CN102911588A - Insulation stretch resistant coating, preparation method and application thereof - Google Patents
Insulation stretch resistant coating, preparation method and application thereof Download PDFInfo
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Abstract
The invention discloses an insulation stretch resistant coating, a preparation method and an application thereof. The coating comprises the following components of 15-35 parts of a polyester resin A, 5-25 parts of a polyester resin B, 3.5-5 parts of an amino resin, 0-0.5 part of an adhesion promoter, 0.1-0.2 part of a slip additive, 2.5-4 parts of a surface modification agent, 0.1-0.2 part of an antifoaming agent, 0.1-0.2 part of a flatting agent and 50-55 parts of an organic solvent. The method firstly mixing the polyester resin A, the polyester resin B, the amino resin and the organic solvent, and then adding and evenly mixing the adhesion promoter, the surface modification agent, the slip additive, a catalyst, the antifoaming agent and the flatting agent to obtain the insulation stretch resistant coating. The insulation stretch resistant coating is free from yellowing after the coating is roasted for 3 minutes at the temperature of 270 DEG C and capable of resisting high voltage of 1050V; the appearance of a capacitor paint film which is formed by deep-draw is flawless; the paint film is free from dissolution after-tack when soaked in carbon tetrachloride for 2 hours; and the paint film at the position of a notch of the capacitor is free from peeling off and foaming when the capacitor is cooked at the temperature of 100 DEG C for 30 minutes. Accordingly, the coating is wide in application prospect in electronic products.
Description
Technical field
The invention belongs to the technical field of insulation compound, particularly a kind of insulation stretch-proof coating and preparation method thereof and application.
Background technology
Society, more electronic products that gets up appear in people's life.Electronic product can use under varying environment, and namely requiring has enough resistivities to wet, hot, mould, salt fog etc.Moist particularly evident on the impact of element, therefore all needing to carry out coating, most of electronic component seals processing.This is the sfgd. of taking for insulation and moisture, can also play anti-machinery scratch and beautify the outward appearance effect.One of electrical condenser conduct device wherein has requirement as above too.
In recent years, the production of electronic capacitor was generally adopted after aluminium foil is stamping, adopted vacuum impregnation technique to apply coating.But this method production efficiency is low, coating quality is wayward, easily produces the seamed edge dead angle.At present, general production technique is the certain thickness coating of roller coat on rolls of aluminum foil, toasts encapsulation after the impact briquetting again.Be convenient to like this control of surface treatment and coating quality, improved greatly production efficiency, the volume aluminium of the complete coating of roller coat carries out deep-draw, the general 2:1 of aluminium foil electrical condenser length-to-diameter ratio, the unit elongation of paint film is not damaged about 200%, snappiness requirement to paint film is high, has the high broken characteristics that stretch in the deep-draw course of processing.Paint film must have higher insulativity simultaneously, when withstand voltage properties is not enough, can cause electric capacity to puncture.Simultaneously, the capacitor package that punching press is good arrives circuit card, can be through for several times high temperature weldering knot, and at high temperature, generally macromolecular material easily produces xanthochromia, has influence on the visual appearance of circuit card, therefore the temperature tolerance of paint film is also had higher requirements.Mainly by Japan and Korean company supply, curved black arc appearred to capacitor coating in capacitive surface after there was deep-draw in domestic coating in the market, and the stretch-proof performance is not up to standard, high pressure resistant not up to standard, and electrical condenser is behind 270 ℃ of lower baking 3min, and the xanthochromia amplitude is larger, has a strong impact on the product appearance quality.In the cleaning process of electrical condenser after production is complete, occur because coating curing not exclusively has anti-sticking phenomenon, affect the rate that manufactures a finished product.
Summary of the invention
The shortcoming that primary and foremost purpose of the present invention is to overcome prior art provides a kind of insulation stretch-proof coating with not enough.
Another object of the present invention is to provide the preparation method of described insulation stretch-proof coating.
A further object of the present invention is to provide described insulation stretch-proof Application of coatings.
