RU2627401C1 - Polymeric composition for high-frequency energy absorbtion - Google Patents

Abstract

FIELD: chemistry.

SUBSTANCE: polymer composition for high-frequency energy absorption includes, mass parts: low-molecular synthetic dimethylsiloxane SKTN A grade 15-25, the iron carbonyl radio engineering R-10 105-175, cold curing catalyst No. 1 1.2-1.8, ethyl silicate-40 1.5-2.5, oleinic acid 0.5-0.9.

EFFECT: increase of vitality and elasticity, higher microwave signal wave attenuation.

2 tbl, 3 ex

Description

The invention relates to electronic equipment, in particular to the production of polymer compositions designed to absorb high-frequency energy in microwave devices.

Known polymer composition for absorbing high-frequency energy (RU 2349615 C1, publ. March 20, 2009, IPC C08L 83/04), containing synthetic rubber, low molecular weight dimethylsiloxane SKTN, cold curing catalyst No. 68, carbonyl iron grade R-10 in the following ratio of components wt.h .:

Synthetic rubber, low molecular weight dimethylsiloxane 15-25 Iron carbonyl R-10 78-83 No. 68 Cold Curing Catalyst 0.6-1.0

The closest in technical essence to the proposed polymer composition for absorbing high-frequency energy is a polymer composition for absorbing high-frequency energy (RU 2497851 C1, publ. 10.11.2013, IPC C08L 83/04) containing a polymer - synthetic rubber low molecular weight dimethylsiloxane SKTN, catalyst - cold curing catalyst No. 68, as the absorbing filler - iron carbonyl radio engineering grade R-10 and ethyl silicate-40 in the following ratio of components, parts by weight:

Synthetic rubber, low molecular weight dimethylsiloxane 15-25 Iron carbonyl radio engineering R-10 105-175 No. 68 Cold Curing Catalyst 1.5-2.5 Ethyl silicate 1.5-2.5

The disadvantages of the known compositions are the low efficiency of the attenuation of the microwave signal wave and insufficient elasticity.

The technical result of the proposed solution is to increase the attenuation of the microwave signal wave, increasing vitality and elasticity.

The essence of the inventive polymer composition for absorbing high-frequency energy is that it contains a polymer - synthetic rubber, low molecular weight dimethylsiloxane SKTN, the catalyst is a cold curing catalyst, and R-10 brand carbonyl carbonyl radio engineering and ethyl silicate-40 are absorbing filler.

New in the invention is the catalyst No. 1, which is a solution of organotin compounds in the esters of orthosilicic acid, and oleic acid in the following ratio, wt.h .:

Synthetic rubber, low molecular weight dimethylsiloxane SKTN grade A (TU 2294-002-00152000-96) 15-25 Iron carbonyl radio engineering R-10 (GOST 13610-79) 105-175 Cold curing catalyst No. 1 (TU 6-02-1-011-89) 1.2-1.8 Ethyl silicate-40 (GOST 26371-81) 1.5-2.5 Oleic acid (TU 6-09-08-2003-88) 0.5-0.9

The composition is prepared by simply mixing the components and curing at room temperature.

Table 1 shows the compositions of the proposed composition for the absorption of high-frequency energy.

The specified range of components is selected due to the fact that with a decrease in the amount of iron powder of carbonyl radio-technical P-10, the absorption of spurious radiation in a closed volume decreases, and with an increase in the amount of iron powder of carbonyl radio-technical P-10, the inventive composition increases its viscosity and heterogeneity.

With an increase in the cold cure catalyst No. 1, the viability of the composition is reduced, while a decrease in the cold cure catalyst No. 1 does not completely cure the composition.

With a decrease in oleic acid, the composition is tough, with an increase it has a long-term curing.

Table 2 shows the results of comparative tests of the prototype and the inventive polymer composition for the absorption of high-frequency energy.

As can be seen from the data shown in table 2, the proposed polymer composition for absorbing high-frequency energy has several advantages:

- higher attenuation of the microwave signal wave (-14 dB versus -10 dB);

- greater vitality (31-33 min vs 15 min);

- greater elasticity (elongation of 80% against 60%, shore hardness 53 against 67).

Claims (2)

A polymer composition for absorbing high-frequency energy, containing polymer - synthetic rubber, low molecular weight dimethylsiloxane SKTN, as an absorbing filler - iron carbonyl radio engineering grade R-10, the catalyst is a cold curing catalyst and ethyl silicate-40, characterized in that it contains a catalyst as a cold curing cold curing No. 1 and additionally contains oleic acid in the following ratio, wt.h .: Synthetic rubber, low molecular weight dimethylsiloxane SKTN brand A 15-25 Iron carbonyl radio engineering R-10 105-175 No. 1 Cold Curing Catalyst 1.2-1.8 Ethyl silicate-40 1.5-2.5 Oleic acid 0.5-0.9