CN103013007B - Rubber compound for rear oil seal of automobile crankshaft and preparation method of rubber - Google Patents

Abstract

The invention discloses a rubber compound for a rear oil seal of an automobile crankshaft. The rubber compound comprises the following raw materials by weight: 54 to 56 parts of acrylic rubber, 34 to 36 parts of neoprene A-90 (DENKA), 8 to 11 parts of ethylene propylene diene monomer 3950 (LANXESS), 3 to 5 parts of bisphenol A polycarbonate, 20 to 22 parts of super wear-resisting carbon black N330, 5 to 15 parts of carbon black N660, 4 to 6 parts of carbon fiber, 5 to 10 parts of wollastonite in powder, 5 to 7 parts of barium sulfate, 4 to 6 parts of talcum powder, 4 to 6 parts of celestite, 9 to 11 parts of modified iron tailings powder, 0.5 to 1 part of vulcanizing agent DCP, 0.5 to 1 part of accelerant CZ, 1 to 3 parts of zinc oxide, 0.2 to 0.4 part of scorch retarder CTP, 1 to 2 parts of 2-thiol benzimidazole, 1 to 2 parts of antioxidant NBC1, 2 to 3 parts of bis(P,P-bis-ethylhexyl diphosphato) ethanediolato titanate, and 16 to 18 parts of vanay. The rubber compound is excellent in ozone resistance, low-temperature resistance and heat resistance, wide in operating temperature range and environment-friendly in process, and can be used for manufacturing various seal components.

Description

A kind of Rubber compound for rear oil seal of automobile crankshaft sizing material and preparation method thereof

Technical field

The present invention relates to synthetic rubber field, be specifically related to a kind of car-valve gasket sizing material and preparation method thereof.

Background technology

The riding stability and riding comfort etc. of automobile rubber component to the vibrationproof of automobile, noise abatement, raising vehicle play great role.The conventional rubber material usage of automobile is larger, but along with engine be in recent years tending towards high-power, miniaturization development, the envrionment temperature of engine environment raises, gas exhaust inspecting laws and regulations requirement is stricter, in addition the use of alcohol fuel, forces rubber component to improve heat-resisting, cold-resistant, oil resistant, the properties such as ageing-resistant.So the elastomeric consumption of high-performance special constantly increases, automobile is the principal market of these special synthetic rubbers.Therefore, the glue kind of automobile rubber is by the special gelatin future development with premium properties.

Acrylic elastomer (hereinafter referred to as ACM) take acrylate as the elastomerics that main monomer obtains through copolymerization, and its main chain is saturated carbon chains, and side base is polar ester groups.Because its many excellence given by special construction, as heat-resisting, ageing-resistant, oil resistant, resistance to ozone, uvioresistant etc., mechanical property and processing characteristics are better than viton and silicon rubber, and it is heat-resisting, ageing resistance and oil-proofness are better than paracril.ACM is widely used in various high temperature, resistance to oil environment, become a kind of sealing material that automotive industry in recent years focuses on develop and spread, especially for the high temperature resistant oil sealing, bent axle, valve rod, head gasket, hydraulic oil pipeline etc. of automobile, current domestic needs is whole dependence on import almost.

Cause engine room temperature rise because car speed improves, the envrionment temperature of auto parts machinery will reach 150 DEG C even more than 180 DEG C usually, therefore how to obtain the focus that the ACM rubber that can use in higher temperature environment for a long time becomes industry concern.In order to give prominence to or improve the processing characteristics of ACM, in recent years modification carried out to ACM or select ACM to one of other elastomer-modified study hotspots becoming processed and applied.Existing rubber seal is under the operating modes such as high temperature, low temperature, the large temperature difference, corrosive medium and long lifetime, and its sealing property is difficult to satisfactory, works out the trend that high performance rubber unvulcanizate becomes current domestic rubber industry development.

Summary of the invention

The invention provides a kind of Rubber compound for rear oil seal of automobile crankshaft sizing material and preparation method thereof, sizing material of the present invention has excellent high-low temperature resistant, oil resistant, solvent resistant and chemical resistance, simultaneously good mechanical property.

