach 380 ℃ for 2 minutes without breakdown.
Even so, under the current technical level, the special requirements and the softening breakdown temperature of the enameled wire under the special wire diameter can not meet the requirements or can not stably meet the customer requirements, the performance margin is insufficient, and a large proportion of unqualified products is caused.
Therefore, the project aims to develop a high breakdown voltage polyesterimide wire enamel as a high breakdown voltage polyesterimide wire enamel.
Disclosure of Invention
The invention aims to provide a high-breakdown-voltage polyesterimide wire enamel and a preparation method thereof, so as to overcome the defects and shortcomings in the prior art.
The development aim of the project is to develop an enameled wire insulation primer with excellent high breakdown voltage, which can be used for primer coatings of enameled aluminum wires, large-size enameled round copper wires, enameled flat wires and corona-resistant enameled wires.
The principle of the invention is as follows:
the invention selects the seik modified polyester-imide resin, mainly utilizes the heat resistance and the insulating property thereof, and is one of the best materials with high breakdown voltage in the world at present.
The technical problem to be solved by the invention can be realized by the following technical scheme:
as a first aspect of the invention, a high breakdown voltage polyesterimide wire enamel is characterized in that the formulation is as follows according to parts by weight:
55-80 parts of a seik modified polyesterimide resin;
40-50 parts of a solvent;
5-35% of a diluent;
0.1-3.0% of a catalyst;
0.2-5.0% of an auxiliary agent.
Wherein the mosaic modified polyester-imide resin comprises the following components:
wherein, the solvent is any one or combination of cresol, phenol and aromatic solvent naphtha.
Wherein, the diluent comprises any one or a mixture of at least two of xylene, 1000# solvent oil and 1500# solvent oil.
Wherein, the catalyst includes but is not limited to any one or the mixture of two of n-butyl titanate and zinc acetate.
Wherein the auxiliary agent is an isocyanate blocking substance.
The preferable high breakdown voltage polyesterimide wire enamel is characterized in that: the formula comprises the following components in parts by weight:
the following modified polyester-imide resins:
solvent:
15-20 parts of cresol;
15-15% of phenol;
10-15 parts of aromatic solvent oil;
diluent agent:
3-15 parts of dimethylbenzene;
1-10% of 1000# solvent oil;
1-10 parts of 1500# solvent oil;
catalyst:
0.1-1.5 parts of n-butyl titanate;
0.1-1.5 parts of zinc acetate;
auxiliary agent:
0.2-5.0 parts of isocyanate sealing material.
As a second aspect of the present invention, a method for preparing a high breakdown voltage polyesterimide wire enamel is characterized by comprising the following steps:
(1) cresol and a monomer for synthesizing the mosaic modified polyesterimide are added into a reaction kettle and are stirred uniformly;
(2) gradually raising the temperature and distilling off reaction by-products, water and/or methanol during the raising of the temperature;
(3) after the distilled reaction byproducts reach the required quantity, cooling, and adding a solvent and a diluent to dissolve and cool;
(4) adding catalyst and assistant, stirring, filtering and barreling.
Wherein the seek modified polyesterimide resin in the step (1) is synthesized by adopting a one-step method, and dimethyl terephthalate (DMT) is added at room temperature by 15-20 percent; 20-25 parts of ethylene glycol; 5-10 g of mosaic (heat resistance); 5-10 parts of 4, 4' -diaminodiphenylmethane; 10-15 parts of trimellitic anhydride (TMA); and the temperature was increased during the addition.
Wherein, the cooling in the step (3) adopts a natural cooling, water cooling or oil cooling mode, and the solvent and the diluent are added in sequence of adding the solvent first and then adding the diluent; solvents include, but are not limited to, any one or a mixture of at least two of cresols, phenols and aromatic mineral spirits; the diluent comprises any one or a mixture of at least two of xylene, 1000# solvent oil and 1500# solvent oil;
wherein, the catalyst in the step (4) comprises but is not limited to any one or mixture of two of butyl orthotitanate and zinc acetate, and the auxiliary agent is isocyanate closure; stirring for 2-8 hr after adding all materials, filtering with bag filter with filtering precision of 1 μm, and packaging.
