CN105385109B - A kind of composition epoxy resin and its purposes in dipping coil is prepared - Google Patents
A kind of composition epoxy resin and its purposes in dipping coil is prepared Download PDFInfo
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- CN105385109B CN105385109B CN201510981125.1A CN201510981125A CN105385109B CN 105385109 B CN105385109 B CN 105385109B CN 201510981125 A CN201510981125 A CN 201510981125A CN 105385109 B CN105385109 B CN 105385109B
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- epoxy resin
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- composition epoxy
- coil
- ureas
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L63/00—Compositions of epoxy resins; Compositions of derivatives of epoxy resins
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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
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
- C08G59/50—Amines
- C08G59/56—Amines together with other curing agents
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
- H01F41/12—Insulating of windings
- H01F41/127—Encapsulating or impregnating
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Epoxy Resins (AREA)
Abstract
The invention discloses a kind of composition epoxy resin, is made up of the component of following parts by weight,
Description
Technical field
The invention belongs to technical field of polymer materials, and in particular to a kind of composition epoxy resin and application thereof.
Background technology
Due to the good chemical product resistance of thermosetting epoxy resin, extraordinary thermal characteristics and power-mechanical characteristic with
And high electrical isolation capabilities and extensive use.In addition, epoxy resin shows the attachment good to many base materials, and therefore most
It is suitable for use in fibrous composite (composite).For the use in fibrous composite, the good of fiber both it is expected
Wetting, it is, the selected low viscosity for being used to prepare the resin formulation of composite, it is also desirable to high after being fully cured
Mechanical property.
The air reactor that power system uses at present, its coil can use glass fibre, and coiling is then together with wire
Dipping lacquer, live wet method coiling can also be used together with glass fibre, wire, impregnating resin, no matter but adopt how around
System, it is required for filling air gap existing for coil inside by resin, then curing molding is an entirety.Resin is in reactor line
Play filling air gap, heat transfer in circle, protection against the tide, prevent shelf depreciation etc..
Due to epoxy resin molecular structure reduce its viscosity and improve its heat resistance on be contradiction, so determine tree
The molecular structure of fat is difficult.No-solvent type thermosetting resin composition for impregnating dynamoelectric coil, generally use
Composition epoxy resin containing traditional bifunctional epoxy resin and acid anhydrides, as described in Japanese Unexamined Patent Application 60-5210 (1985).
Although epoxy resin available such as acid and/or anhydride-cured, some shortcomings are generally acknowledged.Acid and/or acid anhydrides
The system of solidification often to water sensitive and causes the Matrix lysis solidified.In addition, the curable epoxy resin composition comprising acid anhydrides
When for impregnating, substantial amounts of acid anhydrides steam in big chamber and in the event that an accident occurs, to the healthy shadow of operator
Sound is very big.In use, coil exposed changes in high humility and -40 DEG C to 150 DEG C of temperature.The system used at present is based on double
Phenol A epoxy resin/anhydride system, particularly it can degrade the system because of moisture at high temperature, and its crack resistance is also weaker,
Cause that it may occur in which crackle in and moisture can preferably permeate and cause more serious damage.
Accordingly, it is desirable to provide a kind of composition epoxy resin that can be used for coil, has the machinery for meeting requirement
While performance (such as toughness), there is good workability, the viscosity reduced.
The content of the invention
It is an object of the invention to provide a kind of composition epoxy resin, and it is when for preparing coil impregnating resin, tool
There is good mobility, be easy to process, at the same it is more environmentally-friendly.
Technical scheme is as follows：
A kind of composition epoxy resin, it is made up of the component of following parts by weight,
Wherein, the curing agent is the derivative of cyanamide and urea with 3：1-2：The liquid that 1 part by weight is mixed to form
Mixture, the derivative of urea are N, N- diethyl ureas, N, N- dipropyl ureas, N, N- Methylethyl ureas, and toughener is polyethers-poly-
Amine, thermal conducting agent are selected from AlN, BN, MgO, ZnO.
