SU666189A1 - Thermoplastic polymer base coating composition - Google Patents

Description

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The invention relates to the field of composite materials based on polymers, which are used to protect metals, imparting antifriction, sealing, electrical insulation, decorative and other properties to metal products,

Composite materials are known that consist of polymeric binder and fine inorganic fillers, which increase the adhesion of the compositions, act as builders, reduce the permeability of the adhesives, and improve the physicomechanical properties of the materials. The most effective fillers are metals: A1, Zn, Pb, Mo, steel 1,

and their oxides 2.

The industrial production of such fillers requires expensive equipment, significant energy and labor costs, with the expense of de | shield materials. Therefore, the technological process of obtaining metal-filled polymer compositions becomes much more complicated, their cost increases and the economically viable range of application is reduced.

The prototype of the proposed composition is a composition based on a thermoplastic polymer — polyethylene, containing 1.5-2 wt.% Zinc oxide as a filler. However, zinc oxide is a scarce, expensive product used in many industries.

The aim of the invention is to reduce the cost of the composition while retaining its adhesion to metals and protective ability.

For this, a composition based on a thermoplastic polymer contains non-ferrous fuming oxides as a filler - a by-product of svitel-zinc production, including oxides, wt.%: Zinc 56-58, lead 15-17 antimony 0.18-0.26, Mass 1.1-1.5, iron 0.1-0.2, chlorine 0.14-0.88 and shlak the rest with the following ratio of components of the composition, wt%: thermoplastic polymer 60-90; fumingos 10-40.

The specified ipolitel - topodiznodny anhydrous powder of light gray color, has the following characteristic:

average particle size µm2,28

specific surface, g / m5180

porosity,% 72.7

bulk weight,, 96

density, 08

content of water-soluble salts,% 2.3

water-neutral reaction

residue after wet sieving:

on the sieve with mesh N 0056K,% 4.75

on the sieve with mesh N 0016K,% 1.0.

To obtain coatings, mixtures based on thermoplastic binders of various nature, differing in the content of fuming oxides, were prepared. Coatings with a thickness of 200 µm on metal (steel and aluminum) substrates were formed by hot pressing at a temperature of 200 ° C under a pressure of 50 kg / cm for 1 minute. Data on the properties of the coatings are given in table. 1, is confirmed by the test certificate attached to this application.

As can be seen from the table. 1, the adhesion and protective properties of the compositions are significantly better than those of non-injected thermoplastics, and are at the level of the characteristics of known plastics containing

dispersed metals. The optimum content of fuming oxides depends on the nature of the polymer binder and is 10-40%. With a subsequent increase in the degree of filling, the performance of the compositions deteriorates.

In tab. 2 shows the main physico-mechanical properties of the compositions of the optimal composition in comparison with the prototype,

The introduction of fuming oxides increases the electrical conductivity of the compositions and contributes to protection against radiation, radio interference and coronary discharges. The use of the proposed materials makes it possible to use hfomshshennye waste, reduces the cost of polymer compositions (the cost of fuming oxides is 200-300 rubles / ton.). The processing technology of the proposed composition is not comparable to that of existing plastics.

Table 1 Elasticity, GOST 5628-51 mmpress type E 4.0 Mikrotver-Mikrotver- 9.7-10.1 9.8-10.4 reach, kg / mm domer MPT-3 Limit other-GOST 1126-62, 1 , 6-2.5 2.0-3.1 nosgs in contrast. stretching machine. kg / mm

Vodopogloshe- GOST 4650-65, 0.01 ing,% analytic. Libra

ADV-200 4.0

0,010,010,015B distilled water 24 hours at 20 ° C 3.53.8 Also 16.3-22.0 Also 7.2-21.0 4.5-5.5 Film thickness 4.8-5.6 200 microns

Claims (2)

Claims of a composition for a coating of a tercuplastic polymer containing metal oxides as a material, characterized in that in order to reduce the cost of the composition while preserving its adhesion to metals and strength, it contains non-ferrous metal oxime - a byproduct of svishuvo-zinc production. 7666189 8 including oxides, wt.%: zinc 56-58, evin-Sources of information, taken in vnnma "8 15-17, antimony 0.18-0.26, 1.1-1.5, in the examination iron 0.1-0.2, chlorine 0.14-0.88 and slag else- 1. British patent FT 1205394, cl. C3R. mine, with the following components1970. composition, wt.%: 5 2. USSR author's certificate G 327687, thermoplastic oolimer 60-903. Dvtrtstsoe certificate of the USSR N 368279, fuming oxides 10-40 "l. C 08 L 23/06, 1969. Kl., 1969.