The invention has the beneficial effects that:
the research of the high breakdown voltage polyesterimide wire enamel and the preparation method. The performance of high breakdown voltage polyesterimide wire enamel products depends mainly on the structure of the resin.
The difficulty of the project is to keep the balance of the adhesive force and the breakdown resistance of the insulating paint, the adhesive force and the breakdown resistance of the resin are usually two contradictory performances, and the influence of the types, the proportions and the synthesis process of different reaction monomers on the final performance needs to be carefully selected and tested.
And (4) selecting and using an auxiliary agent. The auxiliary agent is called as monosodium glutamate in the paint industry, and plays a role of drawing dragon dots on certain special properties of the wire enamel. The selection of adhesion promoters with good heat resistance plays a significant role in the overall performance of the product, and careful screening and testing are required.
Detailed Description
The present invention will be further described with reference to the following examples. It should be understood that the following examples are illustrative only and are not intended to limit the scope of the present invention.
Examples 1 to 3
The formula of the high breakdown voltage polyesterimide wire enamel comprises the following components in parts by weight:
55-80 parts of a seik modified polyesterimide resin;
40-50 parts of a solvent;
5-35% of a diluent;
0.1-3.0% of a catalyst;
0.2-5.0% of an auxiliary agent.
The high breakdown voltage polyesterimide wire enamel comprises the following components in parts by weight:
the following modified polyester-imide resins:
solvent:
15-20 parts of cresol;
15-15% of phenol;
10-15 parts of aromatic solvent oil;
diluent agent:
3-15 parts of dimethylbenzene;
1-10% of 1000# solvent oil;
1-10 parts of 1500# solvent oil;
catalyst:
0.1-1.5 parts of n-butyl titanate;
0.1-1.5 parts of zinc acetate;
auxiliary agent:
0.2-5.0 parts of isocyanate sealing material.
TABLE 1 formulation units
As can be seen from Table 1, the invention is achieved by examples 1 to 3, and comparative examples 1 to 3 are commercially available conventional products.
Example 4
A preparation method of high breakdown voltage polyesterimide wire enamel comprises the following steps:
(1) cresol and a monomer for synthesizing the mosaic modified polyesterimide are added into a reaction kettle and are stirred uniformly;
(2) gradually raising the temperature to 220 ℃ at most, and distilling reaction byproducts, water and/or methanol while controlling the temperature to be 70-103 ℃; thus obtaining a seek modified polyesterimide resin solution;
(3) after the distilled reaction byproducts reach the required quantity, cooling, and adding a solvent and a diluent to dissolve and cool; the cooling adopts a natural cooling, water cooling or oil cooling mode, and a solvent and a diluent are added for dissolving and cooling, wherein the solvent and the diluent are added in the sequence of adding the solvent first and then adding the diluent;
(4) adding a catalyst and an auxiliary agent, wherein the catalyst is 0.1-1.5 of n-butyl titanate and/or 0.1-1.5 of zinc acetate; the auxiliary agent is 0.2-5.0 parts of isocyanate closure; stirring uniformly, filtering and barreling.
Table 2 the properties of the products were examined.
TABLE 2 units of experimental results
As can be seen from Table 2, the product obtained by the process of the present invention is excellent in properties.
While the present invention has been described with reference to the specific embodiments, the present invention is not limited thereto, and various changes may be made without departing from the spirit of the present invention.
Claims (10)
1. The high breakdown voltage polyesterimide wire enamel is characterized by comprising the following components in parts by weight:
55-80 parts of a seik modified polyesterimide resin;
40-50 parts of a solvent;
5-35% of a diluent;
0.1-3.0% of a catalyst;
0.2-5.0% of an auxiliary agent.
2. The high breakdown voltage polyesterimide wire enamel of claim 1 wherein: the modified polyester-imide resin comprises the following components in parts by weight:
3. the high breakdown voltage polyesterimide wire enamel of claim 1 wherein: the solvent is any one or combination of cresol, phenol and aromatic solvent oil according to parts by weight.
4. The high breakdown voltage polyesterimide wire enamel of claim 1 wherein: the diluent comprises any one or a mixture of at least two of xylene, 1000# solvent oil and 1500# solvent oil according to parts by weight.
