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Expansion joint and preparation method thereof

A technology of expansion joints and raw materials, which is applied in the field of expansion joints and its preparation, can solve the problems of low elongation at break, low impact strength, and low tensile strength of expansion joints, and achieve good mechanical properties

Inactive Publication Date: 2017-04-26
WUXI YONGXING METAL HOSE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] This application aims at the technical problems of low tensile strength, low impact strength, low elongation at break and low bending strength of existing expansion joints, and provides an expansion joint and its preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Weigh 100 parts of butadiene rubber, 40 parts of PVC, 3 parts of tribasic lead sulfate, 1 part of dibasic lead phosphite, 10 parts of ABS, 1.5 parts of cadmium stearate, 2 parts of PMMA, 2 parts of dilaurate 2 parts of butyl ester, 4 parts of zinc borate hydrate, 60 parts of hydrogenated nitrile rubber, 40 parts of NBR, 25 parts of stainless steel metal powder, 1.5 parts of stannous chloride, and 0.3 part of benzoin dimethyl ether.

[0025] Put butadiene rubber, PVC, stainless steel metal powder and stannous chloride into a reaction kettle equipped with a stirrer and a thermometer, raise the temperature to 60°C, stir for 60 minutes, and the stirring speed is 800 rpm.

[0026] Add the remaining raw materials, put them into the kneader, and knead at 80°C for 60min. 0.5m / min.

[0027] Flexural strength 100MPa, Shore hardness 90D, flexural modulus 1.2GPa, impact strength 90kJ / m 3 ; Tear strength 30kN / m, Vicat softening point 140°C, tensile strength 60MPa; 1 day oil resist...

Embodiment 2

[0029] Weigh 100 parts of butadiene rubber, 80 parts of PVC, 7 parts of tribasic lead sulfate, 5 parts of dibasic lead phosphite, 30 parts of ABS, 3.5 parts of cadmium stearate, 8 parts of PMMA, 8 parts of dilaurate 6 parts of butyl ester, 8 parts of zinc borate hydrate, 80 parts of hydrogenated nitrile rubber, 60 parts of NBR, 65 parts of stainless steel metal powder, 5.5 parts of stannous chloride, and 0.7 part of benzoin dimethyl ether.

[0030] Put butadiene rubber, PVC, stainless steel metal powder and stannous chloride into a reaction kettle equipped with a stirrer and a thermometer, raise the temperature to 80°C, stir for 100 minutes, and the stirring speed is 900 rpm.

[0031] Add the remaining raw materials, put them into the kneader, knead at 100°C for 80min, extruder temperature feeding section 180°C, compression section 200°C, metering section 220°C, die temperature 240°C, screw speed 40r / min, traction speed 0.7m / min.

[0032] Flexural strength 105MPa, Shore hardnes...

Embodiment 3

[0034] Weigh 100 parts of butadiene rubber, 50 parts of PVC, 4 parts of tribasic lead sulfate, 2 parts of dibasic lead phosphite, 15 parts of ABS, 2 parts of cadmium stearate, 3 parts of PMMA, 2 parts of dilaurate 3 parts of butyl ester, 5 parts of zinc borate hydrate, 65 parts of hydrogenated nitrile rubber, 45 parts of NBR, 35 parts of stainless steel metal powder, 2.5 parts of stannous chloride, 0.4 part of benzoin dimethyl ether.

[0035] Put butadiene rubber, PVC, stainless steel metal powder and stannous chloride into a reaction kettle equipped with a stirrer and a thermometer, raise the temperature to 80°C, stir for 100 minutes, and the stirring speed is 900 rpm.

[0036] Add the remaining raw materials, put them into the kneader, knead at 100°C for 80min, extruder temperature feeding section 180°C, compression section 200°C, metering section 220°C, die temperature 240°C, screw speed 40r / min, traction speed 0.7m / min.

[0037] Flexural strength 110MPa, Shore hardness 95...

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Abstract

The invention discloses an expansion joint and a preparation method thereof. The expansion joint is prepared from butadiene rubber, PVC, tribasic lead sulfate, dibasic lead sulfate, ABS, cadmium stearate, PMMA, dibutyl laurate, zinc borate hydrate, hydrogenated butadiene-acrylonitrile rubber, NBR, stainless steel powder, stannous chloride and benzoin dimethyl ether. The prepared expansion joint has bending strength of 100 to 120 MPa, Shore hardness of 90 to 100 D, flexural modulus of 1.2 to 1.6 GPa, impact strength of 90 to 110 kJ / m<3>, tearing strength of 30 to 50 kN / m, a Vicat softening point of 140 to 180 DEG C, tensile strength of 60 to 80 MPa, oil resistance of 30 to 50% under the condition of standing at 80 DEG C for one day, elastic modulus of 135 to 175 MPa, elongation at break of 650 to 850%, compression set of 10 to 15% and Young modulus of 440 to 480 MPa.

Description

technical field [0001] The invention relates to the field of pipe materials, in particular to an expansion joint and a preparation method thereof. Background technique [0002] The expansion joint is a flexible structure arranged on the container shell or pipeline to compensate for the additional stress caused by temperature difference and mechanical vibration. As an elastic compensating element that can expand freely, it has the advantages of reliable operation, good performance, and compact structure, and has been widely used in chemical industry, metallurgy, nuclear energy and other departments. [0003] The expansion joint adopts one-time hydraulic forming and mechanical forming technology, and is assisted by computer optimized design and manufacture. It has the advantages of accurate size, clean surface and no trauma, compact product structure, large compensation amount, no leakage, corrosion resistance, long life, easy installation, product Reliable quality and othe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L9/00C08L27/06C08L55/02C08L33/12C08L9/02C08L15/00C08K13/02C08K3/30C08K3/32C08K5/098C08K3/38
CPCC08L9/00C08L2205/02C08L2205/035C08L27/06C08L55/02C08L33/12C08L9/02C08L15/005C08K13/02C08K2003/3045C08K3/32C08K5/098C08K2003/387
Inventor 王志兴
Owner WUXI YONGXING METAL HOSE
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