Purpose of the present invention is achieved through the following technical solutions: a kind of insulation stretch-proof coating comprises following component by mass parts: 15～35 parts of vibrin A, 5～25 parts of vibrin B, 3.5～5 parts of amino resins, 0～0.5 part of adhesion promoter, increase 50～55 parts of 0.1～0.2 part of sliding auxiliary agent, 2.5～4 parts of surface modification auxiliary agents, 0.1～0.2 part of defoamer, 0.1～0.2 part of flow agent and organic solvents;
Described insulation stretch-proof coating also contains catalyzer 0.1～0.3 mass parts, more preferably contains catalyzer 0.2 mass parts;
The molecular chain of described vibrin A is long, good toughness, and active function groups is many, guarantees sticking power and chemical resistance;
Described vibrin A preferably prepares by the method that comprises following steps:
(1) diphenolic acid, acetic anhydride and pyridine are mixed, stir, after diphenolic acid dissolves fully, be heated to 75～80 ℃, obtain solution A; Under agitation condition, with behind solution A insulation 30～40min solution A being poured in 70～82 ℃ of hot water, use hot wash, vacuum-drying gets the diphenolic acid acetic ester of white powder;
(2) diphenolic acid acetic ester, diphenolic acid, 1,4 cyclohexane dimethanol and terephthalic acid are mixed, are heated to 180～200 ℃, carry out melt polymerization 2h～3h after, obtain vibrin A;
Wherein, diphenolic acid, acetic anhydride, pyridine, 1,4-cyclohexanedimethanol and terephthalic acid be (18～27) in mass ratio: (38～49): (0.05～0.2): (16～29): (15～20) proportioning, and the consumption of the diphenolic acid described in the consumption of the diphenolic acid described in the step (1) and the step (2) equates;
Vacuum drying operating parameters described in the step (1) is preferably in vacuum tightness 15000～16000Pa, vacuum-drying 8～10h under 70～80 ℃ the condition;
Described vibrin B is preferably a kind of among SK chemicals ES-710, Italkid 300, Dynapol L-952 and the novasynt 8810 or at least two kinds;
Described amino ester resin is etherify melamine resin, more preferably methyl alcohol butanols complex etherified melamine resin; The speed of low-temperature curing can improve in imino-functional group in the amino ester resin, and makes curing weightlessness seldom; Good hydrophobicity is provided simultaneously, thereby improves humidity and salt fog resistance performance; In the methyl alcohol butanols complex etherified melamine resin butoxy functional group is arranged, its existence can provide than other simple methyl-etherified resin has better wettability;
Described methyl alcohol butanols complex etherified melamine resin preferably obtains by the method that comprises following steps: be 37% formaldehyde, butanols, methyl alcohol and magnesiumcarbonate mixing with trimeric cyanamide, mass percent, be heated to 78～82 ℃, it is as clear as crystal that solution is observed in sampling, control pH value is 6.5～7, temperature is remained 94～96 ℃ again, add Tetra hydro Phthalic anhydride, the pH value of control reaction system is 4～5 after the dissolving; Normal pressure dehydration, decompression dealcoholysis (butanols and methyl alcohol) and formaldehyde obtain methyl alcohol butanols complex etherified melamine resin; Wherein, trimeric cyanamide, mass percent are in mass ratio 25:(18～20 of 37% formaldehyde, butanols, methyl alcohol, magnesiumcarbonate and Tetra hydro Phthalic anhydride): (25～30): (27～30): (0.1～0.15): (0.1～0.2) proportioning;
Described adhesion promoter is for improving the compound of coating and base material cohesive strength, the end of this type of adhesion promoter molecular chain contains two kinds of different functional groups, wherein a kind of functional group can react with substrate surface, and another kind of functional group can react with matrix resin;
Described adhesion promoter is preferably one or both in epoxy phosphate ester and the small component polyester;
Described epoxy phosphate ester is preferably one or both among Lubrizol 2061 and the HA2802;
Described small molecular weight polyester is preferably one or both among the modest SWD-DSP of moral and the modest ADP of moral;
The described standby relative molecular mass of the preferred micronization legal system of sliding auxiliary agent that increases is 800～1800 polyethylene (PE) or polytetrafluoroethylene (PTFE); Increase the major function of sliding auxiliary agent for improving smoothness, the scratch resistant of filming and improving water-repellancy; Utilize its lubrication, prevent that mould is to the scratch of paint film in punching course;
At least a in the preferred tosic acid of described catalyzer, naphthene sulfonic acid and the phosphoric acid;
Described surface modification auxiliary agent is preferably micron silica or nano silicon;
Described defoamer is preferably polyester resin change properties of organic silicon oxygen alkane or organic silicon modified by polyether oxygen alkane, and polyester modification polydimethylsiloxane more preferably is such as BYK051, BYK088 and BYK066N etc.;
Described flow agent is preferably one or both among EFKA-3777 and the BYK354;
A kind of among the preferred 1-Methoxy-2-propyl acetate of described organic solvent, diester DBE, Solvesso 100 and the Solvesso 150 or at least two kinds;
The preparation method of described insulation stretch-proof coating comprises the steps:
1. vibrin A, vibrin B, aminoresin and organic solvent are mixed, be uniformly dispersed, obtain mixture C;
2. with adhesion promoter, surface modification auxiliary agent, increase sliding auxiliary agent, catalyzer, defoamer and flow agent and put in the mixture C, be uniformly dispersed, stretch-proof coating obtains insulating; Wherein, each components in mass portion is counted: 15～35 parts of vibrin A, 5～25 parts of vibrin B, 3.5～5 parts of amino resins, 0～0.5 part of adhesion promoter, increase 0.1～0.3 part of 0.1～0.2 part of sliding auxiliary agent, 2.5～4 parts of surface modification auxiliary agents, 0.1～0.2 part of defoamer, 0.1～0.2 part of flow agent, 50～55 parts of organic solvents and catalyzer;
The dispersion of step described in 1. is preferably the speed dispersed with stirring by 500～700rpm;
The dispersion of step described in 2. is preferably the speed dispersed with stirring by 1100～1400rpm;
The application of described insulation stretch-proof coating in the preparation electronic product.
