Electrical embedment compound

FIELD: electricity.

SUBSTANCE: invention is attributed to the field of electric engineering specifically to epoxide thin filling compounds used for electric insulating and reinforcing by means of embedding of high-voltage power supply units, transformers, electric circuitry, uncased and cased electric couplers, for sealing and protecting elements of radio-electronic devices against moisture and mechanical impacts. Composition for filling compound with moderate initial viscosity contains 30-36 wt-p. of epoxide diane resin, 12-20 wt-p. of threeglycid polyoxypropylene triol ether, 10-12 wt-p. of monoglycid n-butanol ether, 18-22 mass-p. of low-polymeric polyamid resin and 7-10 wt-p. of aliphatic amine.

EFFECT: creation of electric insulating filling compound composition keeping resiliency not less than for an hour, having high specific volume, high value of surface electric resistance and increased elasticity.

1 tbl

 

The invention relates to low viscosity epoxy casting the compounds used for elektrosokirani and hardening by pouring high-voltage power supplies, transformers, electrical installation, open frame and chassis electrical connectors, for sealing and protection of items of electronic equipment from moisture and mechanical damage.

Known epoxy casting resins based on epoxy Dianova resin active diluent resin deg-1 (diglycidylether ether of diethylene glycol), polyamide resin L-20 and the mineral fillers used to fill electric connectors, inputs (OST 92-1006-77). However, these compounds are highly viscous systems, when filling which requires preheating and degassing, providing a leak-proof insulation with minimal porosity.

Similar in composition to the proposed filling material is a compound according to the author's certificate of the USSR 678537, CL N 01 3/18, 1979, containing epoxy Dianova resin active diluent pack-616, a filler and an amine hardener. However, the compound obtained on the basis of this composition, has a number of disadvantages: low vitality, low specific volume and surface electrical resistance.

Task data is th invention is to provide electrically insulating casting compound with a viability of at least 1 hour, high specific volume and surface electric resistance.

Get the technical result consists in increasing the elasticity of the compound (relative elongation tensile) and possibilities of its application in products with high vibration and shock loads.

This task is solved in that the electrically insulating casting compound comprising epoxy Dianova resin, a hardener of amine type, an active diluent contains two active diluent: triglyceridemia ether polyoxypropyleneamine and monoglycidyl ether n-butanol, as a hardener of amine type - a mixture of aliphatic amine and a low molecular weight polyamide resin in the following ratio of components, parts by weight:

epoxy Dianova resin30-36
triglycerol ether polyoxypropyleneamine12-20
monoglycidyl ether n-butanol10-12
low molecular weight polyamide resin18-22
aliphatic amine7-10

Compositions for the proposed compound was prepared as follows. As the epoxy resins used a mixture of epoxy Dianova resin ED-20 or ED-22 (GOST 10587-93), triglycidyl what about the air polyoxypropyleneamine brand Naproxin 603 (TU 2226-322-10488057-94) and monoglycidyl ether n-butanol brand Naproxin B (according to the technical requirements of NPP at macromer)[1]. As the hardener used low molecular weight polyamide resin grade IS 300 (TU 2224-092-05034239-96) and hardener amine is an aliphatic amine M-4 (TU 2494-342-10488057-98).

For the experimental characterization of the proposed compound was prepared 4 composition (see table) as follows. Mixed sample epoxy Dianova resin, Epoxides brands 603, 201, added hardeners M-4 and 300, are thoroughly mixed, measured the viability of the compositions at a temperature of 18÷25°mass ˜100 g of the Prepared compound was poured into the forms processed by the lubricant, to sample discs (diameter 20 mm, thickness ˜2 mm) for measurement of the dielectric characteristics and samples shovels for tensile tests.

Volume resistivity (ρv) and surface resistance (ρs) solidified samples of potting compound was determined in accordance with GOST 6433.2. Electric strength (EAve) was measured using the apparatus aim-80 at frequency of 50 Hz.

Elongation at tensile strength was determined on samples blades of a thickness of ˜2 mm according to GOST 14236-81.

The compositions and test results of the 4 formulations of the proposed compound and the prototype presented in the table.

The table shows a positive technical result is, since the proposed compound:

- has more viability (not less than 1 h)than the prototype (0.5 h);

more than 2-3 orders of magnitude superior to the prototype on the specific volume and the surface electrical resistance;

- has a high elasticity elongation at tensile strength of not less than 10%.

Due to the increased elasticity of the molding compound according to the invention are useful for the insulation of electrical connectors, sensors, controls elektroradioapparaturi, chips in products that are experiencing high vibration and shock.

