SU1106814A1 - Method of obtaining antistatic polymeric composition - Google Patents

Abstract

A METHOD OF PREPARATION with trinonylphenyl phosphite at 20-70 ° C, and polyvinyl chloride is first mixed with a metal-containing stabilizer ator, V and then with the previously prepared mixture of the above components at 70-120 ° C.

Description

The invention is from 1; Osits to methods of obtaining an antistatic polymeric composition based on polyvinyl chloride (PVC). processed in the material calender, extrusion, molding and other methods. AMI and used to obtain materials for various purposes, such as artificial leather, linoleum films, sheets and other products used for consumer goods and in other areas of the national economy It is characterized, along with good antistatic properties, by increasing its thermal stability and its stability. PVC as a diz. Hector has the ability to drip, to drink charges of static electricity. The electrification causes a strong contamination of products, such as film storage, on the readings in electrical measuring instruments. Various methods are used to prevent the accumulation of static electricity in PVC. It is known that to impart antistatic properties, solutions of azo-containing surfactants (surfactants) are applied to the surface of PVC products, for example, quaternary ammonium chimers are used. Despite the fact that this method of antistatic treatment maintains its original thermal stability color stability, transparency and other physicomechanical properties of the material; antistatic compounds applied to the surface from products are washed off with water. This leads to a significant increase in the electric charge on PVC products during operation. Particularly often, the method associated with the introduction of special chemical compounds - destatizers (an. Statistics) into the PVC composition is used. Their action is based on an increase in the electrical conductivity of materials causing the charge leakage. At the same time, the antistatic properties of the material are retained for several years, since the antistatic consumed is replaced by a new one — from the inner layers of the material. 142 Known for the quality of arstistatic additives introduced into the compositions of ha-PVC-based various nitrogen-containing compounds 2 and phosphorus; moreover, organic PLV SZ, P C (building antistatic PVC composidia, besides the effectiveness of antistatics, you have to consider their stability at processing temperatures, the possibility chemical interaction with the components of the formulation, the effect on the melt viscosity of the composition, thermal stability, color, transparency and other properties. Even at the processing temperatures of PVC materials The number of dyed polyenes is greater than iiiii and, accordingly, the thermal stability and color fastness of the material decreases, while the addition of 2 1 and C 3 j reduces the thermal stability and color fastness of the material, D. improves the color stability and increases the thermal stability of the antistatic PVC-composite-1-W, and various other additives are added. preparation of polymer composition G4, including the introduction of a tertiary formula (SNHCHAOI PI (CHNeH20) pN together with tnnkova and calcium fatty acids in plasticized PVC composite (diode Ktilad sp-pin 15-45 mash.), which allows to obtain an antistatic compound 31-n with color stability of 9-12 minutes and a thermal stability of 48-80 minutes. However, these characteristics are not high. In order to increase the color stability of antistatic compositions based on PVC, the latter is displaced with an α-stabilizer in conjunction with an antistatic com ––chcholeate propylene glycol or sorbitan; . ester and urea of NWT, Og-gako, this leads to a slight improvement in color stability and an increase in the thermal stability of the antistatic composition (up to 30 min at IBCPC). Special additives are used to improve the heat stability and color stability of the static PVC compositions using methods L 1 and C 5 1. The order of mixing the components is as follows; all components, including the antistatic agent, are mixed simultaneously at 20-100 ° C. The closest technical essence and effect achieved is the method for producing an antistatic polymer composition, which consists of the following; PVC is simultaneously loaded into the mixer, the metal containing heat stabilizer is a mixture of co-precipitated barium-steadies and lead acetate, epoxidized soybean oil, tertiary phosphite-tr nonylphenylphosphite, antistatic additive is sodium salt of 2-ethylhex phenylphosphoric acid (EHF). All components are mixed for 30 minutes at 70 ° C. Then the composition is rolled at 165 ° C for 7 minutes and pressed at 170 ° C for 5 minutes C61. However, the composition is known to have insufficiently high levels of thermal stability, color fastness and whiteness. The aim of the invention is to increase thermal stability, color fastness and whiteness while maintaining the antistatic properties of the composition. The goal is achieved by the method of producing an antistatic polymer composition comprising mixing a polyvinyl chloride metal-containing thermostab with a pizator, a tertiary fbsfit and a sodium salt of 2-ethylhexylphenylphosphoric acid, pre-mixed with a 2-ethylhexylphenylphenol phosphoric acid, a non-volatile phosphoric acid salt, preliminarily mixed with a sodium salt, 2-ethylhexylphenylphenylphosphoric acid; first mixed with a metal-containing stabilizer and then with a pre-obtained mixture of these components at 70-120 C. The method of obtaining antistatic PVC-com position allows to increase the thermal stability, color stability and whiteness of the obtained samples, as well as to preserve their antistatic properties (see, table examples 1-9) only by mixing, not adding additional components of the formulation. The proposed method of mixing an antistatic EGF with a tertiary phosphite can be used in the preparation of antistatic PVC compositions containing various thermostabilized PVC compositions can include plasticizers, fillers, lubricants and other additives. Example 1. Mixed at 20 ° C for 5-10 min 1 wt.h. EGF and 0.2 May, h trinonylphenyl phosphite (mixture A). Then the mixer is heated to 70 ° C. 100 m.ch. PVC (KF 60), 2 ma.ch, co-precipitated bari-cadmi stearate (1: 1), 2 ma.h. epoxidized soybean oil. All components are mixed for 20 minutes at 70 ° C. Then the mixture A is introduced into the mixer and all components are mixed for another 10 minutes at. Co-evaluation is rolled at 7 minutes, pressed at 170 ° C for 5 minutes. Pressed specimens are tested for specific surface electrical resistance (according to GOST 6433.2-71), thermal stability (according to GOST 1404168), color stability, and whiteness of measurements. p уt on the device BF-2 TU 2505-196675. The properties of the samples are given in the table. Examples 2-9, Compose; compositions, mixing temperatures and properties of the samples are given in the table. Mixing procedure, sample preparation method and test procedure are the same as in Example 1. From the data in the table it is natural that the preliminary mixing of an antistatic agent with a tertiary feed increases the thermal resistance of antistatic PVC composition from 88 minutes (Example 9) to 100-165 min, color fastness from 15 th to 70-100 min, whiteness from 83 to 90-94% (example 1-9). If instead of the antistatic EGF use another antistatic (examples 11 and 12), then the preliminary displacement of this antistatic with tertiary phosphite does not lead to an increase in thermal stability, color fastness and whiteness of the samples. If instead of a tertiary phosphite use another secondary stabilizing additive - epoxidized soybean oil, the preliminary mixing does not lead to an increase in thermal stability, color fastness and whiteness of samples (Example 1 3). , mixing these components at a temperature of Tvpe 4 20 ° C is not economically feasible1106814