The present invention has following advantage and effect with respect to prior art:
Insulation stretch-proof coating provided by the invention for the preparation of electrical condenser have following advantage:
(1) heat resistance: 270 ℃ of bakings three minutes, without xanthochromia.
(2) high voltage withstanding: as to reach 1050v.
(3) the electrical condenser paint film appearance that becomes through deep-draw without damaged, without flaws such as curved black arcs.
(4) organic solvent-resistant such as CCl
4(tetracol phenixin) soaked 2 hours, and paint film returns sticking without dissolving.
(5) water boiling resistance: 100 ℃ of boiling 30min, the electrical condenser incision, paint film without peel off, foaming etc.
(6) printing: finished product coatingsurface printing ink, without coming off.
Embodiment
The present invention is described in further detail below in conjunction with embodiment, but embodiments of the present invention are not limited to this.
Embodiment 1
(1) preparation of vibrin A:
1. under the condition of nitrogen protection, in the reaction flask that induction stirring, thermometer, prolong are housed, add successively 9g diphenolic acid, 46g acetic anhydride and 0.1g pyridine, mix, after diphenolic acid dissolves fully, be heated to 80 ℃, obtain solution A; Under agitation condition, solution A is poured in 70 ℃ of hot water after solution A is incubated 30min, repeatedly use hot wash, 15999Pa, 70 ℃ of vacuum-drying 9.5h in the vacuum drying oven obtain the diphenolic acid acetic ester of white powder;
2. in the reaction flask that electric stirring, thermometer and vacuum decompression device are housed, add successively diphenolic acid acetic ester, 9g diphenolic acid, 16g 1 that 1. step prepares, 4-cyclohexanedimethanol and 20g terephthalic acid, mix, be heated to 200 ℃, start reliever and carry out melt polymerization 2h, obtain vibrin A.
(2) preparation of amino resin: in reactor, add successively the 25g trimeric cyanamide, the 18g mass percent is 37% formaldehyde, 30g butanols, 27g methyl alcohol and 0.1g magnesiumcarbonate, constant temperature stirs 1h, slowly be heated to 82 ℃ (solution is observed in sampling should be as clear as crystal), survey pH=6.5, be warming up to 95 ℃ of insulation reaction 1.5h, add the 0.2g Tetra hydro Phthalic anhydride, adjust pH is 4, unreacted alcohol (butanols and methyl alcohol) and formaldehyde are taken off in normal pressure dehydration, decompression, obtain required aminoresin after the purification process.
(3) preparation of insulation stretch-proof coating:
1. with vibrin A, the 10g vibrin B(SK chemicals ES-710 of 30g step (1) preparation), aminoresin and the organic solvent (31g Solvesso100 and 20g 1-Methoxy-2-propyl acetate) of 4.5g step (2) preparation drop into container, middling speed (600rpm) makes mixture C after disperseing 10min;
2. 3.9g surface modification auxiliary agent (silicon-dioxide that median size is 2 microns), 0.1g are increased sliding auxiliary agent (polyethylene, relative molecular weight is 1000), 0.2g catalyzer tosic acid, 0.1g defoamer BYK051,0.2g flow agent EFKA-3777 put in the mixture C, (1200rpm) disperses 30min to mix at a high speed, makes high insulation stretch-proof coating.
Embodiment 2
(1) preparation of vibrin A:
1. under the condition of nitrogen protection, in the reaction flask that induction stirring, thermometer, prolong are housed, add successively 13.5g diphenolic acid, 41g acetic anhydride and 0.15g pyridine, mix, after diphenolic acid dissolves fully, be heated to 75 ℃, obtain solution A; Under agitation condition, solution A is poured in 82 ℃ of hot water after solution A is incubated 40min, repeatedly use hot wash, 15999Pa, 75 ℃ of vacuum-drying 9h in the vacuum drying oven obtain the diphenolic acid acetic ester of white powder;
2. in the reaction flask that electric stirring, thermometer and vacuum decompression device are housed, add successively diphenolic acid acetic ester, 13.5g diphenolic acid, 26g 1 that 1. step prepares, 4-cyclohexanedimethanol and 16g terephthalic acid, mix, be heated to 180 ℃, start reliever and carry out melt polymerization 2.5h, obtain vibrin A.
