JPH02148512A - Electrical equipment - Google Patents

Abstract

PURPOSE:To obtain electric equipment that may produce little irritating odor after curing, by processing a predetermined amount of unsaturated polyester with a predetermined amount of bridged monomers and curing catalysts so as to cure them. CONSTITUTION:30 to 70 parts by weight of bridged monomers containing 70 to 30 parts by weight of unsaturated polyester and 3 to 50 parts weight of acrylic ester or methacrylic ester are processed with resin compounds containing organic acid metallic salt of cobalt mangan as curing catalysts and organic acid metallic salt of lead, zinc or tin, and thus cured. Electric equipment thus made produces little irritating odor after curing, and, by the use of resin components of excellent curing property and capable of being processed at low temperature and in a short time, it is made possible to achieve safety, laber-saving and speed-up in the manufacturing process of the electric equipment.

Description

Detailed Description of the Invention [Objective of the Invention] (Industrial Field of Application) The present invention provides insulation treatment using an unsaturated polyester resin composition that has little irritating odor after curing and can be cured at low temperatures and in a short time. Regarding electrical equipment that has been given.

(Prior Art) Unsaturated polyester resin compositions are relatively well-balanced in terms of mechanical, electrical, thermal properties, workability, price, etc., and are therefore widely used in various fields. It is particularly used for insulating electrical equipment, and because of its excellent workability, it is often used for coil impregnation and casting. This resin composition for electrical equipment is made by mixing unsaturated polyester with a crosslinking monomer and a curing catalyst, and then proceeding with the curing reaction using a radical polymerization initiator, but heat curing or ultraviolet curing is required to excite the radicals. be. Generally, an organic acid metal salt of cobalt or manganese is used as a curing catalyst, and styrene is used as a crosslinking monomer. Incidentally, in recent years, from the standpoint of saving labor and speeding up the manufacturing process, there has been a demand for curing resins at lower temperatures and in shorter times.

However, when the above-mentioned conventional unsaturated polyester resin compositions are cured at low temperatures for a short time, unreacted styrene tends to remain in the cured product, and its odor often becomes a problem. In particular, when treating stator coils of electric fans, ventilation fans, air conditioners, etc., curing time of approximately 20 to 30 minutes or more at a curing temperature of at least 120°C is required to cure the odor until it disappears, or a shorter period of time. Residual odor has been a practical problem during processing and low-temperature processing.

(Problems to be Solved by the Invention) The present invention has been made in view of the above circumstances, and provides an electrical device that generates little irritating odor even when subjected to low temperature and short time insulation treatment. It is.

[Constitution of the Invention (Means for Solving the Problems) As a result of intensive studies to achieve the above object, the present inventors found that styrene, acrylic ester or methacrylate as crosslinkable monomers By using cobalt or manganese organic acid metal salts and organic acid metal salts of lead, zinc, and tin together as curing catalysts, the copolymerizability of styrene can be increased and the above objective can be achieved. The present invention was completed by discovering what can be achieved.

That is, the present invention comprises 70 to 30 parts by weight of an unsaturated polyester, 30 to 70 parts by weight of a crosslinkable monomer containing 3 to 50% by weight of an acrylic ester or a methacrylic ester, and an organic compound of cobalt or manganese as a curing catalyst. The present invention is an electrical device characterized by being formed by processing and curing a resin composition containing an acid metal salt and an organic acid metal salt of lead, zinc, or a pot.

The unsaturated polyester used in the present invention is the same as the unsaturated polyester used in -m, and has an acid component, an alcohol component, and if necessary a modifying component of 150 to 22%.
It is obtained by reacting at 0°C, and there are no particular restrictions.

Acid components include unsaturated acids such as maleic acid, maleic anhydride, and fumaric acid, and saturated acids such as phthalic acid, isophthalic acid, terephthalic acid, tetrahydrophthalic acid, phthalic anhydride, tetrahydrophthalic anhydride, and adipic acid. , and fatty acids obtained from plants such as linseed oil and soybean oil, which can be used alone or in amounts of 2g! The above can be used in combination.

