Composition for pinocamphone (options)

 

The invention relates to epoxy compositions to obtain a casting pinakamaganda used to fill gaps, insulation and hardening of the open frame and chassis electrical connectors by fill, seal and protect items of electronic equipment, to align the defective surfaces of insulation, gluing of metals and non-metals with large alternating gaps. The objective of the invention is to provide a composition for preparing pinakamaganda with achievement of the technical result in the form of high compressive strength and isolation. The composition contains epoxy Dianova resin, triglycerol ether polyoxypropyleneamine, ethylenediaminetetra, foam controller and polyhydroxylated. According to the second variant, the composition contains epoxy Dianova resin, triglycerol ether polyoxypropyleneamine, foam controller and polyhydroxylated. To obtain pinakamaganda part hardener - ethylenediaminetetra was replaced by low molecular weight polyamide resin and aliphatic polyamine. 2 C. p. F.-ly, 3 tables.

The invention relates to epoxy compositions to obtain priming is s electrical connectors by pouring, for sealing and protection of items of electronic equipment, to align the defective surfaces of insulation, gluing of metals and non-metals with large alternating gaps.

Known composition to obtain a foam, comprising the epoxy compound is a mixture of oligodendrocyte and epoksidnouretanovye resin, aliphatic polyamine, polyhydroxylated and foam controller (see USSR author's certificate 854950, CL 08 J 9/02 from 05.07.79 year). However, the foam obtained on the basis of this composition has a low strength characteristics.

The closest in technical essence to the present invention is a composition (see USSR author's certificate 952890, CL 08 J 9/02, 08 L 63/00 from 20.03.81 g) comprising an epoxy compound, an aliphatic polyamine, polyhydroxylated and foam controller, as the epoxy compound contains a mixture of oligodendrocyte, epoxygenase and apocalypticism resins. However, the foam obtained on the basis of this composition, characterized by low values of adhesion strength at separation and compression strength, insufficient for filling foams that are used in units with high shock, vibration and compressive load, the milestone technical result in high compressive strength and isolation.

This problem is solved in that the composition for pinakamaganda, including epoxy compound, polyamine, polyhydroxylated and foam controller, in accordance with the invention contains as an epoxy epoxy compounds Dianova resin and triglycerol ether polyoxypropyleneamine, and as polyamine - ethylenediaminetetra, in the following ratio, wt.h.: Epoxy Dianova resin - 75-85 triglycerol ether polyoxypropylene - 24-14 Ethylenediaminetetra - 22-30 foam controller - 1-1,5 Polyhydroxylated - 2,5-3,5 This task is solved in that the composition for pinakamaganda, including epoxy compound, polyamine, polyhydroxylated and foam controller, in accordance with the invention contains as an epoxy epoxy compounds Dianova resin, triglycerol ether polyoxypropyleneamine, as polyamine - ethylenediaminetetra and aliphatic amines, and further comprises a low molecular weight polyamide resin in the following ratio, wt.h.: Epoxy Dianova resin - 75-85 triglycerol ether polyoxypropylene - 24-14 Ethylenediaminetetra - 8-12
Aliphatic amines - 4-6
Low molecular weight polyamide sleduyushim way.

In the first scenario
As the epoxy resin using a mixture of epoxy Dianova resin type ED-20 ED-16, ED-22 (GOST 10587-84) and triglycerol ether polyoxypropyleneamine marks Naproxin 703 (TU 2226-029-10488057-98) or Naproxe 603 (TU 2226-322-10488057-94), as polyamine - ethylenediaminetetra brand AF-2 (TU 2494-511-00203521-94). To achieve the required porous structure in the composition add foam controller brand silicone cap-2 "AND" (THE 6-02-813-73) or CEP-1 (TU 6-02-781-73) or brand Penta-483 (TU 2257-008-40245042-99) and the expander - polyhydroxy - liquid gidrofobiziruyuschey 136-41 (GOST 10834-76).

It was established experimentally that the combination of the required viscosity with rate of expansion leads to the formation of the porous structure with fine closed pores. The necessary strength and density are provided with adjustable number of pores (due to the optimum content of the foam controller, foamer), characteristics of oligomeric environment and activity hardener.

For experimental verification of the mechanical characteristics of the proposed composition for pinakamaganda cooked 3 recipes (see tab. 1) as follows.