(2) preparation of amino resin: in reactor, add successively the 25g trimeric cyanamide, the 20g mass percent is 37% formaldehyde, 25g butanols, 30g methyl alcohol and 0.15g magnesiumcarbonate, constant temperature stirs 1h, slowly be heated to 78 ℃ (solution is observed in sampling should be as clear as crystal), survey pH=6.8, be warming up to 95 ℃ of insulation reaction 1.5h, add the 0.1g Tetra hydro Phthalic anhydride, adjust pH is 5, and dehydration and purification obtains required aminoresin after processing.
(3) preparation of insulation stretch-proof coating:
1. with vibrin A, the 25g vibrin B(Italkid 300 of 15g step (1) preparation), aminoresin and the organic solvent (30.5g Solvesso100 and 20g 1-Methoxy-2-propyl acetate) of 5g step (2) preparation drop into container, middling speed (500rpm) makes mixture C after disperseing 10min;
2. the modest ADP of 0.5g adhesion promoter moral, 3.9g surface modification auxiliary agent (median size is the nano silicon of 120 nanometers), 0.2g being increased sliding auxiliary agent (MF-5PTFE), 0.2g catalyzer naphthene sulfonic acid, 0.1g defoamer BYK088,0.1g flow agent EFKA-3777 puts in the mixture C, (1300rpm) disperses 30min to mix at a high speed, makes high insulation stretch-proof coating.
Embodiment 3
(1) preparation of vibrin A:
1. under the condition of nitrogen protection, in the reaction flask that induction stirring, thermometer, prolong are housed, add successively 11.5g diphenolic acid, 41g acetic anhydride and 0.2g pyridine, mix, after diphenolic acid dissolves fully, be heated to 80 ℃, obtain solution A; Under agitation condition, solution A is poured in 70 ℃ of hot water after solution A is incubated 30min, repeatedly use hot wash, 15999Pa, 70 ℃ of vacuum-drying 9.5h in the vacuum drying oven obtain the diphenolic acid acetic ester of white powder;
2. in the reaction flask that electric stirring, thermometer and vacuum decompression device are housed, add successively diphenolic acid acetic ester, 11.5g diphenolic acid, 16g 1 that 1. step prepares, 4-cyclohexanedimethanol and 20g terephthalic acid, mix, be heated to 200 ℃, start reliever and carry out melt polymerization 2h, obtain vibrin A.
(2) preparation of amino resin: in reactor, add successively the 25g trimeric cyanamide, the 18g mass percent is 37% formaldehyde, 30g butanols, 27g methyl alcohol and 0.1g magnesiumcarbonate, constant temperature stirs 1h, slowly be heated to 82 ℃ (solution is observed in sampling should be as clear as crystal), survey pH=6.5, be warming up to 95 ℃ of insulation reaction 1.5h, add the 0.2g Tetra hydro Phthalic anhydride, adjust pH is 4, and dehydration and purification obtains required aminoresin after processing.
(3) preparation of insulation stretch-proof coating:
1. with vibrin A, the 8g vibrin B(Dynapol L-952 of 32g step (1) preparation), aminoresin and the organic solvent (19.9g Solvesso100 and 31g 1-Methoxy-2-propyl acetate) of 4.5g step (2) preparation drop into container, middling speed (600rpm) makes mixture C after disperseing 10min;
2. the modest SWD-DSP of 0.5g adhesion promoter moral, 4g surface modification auxiliary agent (silicon-dioxide that median size is 2 microns), 0.1g are increased sliding auxiliary agent (polyethylene, relative molecular weight is 1000), 0.2g catalyzer naphthene sulfonic acid, 0.1g defoamer BYK066N, 0.2g flow agent BYK354 put in the mixture C, (1200rpm) disperses 30min to mix at a high speed, makes high insulation stretch-proof coating.
Embodiment 4
(1) preparation of vibrin A:
1. under the condition of nitrogen protection, in the reaction flask that induction stirring, thermometer, prolong are housed, add successively 10g diphenolic acid, 38g acetic anhydride and 0.1g pyridine, mix, after diphenolic acid dissolves fully, be heated to 75 ℃, obtain solution A; Under agitation condition, solution A is poured in 82 ℃ of hot water after solution A is incubated 40min, repeatedly use hot wash, 15999Pa, 75 ℃ of vacuum-drying 9h in the vacuum drying oven obtain the diphenolic acid acetic ester of white powder;
2. in the reaction flask that electric stirring, thermometer and vacuum decompression device are housed, add successively diphenolic acid acetic ester, 10g diphenolic acid, 22g 1 that 1. step prepares, 4-cyclohexanedimethanol and 20g terephthalic acid, mix, be heated to 180 ℃, start reliever and carry out melt polymerization 2.5h, obtain vibrin A.
