SU751818A1 - Polymeric composition - Google Patents

Description

one

The invention relates to the field of self-extinguishing compositions on a polypylep-based basis and can be used in the radio and electrical industry .5

The flame retardant composition of thermoplastic materials with chloroparaff, antimony trioxide and co-hexachloro-l-xplol 1 as an additive is known.

A disadvantage of the known composition is reduced self-snuffing and relative elongation.

The closest among the known technical essence and the achieved effect is a polymeric composition based on polyethylene 15 containing chloroparaffin, antimony trioxide, pigment, stabilizer and rosin 2.

This composition does not possess the complex of necessary properties.

The purpose of the invention is to increase the fire resistance, fluidity and elasticity of the composition.

The goal is achieved by the fact that the composition, including poly- 25 ethylene, antimony trioxide, chloroparaffin, heat stabilizer and pigment, contains additionally contains cx, a, a, co-tetrachloroalkanes (C3-Cd) or a, a, a, d mixture) - tetrachloroalkanes (Sz-Sd) with a, a, sb-trichloroalkene zo

(Cz-Cd), and the components are introduced into the composition in the following amounts (per 100 parts by weight of polyethylene): antimony trioxide 5-30, chloroparaffin 0.1-30, cc, a, a, w-tetrachloroalkanes (Cz- Cd) or a mixture of a, a, a, sotetraloloklanov and a, a, a-trichloroalkenes (Cz-Ce) 0.5–20, heat stabilizers 0.2-0.8, pygmeite 0.2-0.3.

A mixture of a, a, a, co-tetrachloroalkyas and a, a, atrichloalkanes containing from 3 to 9 carbon atoms is obtained by the radiative heat calorization of a SLC with ethylene. Tetrachloroalkanes and trichloroalkenes are liquid substances. The chlorine content of these products is 45–70%. The relatively high chlorine content and small length of alkyl radicals cause the increased fire retardant properties of these compounds. In addition, their incorporation into iolymers improves the casting properties, which is very important for increasing the productivity of industrial equipment and the quality of commercial products. For the preparation of self-extinguishing compositions, pure 1,1,1,5-tetrachloropentane or the residue is used after distilling it from a, a, o, co-tetrachloroalkanes and a, a, a. Trichloralkene resin - tetrachloroalkanes. The preparation of the composition is driven in a high speed mixer. The final powdered compositions are loaded into a bunker, extruded on a twin-screw granulator at 140 ° C.

In the granulator, the properties of the resulting composition are determined. The determination of physical and mechanical properties and fire resistance is carried out according to GOST 16338-70.

Example 1. In a high-speed mixer load 100 kg of polyethylene powder, 10 kg of antimony trioxide, 15 kg of chlorine paraffin, 0.2 kg of carbon black, heat stabilizer

diafen FF 0.07 kg, turn on the stirrer, and while the mixer is running, add 0.5 kg of trichloropentane with 0.13 kg of the heat stabilizer of Azone A. dissolved in it. Mixing of the composition is carried out for 20 minutes at 20 ° C. The mixture is then discharged into a hopper and extracted on a ZSK 80/700 type twin-screw granulator. Physiomechanical properties and fire resistance according to GOST 16338-70 are determined in the grail torus. Properties of the resulting composition are given in table. one.

Table 1

Example 2. A speedy mixer is loaded with the same amount of componeites as in Example 1, but instead of 1,1,1,5 tetrachloropentane, 0.5 kg of tetrachloroalkap resin is taken in which the thermal stabilizer Neozoi A is dissolved in the same amount as and in example 1.

table 2

Example 3. Download the same number of components as in example 1, except for antimony trioxide 5 kg and 25 kg of chlorine-araffin. The sequence of operations is the same as in example 1.

Claims (2)

Example 4. All the same as in example 1, only antimony trioxide take 20 kg. chlorine paraffin 15 kg, soot 0.3 kg, diafena ff 0.6 kg, neozone A 0.2 kg. Example 5. Same as in example 1, only antimony trioxide - 10 kg, and resins of tetrachloroalkanes 1 kg. Example 6. Similar to example 1, except for the amount of chlorine paraffin 10 kg and resin tetrachloroalkanes 6 kg. Example 7. Chlorine paraffin 0.1, tetrachloroalkanes resin 20 kg. The full composition of the compositions in the examples and by a known method are given in table. 1, and the properties of the compositions in the table. 2. As can be seen from the above data, when using tetrachloropentane, the melt flow rate increases by 0.9 g / 10 min, the relative elongation at break is 4 times. The composition, when removed from the flame, fades instantly. When using resin tetrachloroalkan from 0.5 to 20 weight. hours per 100 weight. including polyethylene, these patterns are also preserved. It should be noted that with an increase in the amount of tetrachloroalkanes resin, the melt flow rate increases from 13.9 to 18 g / 10 min, its casting properties improve and the relative elongation at break from 450 to 600%, which characterizes the elasticity of the composition, improves. 6 Claim of the invention Polymer composition containing polyethylene, antimony trioxide, chloroparaffin, heat stabilizer and pigment, characterized in that, in order to improve fire resistance, fluidity and elasticity, it additionally contains a, a, a, carbon tetrachloroalkanes (C3-SD) or a mixture of a, a, a, co-tetrachloroalkanes (Cz-Cd) with a, a, a-trichloroalkenes (Cz-Cd) in the following ratio of components, weight. h .: Polyethylene100 Antimony trioxide 5 -30 Chloroparaffin 0.1-30 a, a, a, (y-tetrachloroalkane (C3-Cd) or a mixture of a, a, a, d) -tetrahloralkan (Cz-Cd) a, a a-trichloroalkene (Sz-Cd) 0.5-20 Thermal stabilizer 0.2-0.8 Pigment 0.2-0.3 Sources of information taken into account during the examination 1. USSR author's certificate no. 357213, cl. From 08L to 23/06, 1970. 2. Author's certificate USSR № 374338, cl. C 08L 23/06, 1970 (prototype).