JPS58179214A - Resin composition - Google Patents

Abstract

PURPOSE:A resin composition, containing an unsaturated polyester resin, and a compound having a specific structure respectively in a specific proportion, and capable of preventing the noise in transformers of power sources, and improving the drying property and curability of a resin to be in contact with the copper surface and appearance of cured varnishes at the same time. CONSTITUTION:A resin composition obtained by incorporating 100pts.wt. unsaturated polyester resin, e.g. prepared by reacting an acidic component such as maleic acid with an alcoholic component such as propylene glycol, if necessary reacting the resultant product with a modifying component such as linseed oil, and dissolving the reaction product in a crosslinking monomer such as styrene, with 5-30pts.wt. compound expressed by the formula (R1 is 2-6C alkylene or 4-6C alkyleneheteroakylene; R2 is H or methyl), e.g. prepared by esterifying an adduct of dicyclopentadiene with a glycol with acrylic acid, etc. A curing accelerator and if necessary a polymerization inhibitor are added thereto to give the aimed cured article. USE:Impregnating coils of electrical apparatuses, etc.

Description

[Detailed description of the invention] Unsaturated polyester resin is electrically 8 mechanically.

Thermal properties 9 Workability 1 Well-balanced in terms of price, it is used for a variety of purposes including FRP laminates, and can also be used for electrical insulation. It is often used for casting.

The present invention relates to a resin composition V used for impregnating coils of electrical equipment such as discharge lamp ballasts and small power transformers when energized.
C@, and provides a resin composition with excellent adhesion and anti-vibration effects.

In electricity*a such as discharge lamp ballasts and small power transformers, noise is generated due to the vibration of the iron core due to magnetostriction and magnetic force and the vibration of the coil due to electromagnetic force when electricity is applied once. In order to prevent this noise, the iron core and coil are impregnated with an unsaturated polyester resin that has excellent adhesion to the coil.
In the case of a type transformer 1.For example, the core size is 80~120■
A rather large power transformer, such as a power transformer, produces a lot of noise.

In general, rounding to prevent noise is done by making unsaturated polyester resin flexible to prevent vibrations, or by increasing the adhesion force to prevent vibrations from occurring at all, although this varies depending on the structure of the equipment. There is. Generally, when rounding unsaturated polyester resin to make it lubricant, the resin composition is modified with vegetable oil and a material that is lubricated with alcohol, acid components, and alcohol components is used. Even if it is possible to completely cure the resin, it will seriously inhibit the hardening of the parts that come into contact with the steel surfaces used in electrical equipment, and the cured product will often wrinkle or lose its luster, resulting in poor appearance. .

As a result of our studies, the present inventors have found that mixing a specific compound f with unsaturated polyester resin can prevent transformer noise.
We have discovered that it is possible to simultaneously improve the drying properties and curability of the resin in contact with the copper surface, as well as the appearance of the cured face.

The present invention relates to a monolipid composition comprising an unsaturated polyester resin @10 parts and 5 to 30 parts by weight of a compound represented by the following formula (1).

OR: However, R+ is an alkylene group having 2 to 6 carbon atoms or carbon
84-6 alkyleneheteroalkylene group.

Rz is hydrogen or a methyl group.

As the unsaturated polyester resin of the present invention.

The following acid components, alcohol components, and if necessary modifying components are reacted to dissolve the crosslinkable monomer and used.

The acid components are maleic acid and maleic anhydride.

Unsaturated acids such as fumaric acid, phthalic acid, phthalic anhydride, isophthalic acid, terephthalic acid, tetrahydrophthalic acid, tetrahydrophthalic anhydride, saturated acids such as hexahydrophthalic anhydride, adipic acid, cepatic acid, etc. Fatty acids obtained from acids, soybean oil, linseed oil, tall oil, etc. are used.

