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Formula of inner rubber layer of low-temperature resistant fuel oil rubber tube

A technology of fuel hose and inner rubber layer, which is applied in the direction of hoses, pipes, pipes/pipe joints/fittings, etc., and can solve the problems of poor cold resistance and low temperature resistance

Inactive Publication Date: 2010-06-09
TIANJIN PENGYI GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to its own composition and structural characteristics, this elastomer has many excellent properties such as high temperature resistance, fuel resistance, solvent resistance, hydraulic medium resistance, acid resistance, and alkali resistance, but its cold resistance is poor. With the increase of fluorine content, its The oil resistance is also enhanced accordingly, but the low temperature resistance will become worse and worse

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Fluorine rubber (FKM) 90 parts,

[0016] Copolyether rubber 10 parts,

[0017] Semi-reinforcing carbon black (N774) 15 parts,

[0018] Magnesium oxide 3 parts,

[0019] 3 parts calcium hydroxide,

[0020] No. 3 vulcanizing agent 2 parts,

[0021] 0.3 parts of thiourea (accelerator NA-22),

[0022] 2 parts of bis(2-ethylethyl) adipate (DOA).

Embodiment 2

[0024] Fluorine rubber (FKM) 80 parts,

[0025] Copolyether rubber 20 parts,

[0026] Semi-reinforcing carbon black (N774) 22.5 parts,

[0027] 4.5 parts of magnesium oxide,

[0028] 4.5 parts of calcium hydroxide,

[0029] No. 3 vulcanizing agent 3.5 parts,

[0030] 0.65 parts of thiourea (accelerator NA-22),

[0031] 3.5 parts of bis(2-ethylethyl) adipate (DOA).

Embodiment 3

[0033] Fluorine rubber (FKM) 70 parts,

[0034] Copolyether rubber 30 parts,

[0035] 30 parts of semi-reinforcing carbon black (N774),

[0036] 6 parts of magnesium oxide,

[0037] Calcium hydroxide 6 parts,

[0038] No. 3 vulcanizing agent 5 parts,

[0039] 1 part of hexylenethiourea (accelerator NA-22),

[0040] 5 parts of bis(2-ethylethyl) adipate (DOA).

[0041] By adding copolyether chloride rubber and bis(2-ethyl ethyl) adipate (DOA) to the formula, its cold resistance performance has been greatly improved. With the increase of the amount of these two materials, the cold resistance performance shows an upward trend.

[0042] serial number

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Abstract

The invention relates to a formula of an inner rubber layer of a low-temperature resistant fuel oil rubber tube. The inner rubber layer comprises the following components in part by mass: fluororubber 70-90, epichlorohydrin copolymer 10-30, semi-reinforcing purpose furnace black 15-30, magnesium oxide 3-6, calcium hydroxide 3-6, No.3 vulcanizer 2-5, 2-imidazolidinethione 0.3-1, adipic acid bis(2-ethylhexyl) ester 2-5. The main material of the inner rubber layer of the invention is the fluororubber and the epichlorohydrin copolymer. After adding the epichlorohydrin copolymer and the adipic acid bis(2- ethylhexyl) ester (DOA), the cold resistance is greatly improved, and high rubber elasticity is still maintained in a low-temperature environment.

Description

technical field [0001] The invention relates to the technical field of rubber hoses, in particular to the formula of an inner rubber layer of a low-temperature-resistant fuel rubber hose. Background technique [0002] The low temperature resistant fuel hose is mainly used in automobile engines to transport fuel. It is suitable for use in cold and harsh conditions. Bonding with the outer layer), skeleton layer (used to support the pipe body and enhance the pressure bearing capacity of the pipe), outer rubber layer (heat resistant, sunlight, ozone and other aging, mainly for protection). At present, the fuel hose generally uses fluororubber as the inner layer. The carbon atoms in the main chain or side chain of this material contain fluorine atoms and are a type of synthetic polymer elastomer that can be vulcanized. Due to its own composition and structural characteristics, this elastomer has many excellent properties such as high temperature resistance, fuel resistance, solv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L27/12C08L71/03C08K13/02C08K3/04C08K3/22C08K5/405C08K5/11F16L11/04
Inventor 张洪起张学震
Owner TIANJIN PENGYI GRP CO LTD
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