CN-121993670-A - Brake hose with low expansion performance

CN121993670ACN 121993670 ACN121993670 ACN 121993670ACN-121993670-A

Abstract

The invention relates to the technical field of hoses, and provides a brake hose with low expansion performance, which sequentially comprises an inner adhesive layer, a first reinforcing layer, a middle adhesive layer, a second reinforcing layer and an outer adhesive layer from inside to outside, wherein the inner adhesive layer and the outer adhesive layer are made of the same material, the inner adhesive layer and the outer adhesive layer are made of ethylene propylene diene rubber materials, the ethylene propylene diene rubber materials comprise ethylene propylene diene rubber, brominated butyl rubber, modified carbon black, first white carbon black, first zinc oxide, first stearic acid, an antioxidant, a flow aid, a first plasticizer, a first adhesive, a first vulcanizing agent and a first accelerator, the modified carbon black is obtained by modifying carbon black through an aliphatic polyurethane acrylic copolymer dispersoid, the middle adhesive layer is made of styrene-butadiene rubber and a natural rubber composite material, the first reinforcing layer is formed by weaving polyester dipping threads, and the second reinforcing layer is formed by weaving vinylon threads. Through the technical scheme, the problem of insufficient tensile strength of the outer adhesive layer in the related technology is solved.

Inventors

GAO YI
LI RONGCAI
LIU XIAOQIAN
JIAO MEI
WANG BAOLE

Assignees

河北金星科技有限公司

Dates

Publication Date: 20260508
Application Date: 20260314

Claims (10)

1. The brake hose with the low expansion performance is characterized by comprising, from inside to outside, an inner adhesive layer, a first reinforcing layer, a middle adhesive layer, a second reinforcing layer and an outer adhesive layer, wherein the inner adhesive layer and the outer adhesive layer are made of the same material, the inner adhesive layer and the outer adhesive layer are made of ethylene propylene diene rubber materials, the ethylene propylene diene rubber materials comprise, by weight, 100 parts of ethylene propylene diene rubber, 5-10 parts of brominated butyl rubber, 60-80 parts of modified carbon black, 10-20 parts of first white carbon black, 5-7 parts of first zinc oxide, 1-3 parts of first stearic acid, 2-4 parts of an anti-aging agent, 1-2 parts of a flow aid, 8-12 parts of a first plasticizer, 5-8 parts of a first adhesive, 1-2 parts of a first vulcanizing agent and 3-5 parts of a first accelerator, and the modified carbon black is obtained by modifying an aliphatic polyurethane acrylic copolymer dispersion; The raw materials of the middle adhesive layer comprise, by weight, 100 parts of styrene-butadiene rubber, 50-60 parts of natural rubber, 100-120 parts of carbon black, 20-40 parts of second white carbon black, 5-8 parts of a second plasticizer, 6-10 parts of second zinc oxide, 1-3 parts of second stearic acid, 1-3 parts of a second vulcanizing agent, 2-5 parts of a second accelerator and 3-5 parts of a second adhesive; The first reinforcing layer is formed by weaving polyester impregnated wires, and the second reinforcing layer is formed by weaving vinylon wires.
2. The brake hose with low expansion property according to claim 1, wherein the raw material of the modified carbon black comprises carbon black and an aliphatic polyurethane acrylic copolymer dispersion in a mass ratio of 100:7-9.
3. The brake hose with low expansion property according to claim 1, wherein the preparation method of the modified carbon black comprises the steps of adding the aliphatic polyurethane acrylic copolymer dispersion into a solvent for uniform dispersion, adding the carbon black for mixing, filtering and drying to obtain the modified carbon black.
4. A brake hose having low expansion properties according to claim 3, wherein the mixing temperature is 50 to 60 ℃ and the mixing time is 1 to 2 hours.
5. A brake hose having low expansion properties according to claim 1, wherein the brominated butyl rubber is comprised of a first brominated butyl rubber and a second brominated butyl rubber, the first and second brominated butyl rubbers having different mooney viscosities.
6. The brake hose having low expansion properties according to claim 5, wherein the first brominated butyl rubber has a mooney viscosity of 32 under test conditions of ML (1+8), 125 ℃, and the second brominated butyl rubber has a mooney viscosity of 46 under test conditions of ML (1+8), 125 ℃.
7. The brake hose with low expansion property according to claim 5, wherein the mass ratio of the first brominated butyl rubber to the second brominated butyl rubber is 1:2-3.
8. The brake hose having low expansion property according to claim 1, wherein the anti-aging agent comprises one or more of an anti-aging agent MB, an anti-aging agent CZ, an anti-aging agent RD.
9. A brake hose having low expansion properties according to claim 1, wherein the first and second plasticizers each independently comprise one or more of dioctyl sebacate, dioctyl terephthalate, diisononyl phthalate.
10. A brake hose having low expansion properties according to claim 1, wherein the first and second adhesives each independently comprise one or both of adhesive a, adhesive RS.