As the alcohol component, propylene glycol, ethylene glycol, dipropylene glycol, diethylene glycol, 1,3-butanediol, neopentyl glycol, 1,6-hexanediol, glycerin, trimethylolpropane, pentaerythritol, etc. are used. Furthermore, as a modification component, linseed oil, soybean oil, tall oil, dehydrated castor oil, coconut oil, synchlopentadiene, cyclobentadiene, etc. may be used as necessary.

The compound represented by formula +11 is obtained by esterifying an adduct of dicyclopentadiene and glycol with acrylic acid or methacrylic acid.

The alkylenoheteroalkylene group contains oxygen or a binding atom.

y +) The alcohol is ethylene glycol.

Propylene glycol, 1,3-butanediol.

1.6-hexanediol, neopentyl glycol,
Diethylene glycol, dipropylene glycol, etc. can be used. The method for producing the compound represented by formula (11) is to first react dicyclopentageno and glycol in approximately equimolar amounts at 100 to 120°C for 3 to 7 hours under an acidic catalyst,
Glycol is added to synclopentagene. Next, the terminal OH group of this adduct is subjected to an esterification reaction with acrylic acid or methacrylic acid at 70 to 120°C for 2 to 5 hours using an acidic catalyst, and the resulting reaction product is neutralized with an alkaline component, and then washed with water. death.

Manufactured by vacuum distillation of alkaline content and water.

Use 1 of the compound represented by formula (11) is an unsaturated polyester tree 1 in which an unsaturated polyester is dissolved in a crosslinkable monomer.
The amount is 5 to 30 parts by weight relative to 11,100 parts by weight, and if it is less than 5 parts by weight, the effect of preventing vibration during energization will be small, and if it exceeds 30 parts by weight, wrinkles will appear on the surface of the cured resin.

In addition, if the vinyl chloride lead wire attached to the electric machine 4 is bent at a low temperature because the cured product becomes too hard, the vinyl chloride coating will become hard. This is not preferable because it tends to cause cracks.

Examples of crosslinkable monomers used in the unsaturated polyester resin include stinne or its derivatives, -functional acrylic esters or Nisder methacrylates, various allyl esters,
Various allyl ethers can be used, and the amount used is preferably in the range of 30 to 7011 parts by weight per 100 parts by weight of the resin composition.

In the present invention, the mixing method of the unsaturated polyester, the crosslinkable monomer, and the compound represented by the formula ill is not limited to 1%.

As curing agents for the resin composition of the present invention, acyl peroxides such as benzoyl peroxide and acetyl peroxide, hydroperoxides such as tert-butyl peroxide, and cumene hydroblast;
Ketone peroxides such as methyl ethyl ketone peroxide and cyclohexanone peroxide 11ide.

Dialkyl peroxides such as ditanyabutyl peroxide, dicumyl peroxide, tertiary butyl peroxide, oxyperoxides such as tertiary butyl peroxy acetate, etc. can be used, and the amount used is generally 100% of the resin composition. 0.5 for heavy lid part
~5 parts by weight, preferably 1 to 3 parts by weight. Further, if necessary, gold xi such as cobalt, manganese, iron, lead, etc. of naphthenic acid or octenoic acid can be used as a curing accelerator, and the amount used is 0.000% per 1 part by weight of the resin composition.
A range of 1 to 5 parts by weight is preferred.

In addition, if necessary, as a polymerization inhibitor, .

Quinones such as pyrogallol and other commonly used ones can be used, and the amount used is 100% of the resin composition.
The range of 0 to 0.1 parts by weight is preferred.

Examples and comparative examples are shown below. Parts are parts by weight.

Example 1, Production of unsaturated polyester tree 11 wA Soybean oil fatty acid 35 parts, m-water tetrahydrophthalic acid 10 parts, maleic anhydride 15 parts, dipropylene glycol 20 parts, diethylene glycol 20 parts, hydroquinone 0.024'fl
Heat for 10 hours at -210°C, acid value 20
．． Synthesized unsaturated polyester of 5. 50 parts of styrene was dissolved in 50 parts of unsaturated polyester with stirring.