Alcohol components include ethylene glycol, propylene glycol, dipropylene glycol, diethylene glycol, neopentyl glycol, glycerin,
．． Examples include 3-butanediol, and these can be used alone or in a mixture of two or more.

Modified ingredients include linseed oil, soybean oil, tall oil,
Examples include xylene formaldehyde resin and dicyclopentadiene, and these can be used alone or in a mixture of two or more.

The crosslinking monomer used in the present invention is styrene and acrylic ester or methacrylic ester. Specific compounds include styrene, 2-hydroxyacrylate, 2-hydroxymethacrylate, 2-hydroxypropyl acrylate, 2-hydroxypropyl methacrylate, stearyl acrylate, stearyl methacrylate, lauryl acrylate, lauryl methacrylate, trimethylolpropane triacrylate, and trimethylol. Examples include propane trimethacrylate, and these can be used alone or in a mixture of two or more. And the acrylic ester or methacrylic ester is 3 to 50 f! relative to the crosslinkable monomer! % content. If the content is less than 3% by weight, high copolymerizability with styrene cannot be obtained, and if it exceeds 50% by weight, the viscosity of the resin composition increases, which is uneconomical and undesirable. More preferably 10 to 30% by weight. Weight%.

The blending ratio of the unsaturated polyester and the crosslinkable monomer is preferably 30 to 70 parts by weight of the crosslinkable monomer to 70 to 30 parts by weight of the unsaturated polyester.

If the amount of the crosslinking monomer is 30 parts by weight without grooves, the viscosity increases and fluidity deteriorates, which is undesirable. If it exceeds 70 parts by weight, the curability decreases and the product becomes brittle, which is not preferred.

The curing catalyst used in the present invention includes an organic acid metal salt of cobalt or manganese, lead, tin, etc. ! Use in combination with metal salts. Examples of the organic acid constituting the metal salt include naphthenic acid and octoic acid. In addition to these metal salts, metal salts of calcium, iron, zirconium, aluminum, titanium, etc. can be used. The blending ratio of lead, zinc or tin is preferably o, oos to 0.2% by weight as a metal content based on the entire composition.
If the blending amount is o or oos wt % without grooves, sufficient curability cannot be obtained, which is not preferable, and if it exceeds 0.2 wt %, surface adhesion may occur or the resin composition may become cloudy, which is not preferable. More preferably metal content 0.01-0.1
Within the range of % by weight.

The resin composition used in the present invention contains an unsaturated polyester, a crosslinkable monomer, and a curing catalyst, and can be cured by adding a curing agent and a polymerization inhibitor to this composition.

Examples of the curing agent include organic peroxides such as acyl peroxides such as benzoyl peroxide and acetyl peroxide, hydroperoxides such as tertiary-butyl peroxide, and ketone peroxides such as methyl ethyl ketone. The amount of curing agent added is generally within the range of 0.5 to 3% by weight based on the resin composition. Examples of the polymerization inhibitor used include quinones such as hydroquinone, paratertiary butylcatechol, and pyrogallol, and other commonly used ones. The resin composition thus obtained can be cured, that is, processed by coil impregnation, casting, etc., to produce electrical equipment.

As a method for impregnating electrical equipment, the commonly used dipping method, drip impregnation method, etc. are used, and the drip impregnation method is often adopted from the viewpoint of labor saving in the manufacturing process.

(Function) The electric device of the present invention can obtain effects by using a specific resin composition. That is, the amount of styrene can be reduced by substitution using an acrylic ester or a methacrylic ester as a crosslinkable monomer to improve the copolymerizability of styrene and reduce the irritating odor after curing. In addition, by using an organic acid metal salt of cobalt or manganese and an organic acid metal salt of lead, zinc, or tin as a curing catalyst, appropriate copolymerizability and curing with styrene can be obtained, and low temperature and short time processing can be achieved. becomes possible.

(Example) Next, the present invention will be explained by Examples, but the present invention is not limited by these Examples. In the following Examples and Comparative Examples, "1 part" means "part by weight". do.

