CS261826B1 - Filler for materials for the manufacture of footwear bottoms - Google Patents

Abstract

The problem of eliminating the formation of agglomerates in materials based on vulcanized elastomers intended for the production of shoe soles is solved by using a rock filler with the aim of achieving advantageous physical and mechanical properties. The essence of the solution lies in the fact that the filler is formed by a mixture of natural hydrous aluminosilicates of alkali metals and/or alkaline earths with a particle size of up to 10 . 10 '’ m and a pore size of 2 . 1O"10 to 5 . 10"10 m of content, expressed in weight percent, 74 to 87 °/o silica, 10 to 13.5% aluminum oxide, 1.3 to 2.95% calcium oxide, 0.05 to 0.95 °/o sodium oxide, 1.3 to 2.85% potassium oxide and 0.1 to 6% water.

Description

The invention relates to a filler for materials for the production of shoe soles based on vulcanized elastomers.

In the production of rubber materials, manufacturers are currently focusing on the use of non-traditional fillers in the innovation process. These fillers are of a rock nature with a diverse structure and complex chemical composition. One of the types of rock fillers used in part in the rubber industry is, for example, kaolin, bentonite or smectite. Currently, rubber-based materials are known, which, in addition to the known components, contain as a filler rock shale ash containing oxides of silicon, aluminum, calcium, silver and sulfur. The specified filler increases the stability of these rubber mixtures. A material based on a mixture of non-polar rubber and a rock-type filler containing carbon, oxides of aluminum, iron, calcium, magnesium, potassium, sodium, sulfur and silicon is known. However, the use of this filler is limited and not very advantageous due to the high carbon content. Another known material is made of natural and synthetic rubber in the form of latex containing potassium paraffin, zinc oxide, rock bentonite and other common rubber additives. Also known is a sole material based on natural and polybutadiene rubber containing rubber additives and fillers, such as carbon black, silicon dioxide and mercaptosilane. Cork chips, sawdust, plastic waste and also amorphous aluminosilicate are also used as fillers. The disadvantage of using the above fillers, especially amorphous aluminosilicate, is the formation of agglomerates in the rubber material.

This deteriorates the physical and mechanical properties of the material, especially strength and ductility. The result of the formation of an agglomerate is the disruption or even breakage of the material.

The above disadvantages are largely eliminated by the filler according to the invention, the essence of which lies in the fact that it is formed by a mixture of natural hydrous aluminosilicates of alkali metals and/or alkaline earths with a particle size of up to 10.10" ⁵ m and a pore size of 2.10" ¹⁰ to 5 m. 10“ ¹⁰ mo containing 74 to 87% by weight of silicon dioxide, 10 to 13.5% by weight of aluminum oxide, 1.3 to 2.95% by weight of calcium oxide, 0.05 to 0.95% by weight of sodium oxide, 1.3 to 2.85% by weight of potassium oxide and 0.1 to 6% by weight of water. The filler, designated as zeochem, was prepared by treating rock zeolite, which was crushed and subsequently dried at a temperature of 300 °C. It was further sieved on a system of sieves and the above fraction was taken as a filler for practical use.

The technical effect of the invention lies in the uniform distribution of the filler in the material, which eliminates the formation of agglomerates. The hardness, modulus 300% and strength are increased. The ductility is reduced compared to previous shoe sole materials. The filler has advantageous absorption properties and absorbs odors arising during vulcanization, which improves the working environment in the production of shoe rubber materials.

The filler material according to the invention is further illustrated by the following examples, where the amounts of the components are given in parts by weight.

Example 1

The material for the production of shoe soles was prepared by homogenizing the following components:

synthetic polyisoprene

rubber 18.5 wt. d. synthetic butadiene-styrene rubber (30% methylstyrene, 15% oil) 0.2 wt. d. synthetic butadiene-styrene rubber (23% styrene) 6.2 wt. d. reclaimed rubber (from tires) tire) 12.4 wt. d. mercaptobenzothiazole 0.58 wt. d. diphenylguanidine 0.58 wt. d. zinc oxide 1.44 wt. d. stearic acid 0.21 wt. d. rosin 0.29 wt. d. phenylbetanaphthylamine 0.33 wt. d. asphalt 1.65 wt. d. aromatic oil 0.83 wt. d. carbon black GPF 10.3 wt. d.

mixture of natural alkali metal aluminosilicates (zeochem) with a pore size of 3.10" ^{!0 m} and a particle size of 2.10~ ⁵ m

micronized calcium carbonate sulfur 14.4 wt. d. - limestone 25.3 wt. d. 0.79 wt. d. A material with the following physical and mechanical properties was prepared: hardness tensile strength modulus 300% elongation 70 ShA 7.8 MPa 4.0 MPa 450% Example 2

The material for the production of shoe soles was prepared by homogenizing the following components:

natural rubber 20.8 wt. d. synthetic styrene-butadiene rubber (23% styrene j 5.2 wt. d. reclaimed rubber waste 15.6 wt. d. mercaptobenzothiazole 0.57 wt. d. diphenylguanidine 0.52 wt. d. zinc oxide 1.56 wt. d. titanium dioxide 1.56 wt. d. stearic acid 0.15 wt. d.

With β

pigment white 0.89 wt. d. synthetic butadiene-styrene rosin 1.05 wt. d. rubber (23% styrene] 13.8 wt. mixture of natural aluminosilicates mercaptobenzothiazole 0.73 hm alkali metals and alkaline diphenylguanidine 0.65 hm soil (zeochem) with size mercaptobenzimidazole 0.11 hm pores 5. 10 ¹⁰ mass size zinc oxide 1.2 hm particles ^5.10-5 m 10.5 wt. d. stearic acid 0.28 um, naphthenic oil 3.65 wt. d. paraffin 0.28 um, calcium carbonate — limestone benzoic acid 0.11 um, micro-aged 37.1 wt. d. titanium dioxide 2.5 um, sulfur 0.85 wt. d. pigment white 0.84 um,

d.

d.

d.

d.

d.

d.

d.

d.

d.

d.

mixture of alkali aluminosilicates

Material has been prepared with the following phy- soil (zeochem) with size physical-mechanical properties: particles 8 . 10 m and size pores 4. 10“ ¹⁰ m 33.7 wt. hardness 65 ShA calcium carbonate — limestone tensile strength 3.2 MPa micro-aged 20.7 lim ductility 400% finely ground rubber waste 3.38 wt. sulfur 1.02 wt. Example 3

d.

d.

d.

d.

A material with the following physical and mechanical properties was prepared:

The material for the production of shoe soles was prepared by homogenizing the following components:

synthetic butadiene-styrene rubber (25% styrene) 20.8 wt. d.

hardness tensile strength elongation modulus 300%

ShA

4.9 MPa

400%

1.8 MPa

Claims (1)

Filler for vulcanized elastomer based footwear materials, characterized by a mixture of natural aqueous alkali metal and / or alkaline earth aluminosilicates with a particle size of up to 10. . 10 ~ ⁵ m and pore size 2. ^_I 10 ° to 5. VYNALEZU. 10 ^{~! 0} possible content of 74 to 87% by weight of silica, 10 to 13.5% by weight Al, 1.3 to 2.95% by weight CaO 0.05 to 0.95 ° / o by weight of sodium oxide, 1.3 to 2.85% by weight of potassium oxide and 0.1 to 6% by weight of water.