An unsaturated polyester resin was produced.

2 Production of dicyclopentaoxyethyl acrylate and methacrylate Dinoclopentadiene 132M, ethylene glycol 6
2 parts, 1 part of paratoluenesulfonic acid O, S part (Foundation) 1 part
After reacting at 20°C for 4 hours, the mixture was heated to 80°C, and further reacted with 72 parts of acrylic acid at 90°C for 5 hours. Dicyclopentaoxyethyl acrylate was obtained by distillation.

In addition, ')/chlorobentaoxyethyl methacrylate, 132 m of dicyclopentadiene, 62 parts of ethylene glycol, and 08 parts of para-toluenesulfonic acid were added to -kz1
After reacting at 20°C for 4 hours, the temperature was lowered to 80°C, and further 86 parts of methacrylic acid and 08 parts of para-toluenesulfonic acid were added to neutralize the alkali, wash with water, and then remove the alkali content and water by vacuum distillation. I got it.

Unsaturated polyester 41N resin A was mixed with dicyclopentaoxyethyl acrylate or dicyclopentaoxyethyl methacrylate as shown in Table 1, with manganese naphthenate toIi and 1.0m of tert-butyl perbenzoate as an il-forming agent. The curdling tendency of the mixed and cured product was measured.

The results are shown in Table 1.

In the table, ◯ indicates good results, △ indicates no practical problems but there are some problems, and × indicates problems.

For INK outside the cured product, resin composition 2? After coating and curing at 100°C for 5 hours, observe the wrinkles and glossy appearance of the surface.

The drying properties of metallic steel are determined by immersing the steel plate in a resin composition.

It was immediately taken out, and after 5 minutes, the steel was heated to 100° C., and the dryness of the composition on the steel surface was measured by touching it with all fingers.

The low-temperature flexibility test of vinyl chloride lead wire was conducted using a UL standard-compliant product with a length of 50 mm and a diameter of approximately 2 cm, as shown in Figure 1.
1015 (manufactured by Hitachi Cable Co., Ltd., vinyl chloride lead, I
) 1 were tied together with enameled wire 2 with a diameter of 0.29 wm, and this was immersed in the resin composition for 10 minutes, and after 415 minutes of residual dripping, it was cured at 120°C for 3 hours, and then placed in a low temperature bath at -10°C. After leaving it for 30 minutes, immediately bend the center part to a 90 degree angle to remove the 1. The number of cracks was measured.

After 415 minutes of dripping, it was cured at 120°C for 2 hours.

After the transformer cooled to room temperature (approximately 20°C), 120V was applied to the primary input terminal of the transformer.

TRANSFORMER, CHECK, ER, TC-5
522 (manufactured by TF Sub Control Loop Co., Ltd.) to measure the noise. The unit is expressed in acceleration K, and the larger the value, the louder the noise. Other characteristics are JIS, C
, 2105.9.

As is clear from the examples, unsaturated polyester resin,
5 to 100 parts of the compound represented by the formula (11)
By adding 30 parts by weight.

By reducing the inherent properties of the unsaturated polyester resin, the appearance of the cured face (wrinkles, gloss) is improved and the fit when energized is reduced, and the hardenability of the copper surface is also improved.

[Brief explanation of drawings]

Figure 1 is a schematic diagram showing the test method used in the test of low temperature flexibility of the conditioned vinyl lead wire conducted in the introductory example. JP-A-58-179214 (5)

Claims (1)

[Scope of Claims] 1. A resin composition comprising 100 parts by weight of an unsaturated polyester resin IIW and 5 to 30 parts by weight of a compound represented by the following formula (1). R1 is an alkylene group having 2 to 6 carbon atoms or an alkyleneheteroalkylene group having 4 to 6 carbon atoms + Rx is hydrogen or a methyl group.