(2) preparation of amino resin: in reactor, add successively the 25g trimeric cyanamide, the 20g mass percent is 37% formaldehyde, 25g butanols, 30g methyl alcohol and 0.15g magnesiumcarbonate, constant temperature stirs 1h, slowly be heated to 78 ℃ (solution is observed in sampling should be as clear as crystal), survey pH=6.8, be warming up to 95 ℃ of insulation reaction 1.5h, add the 0.1g Tetra hydro Phthalic anhydride, adjust pH is 5, and dehydration and purification obtains required aminoresin after processing.
(3) preparation of insulation stretch-proof coating:
1. with vibrin A, the 8g vibrin B(Dynapol L-952 of 32g step (1) preparation), aminoresin and the organic solvent (30.1g Solvesso100 and 23g 1-Methoxy-2-propyl acetate) of 3.5g step (2) preparation drop into container, middling speed (500rpm) makes mixture C after disperseing 10min;
2. 0.3g adhesion promoter (epoxy phosphate ester Lubrizol 2061), 2.5g surface modification auxiliary agent (silicon-dioxide that median size is 3 microns), 0.1g are increased sliding auxiliary agent (polyethylene, relative molecular weight is 1000), 0.2g catalyzer phosphoric acid, 0.1g defoamer BYK066N, 0.2g flow agent BYK354 puts in the mixture C, (1300rpm) disperses 30min to mix at a high speed, makes high insulation stretch-proof coating.
Embodiment 5
(1) preparation of vibrin A:
1. under the condition of nitrogen protection, in the reaction flask that induction stirring, thermometer, prolong are housed, add successively 11.5g diphenolic acid, 49g acetic anhydride and 0.05g pyridine, mix, after diphenolic acid dissolves fully, be heated to 75 ℃, obtain solution A; Under agitation condition, solution A is poured in 82 ℃ of hot water after solution A is incubated 40min, repeatedly use hot wash, 15999Pa, 75 ℃ of vacuum-drying 9h in the vacuum drying oven obtain the diphenolic acid acetic ester of white powder;
2. in the reaction flask that electric stirring, thermometer and vacuum decompression device are housed, add successively diphenolic acid acetic ester, 11.5g diphenolic acid, 29g 1 that 1. step prepares, 4-cyclohexanedimethanol and 15g terephthalic acid, mix, be heated to 180 ℃, start reliever and carry out melt polymerization 2.5h, obtain vibrin A.
(2) preparation of amino resin: in reactor, add successively the 25g trimeric cyanamide, the 20g mass percent is 37% formaldehyde, 25g butanols, 30g methyl alcohol and 0.15g magnesiumcarbonate, constant temperature stirs 1h, slowly be heated to 78 ℃ (solution is observed in sampling should be as clear as crystal), survey pH=6.8, be warming up to 95 ℃ of insulation reaction 1.5h, add the 0.1g Tetra hydro Phthalic anhydride, adjust pH is 5, and dehydration and purification obtains required aminoresin after processing.
(3) preparation of insulation stretch-proof coating:
1. with vibrin A, the 5g vibrin B(Dynapol L-952 of 35g step (1) preparation), aminoresin and the organic solvent (28.6g Solvesso100 and 23g 1-Methoxy-2-propyl acetate) of 5g step (2) preparation drop into container, middling speed (500rpm) makes mixture C after disperseing 10min;
2. 0.3g adhesion promoter (epoxy phosphate ester Lubrizol 2061), 2.5g surface modification auxiliary agent (silicon-dioxide that median size is 1 micron), 0.1g are increased sliding auxiliary agent (polyethylene, relative molecular weight is 1000), 0.2g catalyzer naphthene sulfonic acid, 0.2g defoamer BYK066N, 0.1g flow agent BYK354 put in the mixture C, (1300rpm) disperses 30min to mix at a high speed, makes high insulation stretch-proof coating.
Comparative Examples 1
(1) preparation of amino resin: in reactor, add successively the 25g trimeric cyanamide, the 18g mass percent is 37% formaldehyde, 30g butanols, 27g methyl alcohol and 0.1g magnesiumcarbonate, constant temperature stirs 1h, slowly be heated to 78 ℃ (solution is observed in sampling should be as clear as crystal), survey pH=6.8, be warming up to 95 ℃ of insulation reaction 1.5h, add the 0.2g Tetra hydro Phthalic anhydride, adjust pH is 5, and dehydration and purification obtains required aminoresin after processing.