The present invention adopts following technical scheme:

A kind of Rubber compound for rear oil seal of automobile crankshaft sizing material, be made up of following raw materials in part by weight: acrylic elastomer 54-56, chloroprene rubber A-90(NEC chemistry) 34-36, the bright Sheng of terpolymer EP rubber 3950(Germany) 8-11, bisphenol A polycarbonate 3-5, high abrasion furnace carbon black N330 20-22, carbon black N660 5-15, carbon fiber 4-6, wollastonite powder 5-10, barium sulfate 5-7, talcum powder 4-6, lazurite 4-6, Modified Iron mine tailing ground-slag 9-11, vulcanizing agent DCP 0.5 ~ 1, accelerant CZ 0.5-1, zinc oxide 1-3, anti-scorching agent CTP 0.2-0.4, 2-thiol group benzimidazolyl 1-2, antioxidant NBC 1-2, Di(dioctylpyrophosphato) ethylene titanate 2-3, Vanay 16-18.

Described a kind of Rubber compound for rear oil seal of automobile crankshaft sizing material, it is characterized in that, be made up of following raw materials in part by weight: acrylic elastomer 55, chloroprene rubber A-90(NEC chemistry) 35, the bright Sheng of terpolymer EP rubber 3950(Germany) 10, bisphenol A polycarbonate 4, high abrasion furnace carbon black N330 21, carbon black N66012, carbon fiber 5, wollastonite powder 8, barium sulfate 6, talcum powder 5, lazurite 5, Modified Iron mine tailing ground-slag 10, vulcanizing agent DCP 0.7, accelerant CZ 0.3, zinc oxide 2, anti-scorching agent CTP 0.3, 2-thiol group benzimidazolyl 1.3, antioxidant NBC 1.6, Di(dioctylpyrophosphato) ethylene titanate 2.4, Vanay 17.

The preparation method of described a kind of Rubber compound for rear oil seal of automobile crankshaft sizing material, is characterized in that, comprise the following steps:

(1) preparation method of modification tree ash:

The sericite-tridymite-cristobalite of tree ash weight 1-2% is joined in tree ash and mixes, with 15-20% salt acid soak 1-2 hour, wash with water to neutrality, after oven dry, add the trisodium phosphate of titanate coupling agent TMC-TTS, the 1-2% being equivalent to solid weight 0.5-1.0%, 1-2% isooctyl phenyl Soxylat A 25-7,3-5% magnesium hydroxide, with the speed high-speed stirring of 1200-1500 rev/min, obtain dispersion liquid, dispersion liquid is dried, is ground into powder, obtains modification tree ash;

(2) preparation of Modified Iron mine tailing ground-slag:

By scaling loss 4-6 hour at iron tailings 900-1000 DEG C, then grind to form nanometer powder, then it is even to admix the molybdenum oxide, the sodium lignosulfonate of 1-2%, the 1-2% machine oil agitating that are equivalent to powder weight 1-2%, dries, grind to form nanometer powder, obtain Modified Iron mine tailing ground-slag;

(3) 1:1 mass ratio dilution Di(dioctylpyrophosphato) ethylene titanate is pressed with machine oil;

(4) by formula rate by modification tree ash, high abrasion furnace carbon black N330, carbon black N660, drop in high-speed mixer, with the speed high-speed stirring of 1000-1200 rev/min, the coupling agent that step (2) has been diluted is sprayed onto in mixed fillers simultaneously, continue to stir 5-6 minute, discharging cooling is for subsequent use, obtains mixture;

(5) by acrylic elastomer, chloroprene rubber A-90(NEC chemistry), terpolymer EP rubber 3950(Germany bright Sheng), Modified Iron mine tailing ground-slag, drop in Banbury mixer, plasticate at the temperature of 63-72 DEG C, after plasticating 10-14 minute, when temperature reaches 82-95 DEG C, start discharge, after discharge, park cooling 10-12 hour;

(6) by formula rate, above-mentioned cooled broken-(down)rubber is joined in Banbury mixer, add the compound of step (4) again, after mixing 2-3 minute, after adding the mixing 10-15 of other leftover materials minute in formula beyond sulphur removal agent and promotor class again, when temperature reaches 90-128 DEG C, start discharge, after discharge, park cooling 12-14 hour;

(7) above-mentioned mixing materials is dropped in mill, then vulcanizing agent, promotor class are added in rubber unvulcanizate, thin-pass 6-8 time, processing temperature≤56 DEG C of mill.