5. The high breakdown voltage polyesterimide wire enamel of claim 1 wherein: the catalyst includes but is not limited to any one or two of butyl orthotitanate and zinc acetate according to the weight portion.
6. The high breakdown voltage polyesterimide wire enamel of claim 1 wherein: the auxiliary agent is an isocyanate closure in parts by weight.
7. The high breakdown voltage polyesterimide wire enamel according to any of claims 2 to 6, wherein: the formula comprises the following components in parts by weight:
the following modified polyester-imide resins:
solvent:
15-20 parts of cresol;
15-15% of phenol;
10-15 parts of aromatic solvent oil;
diluent agent:
3-15 parts of dimethylbenzene;
1-10% of 1000# solvent oil;
1-10 parts of 1500# solvent oil; catalyst:
0.1-1.5 parts of n-butyl titanate;
0.1-1.5 parts of zinc acetate;
auxiliary agent:
0.2-5.0 parts of isocyanate sealing material.
8. The method for preparing high breakdown voltage polyesterimide wire enamel according to claim 1, comprising the steps of:
(1) cresol and a monomer for synthesizing the mosaic modified polyesterimide are added into a reaction kettle and are stirred uniformly;
(2) gradually raising the temperature and distilling off reaction by-products, water and/or methanol during the raising of the temperature;
(3) after the distilled reaction byproducts reach the required quantity, cooling, and adding a solvent and a diluent to dissolve and cool;
(4) adding catalyst and assistant, stirring, filtering and barreling.
9. The preparation method of claim 8, wherein the modified polyesterimide resin of step (1) is synthesized by a one-step method, and dimethyl terephthalate (DMT) 15-20 parts by weight is added at room temperature; 20-25 parts of ethylene glycol; 5-10 g of mosaic (heat resistance); 5-10 parts of 4, 4' -diaminodiphenylmethane; 10-15 parts of trimellitic anhydride (TMA); and the temperature was increased during the addition.
10. The preparation method according to claim 8, wherein the temperature reduction in the step (3) adopts a natural cooling mode, a water cooling mode or an oil cooling mode, and the solvent and the diluent are added in sequence of adding the solvent first and then adding the diluent; solvents include, but are not limited to, any one or a mixture of at least two of cresols, phenols and aromatic mineral spirits; the diluent comprises any one or a mixture of at least two of xylene, 1000# solvent oil and 1500# solvent oil; the catalyst in the step (4) comprises but is not limited to any one or mixture of butyl orthotitanate and zinc acetate, and the auxiliary agent is isocyanate closure; stirring for 2-8 hr after adding all materials, filtering with bag filter with filtering precision of 1 μm, and packaging.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911044212.9A CN110713788A (en) | 2019-10-30 | 2019-10-30 | High-breakdown-voltage polyesterimide wire enamel and preparation method thereof |
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| CN201911044212.9A CN110713788A (en) | 2019-10-30 | 2019-10-30 | High-breakdown-voltage polyesterimide wire enamel and preparation method thereof |
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| CN110713788A true CN110713788A (en) | 2020-01-21 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112226154A (en) * | 2020-10-20 | 2021-01-15 | 安徽晟然绝缘材料有限公司 | High-strength polyesterimide wire enamel and preparation method thereof |
| CN115926616A (en) * | 2022-11-30 | 2023-04-07 | 珠海格力新材料有限公司 | Heat-resistant wire enamel and preparation method thereof |
-
2019
- 2019-10-30 CN CN201911044212.9A patent/CN110713788A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112226154A (en) * | 2020-10-20 | 2021-01-15 | 安徽晟然绝缘材料有限公司 | High-strength polyesterimide wire enamel and preparation method thereof |
| CN115926616A (en) * | 2022-11-30 | 2023-04-07 | 珠海格力新材料有限公司 | Heat-resistant wire enamel and preparation method thereof |
| CN115926616B (en) * | 2022-11-30 | 2024-02-23 | 珠海格力新材料有限公司 | Heat-resistant wire enamel and preparation method thereof |
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Application publication date: 20200121 |