Example 1 76.2 parts of maleic anhydride, isophthal f12153
．． 3 parts, 37.0 parts of tetrahydrophthalic anhydride, and 182 parts of propylene glycol.
The reaction was carried out at 0.degree. C. to synthesize an unsaturated polyester having an acid value of 21. 0.06 parts of hydroquinone, 77 parts of styrene, and 21 parts of 2-hydroxymethacrylate were added and dissolved in 100 parts of this unsaturated polyester, and then 0.1 part of a 6% solution of cobalt naphthenate and 6 parts of zinc naphthenate were added. Add 0.8 parts of % solution and stir to mix uniformly to obtain a resin composition. To 100 parts of this resin composition, add t-
Add and mix 1 part of butyl peroxyoctoate,
Coil temperature 90 when dripping onto stator coil for electric fan
℃1 drop amount 20g.

Drop impregnation treatment was performed under the conditions of a curing temperature of 110° C. and a curing time of 10 minutes. After cooling the stator coil after this drip impregnation treatment to room temperature, it is sealed in a tin can with an internal volume of 41,
The can was heated at 120° C. for 1 hour, and the concentration of styrene gas in the air inside the can was measured using the detection tube method, and the result was an extremely low value of about 50 ppra. After conducting an operation test for an hour in a closed room with an air volume of approximately 23m2 (6 tatami room) using an electric fan assembled with this stator coil, there was no styrene or other bad odor in the room.

Comparative Example 1 0.06 parts of hydroquinone and 100 parts of styrene were mixed and dissolved in 100 parts of the unsaturated polyester synthesized in Example 1, and 0.1 part of a 6% cobalt naphthenate solution was added and mixed to form a resin composition. Obtained. 1 part of the peroxide t-butyl peroxyoctoate was mixed with 100 parts of this resin composition and subjected to dropwise impregnation treatment in the same manner as in Example 1, and the styrene gas concentration was measured and found to be 280 ppI! Moreover, after the operation test in a closed room, the air inside the room had a strong pungent odor of styrene and other odors.

Example 2 81.8 parts of maleic anhydride, 98.8 parts of phthalic anhydride, 11924.3 parts of adipine, and 211.7 parts of diethylene glycol were reacted at 150 to 220°C to synthesize an unsaturated polyester with an acid value of 23. did. To 100 parts of this unsaturated polyester, 0.06 parts of hydroquinone was added, 80 parts of styrene, 13 parts of 2-hydroxymethacrylate, and 6 parts of 2-hydroxypropyl methacrylate were added and dissolved. ．．
1 part, and naphthenic acid! A resin composition was obtained by adding and mixing 0.4 part of a 915% solution. The stator coil was subjected to drip impregnation treatment in the same manner as in Example 1, and the styrene gas concentration was measured and found to be an extremely low value of 58 pant. Further, in the same manner as in Example 1, there was no styrene or other bad odor in the room after the 1 hour operation test in a closed room.

Comparative Example 2 0.06 parts of hydroquinone and 100 parts of styrene were mixed and dissolved in 100 parts of the unsaturated polyester of Example 2, and 0.1 part of a 6% cobalt naphthenate solution was added and mixed to obtain a resin composition. Ta. To 100 parts of this composition, 1 part of t-butyl peroxyoctoate as a hardening agent was added and mixed, and dropwise impregnation treatment was performed in the same manner as in Example 1. The styrene gas concentration was measured and was as high as 270 pp1M. ,
After the operation test in a closed room, the air in the room had a strong styrene odor, and the pond had a strong odor as well.

[Effects of the Invention] As is clear from the above explanation, the electrical equipment of the present invention has the following effects:
By using a resin composition with excellent curability that has little irritating odor after curing and can be processed at low temperatures and in a short time,
It is safe and can save labor and speed up the manufacturing process.

Patent applicant: Toshiba Chemical Corporation

Claims (1)

[Claims] 1 70-30 parts by weight of unsaturated polyester and 3-50% by weight of acrylic ester or methacrylic ester
30 to 70 parts by weight of a crosslinkable monomer, and a resin composition containing an organic acid metal salt of cobalt or manganese and an organic acid metal salt of lead, zinc or tin as a curing catalyst. and electrical equipment.