Beneficial effect

The present invention is by acrylic elastomer and other several compounding rubber, improve the over-all properties of rubber unvulcanizate, tree ash is improved, tail iron ore is carried out modification simultaneously, then mix with carbon black, use coupling agent treatment again, use as strengthening agent, improve the dispersiveness of filler at rubber unvulcanizate, improve ozone resistance and the resistance to low temperature of rubber unvulcanizate, resistance toheat, than acrylic elastomer itself and butadiene-acrylonitrile rubber, there is wider use temperature scope simultaneously, better processing performance, lower starting material and production cost, meet the performance requriements of production domesticization component.

Embodiment

A preparation for Rubber compound for rear oil seal of automobile crankshaft sizing material,

Take acrylic elastomer (AR-100) 55kg, chloroprene rubber A-90(NEC chemistry) 35kg, the bright Sheng of terpolymer EP rubber 3950(Germany) 10kg, bisphenol A polycarbonate 4kg, high abrasion furnace carbon black N330 21kg, carbon black N660 12kg, carbon fiber 5kg, wollastonite powder 8kg, barium sulfate 6kg, talcum powder 5kg, lazurite 5kg, Modified Iron mine tailing ground-slag 10kg, vulcanizing agent DCP 0.7kg, accelerant CZ 0.3kg, zinc oxide 2kg, anti-scorching agent CTP 0.3kg, 2-thiol group benzimidazolyl 1.3kg, antioxidant NBC 1.6kg, Di(dioctylpyrophosphato) ethylene titanate 2.4kg, Vanay 17kg.

Preparation method comprises the following steps:

(1) preparation method of modification tree ash:

The sericite-tridymite-cristobalite of tree ash weight 1-2% is joined in tree ash and mixes, with 15-20% salt acid soak 1-2 hour, wash with water to neutrality, after oven dry, add the trisodium phosphate of titanate coupling agent TMC-TTS, the 1-2% being equivalent to solid weight 0.5-1.0%, 1-2% isooctyl phenyl Soxylat A 25-7,3-5% magnesium hydroxide, with the speed high-speed stirring of 1200-1500 rev/min, obtain dispersion liquid, dispersion liquid is dried, is ground into powder, obtains modification tree ash;

(2) preparation of Modified Iron mine tailing ground-slag:

By scaling loss 4-6 hour at iron tailings 900-1000 DEG C, then grind to form nanometer powder, then it is even to admix the molybdenum oxide, the sodium lignosulfonate of 1-2%, the 1-2% machine oil agitating that are equivalent to powder weight 1-2%, dries, grind to form nanometer powder, obtain Modified Iron mine tailing ground-slag;

(3) 1:1 mass ratio dilution Di(dioctylpyrophosphato) ethylene titanate is pressed with machine oil;

(4) by formula rate by modification tree ash, high abrasion furnace carbon black N330, carbon black N660, drop in high-speed mixer, with the speed high-speed stirring of 1000-1200 rev/min, the coupling agent that step (2) has been diluted is sprayed onto in mixed fillers simultaneously, continue to stir 5-6 minute, discharging cooling is for subsequent use, obtains mixture;

(5) by acrylic elastomer, chloroprene rubber A-90(NEC chemistry), terpolymer EP rubber 3950(Germany bright Sheng), Modified Iron mine tailing ground-slag, drop in Banbury mixer, plasticate at the temperature of 63-72 DEG C, after plasticating 10-14 minute, when temperature reaches 82-95 DEG C, start discharge, after discharge, park cooling 10-12 hour;

(6) by formula rate, above-mentioned cooled broken-(down)rubber is joined in Banbury mixer, add the compound of step (4) again, after mixing 2-3 minute, after adding the mixing 10-15 of other leftover materials minute in formula beyond sulphur removal agent and promotor class again, when temperature reaches 90-128 DEG C, start discharge, after discharge, park cooling 12-14 hour;

(7) above-mentioned mixing materials is dropped in mill, then vulcanizing agent, promotor class are added in rubber unvulcanizate, thin-pass 6-8 time, processing temperature≤56 DEG C of mill.

