CN103013009A - Rocker cover gasket rubber compound and preparation method thereof - Google Patents

Abstract

The invention discloses a rocker cover gasket rubber compound which is prepared from the following raw materials based on weight: 40-50 parts of acrylate rubber, 30-40 parts of chlorosulfonated polyethylene elastomer, 14-16 parts of fluorine rubber, 1-2 parts of ferrocene, 1-2 parts of accelerator ammonium persulfate, 5-6 parts of ABS (acrylonitrile butadiene styrene) high powder, 10-20 parts of carbon black N339, 10-20 parts of precipitated silica, 5-7 parts of alumina, 2-4 of molybdenum disulfide, 2-4 parts of barium sulfate, 5-7 parts of bentonite, 10-13 parts of modified iron tailings powder, 9-11 parts of modified wood ash, 4-6 parts of zinc oxide, 1-2 parts of ECHO. A thiadiazole derivative, 7-9 parts of bisphenol A, 1-2 parts of isocyanate, 1-2 parts of 2-mercaptobenzimidazole, 1-2 parts of antioxidant TPPD, 1-2 parts of antioxidant MB, 1-3 parts of titanate coupling agent TMC-TTS, 0.5-1 part of butyl stearate and 19-21 parts of dibutyl phthalate (DBP). The rubber compound disclosed by the invention has excellent ozone resistance and low-temperature resistance, and heat resistance, wide use temperature range and environment-friendly technology, and can be used for manufacturing a variety of sealing gaskets.

Description

A kind of rocker cover pad sizing material and preparation method thereof

Technical field

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

Background technology

Automobile plays great role with rubber component to the riding stability of the vibrationproof of automobile, noise abatement, raising vehicle and riding comfort etc.The conventional rubber material usage of automobile is larger, but along with engine in recent years is tending towards high-power, miniaturization development, envrionment temperature around the engine raises, exhaust control laws and regulations requirement is stricter, the in addition 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, automobile will be to the special gelatin future development with premium properties with the glue kind of rubber.

Acrylic elastomer (hereinafter to be referred as ACM) is the elastomerics that gets through copolymerization take acrylate as main monomer, and its main chain is saturated carbon chains, and side group is the polarity ester group.Because special construction gives its many excellences, such as heat-resisting, ageing-resistant, oil resistant, anti-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, the oil resistant environment, become automotive industry in recent years and focus on a kind of sealing material of develop and spread, especially for the high temperature resistant oil sealing of automobile, bent axle, valve rod, head gasket, hydraulic oil pipeline etc., at present domestic needs is whole dependence on import almost.

Cause engine room temperature rise, the envrionment temperature of auto parts machinery usually will reach more than 150 ℃ even 180 ℃ because car speed improves, the ACM rubber that therefore how to obtain using for a long time in the higher temperature environment becomes the focus that industry is paid close attention to.In order to give prominence to or improve the processing characteristics of ACM, in recent years ACM is carried out modification or selects ACM to one of other elastomer-modified study hotspots that become 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 it is satisfactory that its sealing property is difficult to, and works out the trend that high performance rubber unvulcanizate becomes present domestic rubber industry development.

Summary of the invention

The invention provides a kind of rocker cover pad sizing material and preparation method thereof, sizing material of the present invention has excellent high-low temperature resistant, oil resistant, anti-solvent and chemical resistance, simultaneously good mechanical property.

The present invention adopts following technical scheme:

A kind of rocker cover pad sizing material is made by following raw materials in part by weight: acrylic elastomer 40-50, chlorosulfonated polyethylene elastomer 30-40, viton 14-16, ferrocene 1-2, promotor ammonium persulphate 1-2, ABS high glue powder 5-6, carbon black N339 10-20, precipitated silica 10-20, aluminum oxide 5-7, molybdenumdisulphide 2-4, barium sulfate 2-4, wilkinite 5-7, Modified Iron mine tailing ground-slag 10-13, modification trees ash 9-11, zinc oxide 4-6, ECHO.A thiadiazoles derivative 1-2, dihydroxyphenyl propane 7-9, isocyanic ester 1-2,2-thiol group benzimidazolyl 1-2, anti-aging agent TPPD 1-2, antioxidant MB 1-2, titanate coupling agent TMC-TTS1-3, butyl stearate 0.5-1, dibutyl phthalate (DBP) 19-21.