(2) preparation of insulation stretch-proof coating:
1. with 32g step (1) vibrin SKYBON ES – 320,8g vibrin B(DynapolL-952), aminoresin and the organic solvent (29.8g Solvesso100 and 23g 1-Methoxy-2-propyl acetate) of 4.4g step (2) preparation drop into container, middling speed (700rpm) makes mixture C after disperseing 10min;
2. 0.3g adhesion promoter (epoxy phosphate ester Lubrizol 2061), 2.5g surface modification auxiliary agent nano silicon, 0.2g are increased sliding auxiliary agent (polyethylene, relative molecular weight is 800), 0.2g catalyzer naphthene sulfonic acid, 0.9g defoamer BYK066N, 0.2g flow agent BYK354 put in the mixture C, (1300rpm) disperses 30min to mix at a high speed, makes high insulation stretch-proof coating.
Effect embodiment
The performance performance of the height insulation stretch-proof coating that above-described embodiment prepares is as shown in table 1:
Model preparation: the aluminium sheet of thickness 0.2～0.5mm is carried out the pre-treatments such as degreasing, chromaking, be coated in respectively on the above-mentioned aluminium sheet that cleans up with the height insulation stretch-proof coating of line rod spreader with each embodiment preparation, at 245 ℃ of baking 60～80s, build is controlled at 7～10 μ m.
Table 1: insulate stretch-proof coating property tabulation of the present invention
| Embodiment | Insulativity | Stretch-resistance | High thermal resistance | Printing | Otch | Outward appearance | Water boiling resistance | Anti-dose of immersion |
| Embodiment 1 | ◎ | Ο | ◎ | Ο | ◎ | ◎ | ◎ | Ο |
| Embodiment 2 | Ο | Ο | ◎ | Ο | Ο | ◎ | ◎ | ◎ |
| Embodiment 3 | ◎ | Ο | ◎ | ◎ | ◎ | Ο | ◎ | Ο |
| Embodiment 4 | Ο | ◎ | ◎ | ◎ | ◎ | Ο | Δ | Ο |
| Embodiment 5 | ◎ | Δ | ◎ | Ο | Ο | ◎ | ◎ | ◎ |
| Comparative Examples 1 | ◎ | ◎ | Ο | Ο | Ο | ◎ | Ο | Δ |
In the table 1:
(1) index of each performance perameter is (insulativity Hi-pot Tester, terminates at metal sheet one terminates at the coating top, can measure voltage breakdown):
◎: under the 1050V condition, without punch-through; Ο: under the 900V condition, without punch-through
Δ: under the 750V condition, without punch-through; *: under the 500V condition, without punch-through.
(2) stretch-resistance (it is that 6mm highly is the cup-shaped of 12mm that the substrate punching is become diameter, detects appearance of coat):
◎: when being coated with the floor height ratio of elongation without breakage, without black arc, without growing dim phenomenon; Ο: without damaged, the black arc of nothing, the electrical condenser bottom has slightly grows dim when being coated with the floor height ratio of elongation; Δ: breakage, black arc are arranged when being coated with the floor height ratio of elongation, seriously grow dim in the electrical condenser bottom; *: breakage, black arc are arranged during the low ratio of elongation of coating, seriously grow dim in the electrical condenser bottom.
(3) high thermal resistance (model toasts 3min under 270 ℃ of conditions):
◎: coating is without xanthochromia; Ο: coating has xanthochromia a little; Δ: coating xanthochromia amplitude is large, is light yellow; *: coating becomes Huang Jiaose.
(4) printing (model surface printing printing ink):
◎: printing ink is easy wettingly to be detected without coming off without shrinkage cavity, sticking power; Ο: printing ink is easy wettingly to come off on a small quantity without shrinkage cavity, sticking power Edge detected; Δ: the shrinkage cavity of ink pellet surface, sticking power detect to have and come off; *: printing ink can not wetted surface, and sticking power comes off when detecting fully.
(5) otch (after impacting into electrical condenser, observation incision coating shedding phenomenon):
◎: incision is without peeling off; Ο: incision has slight obscission; *: incision is seriously peeled off.
(6) outward appearance:
◎: coating gloss is high, is brilliant white; Ο: coating is transparent, is the aluminium true qualities; Δ: coating is more transparent, is slightly grey; *: coating is opaque, is muddy shape.
(7) water boiling resistance (the electrical condenser finished product is boiling 30min in 100 ℃ of water, observation incision coating shedding phenomenon):
◎: incision is without peeling off; Ο: incision has slight obscission; *: incision is seriously peeled off.
