JPS59146108A - Method of producing self-adhesive wire - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention relates to a novel method for manufacturing a self-welding wire.

More specifically, we electrodeposited a thermosetting moisture molding electrodeposition paint,
The present invention relates to a method for producing a self-fusing electric wire, in which the electrodeposited layer is treated with an organic solvent, and after baking is cured, a resin composition that undergoes a curing reaction by both ultraviolet irradiation and heating is applied, and ultraviolet rays are irradiated.

In the production of electrical equipment fills, communications coils, etc., the conventional method of welding and integrating the wires by winding self-fusing wires and then heat-treating them is to perform face treatment and heat curing after winding. This method has many advantages over the conventional method, such as not requiring impregnating varnish and simplifying the process, and is particularly used for coils for small electric devices.

Conventionally, this type of self-fusing electric wire has been manufactured by manufacturing an ordinary enameled electric wire, then coating the surface with vinyl butyral resin, fenugreek resin, nylon, etc., and baking the wire. However, this type of self-fusing electric wire has various drawbacks, such as a complicated manufacturing process, a low adhesion between the wires during use, and the use of a large amount of solvent.

As a result of extensive research in order to improve the above-mentioned drawbacks, the inventors of the present invention formed an electrodeposited layer by an electrodeposition coating method using a water-molding electrodeposition paint, and treated the deposited layer with organic solvent vapor. However, it has been found that the above-mentioned drawbacks can be overcome by applying an ultraviolet curable resin composition after baking and irradiating it with ultraviolet rays. That is, in the present invention, the formed electrodeposited layer is treated with organic solvent vapor, baked, and then coated with an ultraviolet curable resin composition and irradiated with ultraviolet rays, thereby achieving good adhesion between the self-fusing wires. Therefore, a self-fusing electric wire that can be used in large numbers of people can be manufactured using a simple process of electrodeposition and ultraviolet irradiation, using almost no organic solvent during manufacturing, and the productivity can be significantly improved.

As the moisture-molding electrodeposition paint used in the present invention, moisture-molding electrodeposition paints such as acrylic, polyester, polyesterimide, and epoxy acrylic threads are preferably used.

The organic solvent for treating the electrodeposited layer used in the present invention is not particularly limited as long as it dissolves or swells the particles of the moisture-molded electrodeposition paint, and preferred examples include dimethylformamide and dimethyl acetate. Examples include amide, N-methylpyrrolidone, and the like.

The ultraviolet curable resin composition used as the adhesive layer used in the present invention is a composition containing both an ultraviolet curing catalyst and a heat curing catalyst.

The resin must be one that hardens both by UV rays and heat, has mechanical strength that can withstand winding after being irradiated with UV rays, and must be fused by heating after winding. , epoxy resin, etc. are preferred.

It is necessary to select catalysts for both of the above that do not interfere with the respective curing reactions, and examples of catalysts for ultraviolet curing include Lewis acid diazonium salts, BF, PIF6 or 81.
)37 as a heat curing catalyst such as an onium salt of F6 or a mixture of an aluminum complex and a silanol catalyst.
Preferred are boron fluoride amine complexes and the like. Weight ratio of ultraviolet curing catalyst OX1m heat curing catalyst is 0.6 to 1
．． A range of 2 is preferably used.

After the ultraviolet curable resin composition is applied, it is first brought into a B-stage state by irradiation with ultraviolet rays, and self-fusion becomes possible. Then, the uncured portion is cured by heating. The thickness of the fusion layer varies depending on the application, but it is preferably 6 to 10 μm from the viewpoint of adhesive strength after winding.

A schematic explanatory diagram of an apparatus for manufacturing a self-fusing electric wire using a moisture molding electrodeposition paint and an ultraviolet curable resin composition is shown in FIG. 1, and the manufacturing process will be explained based on the diagram.