Mixed sample of epoxy resins, Epoxides brands 603, 703, penile mix, fill in the form for the preparation of the corresponding samples.

Procompany in the first embodiment is different from the compound according to the second variant accelerated curing regime. The first is cured at a temperature of 20-25oC for 15-24 h and is characterized by a small value of viability (10-15 min).

The second option
As a binder using a mixture of epoxy Dianova resin type ED-20 ED-16 (GOST 10587-84) and triglycerol ether polyoxypropyleneamine marks Naproxin 603 (TU 2226-322-10488057-94), Naproxin 703 (TU 2226-029-10488057-98) as the curing agent is a low molecular weight polyamide resin grade IS 300 (TU 2224-092-05034239-96), the amine hardener M-4 (TU 2494-342-10488057-98) or hardener 620 (TU 2413-007-17411121-98), ethylenediaminetetra brand AF-2 (TU 2494-511-00203521-94). In the song add foam controller brand silicone cap-2 "AND" (THE 6-02-813-73) or CEP-1 (TU 6-02-781-73) or brand Penta-483 (TU 2257-008-40245042-99) and polyhydroxy - liquid gidrofobiziruyuschey 136-41 (GOST 10834-76).

Five formulations of the composition (see in table 4-8. 2) the proposed composition according to the second variant is prepared as follows.

Mix sample resin type ED-20, Epoxide 703, foam controller, to the mixture was hanging hardeners M-4, 620, AF-2, AT-300, AC is in for mechanical testing with the aim of experimental verification of physical and mechanical properties.

Procompany the second option is viable for at least 1 h and cures at a temperature of 20-25oWith in 48 hours

Determination of density according to OST 92-0903-78 and limit the compressive strength according to OST 92-1463-77 carried out on samples - cubes prepared as follows.

Composition for pinakamaganda pour into pre-greased with vaseline or grease metal open form with the internal cavity in the form of cubes with edge length 30,00.5 mm, filling it 2/3 of the height and utverjdayut at a temperature of 20-25oC.

Excess pinakamaganda cut by a hacksaw along the top edge of the form, to extract samples of pinocamphone, which determine the density and compressive strength.

To determine the tensile strength of the adhesive joints of aluminium alloy AMg6 at the margin OST 92-1476-78 boss of aluminum alloy with a diameter of 35 mm is subjected to a sandblasting treatment. Then double-degrease with acetone GOST 2768-84 or neprasam GOST 8505-80 and dried. The boss put on top of the strips of paper with a release coating and pour the prepared composition of pinakamaganda layer thickness of not less than 20 mm

After foaming and curing on the surface is at with glue VK-9. Utverjdayut at specific pressure of 0.05 MPa at a temperature of 20-25oC for 2 days. Then carry out tests at a temperature of 15-35oC.

The results of physical-mechanical tests of the formulations of the two proposed options pinakamaganda and prototype are presented in table. 3.

From table. 3 shows a positive technical result: on the mechanical characteristics of the proposed composition according to the first and second variants of the order exceeds the prototype of the ultimate strength in compression and almost twice the strength at the margin.

Therefore, caulking compounds according to the invention, it is expedient to apply in units of equipment experiencing high vibration, impact and compressive loads.


Claims

1. Composition for pinakamaganda, including epoxy compound, polyamine, polyhydroxylated, foam controller, characterized in that it contains as epoxy epoxy compounds Dianova resin, triglycerol ether polyoxypropyleneamine, and as polyamine-ethylenediaminetetra in the following ratio, wt.h.:

Epoxy Dianova resin 75-85

Triglycerol ether poly is p>2. Composition for pinakamaganda, including epoxy compound, polyamine, polyhydroxylated, foam controller, characterized in that it contains as epoxy epoxy compounds Dianova resin and triglycerol ether polyoxypropyleneamine, and as polyamine - ethylenediaminetetra and aliphatic amines, and optionally contains nizkomolekulyarnoe polyamide resin in the following ratio, wt.h.:

Epoxy Dianova resin 75-85

Triglycerol ether polyoxypropyleneamine 24-14

Ethylenediaminetetra 8-12

Aliphatic amines 4-6

Nizkomolekularnah polyamide resin 18-24

Foam controller 1-1,5

Polyhydroxylated 1,5-2,5

 

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