(8) anti-solvent soaking (tetracol phenixin soaked 2 hours):
◎: nothing bonding phenomenon between the electrical condenser; Ο: slight bonding phenomenon is arranged between the electrical condenser; *: bonding is serious between the electrical condenser, and coating has and comes off.
As seen from Table 1: the optimization of composition of the present invention, the height that obtains insulation stretch-proof coating solve present capacitor coating in heatproof, anti-deep-draw, the inadequate shortcoming of over-all properties balance such as withstand voltage, and the good percentage elongation that its paint film has, high temperature is xanthochromia, withstand voltage not; And coating is fit to the high-speed and continuous coating, has improved production efficiency.
Above-described embodiment is the better embodiment of the present invention; but embodiments of the present invention are not restricted to the described embodiments; other any do not deviate from change, the modification done under spirit of the present invention and the principle, substitutes, combination, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (10)
1. insulation stretch-proof coating is characterized in that comprising following component by mass parts: 15～35 parts of vibrin A, 5～25 parts of vibrin B, 3.5～5 parts of amino resins, 0～0.5 part of adhesion promoter, increase 50～55 parts of 0.1～0.2 part of sliding auxiliary agent, 2.5～4 parts of surface modification auxiliary agents, 0.1～0.2 part of defoamer, 0.1～0.2 part of flow agent and organic solvents;
Described vibrin A prepares by the method that comprises following steps:
(1) diphenolic acid, acetic anhydride and pyridine are mixed, stir, after diphenolic acid dissolves fully, be heated to 75～80 ℃, obtain solution A; Under agitation condition, with behind solution A insulation 30～40min solution A being poured in 70～82 ℃ of hot water, use hot wash, vacuum-drying gets the diphenolic acid acetic ester of white powder;
(2) diphenolic acid acetic ester, diphenolic acid, 1,4 cyclohexane dimethanol and terephthalic acid are mixed, are heated to 180～200 ℃, carry out melt polymerization 2h～3h after, obtain vibrin A;
Wherein, diphenolic acid, acetic anhydride, pyridine, 1,4-cyclohexanedimethanol and terephthalic acid be (18～27) in mass ratio: (38～49): (0.05～0.2): (16～29): (15～20) proportioning, and the consumption of the diphenolic acid described in the consumption of the diphenolic acid described in the step (1) and the step (2) equates;
Described vibrin B is a kind of among SK chemicals ES-710, Italkid 300, Dynapol L-952 and the novasynt 8810 or at least two kinds;
Described amino ester resin is etherify melamine resin.
2. insulation stretch-proof coating according to claim 1, it is characterized in that: described insulation stretch-proof coating also contains catalyzer 0.1～0.3 mass parts.
3. insulation stretch-proof coating according to claim 2 is characterized in that: described catalyzer is at least a in tosic acid, naphthene sulfonic acid and the phosphoric acid.
4. insulation stretch-proof coating according to claim 1, it is characterized in that: described amino ester resin is methyl alcohol butanols complex etherified melamine resin.
5. insulation stretch-proof coating according to claim 4, it is characterized in that: described methyl alcohol butanols complex etherified melamine resin obtains by the method that comprises following steps: be 37% formaldehyde, butanols, methyl alcohol and magnesiumcarbonate mixing with trimeric cyanamide, mass percent, be heated to 78～82 ℃, it is as clear as crystal that solution is observed in sampling, control pH value is 6.5～7, temperature is remained 94～96 ℃ again, add Tetra hydro Phthalic anhydride, the pH value of control reaction system is 4～5 after the dissolving; Normal pressure dehydration, decompression dealcoholysis and formaldehyde obtain methyl alcohol butanols complex etherified melamine resin; Wherein, trimeric cyanamide, mass percent are in mass ratio 25:(18～20 of 37% formaldehyde, butanols, methyl alcohol, magnesiumcarbonate and Tetra hydro Phthalic anhydride): (25～30): (27～30): (0.1～0.15): (0.1～0.2) proportioning.
6. insulation stretch-proof coating according to claim 1, it is characterized in that: described adhesion promoter is one or both in epoxy phosphate ester and the small component polyester;
It is described that to increase sliding auxiliary agent be that relative molecular mass is 800～1800 polyethylene or tetrafluoroethylene;
Described surface modification auxiliary agent is micron silica or nano silicon;
Described defoamer is polyester resin change properties of organic silicon oxygen alkane or organic silicon modified by polyether oxygen alkane;
Described flow agent is one or both among EFKA-3777 and the BYK354;
Described organic solvent is a kind of among 1-Methoxy-2-propyl acetate, diester DBE, Solvesso 100 and the Solvesso 150 or at least two kinds.