In FIG. 1, (1) is a bare copper wire, which is moved in the direction of the arrow by a winding device. Bare copper wires are electrodeposited in an electrodeposition bath (2) containing moisture-forming electrodeposition paint, and then in a solvent treatment bath (2).
3) After being treated with the dimethylborumamide vapor in the inside and baked in baking ovens (4a) and (4b), an ultraviolet curable resin composition is applied in a resin bath (5), and after passing through a die (6), ultraviolet rays are applied. The self-fusing wire can be replaced by irradiating it with ultraviolet light in the irradiation furnace (A). Note that the drawing speed, electrodeposition conditions, ratio of the thickness of the electrodeposited film to the fusion layer, baking conditions, ultraviolet irradiation conditions, etc. can be freely changed depending on the purpose of use of the wire, required characteristics, etc.

Next, the method of the present invention will be explained with reference to Examples and Comparative Examples.

Production example 1 100! Add 0.10 lauryl sulfate ester soda to the reaction pot.
Step 9: 75 kg of ion-exchanged water was charged, and nitrogen gas was passed through it for about 60 minutes while stirring. After that, acrylonitrile 10 to 9, styrene 5kg, ethyl acrylate 3 to 9
, glycidyl methacrylate 1 to 9, methacrylic acid 1k
g of a mixed solution was added, and as a polymerization initiator, 9 to 0.08 ammonium persulfate and 0 to sodium bisulfite were added.
, add a solution of 0.5kg dissolved in 5.5kg of water, and add 70~7.
The reaction was carried out at 50C for 4 hours to obtain a water-resistant electrocoating paint (hereinafter referred to as A-1) with a non-volatile content of 19.4%.

Production example 2 100! Add 0.12 lauryl sulfate ester soda to the reaction pot.
9 and 75 ion-exchanged water were added, and nitrogen gas was passed through the solution for about 60 minutes while stirring. After that, 9 kg of acrylonitrile, 7 kg of α-methylstyrene, 2 kg of ethyl acrylate, a mixture of 1 part glycidyl methacrylate and 1 part methacrylic acid were added, and as a polymerization initiator, ammonium persulfate 0.10 kg and sodium bisulfite 0.0+k (Add a solution of y dissolved in 5 parts and 9 parts water, and add 75
The reaction was carried out at ~80°O for 4 hours to obtain a water-resistant electrocoated paint (hereinafter referred to as A-2) with a non-volatile content of 19.0%.

Production Example 3 60 kg of DIR431 (manufactured by Dow Chemical Company, novolak type epoxy resin) and Y-179 (manufactured by Ziba Geigy Co., Ltd., alicyclic epoxy resin) 40 and 9 were placed in a 100-kg container, and exposed to ultraviolet light while stirring at room temperature. As a curing catalyst, onium salt 4,4-dimethyldiphenyliodonium hexafluorophosphate 0.75 to 91H As a thermal curing catalyst, boron trifluoride monoethanolamine complex 0.75 to 9 and as a sensitizer 9 was added to 0.25 of anthraquinone and sufficiently dissolved to obtain an ultraviolet curable resin composition (hereinafter referred to as B-1).

Production Example 4 Epicor) 815 (Shell Chemical Co., Ltd., bisphenol type epoxy resin) 70 kg, Kobiko) 10 (11 (Shell Chemical Co., Ltd., bisphenol type epoxy resin) 10 kg and D) CR45120
9 and added triphenylsulfonium antimony fluoride o, s as an ultraviolet curing catalyst while stirring at room temperature.
kg, 9 to 0.5 of a monoethylamine complex of boron trifluoride as a heat curing catalyst and 9 to 0.25 of anthraquinone as a sensitizer were added and sufficiently dissolved to form an ultraviolet curable resin composition (hereinafter referred to as B). -2)
I got it.

