CS207152B1 - Polymere mixture on the basis of the polyvinyle substance - Google Patents

Description

BACKGROUND OF THE INVENTION The present invention relates to a polyvinyl-based polymer blend which, as internal anti-static agents, comprises a condensation product of diarnine and higher fatty acids.

It is well known that antistatic properties can be achieved in two ways: by incorporating the wearer of the antistatic property into the polymerization feed chain,

- introducing a suitable additive into the polymer substrate.

For reasons of simplicity and economic accessibility, a second method is practiced in practice.

The antistatic properties of the polymer blend can be achieved by the addition of surfactants, whether anionic, cationic, amphoteric or nonionic. Examples of anionic agents include alkyl and dialkyl phosphoric acid derivatives.

Of the cationic substances, quaternary ammonium bases are most commonly applied, in which the anionic character determines the thermal stability and the degree of dispersion of the additive into the polymer. Amphoteric surfactants can be obtained in a simple way from the anioactive ones by introducing an amino group into the molecule. Nonionic surfactants are typically obtained by condensing organic hydrogen containing active hydrogen molecules with ethylene oxide.

When antistatic agents are applied to the polyvinyl-type materials, they often migrate rapidly and thus cease to have an antistatic effect. This negative effect is due to an imbalance between the miscibility and the diffusivity of the surfactant and the polymeric substrate. Antistatic efficiency tends to be insufficient at low temperatures and low relative humidity values. The low thermal stability of antistatic agents at processing temperatures of polyvinyl materials often leads to their destruction and subsequent discoloration of the polymer substrate. .

These drawbacks are eliminated in the production of the polyvinyl mass according to the invention in that 0.1 to 8 parts by weight based on 100 parts by weight of the polymer of the condensation product diarnine and higher C ₁₂ -C 8 fatty acids are introduced into the polyvinyl mass. the melting of the condensation product is 50 to 95 ° C,

Supplementary lubricants, antioxidants, pigments, fungioidam UV absorbers and other additives may also be present in the composition of the invention.

Polyvinyl plastics is understood to mean polymers having a basic structural unit ( ^{CH 2} -C x) wherein X may be halogen, nitrile, alkyl, aryl and the like.

Tough polyvinyl laromatic material is understood to mean polystyrene which contains a modifying component of an unsaturated elastomer and / or terpolymers which contain, in addition to the styrene and elastomeric components, another component, for example acrylonitrile, methylstyrene. Typical representatives of tough polyvinylaromatic materials are so-called tough polystyrene and ABS polymer.

The polymer blend prepared according to the invention exhibits very good antistatic properties, which are determined by an optimal balance between the miscibility and diffusivity of the diamine-C ₁₂ to C ₂₄ fatty acid condensation product, a _{clay substrate} . The material prepared according to the invention shows a reduced ability to electrify. The condensation product applied according to the invention has a large antistatic function that can partially or completely replace the lubricant function of polymer blends. The mixture is harmless to health. The polymer blend prepared according to the invention is well processable by conventional forming technologies such as extrusion, injection molding, blow molding and the like. <

The very good properties of the polymer blends prepared according to the invention are demonstrated in the following examples.

The values of surface resistances measured according to ČSN 34 6460 of individual mixtures prepared according to individual examples are given in Table no

Example no

A polymer blend was prepared which contained 70 parts by weight of suspension polyvinyl chloride with a K-value of 65 30 parts by weight of dioctyl phthalate 5 parts by weight of anoganiocene pigment parts by weight of heat stabilizer 0.5 parts by weight of UV stabilizer

3.0 parts by weight of a condensation product of diamines with fatty acids, C ₁₂ - C ₂₄ m.p.

- 95 ° C.

The surface resistance values of the material prepared from said mixture are given in Table 1.

Example 2

^One mixture was prepared containing 96 parts by weight of emulsion-prepared polyacrylonitrile

1.5 parts by weight of stabilizer

1.0 parts by weight of inorganic pigment

3.0 parts by weight of the condensation product diamine with C ^ ₂ θ fatty acids with a melting point of 60 - 95 o _c 24

The surface resistance values of the material prepared according to Example 2 are shown in Table 1

Example 3

It was prepared polymer mixture contained 98 parts by weight of polystyrene type Krasten suspending 127 parts by weight of the condensation product of the diamine and fatty acid _C-2 - C ₂₄ with a melting point of ^60-95 ° C.

The surface resistance of the material prepared according to Example 3 is shown in Table 1

Example 4

A mixture was prepared containing

100 parts by weight of tough poystyrene with an elastomeric phase content of 6.5 parts by weight of parts of the condensation product of diamine and C ₂ fatty acids - melting point 60.95 ° C.

The surface resistance of the material prepared according to Example 4 is shown in Table 1

Example 6.5

A mixture was prepared that contained

100 parts by weight of an ABS terpolymer having an elastomeric phase content of 13% 3 parts by weight of a condensation product of diamine and C ₁₂ - ₂ 24 fatty acids ^with a melting point of 60 to 95 ° C.

The surface resistance of the material prepared according to Example 6.5 is shown in Table 6.1

Example 6.6

A mixture was prepared containing:

100 parts by weight of ABS terpolymerization with 15% elastomeric phase content

0.3 parts by weight of the condensation product of diamine and C8 to C8 fatty acids with a melting point of 60 to 95 ° C

The surface resistance of the material prepared according to Example 6 is shown in Table 6.1

Example 6.7

A mixture was prepared comprising:

parts by weight of suspended polyvinyl chloride with a k-value of 65 30 parts by weight of dioctyl phthalate parts by weight of inorganic pigment parts by weight of heat stabilizer

0.5 parts by weight of UV stabilizer parts by weight of the condensation product diamine with C18-C18 fatty acids with a melting point of 60-95 ° C.

The surface resistance of the material prepared from the above mixture is given in Table 6.1, Table 6.1 mixture UN No. surface number gdpor (in Ohms) according to UN 346450

6,3.10 ¹⁰

8.2.10 ¹¹ 1 2

1,2.10 ¹ ^

3.5.10 ¹¹

9.1.10 ¹¹

2,5.10 ¹²

7.Ο.1Ο ⁹

A surface resistance of 10 ¹¹ Ohms and lower for the prepared mixtures indicates good antistatic properties.

Claims (1)

, OBJECT OF THE INVENTION A polyvinyl based polymer blend comprising from about 0.1 to about 8 parts by weight based on about 10 parts by weight of the polymer, the condensation product of diamine and higher fatty acids, Cg to Cg, wherein the melting point of the condensation product is 50 to 95 ° C.