CN1034380A - A kind of fluxing and fire-retarding insulation lacquer - Google Patents

Abstract

But the invention discloses a kind of be used for needn't removing after transformer and coil and so on electronic devices and components insulation processing its lead-in wire go up enamelled coating just the soldering multi pack by weldability resin, the fluxing and fire-retarding insulation lacquer that helps weldering monomer, fire retardant auxiliary flame retardant and thinner to be polymerized.It helps weldering: wetting power-62 dyne, zero 1,0.3 second friendship time; Flame retardant resistance: oxygen index 〉=27.5%; Boiling hot Xi Wendu is 250 ℃-280 ℃, and solidification value and speed are 20 ℃, and 24 hours or 80 ℃, 2 hours, insulation resistance was 4 * 10 ¹⁴Ω CM.It can be widely used in electronic devices and components insullac and handles back welding multi pack.

Description

A kind of fluxing and fire-retarding insulation lacquer

The present invention relates to the heavy chemicals lacquer, especially a kind of fluxing and fire-retarding insulation lacquer, but be used for needn't removing just soldering multi pack of the last enamelled coating of its lead-in wire after transformer and coil and so on electronic devices and components insulation processing.

Existing common electrical engineering insulation paint all is to hinder soldering, but the lead-in wire of the electronic devices and components after its insulation processing need go just soldering of enamelled coating on it before soldering.Its burning-point is low in addition, causes fire easily, and these shortcomings are brought difficulty to the welding of electron devices such as the range transformer of handling through insulation, coil lead-in wire.Though there is the weldability insullac of urethane type to come out in the market, but its tin sticky temperature is 375 ± 5 ℃, be higher than general tin pot and scald Xi Wendu and general electric iron welding temperature, use still inconvenience, and polyurethane paint is also undesirable aspect protection against the tide, insulativity.

The problems referred to above in view of prior art exists the purpose of this invention is to provide a kind of all good fluxing and fire-retarding insulation lacquer applied widely of soldering, flame retardant resistance, electrical property, humidity resistance and insulating property that helps.It by special synthetic weldability resin, help weldering monomer, fire retardant, auxiliary flame retardant and thinner to form.

The weldability resin that the present invention uses is to be polymerized under the initiator effect by acrylate, vinyl silanes and vinyl cyanide.Wherein acrylate can be selected methyl methacrylate, Jia Jibingxisuanyizhi, butyl methacrylate or butyl acrylate for use; Vinyl silanes can be selected vinyltrimethoxy silane or vinyltriethoxysilane for use; Initiator can be selected benzoyl peroxide or Diisopropyl azodicarboxylate for use.The copolymer resins that makes like this has good weldability, promptly under the soldering temperature, and resin melting and do not influence scolder and metallic contact and after welding, can produce to a certain degree crosslinking reaction.Resin itself has higher insulation resistance, less specific inductivity and dielectric loss and with metal good adhesive power is arranged.Its resinous molecular structure is as follows:

Its polymerization composition weight proportion is:

Acrylate 80-90%

Vinyl silanes 5-15%

Vinyl cyanide 3-8%

Initiator 0,15%

The present invention has particular requirement to helping the weldering monomer, and organic acid, organic amine salt and tensio-active agent etc. commonly used in the solder flux all are corrosive to metal, and the also moisture absorption that has can not be used in the insullac preparation.Therefore, the weldering monomer that helps among the present invention can be selected No. 1 complexing agent, No. 2 complexing agents or No. 3 complexing agents for use through extensive screening.These complexing agents add in the insullac can produce complex reaction with gold and silver, copper, tin, nickel, iron etc., and products therefrom is water insoluble, nonhygroscopic, also has electrical property preferably.It not only helps the weldering effect in welding, and the metallics in the energy complexing lacquer, improves the electrical property of lacquer.

Fire retardant of the present invention is vinylformic acid dibromopropyl ester or three (2, a 3-dibromopropyl) phosphoric acid salt.The fire retardant consumption is required to be more than 15% of amount of resin.If only use fire retardant in this lacquer, then flame retardant effect is relatively poor, therefore adds auxiliary flame retardant tributyl phosphate or the tritolyl phosphate of 3-5%, and then flame retardant effect significantly strengthens, and the fire retardant consumption can be reduced to 1/3-1/5 of former consumption.

Thinner of the present invention is gasoline, toluene, Virahol and N-BUTYL ACETATE.