Described a kind of rocker cover pad sizing material, it is characterized in that, made by following raw materials in part by weight: acrylic elastomer 45, chlorosulfonated polyethylene elastomer 35, viton 15, ferrocene 1.5, promotor ammonium persulphate 1.5, ABS high glue powder 5.5, carbon black N33915, precipitated silica 18, aluminum oxide 6, molybdenumdisulphide 3, barium sulfate 3, wilkinite 6, Modified Iron mine tailing ground-slag 12, modification trees ash 10, zinc oxide 5, ECHO.A thiadiazoles derivative 1.5, dihydroxyphenyl propane 6, isocyanic ester 1.5,2-thiol group benzimidazolyl 1.5, anti-aging agent TPPD 1.5, antioxidant MB 1.5, titanate coupling agent TMC-TTS 2, butyl stearate 0.7, dibutyl phthalate (DBP) 20.

The preparation method of described a kind of rocker cover pad sizing material is characterized in that, may further comprise the steps:

(1) preparation method of modification trees ash:

Use the immersion of 10-15% sodium hydroxide solution after 3-4 hour the trees ash, pull out, dry under temperature 40-45 ℃ to water content 2-3%, then adding immediately trees ash gross weight 3-4% glycerol glycerinate mixes, then, add the two hard esteramides of ethylene group of trees ash gross weight 1-3%, the carboxymethyl cellulose of 1-3%, high-speed mixing, oven dry, grind into powder obtain modification trees ash;

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

With iron tailings 900-1000 ℃ lower scaling loss 4-6 hour, then grind to form nanometer powder, the sorbester p18 agitating of sodium lignosulfonate, 1-2% of admixing again the sec.-propyl distearyl acyl-oxygen base Aluminate that is equivalent to powder weight 1-2%, 1-2% is even, oven dry, grind to form nanometer powder, obtain Modified Iron mine tailing ground-slag;

(3) press 1:1 mass ratio dilution titanate coupling agent TMC-TTS with machine oil;

(4) pressing formula rate drops into modification trees ashes, carbon black N339, precipitated silica, aluminum oxide in the high-speed mixer, speed high-speed stirring with 1000-1200 rev/min, the coupling agent that step (2) dilution is good is sprayed onto in the mixed fillers simultaneously, continue to stir 5-6 minute, the discharging cooling is for subsequent use, obtains mixture;

(5) with acrylic elastomer, chlorosulfonated polyethylene elastomer, viton, Modified Iron mine tailing ground-slag, drop in the Banbury mixer, under 60-70 ℃ temperature, plasticate, after plasticating 10-12 minute, when temperature reaches 85-95 ℃, begin discharge, park cooling 10-12 hour behind the discharge;

(6) by formula rate above-mentioned cooled broken-(down)rubber is joined in the Banbury mixer, the compound that adds again step (4), after mixing 2-3 minute, after the mixing 10-15 of other leftover materials minute during adding is filled a prescription again except vulcanizing agent and promotor class, when temperature reaches 90-128 ℃, the beginning discharge is parked cooling 12-14 hour behind the discharge;

(7) above-mentioned mixing materials is dropped in the mill, vulcanizing agent, promotor class are added in the rubber unvulcanizate again, thin-pass 4-5 is all over getting final product, the processing temperature of mill≤56 ℃.

