SU486031A1 - Antistatic agent - Google Patents

Description

The invention relates to the field of processing of thermoplastic materials and relates to the process of iridapi thermal monom. Of antistatic properties. It is known to use as antistatic agents x salts of 1-hydroxyethyl-2-gentadecyl-2-imndazolium and sulfuric, hydrochloric, stearic acids, as well as 1-hydroxy-2-heptadecyl-2-carboxymethyl-2-and .m sodium dihydroxy sodium hydroxide . However, lime antistatic agents are not effective enough. The aim of the invention is the enhancement of the antistatic properties of thermally elastic iolimers. The goal is achieved by the use of the sodium or potassium salt of imidazolium compounds as the antistatic agent, which has the following general formula cri .. -sn, I CH CH OCH-NOOM N N. where R is an alkyl or alkenyl radical With / -C | 8, or naphthenyl radical (residue of naphthenic acids); L1 - sodium, cal nil. These compounds can be applied to the surface of a thermoplastic polymer, such as polyethylene, polypropylene, polystyrene, polymethylmethacrylate, 1lp introduced into the mass of the polymer during processing. The antistatics used have improved water resistance (poorly soluble in water) and, when introduced into the mass of low and high density polyethylene, exhibit a higher astistatic effect compared to the most effective industrial anthnatics of the type of alkamon that are soluble in water or mixed with it. Antistatic agents according to this invention are applied to the surface of iolimers from solutions with a concentration of 0.2-3.0 wt. % is introduced into the mass of polymers in the amount of 0.5-8.0 weight. % At the same time, the target additives can be applied: dyes, stabilizers, plasticizers, etc. The introduction of antistatic agents into the melt of polymers is possible with the usual methods: on rollers, in a plasto-mix, such as Banbury or in an extruder. Example 1. Disks with a diameter of 50 mm and a thickness of 1 mm made of low density polyethylene are immersed for 20 seconds in 0.2% -iib ii plant I .op i and hydroxide dig1a7ieg.oi salt I (f5 ka || -carboxymegl; 1 - 2 -1Uiyl-2-imidazoline in ethyl alcohol and then dried at room temperature in a vertical position for 1 day, p., the samples treated in this way are 4.4-10 ohms at a temperature of 20 ±: 3 ° С and relative humidity 65 ± 5%.

Example 2. Disks with a diameter of 50 mm and a thickness of 1 mm from polyronylene are immersed for 20 seconds in a 0.2% solution of the hydroxide of the 1- |: -carboxymethyl salt of the salt of the salt: - (3-hydroxyethyl -1-carboxymethyl-2-nonyl-2 -nmidazoline in ethyl alcohol and then dried at room temperature in a vertical position for 1 day, ps of samples treated in this way is 8.810 ° Ω at a temperature of 20 ± 3 ° C and a relative humidity of 65 ± 5%.

Example 3. Disks with a diameter of 58 mm and a thickness of 2 mm made of polystyrene are immersed for 20 seconds in a 0.2% solution of hydroxide of 1 - (:: 5-carboxymethyl) disodium salt - | 3-hydroxyethyl -1-carboxymethyl 2-nonyl-2 - imidazoline

C; T | 1 loi alcohol 11 borrowed rvLuai npsi roomsjiofi (p; Tvpr: g,; srtik, 1ly10L1 position Ji TCKMiJie 1 day.

j) s samples processed in this way are 2.8-10 ° ohm at a temperature

20 ± 3 ° С and relative humidity 65 ± 5%.

Prnmer 4. Disks with a diameter of 58 mm and

2 mm thick of polymethyl methacrylate is immersed for 20 seconds in a 0.2% solution of 1- (p-carboxymethyl) disodium hydroxide solution - | 3-hydroxyethyl -1-caboxymethyl-2-nonyl-2 amidazoline in ethyl alcohol and then dried at room temperature temperature in a vertical position for 1 day, p of samples treated in this way is 3.2-10 ° - ohm at a temperature of 20 ± 3 ° C and a relative humidity of 65 ± 5%.

Examples 5-26. The hydroxyndes of the alkali metal bisonals of the imidazoline imidazoline are applied to the surface of the polymers as in Examples 1-4. Changing nolymer and antistatic, concentration of antnestatic solutions and the results of the tests are listed in Table 1. one.

T a b l II and a 1

Specific surface electrical resistance of polymers for surface deposition of hydroxides of bis-salts of alkali metals of imidazoline derivatives.

Example 27. Low density polyethylene is mixed with 0.5 weight. % Hydroxide disodium salt of 1- (p-carboxymethyl) -p-hydroxyethyl -1-carboxymethyl-2-dodecyl-2 - imidazoline on rollers at a temperature of 135 ± 5 ° C for 7 minutes The obtained samples have a PS of 6.7-10 ° Ω at a temperature of 20 ± 3 ° C and a relative humidity of 65 ± 5% and have about-g 115 kgf / cm, Or 140 kgf / cm and B 600%.

Example 28. High density polyethylene is mixed with 1 wt. % Hydroxide sodium salt of 1- (p-carboxymethyl) -p-hydroxyethyl -1-carboxymethyl-2-dodecyl-2-imidazoline on a roller at a temperature of 155 ± 5 ° C for 7 minutes. The obtained samples have a PS of 1.7-10 ° Ω at a temperature of 20 ± 3 ° C and a relative humidity of 65 ± 5% and have a CTT of 245 kgf / cm2, 0p 145 kgf / cm and e 340%.

Example 29-32. The introduction of hydroxides of bispolol, desalcine metals, of impedazoline derivatives was dried, as described in Example 27. The properties of the sample are given in Table. 2

T a b l II c a 2

Examples 33-36. The introduction of alkali metal hydroxides of imidazoline derivatives is carried out in the same manner as in Example 28. The names of the polymers and antistatic agents, the number of antistatic agents administered and the properties of the tested samples are shown in Table 2.

Subject invention

Use as an antistatic agent of thermoplastic polymers of sodium or potassium salt of imidazoline compounds of general formula

g, n, -sn.

I 1 J, "; n, cn0sn, g, oom

he

N N

SN / -OOM

/

where R is an alkyl or alkenyl radical c, or a naphthenyl radical (naphthenic acid residue);

M - sodium, potassium.