The epoxy resin is selected from bisphenol A-type, bisphenol-f type, bisphenol-s epoxy resin, and epoxide number is worked as 0.40-0.55
Amount/100g.
The ratio of the derivative of cyanamide and urea is 2 in the curing agent：1.
The pigment is selected from light blue, titanium dioxide, cadmium red etc..
The releasing agent is selected from wax class, calcium stearate, zinc stearate.
The fire retardant is selected from phosphonium flame retardant and nitrogenous flame ratardant.
Purposes of the above-mentioned composition epoxy resin in dipping coil is prepared.
When carrying out dipping coil using above-mentioned composition epoxy resin, the side of drip dipping or vacuum pressure impregnation etc. can be passed through
Formula is carried out.
Vacuum pressure impregnation is to include removing air, moisture and other pollutants from coil by means of the vacuum applied
And the process technology in these spaces is then substituted with dipping system.
Specific steps example is：
(1) coil windings are preheated into 5-6 hours in 100-120 DEG C of temperature, 60-80 DEG C is cooled to before cast；
(2) by composition epoxy resin at normal temperatures, deaeration 2.5-3.5 hours are stirred in vacuum 1-3mbar；
(3) coil windings are placed in pouring can under vacuum 3-4mbar states, vacuumize 2-3 hours；
(4) composition epoxy resin is poured into pouring can, keeps vacuum 4-5mbar, impregnate 1-3 hours；
(5) coil windings impregnated are placed in curing oven, 80 DEG C of holding 3-5 hours, 30-60 minutes are warming up to
90-100 DEG C, kept for 1.5-2 hours；30-60 minutes are warming up to 110-120 DEG C, are kept for 2.5-3 hours；30-60 minutes are warming up to
140-150 DEG C, kept for 10-15 hours, finally solidified.
Dipping coil, prepared using the above method.
Cyanamide and specific urea derivative are 3 in the present invention：1-2：The mixed of eutectic is formed in the range of 1 at normal temperatures
Compound, that is, liquid is formed, when it is used for epoxy-resin systems, relative to other solid-states of use, such as during the curing agent of powdered form,
Viscosity with reduction, it is easy to the flowing in dipping coil winding, is adapted to perfusion；And use dicyandiamide to substitute cyanamide, then
It cannot get the mixture of liquid；Relative to other liquid amine curing agents in the prior art, curing agent of the invention is in usage amount
In the case of few, it can still reach the solidification effect for meeting to require, the glass transition temperature of system is higher after solidification.
Curing agent in the present invention has good latency at normal temperatures, causes it not have to make using bicomponent system
Standby impregnating resin system.It is solvent-free in addition, without using solvent in the present composition, but it still has well
Mobile performance.
In composition epoxy resin of the present invention, with reference to above-mentioned LCM, polyether-polyamines have been used as toughener,
Because polyether-polyamines and epoxy resin have reactivity, ratio uses other toughener, such as polyethers, polycaprolactone after it solidifies
The block copolymer of block and polysiloxanes, has more excellent mechanical performance, such as a higher Tg, higher impact strength and
Bending strength.
Embodiment
Technical scheme is further detailed and described below by way of embodiment.
Epoxy resin is liquid bisphenol A type epoxy resin, epoxide number 0.51, from commercially available；
The polyether-polyamines of toughener 1 are Huntsman Products；
Toughener 2 is polypropylene glycol；
Curing agent 1：Cyanamide：N, N- diethyl urea (part by weight) are 2：1 liquefied mixture；
Curing agent 2：Cyanamide：N, N- diethyl urea (part by weight) are 3：1 liquefied mixture；
Curing agent 3：Cyanamide：N, N- diethyl urea (part by weight) are 5：1 mixture of powders；
Curing agent 4：Cyanamide：N, N- diethyl urea (part by weight) are 0.5：1 mixture of powders；
Curing agent 5：Liquid amine hardener, model Vestamin IPDA；
Curing agent 6：Dicyandiamide：N, N- diethyl urea (part by weight) are 3：1 mixture of powders；
Thermal conducting agent is AlN particles, and releasing agent is calcium stearate, and fire retardant is phosphate ester flame retardants, and pigment is titanium dioxide
Titanium.