different. When PVC is mixed, the thermostable of the mash and mixture A is at i 70 ° C, incompatibility of the components of the composition is observed, and at a temperature the decomposition of PVC begins.

The composition of the proposed method

Trinonyl-Co-precipitated-70 Phenylphosis Steafit 0.2 Rat Ba-Cd

Trinonyl-Co-precipitated-70 Phenylphosphate Steafit 1, 0 Rat Ba-Cct

Trinonyl-Co-precipitated phenylphosis steafit 15 5 rat

20

Triisoox-Coos den-70 tylphosphite stearate 1.0Ba-Cd (1: 1)

20

40

Trinonylphenylphosphite 1, O

9.5-10 ° 125 85

94 (1: 1) 2

,ten

92

, 5-10 115 80 (1: t)

3.5MO 100 70

70

90

Va-Ss (1: 1)

No.

5,0-tO 110 75

91

6-10 105 70

70

90

ten

too

4.5 10 115 80

42

70

92

80

Claims (1)

METHOD FOR PRODUCING AN ANTISTATIC POLYMERIC COMPOSITION, comprising mixing polyvinyl chloride with a metal-containing heat stabilizer, trinonylphenylphosphite and sodium salt of 2-ethylhexylphenylphosphoric acid, characterized in that, in order to increase thermostability, the color-stability of the mixture is low-viscosity and trinonylphenylphosphite at 2O-7O ° C, and polyvinyl chloride is first mixed with a metal-containing stabilizer, and that - with a preformed mixture of said components at 70-120 ° C. £ (/) s 11068/4