SU670592A1 - Electroinsulation prepreg - Google Patents

Description

T a b l II c a 1

The expected technical effect is an increase in the energy performance and reliability of the machines and equipment when using the invention.

The economic effect is more than 5,000 rubles per ton of material used by the consumer.

Example 2. A layered composition consisting of a layer of glass fabric, a layer of polyethylene terephthalate film and a layer of mica paper is impregnated with a compound (viscosity 30–200 s according to VZ-4) until saturation.

Excess compound is removed with a scraper device. From the material obtained, a bag is assembled (20 layers) and pressed at a specific pressure of 5-10 kg / cm and a temperature of 150 ° C for 30 minutes.

The obtained samples are subjected to heat treatment in air for 24 hours at a temperature of 150 ° C.

After normalization at room temperature for 24 hours, the tests were carried out.

The composition and material properties are given in table. 2

table 2

Example 3. A layered composition consisting of a layer of glass mesh, a layer of ethylene terephthalate film and a layer of mica paper is impregnated with a compound (viscosity 30-200 s3 OZ-4) to saturation.

Excess compound is removed with a scraper device. From the material obtained, a bag is collected (20 layers) and pressed at

Example 4. A layered composition consisting of a layer of glass cloth, a layer of glass mesh and a layer of micronitized paper is impregnated with a compound (viscosity 30–200 s for BZ-4) until saturation.

Excess compound is removed with a scraper device. From the material obtained, a bag is assembled (20 layers) and pressed at a specific pressure of 5-10 kg / cm and a temperature of 150 ° C for 30 minutes.

The obtained samples are subjected to heat treatment in air for 24 hours at a temperature of 150 ° C.

After normalization at room temperature for 24 hours, tests are performed.

The composition and material properties are given in table. four.

Example 5. A layered composition consisting of a layer of heat-resistant paper, a layer of polyethylene terephthalate film and a layer of mica paper is impregnated with a compound (viscosity 30-200 s by OT-4) to saturation.

specific pressure 5-10 kgf / cm and a temperature of 150 ° C for 30 minutes.

The obtained samples are subjected to heat treatment in air for 24 hours at a temperature of 150 ° C. After normalization at room temperature for 24 hours, the tests were carried out.

The composition and material properties are given in table. 3

Table 3

Excess compound is removed with a scraper device. From the material obtained, a bag is assembled (20 layers) and pressed at a specific pressure of 5-10 kg / cm and a temperature of 150 ° C for 30 minutes.

The obtained samples are subjected to heat treatment in air for 24 hours at a temperature of 150 ° C. After normalization at room temperature for 24 hours, the tests were carried out.

The composition and material properties are given in table. five.

Example 6. A layered composition consisting of a layer of polyethylene terephthalate rubber and a layer of micronite paper is simulated with a compound (viscosity 30-200 s by OT-4) until saturation.

Excess compound is removed with a scarlet device. From ioluchennogo material recruit package (20 layers) and pressed at

specific pressure of 5-10 kg / cm and a temperature of 150 ° C for 30 minutes.

The composition of the composition and material properties are given in table. 6

Table 4

T a b l 11 c a 5

Claims (1)

Invention Formula An electrically insulating prepreg based on mica paper, fiberglass and / or other substrates and a binder containing epoxy resin, oligomethyl acrylate, anhydrite hardener and peroxide-type initiator, characterized in that As an anhydride hardener, isomethyl tetrahydrophthalic anhydride and additionally carboxylated low molecular weight nitrile-based butadiene nitrile rubber with 10-26% nitrite. Table 6 groups at the following ratio of components, weight. %: Epoxy Dianova Resin 8-18 Oligoether acrylate7-17 Isomethyltetrahydrophthalic anhydride 5-II The initiator of peroxide type 0,03-0,1 Kauchuk0,3-5 Slyudinit paper20-40 Fiberglass and / or friend substrate Else Sources of information taken into account in the examination 1. USSR author's certificate № 170649, cl. C 08L 63/02, 1964.