Embodiment 1-4 and comparative example 1-5 each components dosage and properties of product are shown in Table 1.
Each component accurately is weighed, after being uniformly mixed, vacuumizes bubble removing, is solidified 2 hours prior to 90 times, Zhi Hou
120 times solidifications 3 hours, then solidification 10 hours is carried out at 140 DEG C, obtain cured article.
The measure of viscosity at 25 DEG C：Carried out on HAAKE Rheostress1 (mPa*s), with diameter 35mm and 1 ° of angle
Degree, shear rate 5.01/s, the sample used for epoxy resin and the mixture of curing agent, without other such as toughener,
The component of thermal conducting agent.
Tg is tested according to the twisting vibrations of ISO 6721 and determined；Bending strength uses the standard tests of ISO 178；Impact strength root
According to the standard tests of ISO 179/1, using the sample test after solidification.
Table 1：
By above-described embodiment and comparative example, composition of the invention spreads out as a result of the cyanamide and urea of liquid
Biology be used as curing agent, has the viscosity that substantially reduces, at the same the various mechanical performances of the epoxy resin cure product prepared and
It is substantially close using the curing agent of other solid-states, and relative to other liquid amine curing agents (comparative example 3) in the prior art, sheet
The curing agent of invention reaches close solidification effect in the case where dosage is less, i.e. curing agent of the invention has higher solidification
Efficiency.Secondly, by using polyether-polyamines as toughener, than using polyethers toughener such as polypropylene glycol (comparative example 5)
Product, which is made, has higher Tg, and more preferable mechanical performance, such as bending strength, impact strength.
Embodiment 5 (application examples)
(1) coil windings are preheated 6 hours in 100 DEG C of temperature, 60 DEG C is cooled to before cast；
(2) each raw material of composition epoxy resin will be accurately weighed in the ratio in embodiment 1, at normal temperatures, in vacuum
Spend and deaeration 3 hours is stirred in 1-3mbar；
(3) coil windings are placed in pouring can under vacuum 3mbar states, vacuumized 2 hours；
(4) composition epoxy resin is poured into pouring can, keeps vacuum 4mbar, impregnated 3 hours；
(5) coil windings impregnated are placed in curing oven, 80 DEG C are kept for 3 hours, are warming up to 90 DEG C within 30 minutes,
Kept for 1.5 hours；110 DEG C are warming up within 30 minutes, is kept for 2.5 hours；140 DEG C are warming up within 60 minutes, is kept for 10 hours, is carried out most
Final curing.
The foregoing is only a preferred embodiment of the present invention, therefore can not limit the scope that the present invention is implemented according to this, i.e.,
The equivalent changes and modifications made according to the scope of the claims of the present invention and description, all should still it belong in the range of the present invention covers.
Claims (4)
- A kind of 1. composition epoxy resin, it is characterised in that：It is made up of the component of following parts by weight,Wherein, the curing agent is the derivative of cyanamide and urea with 3：1-2：The liquid mixing that 1 part by weight is mixed to form Thing, the derivative of urea is N, and N- diethyl ureas, N, N- dipropyl ureas, N, N- Methylethyl ureas, toughener is polyether-polyamines, is led Thermit powder is selected from AlN, BN, MgO, ZnO；The epoxy resin is selected from bisphenol A-type, bisphenol-f type, bisphenol-s epoxy resin, epoxide number 0.4-0.55；The pigment is selected from light blue, titanium dioxide, cadmium red；The releasing agent is calcium stearate；The fire retardant is selected from phosphonium flame retardant and nitrogenous flame ratardant.
- 2. purposes of the composition epoxy resin of claim 1 in dipping coil is prepared.