Examples 1 to 4 Using the apparatus shown in Fig. 1, a bare copper wire with a diameter Q of 13 mm was run at a linear speed of 15 m/min using the water-dispersed g coating described in Table 1, and an electric current was measured. Approximately IOV of DC voltage was applied in the deposition tank (2) for electrodeposition, and dimethylformamide vapor treatment was performed in the treatment tank (3) at 150 to 200 oO.
Pass through a baking furnace (4a) at 0 to 300°0 in 15 seconds,
Subsequently, it was passed through a baking furnace (4b) at 300 to 400°O for 15 seconds. Thereafter, the ultraviolet curable resin composition shown in Table 1 was applied using a die in the resin tank (5), and the ultraviolet curable resin composition shown in Table 1 was applied using a mercury lamp with an output of 10 KW in the ultraviolet irradiation furnace (6).
The self-fused wires shown in Table 1 were obtained by irradiating ultraviolet rays at a drawing speed of ml'r).

The resulting self-fused 11 wires were tightly wound to a length of 50 mm on a mandrel with a diameter of 6 mm, and heated at 160°0 x 15 minutes at 180'0
A sample (closely wound film) was prepared by heating and curing under the following conditions: x 15 minutes and 200 oa x 15 minutes.

A load was applied to one end of the sample prepared under each of the above conditions at room temperature, and the weight of the sample to be disassembled, that is, the adhesive strength at room temperature, was measured, and the results are shown in Table 1. 160 again
10 for the sample prepared under the conditions of °C x 15 minutes.
The temperature at which an adhesive force of 0 g was maintained, heat shock, deterioration of winding, and breakdown voltage were measured and are shown in Table 1.

Comparative example Diameter opening using polyester moisture molding electrodeposition paint, 9
An electrodeposited layer was formed on a bare copper wire having a thickness of 1 mm, and the wire was passed through a baking furnace under the same conditions as in Example 1. Thereafter, a vinyl formal resin was applied by dip coating according to a conventional method to obtain the self-bonding wires shown in Table 1.

The obtained self-fused electric wire was tightly wound around a mandrel in the same manner as in Example 1, and heated and cured for 16,000×15 minutes to prepare a sample.

Using the prepared sample, the adhesive strength at room temperature, the temperature at which the adhesive strength of 100% was maintained, heat shock, deterioration winding, and breakdown voltage were measured in the same manner as in Example 1, and the results are shown in Table 1.

From the results in Table 1, it can be seen that the self-fusing electric wire according to the present invention has superior adhesion at room temperature and the temperature at which it maintains an adhesive strength of 100 mm, compared to electric wire obtained by the conventional dip coating method. .

[Brief explanation of the drawing]

FIG. 1 is a schematic explanatory diagram of a self-welding wire manufacturing apparatus. Agent Shin Kuzuno - (1 other person)

Claims (8)

[Claims] (1) Forming an electrodeposited layer by an electrodeposition coating method using a moisture-molding electrodeposition paint, and treating the deposited layer with organic solvent vapor;
A method of manufacturing a self-fusing electric wire by baking it, coating it with an ultraviolet curable resin composition, and irradiating it with ultraviolet light. (2) The manufacturing method according to claim (1), in which an epoxy acrylic electrodeposition paint is used as the moisture-molding electrodeposition paint. (3) The manufacturing method according to claim (1), in which a polyester electrocoating paint is used as the moisture-molding electrocoating paint. (4) The manufacturing method according to claim 1, in which dimethylformamide is used as the organic solvent vapor. (5) The manufacturing method according to claim (1), which uses the resin composition containing a heat curing catalyst as well as an ultraviolet curing catalyst as an ultraviolet curable resin composition. (6) The manufacturing method according to claim (1), using an epoxy resin composition as the ultraviolet curable resin composition. (7) Lewis acid diazonium salt, BIF4, as an ultraviolet curing catalyst contained in the ultraviolet curable resin composition;
The production method according to claim 1, using an onium salt of PF6 or 5bIF6, or a mixture of an aluminum complex and a silanol catalyst. (8) The manufacturing method according to claim (1), wherein a boron trifluoride amine complex is used as a thermosetting catalyst contained in the ultraviolet curable resin composition.