According to materials of the present invention and proportioning polymeric insullac, its technical feature parameter is:

1, helps weldering: wetting power-62 dyne, zero 1,03 second friendship time (rosin flux: wetting power-65 dyne, zero 0,59 seconds friendship time);

2, scald Xi Wendu: 250-280 ℃;

3, flame retardant resistance: oxygen index 〉=27,5%(are higher than national standard);

4, solidification value and speed: 20 ℃, 24 hours or 80 ℃, 2 hours (general organic silicon insulating varnish solidification value is 120 ℃, 180 ℃ and 200 ℃);

5, insulation resistance: 4 * 10 ¹⁴Ω cm;

6, dielectric loss tg ⁶1.4 * 10 ^-2;

7, voltage breakdown 〉=60KV/mm;

8, package stability: skinning not at normal temperatures, never degenerate (alkyd neulating varnish skinning at normal temperatures is very fast).

Be not difficult to find out from above-mentioned performance perameter, fluxing and fire-retarding insulation lacquer of the present invention has not only solved in the past, and insullac has the shortcoming that hinders soldering, and it has weldering of helping, fire-retardant, protection against the tide and the good advantage of electrical property, the while insulating property are better than insullac such as urethane, polyester, epoxy, can be widely applicable for electronic devices and components welding multi pack.

Embodiment

Learn from else's experience distilled 20,35% butyl methacrylate, 13,5% methyl methacrylate, 2,7% vinyltrimethoxy silane, 2% vinyl cyanide, 38,5% No. 120 gasoline, 9,5% toluene, 7,5% N-BUTYL ACETATE, 2% Virahol and 0,05% benzoyl peroxide (initiator) is poured stainless steel cauldron or enamel reaction still container for stirring into, when stirring, connect thermal source, be heated to 82 ℃-85 ℃ (note: when temperature surpasses 90 ℃, can produce a large amount of reaction heat and dash material), reacted 1 hour, be warming up to 90 ℃-95 ℃, kept 1 hour, continue reaction 3-6 hour, add 0 at last, which fixed (No. 3 complexing agent) of 6%8-hydroxyl quinoline, 1,55% tritolyl phosphate and 1,75% 3 (2,3 one dibromopropyls) phosphoric acid salt, stirring gets final product.

Above materials proportioning is a weight proportion, it can be converted into volume ratio in preparation, prepares with counting cup meter.

Because materials of the present invention, such as industrial naptha, the things such as reaction monomers are inflammable thing, thus raw material deposit with proportioning in answer Fire Hazard Area. The motor that stirs usefulness in the reactor will be with fire-proof motor to ensure safety. In addition, should ventilate during batching, start ventilating fan, in case fuel gas is assembled overrich and caused fire.

Claims (5)

1; but a kind of be used for needn't removing after transformer and coil and so on electronic devices and components insulation processing its lead-in wire go up enamelled coating just the soldering multi pack by the weldability resin; help the weldering monomer; fire retardant; the fluxing and fire-retarding insulation lacquer that auxiliary flame retardant and thinner aggregate into; it is characterized in that its weldability resin is by acrylate; vinyl silanes and vinyl cyanide are polymerized under initiator Oxybenzene formyl or Diisopropyl azodicarboxylate effect; help the weldering monomer to select complexing agent for use No. 1; No. 2 complexing agents or No. 3 complexing agents; fire retardant is selected vinylformic acid dibromopropyl ester or three (2 for use; 3-dintrile propyl group) phosphoric acid salt; auxiliary flame retardant is selected tritolyl phosphate or tributyl phosphate for use, and thinner is a gasoline; toluene; Virahol and N-BUTYL ACETATE.

2,, it is characterized in that its weldability resin composition acrylate selects methyl methacrylate, Jia Jibingxisuanyizhi, butyl methacrylate or butyl acrylate for use according to the insullac of claim 1 regulation.

3,, it is characterized in that its weldability resin composition vinyl silanes can select vinyltrimethoxy silane or vinyltriethoxysilane for use according to the insullac of claim 1 regulation.

4, according to the insullac of claim 1,2 and 3 regulations, it is characterized in that its weldability resin composition weight proportion is:

Acrylate 80-90%

Vinyl silanes 5-15%

Vinyl cyanide 3-8%

Initiator 0,15%

5, according to the insullac of claim 1,2 and 3 regulations, it is characterized in that its composition weight proportion is:

Butyl methacrylate 20,35%

Methyl methacrylate 13,5%

Vinyltrimethoxy silane 2,7%

Acrylonitrile 2%

Benzoyl peroxide initiator 0.05%

8-hydroxyl quinoline any fixed (No. 3 complexing agents) 0,6%

Tritolyl phosphate 1,55%

Three (2,3, dibromopropyl) phosphoric acid salt 1,75%

No. 120 gasoline 38,5%

Toluene 9,5%

N-BUTYL ACETATE 7,5%

Virahol 2%