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Outer layer rubber for high-temperature resistance flexible rubber hose

A rubber hose, high-temperature flexible technology, applied in the direction of hoses, pipes, pipes/pipe joints/pipe fittings, etc., can solve the problems of easy damage to the outer rubber layer, hardening of the inner rubber layer, detachment between layers, etc., and achieve physical properties Good, enhanced tensile strength, high modulus effect

Active Publication Date: 2019-02-15
LUOHE BONWELL RUBBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the existing high-temperature and oil-resistant hoses have the problem that the inner rubber layer becomes hard when the oil temperature is too high, and the interlayer separation is easy to occur during use. Oxygen and ozone in the air cause the outer rubber layer to oxidize and age to form cracks, and the outer rubber layer is easily damaged by friction. Flammability and other issues

Method used

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  • Outer layer rubber for high-temperature resistance flexible rubber hose
  • Outer layer rubber for high-temperature resistance flexible rubber hose
  • Outer layer rubber for high-temperature resistance flexible rubber hose

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The rubber material of the inner rubber layer is made of the following components in parts by weight: 50 parts of rubber raw material ethylene-vinyl acetate rubber EVM500HV, 35 parts of nitrile rubber NBR 2870, 15 parts of fluoroplastic, 1.6 parts of vulcanizing agent TCY, sulfur 0.2 parts of powder, 5.5 parts of activated zinc oxide, 60 parts of carbon black, 6.4 parts of plasticizer, 5.0 parts of hydroxyl silicone oil, 0.04 parts of magnesium methacrylate, 2.5 parts of anti-aging agent, 1.8 parts of accelerator CZ, 1.3 parts of stearic acid, Rare earth complex 0.005 part;

[0035] Further, the carbon black in the inner layer rubber component is fast extruded carbon black N550, high wear-resistant carbon black N330, and acetylene carbon black with a weight ratio of 2:2:1;

[0036] Further, the plasticizer in the inner layer glue component is coumarone resin and tricresyl phosphate in a weight ratio of 5:3;

[0037] Further, the anti-aging agent in the inner layer rubb...

Embodiment 2

[0052] The rubber compound of the middle rubber layer is made of the following components in parts by weight: 65 parts of rubber raw material nitrile rubber NBR, 35 parts of high-temperature acrylic elastomer HT-ACM, 50 parts of carbon black, 2.5 parts of sulfur powder, active oxidation 4.0 parts of zinc, 11 parts of liquid coumarone resin, 4 parts of plasticizer, 5.8 parts of antioxidant, 2.2 parts of stearic acid, 1.4 parts of accelerator DB;

[0053] Further, the carbon black in the middle layer rubber component is fast extruded carbon black N550, high wear-resistant carbon black N330, and acetylene carbon black with a weight ratio of 2:1:1;

[0054] Further, the plasticizer in the middle layer glue component is tricresyl phosphate and o-dibutyl ester in a weight ratio of 1:2;

[0055] Further, the anti-aging agent is anti-aging agent RD and anti-aging agent BLE with a weight ratio of 1:1.

[0056] Further, the preparation steps of the middle rubber layer rubber material a...

Embodiment 3

[0070]The rubber material of the outer rubber layer is made of the following components in parts by weight: 35 parts of rubber raw material EPDM, 65 parts of polyurethane elastomer rubber TPU, 19 parts of mica powder, 55 parts of carbon black, stearic acid 2.1 parts, 4.5 parts of plasticizer, 1.3 parts of accelerator DM, 0.8 parts of vulcanizing agent DCP, 0.76 parts of sulfur, 5.0 parts of anti-aging agent AW, 0.7 parts of composite flame retardant FR201;

[0071] Further, the carbon black in the rubber component of the outer layer is fast extruded carbon black N550, high wear-resistant carbon black N330, and acetylene carbon black with a weight ratio of 2:2:1;

[0072] Further, the plasticizer in the rubber component of the outer layer is dioctyl ester.

[0073] The preparation method of the rubber material for the outer rubber layer is as follows: (1) weigh each raw material by weight; (2) dry the TPU for 2 hours, mix it with EPDM after cooling, and add it to the preheated ...

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Abstract

The invention discloses outer layer rubber for a high-temperature resistance flexible rubber hose. The outer layer rubber is prepared from the following components in parts by weight: 35 parts of rubber material Ethylene-Propylene-Diene Monomer (EPDM), 65 parts of polyurethane elastomer rubber TPU, 9 parts of mica powder, 55 parts of carbon black, 2.1 parts of stearic acid, 4.5 parts of a plasticizer, 1.3 parts of a promoter DM, 0.8 part of a vulcanizing agent DCP, 0.76 part of sulphur, 5.0 parts of an ant-ageing agent AW, and 0.7 part of a composite flame retardant FR201. The invention further discloses a high-temperature resistance flexible rubber hose. The outer layer rubber material prepared by the invention is very good in fluidity, so that the hose can be softened to be to coil, hasvery good affinity with a middle rubber layer, and is difficult to fracture and good in wear resistance, and scratch resistance of the hose is greatly improved.

Description

technical field [0001] The invention relates to the field of rubber products, in particular to a high-temperature-resistant flexible rubber hose outer layer rubber. Background technique [0002] High-pressure rubber hoses are mainly used in hydraulic transmission systems. The working medium is mainly oil, the working temperature and pressure are relatively high, and the service conditions are relatively harsh. The rubber hose with excellent comprehensive performance is very important to ensure the reliable operation of the entire hydraulic system. Most of the existing high-temperature and oil-resistant hoses have the problem that the inner rubber layer becomes hard when the oil temperature is too high, and the interlayer separation is easy to occur during use. Oxygen and ozone in the air cause the outer rubber layer to oxidize and age to form cracks, and the outer rubber layer is easily damaged by friction. flammability and other issues. Contents of the invention [0003]...

Claims

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Application Information

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IPC IPC(8): C08L75/04C08L23/16C08K13/02C08K3/34C08K3/04C08K5/09C08K3/06C08K5/14C08L23/08C08L9/02C08L27/12C08K3/22F16L11/04
CPCF16L11/04C08L23/0853C08L75/04C08K2003/2296C08L2203/18C08L2201/08C08L23/16C08K13/02C08K3/34C08K3/04C08K5/09C08K3/06C08K5/14C08L9/02C08L27/12C08K3/22
Inventor 田海涛夏青王非陈亮丁春侠
Owner LUOHE BONWELL RUBBER
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