- 3. the composition epoxy resin of usage right requirement 1 prepares dipping coil method, step is as follows：(1) coil windings are preheated into 5-6 hours in 100-120 DEG C of temperature, 60-80 DEG C is cooled to before cast；(2) by composition epoxy resin at normal temperatures, deaeration 2.5-3.5 hours are stirred in vacuum 1-3mbar；(3) coil windings are placed in pouring can under vacuum 3-4mbar states, vacuumize 2-3 hours；(4) composition epoxy resin is poured into pouring can, keeps vacuum 4-5mbar, impregnate 1-3 hours；(5) coil windings impregnated are placed in curing oven, 80 DEG C of holding 3-5 hours, 30-60 minutes are warming up to 90-100 DEG C, kept for 1.5-2 hours；30-60 minutes are warming up to 110-120 DEG C, are kept for 2.5-3 hours；30-60 minutes are warming up to 140- 150 DEG C, kept for 10-15 hours, finally solidified.
- 4. a kind of dipping coil, prepared using the method in claim 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510981125.1A CN105385109B (en) | 2015-12-23 | 2015-12-23 | A kind of composition epoxy resin and its purposes in dipping coil is prepared |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510981125.1A CN105385109B (en) | 2015-12-23 | 2015-12-23 | A kind of composition epoxy resin and its purposes in dipping coil is prepared |
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| CN105385109A CN105385109A (en) | 2016-03-09 |
| CN105385109B true CN105385109B (en) | 2017-12-29 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106130133A (en) * | 2016-08-19 | 2016-11-16 | 深圳市元征科技股份有限公司 | Wireless charging coil module and electronic product thereof |
| CN106782997B (en) * | 2016-11-28 | 2018-09-28 | 潍坊新力超导磁电科技有限公司 | A kind of superconducting coil and its manufacturing method |
| CN111508699B (en) * | 2020-04-21 | 2022-06-10 | 东莞市南祥磁电科技有限公司 | Method for reprocessing magnetic core powder after compression molding |
| CN112917782A (en) * | 2021-01-28 | 2021-06-08 | 中国航发长春控制科技有限公司 | Precision valve control coil encapsulation mold and encapsulation process method |
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| CN101870798B (en) * | 2010-06-29 | 2011-11-30 | 北京玻钢院复合材料有限公司 | Epoxy resin dough moulding compound and preparation method thereof |
| CN103045143A (en) * | 2012-11-14 | 2013-04-17 | 浙江华正新材料股份有限公司 | Halogen-free epoxy adhesive and cover film prepared by using halogen-free epoxy adhesive |
| CN104044231B (en) * | 2014-05-14 | 2016-09-07 | 广州仑利奇合成树脂有限公司 | A kind of non-post cured epoxy resin casting system |
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Effective date of registration: 20171204 Address after: 315400 Zhejiang city of Ningbo province Yuyao Ditang streets Huang Wan Village HD Applicant after: Yuyao Feite Plastics Co. Ltd. Address before: 315400 Xiao Lu Village, Simen Town, Yuyao City, Ningbo, Zhejiang Applicant before: Ningbo Compx Electrical Industrial Co., Ltd. |
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Effective date of registration: 20191104 Address after: No. 651, Hengxing Road, Puyuan Town, Tongxiang City, Jiaxing City, Zhejiang Province Patentee after: Zhejiang Joytech Electronics Co., Ltd. Address before: 315400 Gaoqing Bay, Huanghu Village, Lower Tang Street, Yuyao City, Ningbo City, Zhejiang Province Patentee before: Yuyao Feite Plastics Co. Ltd. |
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Address after: 314500 No. 651 Hengxing Road, Puyuan Town, Tongxiang City, Jiaxing City, Zhejiang Province Patentee after: Zhejiang Jiuyi Electronic Technology Co., Ltd Address before: No. 651, Hengxing Road, Puyuan Town, Tongxiang City, Jiaxing City, Zhejiang Province Patentee before: Zhejiang Joytech Electronics Co., Ltd. |