Experimental data

Make sizing material by the formula for raw stock of embodiment to make a service test detection, detected result is in table 1.

Table 1

The lower temperature resistance of sizing material of the present invention, resistance toheat and resistance to tearing are all good than conventional gaskets material as can be seen from the table, can be used as various sealing member material.

Claims (1)

1. the preparation method of a Rubber compound for rear oil seal of automobile crankshaft sizing material, it is characterized in that, Rubber compound for rear oil seal of automobile crankshaft sizing material is made up of following raw materials in part by weight: acrylic elastomer 54-56, chloroprene rubber A-90(NEC chemistry) 34-36, the bright Sheng of terpolymer EP rubber 3950(Germany) 8-11, bisphenol A polycarbonate 3-5, high abrasion furnace carbon black N330 20-22, carbon black N660 5-15, carbon fiber 4-6, wollastonite powder 5-10, barium sulfate 5-7, talcum powder 4-6, lazurite 4-6, Modified Iron mine tailing ground-slag 9-11, vulcanizing agent DCP 0.5 ~ 1, accelerant CZ 0.5-1, zinc oxide 1-3, anti-scorching agent CTP 0.2-0.4, 2-thiol group benzimidazolyl 1-2, antioxidant NBC 1-2, Di(dioctylpyrophosphato) ethylene titanate 2-3, Vanay 16-18,

The preparation method of this Rubber compound for rear oil seal of automobile crankshaft sizing material, comprises the following steps:

(1) preparation method of modification tree ash:

The sericite-tridymite-cristobalite of tree ash weight 1-2% is joined in tree ash and mixes, with 15-20% salt acid soak 1-2 hour, wash with water to neutrality, after oven dry, add the trisodium phosphate of titanate coupling agent TMC-TTS, the 1-2% being equivalent to solid weight 0.5-1.0%, 1-2% isooctyl phenyl Soxylat A 25-7,3-5% magnesium hydroxide, with the speed high-speed stirring of 1200-1500 rev/min, obtain dispersion liquid, dispersion liquid is dried, is ground into powder, obtains modification tree ash;

(2) preparation of Modified Iron mine tailing ground-slag:

By scaling loss 4-6 hour at iron tailings 900-1000 DEG C, then grind to form nanometer powder, then it is even to admix the molybdenum oxide, the sodium lignosulfonate of 1-2%, the 1-2% machine oil agitating that are equivalent to powder weight 1-2%, dries, grind to form nanometer powder, obtain Modified Iron mine tailing ground-slag;

(3) 1:1 mass ratio dilution Di(dioctylpyrophosphato) ethylene titanate is pressed with machine oil;

(4) by formula rate by modification tree ash, high abrasion furnace carbon black N330, carbon black N660, drop in high-speed mixer, with the speed high-speed stirring of 1000-1200 rev/min, the coupling agent that step (3) has been diluted is sprayed onto in mixed fillers simultaneously, continue to stir 5-6 minute, discharging cooling is for subsequent use, obtains mixture;

(5) by acrylic elastomer, chloroprene rubber A-90(NEC chemistry), terpolymer EP rubber 3950(Germany bright Sheng), Modified Iron mine tailing ground-slag, drop in Banbury mixer, plasticate at the temperature of 63-72 DEG C, after plasticating 10-14 minute, when temperature reaches 82-95 DEG C, start discharge, after discharge, park cooling 10-12 hour;

(6) by formula rate, above-mentioned cooled broken-(down)rubber is joined in Banbury mixer, add the compound of step (4) again, after mixing 2-3 minute, after adding the mixing 10-15 of other leftover materials minute in formula beyond sulphur removal agent and promotor class again, when temperature reaches 90-128 DEG C, start discharge, after discharge, park cooling 12-14 hour;

(7) above-mentioned mixing materials is dropped in mill, then vulcanizing agent, promotor class are added in rubber unvulcanizate, thin-pass 6-8 time, processing temperature≤56 DEG C of mill.