SU1062241A1 - Antistatic polymeric composition - Google Patents

Abstract

ANTISTATIC POLYMERIC COMPOSITION based on ethylene homo- or copolymer or mixtures thereof, including non-ionic surfactant, stabilizer and organosilicon compound, characterized in that, in order to obtain hydrophilicity and resistance to light aging, it contains siloxanediol as an organosilicon compound The general formula is HO (CH3) 2-SiOla-lRR SiO H, where R is SI, C, Hj; R CH, CjHj, P / ha - from 2 to 15, the content of hydroxyl groups is 1.512 mol.% In the following ratio of components, wt.%: Homo- or copolymer of ethylene 88-99,89 or their mixture (L Stabilizer 0.05 -2 Non-ionogenic surfactant be0, 05-5. Substance Siloxane diols 0.01-5 g: SD SD 1

Description

This invention relates to anti-polymeric polyolefin compositions that are used to prepare non-electrifying films, sheets, and other details, and can be used in the field of agriculture. A known antistatic composition based on ethylene homo- or copolymer, containing a non-ionic surfactant and a silicon-containing compound, silicon dioxide ij. The disadvantages of the composition are low hydrophilicity, insufficient resistance to light aging and opacity. In addition to the composition containing aerosil, it is non-technological to manufacture because of the aerosil dusting and its abrasiveness. The antistatic composition based on ethylene homo- or copolymer or their mixture, including non-ionic surfactant, stabilizer and organosilicon compound, is the closest to the technical essence and the effect obtained. The latter uses low molecular weight polydimethylsilox new rubber or octamethyl cyclotetic rasiloxane (D-4 silicone fluid) 2. However, this composition has insufficient hydrophilicity and resistance to light aging, which significantly impairs the performance properties of polymer products obtained on the basis of this composition. The aim of the invention is to increase the hydrophilicity and resistance to light aging of products based on the proposed composition. To achieve this goal, an antistatic polymer composition based on ethylene homo- or copolymer or a mixture of them, including a non-ionic surfactant, a stabilizer and a silicone compound, contains the siloxane diols of the general form HO G (CH3) 2-310 Jo- fuVSiO gN, where R is CH, 6 h / m is from 2 to 15, the content of hydroxyl groups is 1, 5-12 mol. % with the following ratio of components, May.%; Homo-or ethylene copolymer. or a mixture of them88-99.89 Non-ionic surface-to-surface active, 0.05-0-5 substance 0.05-2 Stabilizer Siloxane diols 0.01-5 As a nonionic surfactant, the composition contains etamin-T-12 ethoxylated amine or scaloks SP-9- ethoxylated stearic acid or palmitic acid and others. Bisalkofen BP, tialkofen BM, diafen FF, diafen HH, neozon D, neozone DA, ionol BENZON, OA and others can be used as a stabilizer. The antistatic polymer composition can be obtained by mixing the components at an elevated temperature, for example, on rollers or in a Banbury type mixer. The mixture of components can also be carried out at the stage of granulation of the first stage by introducing a mixture of additives into the low pressure separator or granulator. Example (control of the prototype). 95% by weight of low density polyethylene with 45% by weight of etamine T-12, 0.5% by weight of benzene OA, 0.5% by weight of low molecular weight polydimethylsiloxane SKTN A rubber are mixed for 10 minutes in a Banbury type mixer. The sample made from the composition has the following properties: PTR - 2.0 g / 10 min, St-8, 5 Mn / m2; GP - 11.1. Mn / m, e - 570%, p9 0.110 Ohm, .M -19.1%, G-15, -2 mm After light-aging under the lamp ДРТ-375 for 5 days: M - 27.3%, bg - 6.3 Mn / m, br - 8.9 Mn / m, - 470%, MFR - 1.2 g / 10 min, p 1, Ohm, Example ry 2-5. Based on low density polyethylene, they were compiled according to the formulations of Table 1 according to the mode of Example 1. The following compounds were used as siloxane diols: with the group R - CH-J, R -, P / t - 15 (siloxane diol 1) and with the group R -, R - СНг, и / т - 2 (siloxane diol P) or a mixture of siloxane diols G and P (hydrolyzate). The properties of the composition are shown in Table 1, Example. (Control of the prototype). 95.5% of ethylene copolymer with vinyl acetate, 1% of Stearox SP-9, 3% of silicone fluid D-4, 0.5% of OA benzon are mixed in a Banbury type mixer at 160t5c for 10 minutes. The resulting composition has the following properties :, P1P 1, 6 g / 10 min, bg - 10.0 Mn / m, 6p - 11.0 Mn / m, € - 800%, PS 0, -102 ohm, M - 15.8% .G - 13.2 mm After light-aging under the lamp ДРТ-375 for 5 days: M - 21%, bt - 7 Mn / m, br - 8.5 Mn / m, 600%, PTR - 1.3 g / 10 min, p-, 0.610 ohm.

