SU794030A1 - Paint-varnish composition - Google Patents

Description

Aluminum bromide (50% solution in

ethanol) 0.1 to 1.5

Alcohol solution

ammonia (12.5%

solution in ethanol) 0.05-0.3

Organic

solventUntil 100.

To obtain a lacquer composition in an enamel based on glyptal resin. 0.50 wt.% melamine formaldehyde resin, 1.0 wt.% aluminum bromide (50% solution in ethanol), 0.15 wt.% alcohol solution of ammonia (12.5% in ethanol) are added, mixed thoroughly in within 2-3 minutes, diluted to a working viscosity of 20 seconds to

VZ-4 xylene and then defend 3-5 minutes Then the finished composition is poured into the enamelling tank in the automatic line. The drying mode of the enamelled condensers at a temperature of 150 ° C on an automatic line is as follows: T layer is 9 minutes at 130-155s, and the layer is 30 minutes at 140155 C.

The resulting composition can be stored for a long time at room temperature without being gelled.

Approximate compositions of the composition and physico-mechanical characteristics of paint coatings are given с.оtS responsibly in table 1 and 2-.

Table 1

PrimerPhisico-mechanical properties of the coating

0.55

3500

35 0.66 2340

45

50 2400 0.66

The test data on electrical strength, alcohol and benzene stability showed that the proposed composition with a 1% solution of aluminum bromide in ethanol containing 0.5% melamine formaldehyde resin (K 421-02 KB) and a 0.15% alcohol solution of amTable 2

50 50 50

1-2 1

one

The mica is significantly better than the melamine-alkyd resin-based composition under all other conditions being the same (temperature, cure time, aluminum bromide concentration). So the electrical strength of a known composition (GSH-165

silver) with a content of 1-3% is 133 kV / mm, and in the proposed composition with a 1% solution AIBrj, 0.5% resin K 421-02KV, 0.15% NHijjOH 260 KB / MM, T. e. 2 times higher, which is of great importance when using this composition as an electrically insulating one.

In addition, alcohol-benzostoyekt in a known composition (with AfBrj content of 1-3%) is 22-32 mn, in the proposed composition (1% AlBrj, 0.5% resin, 0.15%) is 240 minutes, which is 10 times better.

Claims (2)

Invention Formula Paint and varnish composition including alkyd resin, melamine formaldehyde resin, pigments, desiccant, organic solvent, alcohol solution of aluminum bromide, characterized in that, in order to improve the electrical insulation properties and alcohol-benzine-resistant coating, as an alkyd resin, it contains glyphthalic resin and, additionally, an ammonia alcohol solution in the following ratio of components, Bec.% t Gliftapeva resin 67, Melamine formaldehyde resin 0.3-3 Filler10,5-29,8 Pigments0,3-bd Drying 0.05-0.1 Ashyumini bromide (50% solution in ethanol) 0.1-1.5 Alcohol solution ammonia (12.5% dl 5 solution in ethanol) 0.05-0.3 Organic solventUntil 100. Sources of information taken into account in the examination of 0 1 Copyright Certificate of the USSR 532610, C 08.6 61/10, 1974. 2. Molotkova enamel ML-165, GOST 12034-66 (prototype).