CS205182B1 - A method of additivation, preferably stabilization and / or antistatic treatment of linear synthetic polymers - Google Patents

Abstract

The purpose of the invention is additive, mainly stabilization and antistatic treatment of linear synthetic polymers. This purpose is achieved by adding additives to linear synthetic polymers in the form of a dispersion or a concentrated solution, while the dispersing medium or solvent is one or more components of the additive system.

Description

It is an object of the invention to provide an additive, in particular stabilizing and antistatic treatment of linear synthetic polymers, wherein the additives are added in the form of a dispersion or a concentrated solution and one of the components is a dispersing medium or solvent.

It is known that various additives, such as stabilizers, glidants, antistatic agents and others, need to be added to the polymers. The choice of additives is mainly determined by the type of polyser, the manner of its processing and the particular application, whereby the additives are required to be uniformly dispersed throughout the polymer to ensure good performance.

Currently, olefin polymers are additive by preparing so-called olefin polymers. concentrate, and this is most often metered into the polymer melt by an additional extruder. It is also known to add stabilizers as solutions in a suitable solvent, most often paraffinic oil. These methods, however, have several drawbacks in the preparation of concentrates with a limited concentration of additives, the need for investment costs associated with the purchase of special concentrate preparation equipment, and the operating costs associated with the preparation of the concentrate. Addition in the form of solutions by a metering pump has the great disadvantage that, due to the very limited solubility of the additives in suitable solvents, only very small amounts of additives can be metered into the polymer, while at the same time relatively solvent is supplied to the polymer.

According to the invention, a method of additivation, preferably stabilization and / or antistatic treatment of the linear, is carried out. synthetic polymers, preferably polyolefins, such that additives, preferably stabilizers and / or antistatic agents are added to the linear synthetic polymers in the form of a dispersion and / or a concentrated solution, the dispersing medium and / or solvent being one or more components of the additive system.

The dispersing phase or solvent is a suitable organic substance whose choice depends mainly on the polymer and chemical structure of the dispersed additives. It is preferred that the dispersing medium or solvent form one or more of the additives. The invention simply solves the process of adding various additives to olefin polymers even in larger concentrators and economically advantageous.

The use of dispersions or concentrated solutions for the addition of olefin polymers eliminates the considerable investment and operating costs involved in the preparation of concentrates and allows large quantities of additives (up to 5% by weight) to be metered into the polymer at a low inert rate. In the case where the dispersing medium is one of the additives, the dosing of the inert substance into the polymer is omitted completely.

Example 1

A 100% stabilizer solution at 130 ° C is metered into olefin polymers by metering

205 182 pump, wherein at least one of the components that serves as the solvent has a melting point of 53 ° C. The resulting content of stabilizers in the polymer is 0.8% by weight,

Example 2

A dispersion of the following composition is added to the polymer by means of a metering pump: 50 wt. % stabilizer mixtures 50 wt. "White paraffin oil so that the final content of stabilizers in the polymer! 0.5 wt.

Example 3

As in Example 2, a dispersion of 50 wt. % stabilizer mixtures 50 wt. antistatic so that the final content of stabilizers in the polymer! 0.5 wt. and antistatic agents 0.5 wt.

Example 4

As in Example 2, a solution of 50 wt. stabilizers 30 wt. % Of white mineral oil and 20 wt. antistatic agents.

The final additive content of the polymer is 0.5% by weight. % of stabilizers and 0.2 wt. antlstatík.

Example 5 *

As in Example 2, a dispersion of 50 wt.% Is added to the polymer at 80 ° C. % stabilizer mixtures, wt. % antistatic agents and 20 wt. a lubricant such that the final additive content of the polymer is 0.5 wt. % of stabilizers, 0.3 wt. and 0.2 wt. glidant.

Example 6

By the procedure of Example 2, a dispersion of 20% by weight is added at 75 ° C. wt. % stabilizer mixtures, wt. % antistatic, wt. glidant,

ΙΙΟ% wt. % brightener and% wt. 'White paraffin oil

The final additive content of the polymer is 0.2% by weight. 0.2% wt. glidant 0.1 wt. a clarifying agent

Claims (1)

% 10 wt. of a clarifying agent and 30 wt. The final additive content of the polymer is 0.2% by weight of a stabilizer of 0.2% by weight. The amount of additive is 0.2% by weight of the lubricant 0.1% by weight of the clarifying agent. antistatic treatment of linear synthetic polymers and preferably polyolefins such that additives, preferably stabilizers and / or antlstatics, are added to linear synthetic polymers, in the form of a dispersion / or concentrated solution, characterized in that the dispersing medium and / or solvent is preferably one or more components additive system