7. insulation stretch-proof coating according to claim 6 is characterized in that:
Described epoxy phosphate ester is one or both among Lubrizol 2061 and the HA2802;
Described small molecular weight polyester is one or both among the modest SWD-DSP of moral and the modest ADP of moral;
Described defoamer is the polyester modification polydimethylsiloxane.
8. the preparation method of each described insulation stretch-proof coating of claim 1～7 is characterized in that comprising the steps:
1. vibrin A, vibrin B, aminoresin and organic solvent are mixed, be uniformly dispersed, obtain mixture C;
2. with adhesion promoter, surface modification auxiliary agent, increase sliding auxiliary agent, catalyzer, defoamer and flow agent and put in the mixture C, be uniformly dispersed, stretch-proof coating obtains insulating; Wherein, each components in mass portion is counted: 15～35 parts of vibrin A, 5～25 parts of vibrin B, 3.5～5 parts of amino resins, 0～0.5 part of adhesion promoter, increase 0.1～0.3 part of 0.1～0.2 part of sliding auxiliary agent, 2.5～4 parts of surface modification auxiliary agents, 0.1～0.2 part of defoamer, 0.1～0.2 part of flow agent, 50～55 parts of organic solvents and catalyzer.
9. the preparation method of insulation stretch-proof coating according to claim 8 is characterized in that: step is separated into speed dispersed with stirring by 500～700rpm described in 1.;
Step is separated into speed dispersed with stirring by 1100～1400rpm described in 2..
10. the application of each described insulation stretch-proof coating of claim 1～7 in the preparation electronic product.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103773198A (en) * | 2014-01-08 | 2014-05-07 | 海宁永大电气新材料有限公司 | Impregnating resin for high-frequency and low-frequency electronic transformers |
| CN104031535A (en) * | 2014-06-26 | 2014-09-10 | 立邦涂料（天津）有限公司 | Novel low-matte polyester finish coating and preparation method thereof |
| CN106497360A (en) * | 2016-10-26 | 2017-03-15 | 安徽飞达电气科技有限公司 | A kind of organic-inorganic aluminium shell of capacitor high-quality coating paint |
| CN106497361A (en) * | 2016-10-26 | 2017-03-15 | 安徽飞达电气科技有限公司 | A kind of capacitor coating for the characteristic good of resistance to deep-draw and preparation method thereof |
| CN106893459A (en) * | 2017-04-13 | 2017-06-27 | 江门市德佑金属材料实业有限公司 | A kind of capacitor aluminum housing coating paint and its production and coating method |
| CN107400447A (en) * | 2017-08-13 | 2017-11-28 | 安徽康瑞高科新材料技术工程有限公司 | A kind of mute black coatings of mobile phone inner member |
| CN112538159A (en) * | 2020-11-24 | 2021-03-23 | 珠海长先新材料科技股份有限公司 | Resin for water-based bicycle paint and preparation method and application thereof |
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| CN103773198A (en) * | 2014-01-08 | 2014-05-07 | 海宁永大电气新材料有限公司 | Impregnating resin for high-frequency and low-frequency electronic transformers |
| CN103773198B (en) * | 2014-01-08 | 2016-08-31 | 海宁永大电气新材料有限公司 | A kind of high and low frequency electronic transformer impregnating resin |
| CN104031535A (en) * | 2014-06-26 | 2014-09-10 | 立邦涂料（天津）有限公司 | Novel low-matte polyester finish coating and preparation method thereof |
| CN104031535B (en) * | 2014-06-26 | 2016-10-05 | 广州立邦涂料有限公司 | A kind of low dumb light polyester finish coat and preparation method thereof |
| CN106497360A (en) * | 2016-10-26 | 2017-03-15 | 安徽飞达电气科技有限公司 | A kind of organic-inorganic aluminium shell of capacitor high-quality coating paint |
| CN106497361A (en) * | 2016-10-26 | 2017-03-15 | 安徽飞达电气科技有限公司 | A kind of capacitor coating for the characteristic good of resistance to deep-draw and preparation method thereof |
| CN106893459A (en) * | 2017-04-13 | 2017-06-27 | 江门市德佑金属材料实业有限公司 | A kind of capacitor aluminum housing coating paint and its production and coating method |
| CN107400447A (en) * | 2017-08-13 | 2017-11-28 | 安徽康瑞高科新材料技术工程有限公司 | A kind of mute black coatings of mobile phone inner member |
| CN112538159A (en) * | 2020-11-24 | 2021-03-23 | 珠海长先新材料科技股份有限公司 | Resin for water-based bicycle paint and preparation method and application thereof |
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