Automobile rubber sealing strip and preparation method thereof

A rubber sealing strip and automobile technology, applied in the field of automobile rubber parts, can solve the problems of poor compatibility and slow vulcanization speed, and achieve the effects of simple process, reduced energy consumption, and satisfactory heat aging resistance

Inactive Publication Date: 2015-12-02
SUZHOU GOODTIME TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Purpose of the invention: In view of the defects that the EPDM sealing strips in the prior art cannot have both mechanical properties and high temperature resistance, low temperature resistance and light, heat and oxygen stability, slow vulcanization speed and poor compatibility, The invention provides an automobile rubber sealing strip, which improves its low temperature resistance, high temperature resistance, light resistance, anti-aging and anti-oxidation and anti-ultraviolet properties on the basis of maintaining the original mechanical properties, and improves the comprehensive performance of the sealing strip; Compatibility of components in the seal

Method used

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  • Automobile rubber sealing strip and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A rubber sealing strip for automobiles, consisting of the following components in parts by weight:

[0035] 55 parts of EPDM rubber, 8 parts of carbon black, 2 parts of zinc oxide, 2 parts of stearic acid, 5 parts of anti-aging agent 4010NA, 1 part of anti-ultraviolet agent, 3 parts of naphthenic oil, N, N'- m-phenylene bis 8 parts of maleimide, 4 parts of 2-mercaptobenzothiazole, 2 parts of dilauryl thiodipropionate, 2.5 parts of paraffin oil, γ-(methacryloyloxy)propyltrimethoxysilane 1 part, 5 parts of calcium carbonate, 1.5 parts of anti-scorch agent CTP.

[0036] Add the above components into the internal mixer for mixing, and the obtained mixed rubber is then tested for hardness, tensile strength, and elongation at break. Among them, the hardness of the mixed rubber reaches 73 degrees, and the tensile strength reaches 8.5Mpa. , the elongation at break reaches 320%;

[0037] Put the above-mentioned compounded rubber into a mold for thermal kneading and molding, an...

Embodiment 2

[0039] A rubber sealing strip for automobiles, consisting of the following components in parts by weight:

[0040] 60 parts of EPDM rubber, 8 parts of carbon black, 2 parts of zinc oxide, 2 parts of stearic acid, 40204 parts of anti-aging agent, 1 part of anti-ultraviolet agent, 2 parts of naphthenic oil, N-tert-butyl-2-benzene 7 parts of thiazole sulfenamide, 4 parts of zinc dimethyl dithiocarbamate, 2 parts of α-tocopherol, 2 parts of paraffin oil, 1 part of γ-(methacryloyloxy)propyl trimethoxysilane, 4 parts of calcium carbonate, 1 part of anti-scorch agent CTP.

[0041] Add the above components into the internal mixer for mixing, and the obtained mixed rubber is then tested for hardness, tensile strength, and elongation at break. The hardness of the mixed rubber reaches 77 degrees, and the tensile strength reaches 9Mpa. The elongation at break reaches 430%;

[0042] Put the above-mentioned compounded rubber in a mold for heat kneading and molding, and then place the mold...

Embodiment 3

[0044] A rubber sealing strip for automobiles, consisting of the following components in parts by weight:

[0045] 65 parts of EPDM rubber, 8 parts of carbon black, 2 parts of zinc oxide, 1.5 parts of stearic acid, 3 parts of anti-aging agent NB, 0.5 parts of anti-ultraviolet agent, 3 parts of naphthenic oil, N-tert-butyl-2-benzene 6 parts of thiazole sulfenamide, 2 parts of tellurium diethyldithiocarbamate, 2 parts of α-tocopherol, 2 parts of paraffin oil, 0.5 part of γ-(methacryloyloxy)propyltrimethoxysilane, 3 parts of light alumina, 1.5 parts of anti-scorch agent CTP.

[0046] Add the above components into the internal mixer for mixing, and the obtained mixed rubber is then tested for hardness, tensile strength, and elongation at break. The hardness of the mixed rubber reaches 75 degrees, and the tensile strength reaches 8.8Mpa. , the elongation at break reaches 450%;

[0047] Put the above-mentioned compounded rubber into a mold for thermal kneading and molding, and the...

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Abstract

The invention discloses an automobile rubber sealing strip and a preparation method thereof. The automobile rubber sealing strip comprises the following components in parts by weight: 55-80 parts of ethylene propylene diene monomer rubber, 4.5-8 parts of carbon black, 0.5-2 parts of zinc oxide, 1-2 parts of stearic acid, 3-5 parts of anti-aging agent, 0.5-1 part of ultraviolet-resistant agent, 1.5-3 parts of naphthenic oil, 3-8 parts of vulcanizing agent, 1.5-4 parts of accelerator, 1-2 parts of antioxidant, 1-2.5 parts of paraffin oil, 0.5-1 part of gamma-(methylacryloyloxy)propyltrimethoxy silane, 1.5-5 parts of filler and 0.5-1.5 parts of anti-scorching agent CTP. The automobile rubber sealing strip enhances the high temperature resistance, low temperature resistance, stability to light, ozone. oxygen and the like and other comprehensive properties of the product and improves the interface compatibility on the premise of keeping the original mechanical properties. The preparation method has the advantages of simple technique, short vulcanization time, lower energy consumption and lower production cost.

Description

technical field [0001] The invention relates to the field of automobile rubber parts, in particular to an automobile rubber sealing strip and a preparation method thereof. Background technique [0002] Airtightness is an important indicator of the quality of the entire vehicle. Automobile sealing strips are one of the important parts that determine the airtightness of automobiles. The materials of automobile sealing strips are mainly polyvinyl chloride, EPDM rubber, silicone rubber and thermoplastic elastic Body, etc., among which EPDM is the most commonly used material. The sealing strip made of EPDM rubber has a variety of formulas. The mechanical properties of EPDM rubber sealing strip are good, but in low temperature environment, the brittle temperature of sealing strip is low, and under high temperature condition, the mechanical properties decrease; The vulcanization speed of rubber is slow, self-adhesive and mutual-adhesive are poor, and the compatibility with other c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/16C08L91/00C08L91/06C08K3/04C08K3/22C08K5/09C08K5/18C08K5/3415C08K5/47C08K5/372C08K5/5425C08K3/26
CPCC08L23/16C08L2201/08C08L2205/03C08L91/00C08L91/06C08K3/04C08K2003/2296C08K5/09C08K5/18C08K5/3415C08K5/47C08K5/372C08K5/5425C08K2003/265
Inventor 周波
Owner SUZHOU GOODTIME TECH DEV
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