Description

Brake hose with low expansion performance Technical Field The invention relates to the technical field of hoses, in particular to a brake hose with low expansion performance. Background The low-expansion brake hose is a key flexible connecting piece in various motor vehicles and rail transit vehicle brake systems, and has the core effects of transmitting brake media such as brake fluid or compressed air in the brake execution process, realizing effective transmission of brake pressure and guaranteeing accurate response of a brake mechanism. With the continuous improvement of the brake response speed, the brake precision and the extreme environment adaptability in the automobile industry, higher requirements are put on the performance of the brake hose with low expansion performance. The outer rubber layer of the brake hose is used as an outer protective structure of the brake hose, and the strength of the outer rubber layer directly determines the overall service life and reliability of the hose. In order to improve the strength of the outer adhesive layer, the prior art generally adopts a method of adding carbon black into rubber as a reinforcing agent, however, the carbon black is easy to agglomerate in a rubber matrix, so that the performance of the outer adhesive layer cannot be well improved, the long-term stable protection effect of the outer adhesive layer on the inner reinforcing layer is weakened, and the integral performance degradation of the hose caused by the damage of the external environment can be accelerated, so that the preparation of the brake hose with high tensile strength and low expansion performance has important significance. Disclosure of Invention The invention provides a brake hose with low expansion performance, which solves the problem of insufficient tensile strength of an outer adhesive layer in the related technology. The technical scheme of the invention is as follows: The invention provides a brake hose with low expansion performance, which sequentially comprises an inner adhesive layer, a first reinforcing layer, a middle adhesive layer, a second reinforcing layer and an outer adhesive layer from inside to outside, wherein the inner adhesive layer and the outer adhesive layer are made of the same material, the inner adhesive layer and the outer adhesive layer are made of ethylene propylene diene rubber materials, the ethylene propylene diene rubber materials comprise, by weight, 100 parts of ethylene propylene diene rubber, 5-10 parts of brominated butyl rubber, 60-80 parts of modified carbon black, 10-20 parts of first white carbon black, 5-7 parts of first zinc oxide, 1-3 parts of first stearic acid, 2-4 parts of an anti-aging agent, 1-2 parts of a flow aid, 8-12 parts of a first plasticizer, 5-8 parts of a first adhesive, 1-2 parts of a first vulcanizing agent and 3-5 parts of a first accelerator, and the modified carbon black is obtained by modifying an aliphatic polyurethane acrylic copolymer dispersion; The raw materials of the middle adhesive layer comprise, by weight, 100 parts of styrene-butadiene rubber, 50-60 parts of natural rubber, 100-120 parts of carbon black, 20-40 parts of second white carbon black, 5-8 parts of a second plasticizer, 6-10 parts of second zinc oxide, 1-3 parts of second stearic acid, 1-3 parts of a second vulcanizing agent, 2-5 parts of a second accelerator and 3-5 parts of a second adhesive; The first reinforcing layer is formed by weaving polyester impregnated wires, and the second reinforcing layer is formed by weaving vinylon wires. As a further technical scheme, the raw material of the modified carbon black comprises carbon black and an aliphatic polyurethane acrylic copolymer dispersion with the mass ratio of 100:7-9. The preparation method of the modified carbon black comprises the following steps of adding the aliphatic polyurethane acrylic copolymer dispersion into a solvent for uniform dispersion, adding the carbon black for mixing, filtering and drying to obtain the modified carbon black. As a further technical scheme, the mixing temperature is 50-60 ℃, and the mixing time is 1-2 h. As a further technical scheme, the brominated butyl rubber consists of a first brominated butyl rubber and a second brominated butyl rubber, and the Mooney viscosities of the first brominated butyl rubber and the second brominated butyl rubber are different. As a further technical scheme, the Mooney viscosity of the first brominated butyl rubber is 32, the test conditions are ML (1+8) and 125 ℃, the Mooney viscosity of the second brominated butyl rubber is 46, and the test conditions are ML (1+8) and 125 ℃. According to the invention, the elongation at break of the outer rubber layer of the brake hose with low expansion performance is improved by adding the first brominated butyl rubber with the Mooney viscosity of 32 and the second brominated butyl rubber with the Mooney viscosity of 46 for compounding, wherein the first brominated butyl rubber with