Examples 7-10. Based on a copolymer of ethylene with vinyl acetate (CEMA) and a copolymer of ethylene with propylene (BOT), prepared according to the recipes of table 2 according to the mode of example b. The following compounds were used as siloxane diols: R - CH3, R - n / m - 15 (siloxane diol III) and R -, R -, tt / m - 10 (siloxane diol iv) or a mixture of siloxane diols III and IV (hydrolyzate). The properties of the composition are given in table 2.

The proposed composition has a specific surface electrical resistance (rd) of 0.1 10 -0.810 ° Ω, a tensile yield strength () 10.2 - 15.0 Mn / m, breaking stress at stretching (b) 12.1 16, 8 MN / m, relative elongation (F) 580–800%, in terms of the melt flow rate — 2.3–3.7 g / 10 min. The turbidity of the film with a thickness of 80-100 | UK (M) -.9.1-17.0%, hydrophilicity - 17.4 - 34.8.

After light aging by the pampa. MDT-375: PTR - 2.1-3.5 g / 10 .1IN; . (it is 10.2 - 14.0 GP, - 11.9 15, 1.Mn / m, - 550-790%, M - 12.0 18.0%, 5 - 0.2-10 - 0.110 Ohm .

The proposed composition combines good physicomechanical, optical, antistatic properties, and in hydrophilicity and resistance to light aging far exceeds that known and can be used for the manufacture of sheets and, mainly, a film intended for closing greenhouses in rural areas. host Resistance to light and heat aging will significantly extend the life of the film without deteriorating the main

properties: transparency, conductivity, strength and hydrophilicity.

Table 1

2.0

2.3

H

0.8.10

0.1-10

Yield point at stretching, Mn / m

13.1

11.1

.S70

620

2.9

3.7

2.5

0.7-10 0.110 0.510

10.2

10.5

10.7

12.8

12.1

12.6

580

600

590 19.1 9.1 13.2 17., 4

After light aging under the lamp ДРТ375 for 5 days:

2.1

1.2

6.3

10.0

12.8

8.9

relative elongation,% 470,560

turbidity of 27.3 12 specific surface electrical resistivity0; Ohm 1 10

Continued tailed

12.8

15.0

1Ы

20.0

23.3

16.5

2.35

3.5

2.7

9.8

9.7

9.6

12.0

11.9

12.2

550

560 13 17 0, 0.3-10 ° 0.6-10

2.8 2, 3

0.110

0.3.10

13.4

13.2

14.1

14.5

800

850 19.2 16.5. . 15.8 20.8

2.5

1,3

table 2

2.5

3.0

2.9

fl

0.2 th

0.410

14.2

15.0

13.8

14.5

16.8

14.8

880

820

810

15.0

13.1

17.0

34,8

28.2

32.5

2.8

2.6

2.2

13.0

7.0

14.0

8.5

600

770 17.8 21.

1 P

0.6-10 0.2-10

sevilen - copolymer of ethylene with vinyl acetate

x BOT - a copolymer of ethylene and propylene.

Continued table. 2

13.5

14.0

13.9

15.1

750

790 16.5 14.0

0.6109 0.1 10 0.6. ten

Claims (1)

ANTISTATIC POLYMER COMPOSITION based on a homo- or copolymer of ethylene or a mixture thereof, comprising a nonionic surfactant, a stabilizer and an organosilicon compound, characterized in that, in order to obtain hydrophilicity and resistance to light aging, it contains a siloxane diol as an organosilicon compound ^ general formula H0 [(cn ₃ ) _r - si 0 V [R ^ SiO] ή Η, where R 'is CH ₃ , C ₂ H _$ ; R is CH ₃ , C? H ₅ , C ^ Well; Π / m - from 2 to 15, the content of hydroxyl groups of 1.512 mol.% In the following ratio of components, wt.%: Homo or copolymer of ethylene or their mixture 88-99.89 Stabilizer 0.05-2 Nonionic superficially active ve- society 0.05-5 Siloxandiols 0.01-5 SU „1062241