Table
The compositions, properties offer insulating casting compound solution at a temperature of (20÷5)°
ExamplesComposition, parts by weightViability, minVolume resistivity ρv, Om·mThe surface electrical resistance ρsOhmsElongation at elongation, %
1ED-22 - 30; Naproxin 603 - 18; Naproxin 201 -12; 300 - 18; aliphatic amine - 10;606,0·10133·1014/td> 15,0
2ED-20 - 30; Naproxin 603 - 18; Naproxin 201 - 12; 300 - 20; aliphatic amine - 8;1202,2·10137,0·101424,0
3ED-22 - 30; Naproxin 603 - 20; aliphatic amine - 9; 300 - 18902,0·10135,0·101418,0
4ED-22 - 36; Naproxin 603 - 12; Naproxin 201 - 12; 300 - 22; aliphatic amine - 7;601,0·10133,0·101310,0
The placeholderEpoxy Dianova resin - 100; Active diluent pack 616 - 20; Polyethylenepolyamine - 10-14; Filler: mica - 19, talc - 9; chromium oxide - 2304·10107,0·10110

Literature used

1. Potochkin I.I., Korotkova N, Tarasov V.N., Lebedev V.S. Modifiers for epoxy resins production NPP at macromer // Adhesives. Sealants. Technology. - 2006 - No. 7. - P.14-17.

Insulating casting compound comprising epoxy Dianova resin, a hardener of amine type, an active diluent, characterized in that it contains two active diluent: triglyceridemia ether polyoxypropyleneamine and monoglycidyl the th ether n-butanol, as a hardener of amine type - a mixture of aliphatic amine and a low molecular weight polyamide resin in the following ratio of components, parts by weight:

epoxy Dianova resin30-36
triglycerol ether polyoxypropyleneamine12-20
monoglycidyl ether n-butanol10-12
low molecular weight polyamide resin18-22
aliphatic amine7-10



 

Same patents:

Insulating material // 2284593

FIELD: electrical engineering.

SUBSTANCE: proposed insulating material that can be effectively used to insulate conductors for various industries, including radio engineering, cable industry, microelectronics, and the like, has multilayer structure of N thin-film layers, where N > 1; all layers are made of separate piled films produced from same material and by same method, having actually equal thickness d < 25 μm.

EFFECT: facilitated manufacture, reduced cost of materials used, enhanced electric and mechanical strength.

1 cl, 1 dwg, 2 tbl

FIELD: marking materials.

SUBSTANCE: invention relates to pigmentation and compositions for use in laser marking, in particular UV absorbing pigment at least partly covered with synergist having general formula [Rm(SiOn)]pR'q wherein m=1-3, n=1-3, p is a number equal to at least 1, q=0-3, and at least one of R or R' represents substituent. When pyrolized, pigment forms black material appropriate to form label. Such pigments are suitable for fluoropolymers serving to insulate wire conductors and cables.

EFFECT: expanded marking possibilities.

20 cl, 6 tbl, 38 ex

FIELD: electronic engineering; gas panel manufacture.

SUBSTANCE: protective coating that can be used for manufacturing contact members of gas-panel strip conductors is formed on both sides of polyamide and applied by stenciling method using for the purpose dielectric composition resistant to 20-30% alkali solutions at temperature of 65 - 85oC that incorporates in its composition ethyl cellulose in the amount of maximum 9 parts by weight and organic solvent in the amount of minimum 91 parts by weight with boiling temperature of ≥ 190oC, minimal amount of ethyl cellulose and maximal amount of organic solvent being, respectively, 7.5 and 92.5 parts by weight.

EFFECT: improved rheological and protective properties of coating using proposed composition.

1 cl, 1 ex

The invention relates to the field of electrical insulating equipment, in particular the silicone composition used in the electrical industry for the production of insulating materials and for impregnation of windings of electrical machines and apparatus

The invention relates to the field of electrical engineering, in particular to compositions based on ethylene-propylene rubber, used as maguilera placeholder in electric cables and wires

The invention relates to the field of electrical engineering, in particular to compositions for the manufacture of coatings for electrical steels for magnetic circuits of electrical machines and apparatus

The invention relates to the production of insulating coatings on electrical steel used in the magnetic circuits of electrical machines, apparatus and instruments

The invention relates to electrical engineering, in particular compositions for the manufacture of coatings for electrical steels for magnetic circuits of electrical machines and apparatus
The invention relates to electronic devices and can be used in the manufacture of gas discharge display panels

FIELD: chemistry.

SUBSTANCE: invention concerns process of heatproof binder production for permeation of glass-cloth filler used in production of chimney vent shafts, offtake collector pipes for hot aggressive gas etc. The process involves stirring of basic resin - epoxy novolac heated to 80-100°C beforehand - in acetic-alcohol-toluene solvent for up to 12 hours. For at least 3 hours at 30-50°C phenol formaldehyde novolac with particle size of 2-3 cm is added to the obtained solution and stirred. Further promoting 2,4,6-tris/dimethylamino/methyl/phenol or diethylaminomethylethoxysilane is introduced and stirred continuously for at least 20 minutes. Obtained binder of given density is filtered.

