BG178Y1 - Modificated mineral fillers for the polymer blends - Google Patents

Abstract

The synthetized amino- and hydroxyaminoderivatives of the stearic acid and the condensation products between 9-hydroxy, 10-chloretearic acid and aromatic amines can be used as ingredients in rubber stock. Introduced in the rubber stock in lieu of stearic acid, 9-aminostearic acid and 9-hydroxy, 10-aminostearic acid act as secondary vulcanization agents improving the physicomechanical properties of the vulcanizates. Compounds with formula (formula) possess improved protection effect in working media - fluids in comparison with the trade mark products - Vulkanox 4010. (11) 179

Description

The utility model is used in polymer chemistry for the manufacture of technical articles.

BACKGROUND OF THE INVENTION

It is known from (1, 2) modified mineral fillers that are incorporated into polymer blends representing synthetic or natural products modified with stearic acid.

Modified natural and synthetic silicon derivatives are also known, which are also incorporated into polymer blends (3).

The essence of the utility model

The essence of modifying mineral fillers for polymer blends is to treat their particles with aminostearic acid or aminohydroxystearic acid in an amount of from 1 to 4 parts by weight. per 100 parts by weight filler.

When the mineral filler is a natural product, its modification is carried out at the end of its dispersion to colloidal dimensions.

When the mineral filler is a synthetic product, the modifying agent is added at the end of its synthesis.

The modified mineral filler is embedded in the polymer blend in an amount of 30 to 300 parts by weight. per 100 parts by weight polymer.

Amino-stearic acid or amino-hydroxystearic acid in an amount of 1 to 4 parts by weight are used as the modifying agent for the light mineral fillers. per 100 parts by weight filler.

The mineral filler thus modified is embedded in the polymer blend in an amount of 30 to 300 ppm. at 100m polymer.

In the polymer industry, natural fillers are nowadays used as natural mineral fillers - chalk, kaolin, diatomaceous earth and others, which are used after the dispersion of natural products, synthetic precipitated calcium carbonate, colloidal silicic acid, calcium silicate, zinc oxide and others produced precipitation of their water soluble forms.

Examples of implementation of the utility model

The modification of the natural mineral filler with aminostearic acid is as follows.

After dispersing the natural mineral filler (chalk, kaolin and others) by some of the methods adopted in practice, to 1 000 m parts of an aqueous solution containing from 100 to 120 m.s. micronized filler, at a temperature of from 50 to 80 ° C is added with stirring for 10 to 15 minutes from 100 to 150 m.p. a 2% aqueous solution of the ammonium salt of aminostearic acid. The modified natural mineral filler thus obtained is filtered, dried at a temperature of 100 to 150 ° C, and then introduced into the polymer mixture.

The modification of the synthetic mineral fillers with aminostearic acid is as follows.

After the synthesis of the synthetic mineral fillers / precipitated calcium carbonate, colloidal silicic acid, zinc oxide and others (by condensation method) is completed, to its water-colloidal solution at a concentration of 100-120 ppm. filler in 1000 ppm of water at a temperature of the reaction medium of 50 to 80 ° C and with stirring for 10 to 15 minutes was added from 100 to 150 ppm. a 2% aqueous solution of the ammonium salt of aminostearic acid.

Upon completion of the modification process, the synthetic mineral filler thus obtained is dried at 100 to 150 ° C and then introduced into the polymer blends.

Similarly, subject to the same concentration ratios, the same temperature range, and the same duration of the described processes for modification with aminostearic acid, of the natural and synthetic mineral fillers, the processes of modification of the natural and synthetic mineral fillers with amino hydroxystearic acid also proceed.

Table 1

Physicomechanical characteristics of BSC vulcanizates into which mixtures have introduced untreated precipitated calcium carbonate and treated with aminostearic and aminohydroxystearic acid

Ingredients in pp Mixtures

I II III

Bulex 1500 100.00 100.00 100.00 Zinc oxide 5,00 5,00 5,00 Stearin 1.50 1.50 1.50 Antifoil 401 ON A 1.50 1.50 1.50 Sulfur 2.25 2.25 2.25 CZ vulcanitis 1,25 1,25 1,25 Tiuram 0.35 0.35 0.35 Liquid paraffin 8,00 8,00 8,00 Untreated calcium precipitate carbonate 100.00 Precipitated calcium carbonate - treated with aminostearin acid - 100.00 - Precipitated calcium carbonate, treated with aminohydroxystea- tartaric acid - - 100.00

Physicomechanical characteristics of vulcanizates

1. Shore hardness in ° Shore 52 61 59 2. The module at 300%, relative retention in MPa 2.0 2.4 2.3 3. Tensile strength in MPa 6,8 9.5 8.2 4. Relative elongation, in% 660 580 620 5. Residual extension, in% 20 15 20

Table 2

Comparison table for the behavior of BIA vulcanizates in which a natural product activated with aminostearic or aminohydroxystearic acid is introduced

Ingredients in pp Mixtures I II III Bulex 1500 100.00 100.00 100.00

Zinc oxide 5,00 5,00 5,00 Stearin 1.00 1.00 1.00 4010 NA antistatic agent 1,500 1.50 1.50 Sulfur 3.50 3.50 3.50 CZ vulcanitis 2.00 21,00 2.00 Technical Vaseline 8,00 8,00 8,00 Untreated kaolin 50.00 - - Amine treated kaolin stearic acid - 50.00 - Amine treated kaolin hydroxystearic acid - - 50.01

Claims (4)

Modified mineral fillers for polymer blends, characterized in that the mineral fillers are modified with aminostearic or aminohydroxystearic acid in an amount of from 1 to 4 parts by weight. at 100m filler. Modified mineral fillers for polymeric materials (mixtures) according to claim 1, characterized in that when the mineral fillers are natural products, the modification is carried out at the end of dispersion to colloidal sizes. Modified fillers for polymer blends according to claim 1, characterized in that when the mineral filler is a synthetic product, the modifying agent is added at the end of its synthesis. Modified mineral fillers for polymer blends according to claim 1, characterized in that the modified mineral fillers are introduced into the polymer blend in an amount of from 30 to 300 ppm. at 100m polymer.