CN114773520B - Preparation method and application of polymer rubber powder of sealing rubber toughening and reinforcing modifier - Google Patents
Preparation method and application of polymer rubber powder of sealing rubber toughening and reinforcing modifier Download PDFInfo
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- 229920001971 elastomer Polymers 0.000 title claims abstract description 100
- 238000007789 sealing Methods 0.000 title claims abstract description 57
- 229920000642 polymer Polymers 0.000 title claims abstract description 45
- 239000000843 powder Substances 0.000 title claims abstract description 45
- 239000003607 modifier Substances 0.000 title claims abstract description 20
- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 16
- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- 239000000178 monomer Substances 0.000 claims abstract description 34
- 229920002943 EPDM rubber Polymers 0.000 claims abstract description 14
- 229920000459 Nitrile rubber Polymers 0.000 claims abstract description 14
- 238000002156 mixing Methods 0.000 claims abstract description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 11
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 11
- 230000003712 anti-aging effect Effects 0.000 claims abstract description 11
- 239000006229 carbon black Substances 0.000 claims abstract description 11
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 11
- 239000003999 initiator Substances 0.000 claims abstract description 11
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 11
- 239000011593 sulfur Substances 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 9
- 238000006243 chemical reaction Methods 0.000 claims description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 22
- 238000005303 weighing Methods 0.000 claims description 20
- MYRTYDVEIRVNKP-UHFFFAOYSA-N 1,2-Divinylbenzene Chemical compound C=CC1=CC=CC=C1C=C MYRTYDVEIRVNKP-UHFFFAOYSA-N 0.000 claims description 14
- 238000003756 stirring Methods 0.000 claims description 14
- 238000010438 heat treatment Methods 0.000 claims description 13
- 239000000203 mixture Substances 0.000 claims description 13
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 12
- 239000011259 mixed solution Substances 0.000 claims description 12
- 239000007864 aqueous solution Substances 0.000 claims description 8
- 239000008367 deionised water Substances 0.000 claims description 7
- 229910021641 deionized water Inorganic materials 0.000 claims description 7
- 239000007795 chemical reaction product Substances 0.000 claims description 6
- 238000004140 cleaning Methods 0.000 claims description 6
- 238000000748 compression moulding Methods 0.000 claims description 6
- 239000006071 cream Substances 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 6
- 238000001035 drying Methods 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 6
- 238000002791 soaking Methods 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 6
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 claims description 4
- 238000010907 mechanical stirring Methods 0.000 claims description 4
- ZQMHJBXHRFJKOT-UHFFFAOYSA-N methyl 2-[(1-methoxy-2-methyl-1-oxopropan-2-yl)diazenyl]-2-methylpropanoate Chemical compound COC(=O)C(C)(C)N=NC(C)(C)C(=O)OC ZQMHJBXHRFJKOT-UHFFFAOYSA-N 0.000 claims description 4
- HMZGPNHSPWNGEP-UHFFFAOYSA-N octadecyl 2-methylprop-2-enoate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)C(C)=C HMZGPNHSPWNGEP-UHFFFAOYSA-N 0.000 claims description 4
- DBMJMQXJHONAFJ-UHFFFAOYSA-M Sodium laurylsulphate Chemical compound [Na+].CCCCCCCCCCCCOS([O-])(=O)=O DBMJMQXJHONAFJ-UHFFFAOYSA-M 0.000 claims description 3
- 238000001291 vacuum drying Methods 0.000 claims description 3
- 239000002994 raw material Substances 0.000 claims description 2
- MBMBGCFOFBJSGT-KUBAVDMBSA-N all-cis-docosa-4,7,10,13,16,19-hexaenoic acid Chemical compound CC\C=C/C\C=C/C\C=C/C\C=C/C\C=C/C\C=C/CCC(O)=O MBMBGCFOFBJSGT-KUBAVDMBSA-N 0.000 claims 2
- 229940090949 docosahexaenoic acid Drugs 0.000 claims 1
- 235000020669 docosahexaenoic acid Nutrition 0.000 claims 1
- 238000010521 absorption reaction Methods 0.000 abstract description 13
- 239000002270 dispersing agent Substances 0.000 abstract description 13
- 239000003431 cross linking reagent Substances 0.000 abstract description 5
- 238000010557 suspension polymerization reaction Methods 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 229920001007 Nylon 4 Polymers 0.000 description 4
- 125000005907 alkyl ester group Chemical group 0.000 description 4
- 230000035484 reaction time Effects 0.000 description 3
- 239000004094 surface-active agent Substances 0.000 description 3
- 239000004342 Benzoyl peroxide Substances 0.000 description 2
- OMPJBNCRMGITSC-UHFFFAOYSA-N Benzoylperoxide Chemical compound C=1C=CC=CC=1C(=O)OOC(=O)C1=CC=CC=C1 OMPJBNCRMGITSC-UHFFFAOYSA-N 0.000 description 2
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 description 2
- 125000005250 alkyl acrylate group Chemical group 0.000 description 2
- SOGAXMICEFXMKE-UHFFFAOYSA-N alpha-Methyl-n-butyl acrylate Natural products CCCCOC(=O)C(C)=C SOGAXMICEFXMKE-UHFFFAOYSA-N 0.000 description 2
- 235000019400 benzoyl peroxide Nutrition 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- XOJWAAUYNWGQAU-UHFFFAOYSA-N 4-(2-methylprop-2-enoyloxy)butyl 2-methylprop-2-enoate Chemical compound CC(=C)C(=O)OCCCCOC(=O)C(C)=C XOJWAAUYNWGQAU-UHFFFAOYSA-N 0.000 description 1
