Butyl rubber composition, preparation method and method for preparing pressure hose

Abstract

The invention relates to a butyl rubber composition, a preparation method and a method for preparing a pressure hose. The preparation method comprises: (1) putting butyl rubber and chloroprene rubber on a roller, after the roller is completely coated, adding calcium carbonate, stearic acid and lithopone, performing mixing, then adding white carbon black in batches, performing mixing, then adding magnesium oxide, zinc oxide, an anti-ageing agent and a half amount of a plasticizer, performing mixing, then adding a coupling agent, paraffin and a tackifier, and performing mixing and thin passing; and (2) performing straining on mixed rubber by using a straining machine, putting on a roller again, then adding a vulcanizing agent, an auxiliary vulcanizing agent and the other half amount of the plasticizer, and performing mixing and thin passing. The prepared butyl rubber composition has excellent performance. By employing the butyl rubber composition for preparing a lining rubber pipe, the caking strength between a woven layer and a lining layer of a pressure-resistant airtight foldable hose is substantially improved, and the pressure-resistant performance and the airtightness of the hose are substantially improved.

Description

technical field [0001] The invention belongs to the field of polymer material processing, and relates to a butyl rubber composition, a preparation method and a method for preparing a pressure-resistant hose. Background technique [0002] Usually, the conveying hoses used in fire hoses or other special fields are composed of reinforced material woven tube blanks and anti-leakage lining materials, which require certain air permeability resistance, high pressure resistance, high temperature resistance, and weather resistance. The outer layer is mostly a cylindrical fabric woven with high-strength synthetic fibers or metal filaments, and the inner lining is mostly made of anti-leakage rubber or latex material. Latex-lined hoses have poor flexibility and are not easy to fold; rubber-lined hoses are widely used because of their good air tightness, lightness in use, easy operation, good flexibility and foldability within a certain temperature range. [0003] With the higher requir...

AI Technical Summary

Problems solved by technology

The pressure resistance performance depends on the high-strength braided jacket and the adhesion between the braided jacket and the inner rubber. If the bonding strength between the outer jacket and the inner rubber is high, the pressure resistance of the hose will be good. If the adhesive strength is poor, the hose will withstand pressure. poor performance

The air tightness mainly depends on the inner lining layer, so the inner lining layer material can choose butyl rubber with good air permeability resistance and low cost as the base compound, but because butyl rubber contains very few cross-linking double bonds, The bonding strength between the lining rubber material mainly made of butyl rubber and the braided layer jacket is poor, and its T-peel strength is less than 1.5N cm, which is easy to peel off, resulting in wrinkles on the surface of the hose and poor appearance quality, which affects the softness of the hose. The pressure resistance of the tube is high, and the service life is short; in addition, if the bonding force between the rubber lining and the braided outer tube blank is small, the rubber lining tube is easy to peel off and damage during the folding process of the hose, and cannot be repaired, resulting in scrap

[0004] Therefore, there is an urgent need to develop a lining rubber material with high strength combined with the braided jacket to solve the problem of bonding strength between the braided jacket and the rubber lining of the high-pressure airtight foldable rubber hose, thereby improving the pressure resistance and serviceability of the hose. life

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