Beneficial effect

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

Embodiment

A kind of preparation of rocker cover pad sizing material,

Take by weighing acrylic elastomer (AR-100) 45kg, chlorosulfonated polyethylene elastomer 35kg, viton 15kg, ferrocene 1.5kg, promotor ammonium persulphate 1.5kg, ABS high glue powder 5.5kg, carbon black N33915kg, precipitated silica 18kg, aluminum oxide 6kg, molybdenumdisulphide 3kg, barium sulfate 3 kg, wilkinite 6 kg, Modified Iron mine tailing ground-slag 12 kg, modification trees ash 10 kg, zinc oxide 5 kg, ECHO.A thiadiazoles derivative 1.5 kg, dihydroxyphenyl propane 6 kg, isocyanic ester 1.5kg, 2-thiol group benzimidazolyl 1.5 kg, anti-aging agent TPPD 1.5 kg, antioxidant MB 1.5 kg, titanate coupling agent TMC-TTS 2 kg, butyl stearate 0.7 kg, dibutyl phthalate (DBP) 20 kg

The preparation method may further comprise the steps:

(1) preparation method of modification trees ash:

Use the immersion of 10-15% sodium hydroxide solution after 3-4 hour the trees ash, pull out, dry under temperature 40-45 ℃ to water content 2-3%, then adding immediately trees ash gross weight 3-4% glycerol glycerinate mixes, then, add the two hard esteramides of ethylene group of trees ash gross weight 1-3%, the carboxymethyl cellulose of 1-3%, high-speed mixing, oven dry, grind into powder obtain modification trees ash;

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

With iron tailings 900-1000 ℃ lower scaling loss 4-6 hour, then grind to form nanometer powder, the sorbester p18 agitating of sodium lignosulfonate, 1-2% of admixing again the sec.-propyl distearyl acyl-oxygen base Aluminate that is equivalent to powder weight 1-2%, 1-2% is even, oven dry, grind to form nanometer powder, obtain Modified Iron mine tailing ground-slag;

(3) press 1:1 mass ratio dilution titanate coupling agent TMC-TTS with machine oil;

(4) pressing formula rate drops into modification trees ashes, carbon black N339, precipitated silica, aluminum oxide in the high-speed mixer, speed high-speed stirring with 1000-1200 rev/min, the coupling agent that step (2) dilution is good is sprayed onto in the mixed fillers simultaneously, continue to stir 5-6 minute, the discharging cooling is for subsequent use, obtains mixture;

(5) with acrylic elastomer, chlorosulfonated polyethylene elastomer, viton, Modified Iron mine tailing ground-slag, drop in the Banbury mixer, under 60-70 ℃ temperature, plasticate, after plasticating 10-12 minute, when temperature reaches 85-95 ℃, begin discharge, park cooling 10-12 hour behind the discharge;

(6) by formula rate above-mentioned cooled broken-(down)rubber is joined in the Banbury mixer, the compound that adds again step (4), after mixing 2-3 minute, after the mixing 10-15 of other leftover materials minute during adding is filled a prescription again except vulcanizing agent and promotor class, when temperature reaches 90-128 ℃, the beginning discharge is parked cooling 12-14 hour behind the discharge;

(7) above-mentioned mixing materials is dropped in the mill, vulcanizing agent, promotor class are added in the rubber unvulcanizate again, thin-pass 4-5 is all over getting final product, the processing temperature of mill≤56 ℃.

Experimental data

Make the sizing material detection that makes a service test by the formula for raw stock of embodiment, detected result sees Table 1.

