Insulation compound preparation method

FIELD: insulation materials.

SUBSTANCE: method of preparing insulation compound, which can be used for impregnating and pouring high- and low-voltage components of electrical and radio equipment, transformers, and throttle valves, comprises mixing at temperature 50-60°C resin having molecular weight 1000-6000 with phosphorus-containing modifier, in particular triglycidyl phosphate or diglycidyl methyl phosphate, or diglycidyl methyl phosphonate, after which is added stoichiometric amount of hardener, in particular 4,4'-diaminodiphenylmethane or 4,4'-diaminodiphenyl sulfone, or 4,4'-diaminodiphenyl oxide.

EFFECT: reduced viscosity of compound, enhanced insulation and electric-strength properties, and simplified preparation procedure.

2 tbl, 17 ex

 

The invention relates to a method for insulating self-extinguishing epoxy compound designed to seal and fill the high-voltage and low-voltage elements of electrical and radio equipment, transformers, chokes.

A method of obtaining electrical insulating self-extinguishing epoxy compound by combining a first component comprising 30-54 parts by weight of fine hydrate of aluminum oxide, mixed and thoroughly stirred at 50°With 15-25 parts by weight of the condensation product of tetrabromdifenilolpropan with epichlorohydrin, molten at (9010)°C, 35-45 parts by weight of epoxy Dianova resin ED-16, 15-25 parts by weight of the condensation product of dicarboxylic oligodendrogliopathy with epoxy Dianova resin and 15-25 parts by weight of product dehydrochlorination of epichlorohydrin with water, with the stoichiometric quantity of the second component, comprising 35-55 parts by weight of ISO-methyltetrahydrophthalic anhydride and 0.05-0.25 parts by weight of 2,4,6-Tris(dimethylaminomethyl)phenol [U.S. Pat. 2099368 USA, MCI608 L 63/02, N 01 3/40. The method of obtaining electrical insulating impregnating and casting self-extinguishing compound / Vmesto, V.M.Fomin, Lgota, Nursaparova (RF). - N 93009433/04; Statements. 18.02.93; Publ. 20.12.97; bull. N 35].

The disadvantages of this composition is the presence of tetrabromdifenilolpropan capable of the ri temperature decomposition of toxic and korrozionnostojkie brominated substances (including hydrogen bromide), a large number of components, the complexity of preparation.

Known modified epoxy compound insulating destination obtained by combining and mixing the components in the following ratio (parts by weight): epoxy Dianova resin ED-20 (100), the curing agent is a low molecular weight polyamide brand-300 (30), modifier - dibutyltindilaurate containing polybutylmethacrylate (30) [U.S. Pat. 2131895 RF, MKI608 L 63/02, 77/08, 33/12, From 09 To 3/10, From 08 To 5/521. The modified epoxy compound insulating destination / Searchamerica, Lgeepa, Evelia, Ubiquinone, Gdemaria, Abomasnow (RF). - N 97120351/04; Statements. 05.12.97; Publ. 20.06.99]. The disadvantage of this compound is the use of directionspanel modifier, which during operation can diffuse and be removed from the coating composition, which leads to deterioration of properties. In addition, the composition has insufficient electrical resistance, dielectric strength, flame resistance, high mass loss during combustion, low strength characteristics.

The closest in technical essence is an epoxy casting compound [U.S. Pat. 2199561 RF, MPK708 L 63/02, From 08 To 13/02, From 09 To 21/14. Epoxy potting compound / Nasareema, Heptarchia, law-enforcement activities, Gmodelo, Tkhorikov (RF). - N 2000106223/04; Statements. 13.03.2000; Publ. 27.02.2003], we obtain the th mixture of epoxy Dianova resin ED-20 molecular weight 390-430, heated to 60-80C, with fine aluminum hydroxide and molten pentabromodiphenylether, followed by the introduction of trichloropropane and the antifoam PGCO-1001 and curing the mixture for 3-5 h at 60-80C in vacuum with stirring. In the ready the basis of introducing tetraethoxysilane and Epoxide C-1281, mix, and then vacuum at a residual pressure of 10-15 mm Hg at 60°C for 40-60 minutes In the mixture enter the estimated amount of the molten mixture of isomers of diaminodiphenylmethane and utverjdayut.