EFFECT: obtaining a binder with excellent thermophysical properties and good technological cost-effective processing parametres.

3 cl, 2 tbl, ex, dwg

The invention relates to the field of creation of high-strength composite materials on the basis of fibrous fillers and epoxy resins, which can be used in machine building, shipbuilding, aviation industry and other fields

The rubber mixture // 2125066

The invention relates to compositions based on polyvinyl chloride for injection molding and can be used as the plastic for making bottom shoes

The invention relates to anti-friction composition based on PTFE, of a complex of thermosetting resin and filler, and can be used in the manufacture of high-loaded friction units of machines and mechanisms, having a low coefficient of friction and operating at elevated temperatures

The invention relates to composite materials based on phenol-formaldehyde polymers, in which the curing agent is used hexamethylenetetramine (GMHA), and in particular can be used for abrasive tools made both the cold and hot pressing

FIELD: chemistry.

SUBSTANCE: invention concerns process of heatproof binder production for permeation of glass-cloth filler used in production of chimney vent shafts, offtake collector pipes for hot aggressive gas etc. The process involves stirring of basic resin - epoxy novolac heated to 80-100°C beforehand - in acetic-alcohol-toluene solvent for up to 12 hours. For at least 3 hours at 30-50°C phenol formaldehyde novolac with particle size of 2-3 cm is added to the obtained solution and stirred. Further promoting 2,4,6-tris/dimethylamino/methyl/phenol or diethylaminomethylethoxysilane is introduced and stirred continuously for at least 20 minutes. Obtained binder of given density is filtered.

EFFECT: obtaining a binder with excellent thermophysical properties and good technological cost-effective processing parametres.

3 cl, 2 tbl, ex, dwg

FIELD: electricity.

SUBSTANCE: invention is attributed to the field of electric engineering specifically to epoxide thin filling compounds used for electric insulating and reinforcing by means of embedding of high-voltage power supply units, transformers, electric circuitry, uncased and cased electric couplers, for sealing and protecting elements of radio-electronic devices against moisture and mechanical impacts. Composition for filling compound with moderate initial viscosity contains 30-36 wt-p. of epoxide diane resin, 12-20 wt-p. of threeglycid polyoxypropylene triol ether, 10-12 wt-p. of monoglycid n-butanol ether, 18-22 mass-p. of low-polymeric polyamid resin and 7-10 wt-p. of aliphatic amine.

EFFECT: creation of electric insulating filling compound composition keeping resiliency not less than for an hour, having high specific volume, high value of surface electric resistance and increased elasticity.

1 tbl

FIELD: production processes.

SUBSTANCE: blemished surface is covered with polyester resins Derakane 8084 as primer coat, after drying surface is covered with at least two layers of powder-bonded glass-fiber mat and three layers of surface film as reinforcing layer, these layers are resinated by Derakane 411-350, rolled, after drying protecting cover as wax top coat based on isophthalic polyester is applied.

EFFECT: improvement of coating service life.

3 cl, 1 dwg

FIELD: chemistry.

SUBSTANCE: composition contains a homogeneous mixture consisting of at least one bromine-functionalised epoxy resin, at least one epoxy curing agent and at least one pigment, filler and/or coating additive. Content of bromine in the bromine-functionalised epoxy resin is equal to 5-60%. The composition also contains alkanol amine and at least one zinc borate compound. Alkanol amine is selected from a group consisting of diethanol amine and tris(hydroxymethyl)aminomethane. The method of preparing the composition involves mixing components, heating to melting point of the mixture, extrusion of the molten mixture, cooling, crushing and grinding to powder. The composition provides a coating with high glass transition temperature and acceptable flexibility when depositing the coating onto a metallic or plastic base, in particular metallic and plastic pipes.

EFFECT: coatings can have high adhesion in hot and humid conditions and optimum short-term and long-term protection from cathodic disbonding at high temperature and humidity.

14 cl, 3 tbl, 7 ex

FIELD: chemistry.

SUBSTANCE: binder for preparing prepregs is a product of reacting polyamide acid and an epoxy-novolac oligomer with the following ratio of components in wt %: polyamide acid 1-20, epoxy-novolac oligomer - the rest. The invention also discloses a method of preparing the said binder and a prepreg from the said binder.

EFFECT: invention enables to obtain a product with homogeneous phase distribution of the polyimide component.

10 cl, 5 dwg, 2 tbl, 6 ex

Up!