Table 1

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

Claims (3)

1. rocker cover pad sizing material, it is characterized in that, made by following raw materials in part by weight: acrylic elastomer 40-50, chlorosulfonated polyethylene elastomer 30-40, viton 14-16, ferrocene 1-2, promotor ammonium persulphate 1-2, ABS high glue powder 5-6, carbon black N339 10-20, precipitated silica 10-20, aluminum oxide 5-7, molybdenumdisulphide 2-4, barium sulfate 2-4, wilkinite 5-7, Modified Iron mine tailing ground-slag 10-13, modification trees ash 9-11, zinc oxide 4-6, ECHO.A thiadiazoles derivative 1-2, dihydroxyphenyl propane 7-9, isocyanic ester 1-2,2-thiol group benzimidazolyl 1-2, anti-aging agent TPPD 1-2, antioxidant MB 1-2, titanate coupling agent TMC-TTS1-3, butyl stearate 0.5-1, dibutyl phthalate (DBP) 19-21.

2. a kind of rocker cover pad sizing material according to claim 1, it is characterized in that, made by following raw materials in part by weight: acrylic elastomer 45, chlorosulfonated polyethylene elastomer 35, viton 15, ferrocene 1.5, promotor ammonium persulphate 1.5, ABS high glue powder 5.5, carbon black N33915, precipitated silica 18, aluminum oxide 6, molybdenumdisulphide 3, barium sulfate 3, wilkinite 6, Modified Iron mine tailing ground-slag 12, modification trees ash 10, zinc oxide 5, ECHO.A thiadiazoles derivative 1.5, dihydroxyphenyl propane 6, isocyanic ester 1.5,2-thiol group benzimidazolyl 1.5, anti-aging agent TPPD 1.5, antioxidant MB 1.5, titanate coupling agent TMC-TTS 2, butyl stearate 0.7, dibutyl phthalate (DBP) 20.

3. the preparation method of a kind of rocker cover pad sizing material according to claim 1 and 2 is characterized in that, may further comprise the steps:

(1) preparation method of modification trees ash:

Use the immersion of 10-15% sodium hydroxide solution after 3-4 hour the trees ash, pull out, dry under temperature 40-45 ℃ to water content 2-3%, then adding immediately trees ash gross weight 3-4% glycerol glycerinate mixes, then, add the two hard esteramides of ethylene group of trees ash gross weight 1-3%, the carboxymethyl cellulose of 1-3%, high-speed mixing, oven dry, grind into powder obtain modification trees ash;

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

With iron tailings 900-1000 ℃ lower scaling loss 4-6 hour, then grind to form nanometer powder, the sorbester p18 agitating of sodium lignosulfonate, 1-2% of admixing again the sec.-propyl distearyl acyl-oxygen base Aluminate that is equivalent to powder weight 1-2%, 1-2% is even, oven dry, grind to form nanometer powder, obtain Modified Iron mine tailing ground-slag;

(3) press 1:1 mass ratio dilution titanate coupling agent TMC-TTS with machine oil;

(4) pressing formula rate drops into modification trees ashes, carbon black N339, precipitated silica, aluminum oxide in the high-speed mixer, speed high-speed stirring with 1000-1200 rev/min, the coupling agent that step (2) dilution is good is sprayed onto in the mixed fillers simultaneously, continue to stir 5-6 minute, the discharging cooling is for subsequent use, obtains mixture;

(5) with acrylic elastomer, chlorosulfonated polyethylene elastomer, viton, Modified Iron mine tailing ground-slag, drop in the Banbury mixer, under 60-70 ℃ temperature, plasticate, after plasticating 10-12 minute, when temperature reaches 85-95 ℃, begin discharge, park cooling 10-12 hour behind the discharge;

(6) by formula rate above-mentioned cooled broken-(down)rubber is joined in the Banbury mixer, the compound that adds again step (4), after mixing 2-3 minute, after the mixing 10-15 of other leftover materials minute during adding is filled a prescription again except vulcanizing agent and promotor class, when temperature reaches 90-128 ℃, the beginning discharge is parked cooling 12-14 hour behind the discharge;

(7) above-mentioned mixing materials is dropped in the mill, vulcanizing agent, promotor class are added in the rubber unvulcanizate again, thin-pass 4-5 is all over getting final product, the processing temperature of mill≤56 ℃.