The disadvantages of this composition is the presence of chlorine and bromodomain compounds, the decomposition temperature toxic and korrozionnostojkie substances (including chloride and hydrogen bromide), a large number of components, complexity and duration of cooking, use of phosphate directionspanel modifier, which during operation can diffuse and be removed from the coating composition, which leads to deterioration of properties. In addition, the composition has a high viscosity, insufficient electrical resistance, dielectric strength, resistance to fire.

The present invention aims to increase the electrical resistance and durability, fire resistance compound, reducing the viscosity of the composition, simplification with the person making the song and its composition, including by eliminating chlorine and bromodomain connections.

The technical result is achieved in that in a method of producing insulating compound by mixing while heating epoxygenase resins and phosphorus-containing modifier followed by the addition of stoichiometric amounts of aromatic amine hardener, as phosphate modifier use of phosphate glycidyloxy ether selected from the group triglycerol, diglycidylether, diglycidylether, 100 wt. hours which are mixed at a temperature of 50-60°With 45-55 parts by weight of epoxygenase resin of molecular weight of 1000-6000 mm., as a hardener used 4,4'-diaminodiphenylmethane, or 4,4'-diaminodiphenylsulfone, or 4,4'-diaminodiphenylamine.

As epoxygenase resin took resins e-45 (AC 8%, 1070 MM), e-41 (EC 7.5%, 1150 MM), e-20 (AC 5.1%, 1680 MM), e-30 (EC 3.5%, 2460 MM), e-P (AC 2.5%, 3740 MM), e-49 (EC 1.5%, MM 5730).

As phosphorus-containing pilgramage ether took: triglycerol (EC 48%), diglycidylether (EC 38%), diglycidylether (EC 41%). Glycidyloxy esters of phosphorus acids (GEF) is a colorless low viscosity liquid, synthesized by the method of [Rizpolozhensky NI Synthesis and properties glycidyloxy of some esters of phosphorus acids / Niespyjnosci, Masv the roar, Lowseason // In Coll.: The chemistry of the body connect. phosphorus. - L.: Nauka, 1967. -S-213.].

As aromatic amine hardeners used 4,4'-diaminodiphenylmethane (DADPM) (1.15), 4,4'-diaminodiphenylsulfone (DADPS) (1.44), 4,4'-diaminodiphenylamine (DDFO) (1.16). Aromatic amines are solids with melting 93° (DDPM), 177C (DDFS), 190C (DADT).

Compositions were prepared as follows. To 100 parts by weight of the GEF at a temperature of 50-60C was added 45-55 parts by weight of epoxygenase resin and thoroughly mixed. In the resulting composition before use at a temperature of 50-60C was injected estimated number of hardener and thoroughly stirred until complete dissolution. After casting or impregnation composition was utverjdali in a stepwise temperature-time mode, depending on the type of hardener: DDPM - 50°3 h, 70°C-2 h, 100°C-2 h, 130°s-1 h, 150°s-1 h 170°3 h; for DADPS - 70°3 h, 100°2 h, 130°s-1 h, 150°s-1 h 170°3 h; for DADT - 60°3 h, 70°C-2 h, 100°C-2 h, 130°s-1 h, 150°s-1 h 170°-3 hours

Compositions and modes of curing the examples given in table. 1. The properties of the compounds are given in table. 2.

From the presented data in table 2 it is seen that the present invention in comparison with the prototype has a large electric resistance and toughness, so the resistance lower viscosity. Unlike used in the prototype chemically inactive trichloropropane proposed phosphorus-containing modifier (GEF) chemically crosslinks in the polymer grid that prevents its diffusion. In addition, the proposed method for the preparation of compound simpler and the composition does not contain chlorine and bromodomain connections.

The method of obtaining electrical insulating compound by mixing while heating epoxygenase resins and phosphorus-containing modifier followed by the addition of stoichiometric amounts of aromatic amine curing agent, characterized in that as the phosphorus-containing modifier use of phosphate glycidyloxy ether selected from the group triglycerol, diglycidylether, diglycidylether, 100 parts by weight of which are mixed at a temperature of 50-60°With 45-55 parts by weight of epoxygenase resin of molecular weight of 1000-6000 mm., as a hardener used 4,4'-diaminodiphenylmethane, or 4,4'-diaminodiphenylsulfone, or 4,4'-diaminodiphenylamine.



 

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