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- OCDWICPYKQMQSQ-UHFFFAOYSA-N docosyl 2-methylprop-2-enoate Chemical compound CCCCCCCCCCCCCCCCCCCCCCOC(=O)C(C)=C OCDWICPYKQMQSQ-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 description 1
- 239000001267 polyvinylpyrrolidone Substances 0.000 description 1
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 description 1
- 229920000036 polyvinylpyrrolidone Polymers 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000010558 suspension polymerization method Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
- C08F220/1818—C13or longer chain (meth)acrylate, e.g. stearyl (meth)acrylate
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/02—Copolymers with acrylonitrile
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Sealing Material Composition (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to a preparation method and application of sealing rubber toughening and reinforcing modifier polymer rubber powder, which is prepared by mixing long-chain monomer and short-chain monomer through suspension polymerization, wherein the mass ratio of the long-chain monomer to the short-chain monomer is 5-8:1, the initiator is 0.5-2%, the cross-linking agent is 2-3%, the dispersing agent is 1.5-2%, the dosages are mass ratio of the total monomer, 60-80 parts of nitrile rubber, 10-30 parts of ethylene propylene diene monomer rubber, 1-2 parts of anti-aging agent, 5-6 parts of white carbon black, 2-3 parts of sulfur and 0-30 parts of polymer rubber powder are mixed to obtain the sealing rubber; the polymer rubber powder prepared by the invention has higher oil absorption rate, and the sealing rubber added with the sealing rubber toughening and reinforcing modifier polymer rubber powder has better oil absorption expansion rate, better tensile strength, higher elongation at break and the like, so that the phenomenon of oil leakage in the running process of a valve can be quickly blocked.
Description
Technical Field
The invention relates to the field of sealing rubber modifiers, in particular to a preparation method and application of sealing rubber toughening and reinforcing modifier polymer rubber powder.
Technical Field
The sealing rubber ring is widely applied to daily production, such as parts of automobiles, shipbuilding, electronic appliances, pipeline joints and the like, but in the long-term use process, the sealing rubber is easy to age, the sealing effect is influenced, the phenomena of weakening of the sealing effect, leakage of a pipeline and the like are caused, the use of the pipeline is influenced, and a certain danger exists.
Sealing washer in the engine can shake, generate heat along with the long-term operation of engine, cause sealed effect to reduce, there is some oil leakage, if can provide a sealing rubber circle that can oil absorption inflation, just can easily solve the oil leak problem, for example, when machine vibration valve clearance became big, sealing washer adsorbs oil leak or solvent, volume expansion blocks up the oil and spills from the valve, play better sealed effect, after the machine shut down stably, sealing rubber circle absorptive oil can be through the original pressure of pipeline back oil in the pipeline again, do not influence the use of equipment.
Disclosure of Invention
The invention aims to overcome the problems encountered in the use process of the sealing rubber, and provides a preparation method and application of the sealing rubber toughening and reinforcing modifier polymer rubber powder.
The technical scheme of the invention is as follows:
a preparation method of polymer rubber powder of a sealing rubber toughening and reinforcing modifier comprises the following steps:
(1) Weighing long-chain alkyl acrylate monomer and short-chain alkyl ester monomer according to the mass ratio of 5-8:1 in a 1L beaker, weighing cross-linking agent divinylbenzene accounting for 2-3% of the total mass of the mixed monomers in the beaker, stirring for 20-30 min, and uniformly mixing to obtain monomer mixed solution;
(2) Preparing a dispersing agent aqueous solution with the mass fraction of 10%, wherein the dispersing agent is polypyrrolidone or a macromolecular surfactant;
(3) Weighing a proper amount of dispersant aqueous solution in a 5L reaction bottle, starting stirring, heating in a water bath to 45-50 ℃ at the rotating speed of 500r/min, wherein the dosage of dispersant solute accounts for 0.5-2% of the total mass of the mixed monomers;
(4) Slowly dripping the monomer mixed solution into a 5L reaction bottle to enable a system in the reaction bottle to be in a milky cream shape, and adding a proper amount of deionized water after dripping is finished; the rotational speed is adjusted to 400r/min, and the water bath temperature is increased, so that the temperature in the reaction bottle is increased to 60-75 ℃;
(5) When the temperature in the reaction bottle is stabilized at 60-75 ℃, adding an initiator accounting for 0.5-2% of the total mass of the mixed monomers into a 5L reaction bottle, and starting the polymerization reaction for 10 hours;
(6) Stopping heating, reducing the temperature in the reaction bottle to about 30 ℃ by reducing the water bath temperature, discharging, filtering the reaction product by using a 500-mesh screen, soaking, stirring and cleaning by using ethanol, removing initiator residues, residual monomers and dispersing agents, transferring into a vacuum oven, vacuumizing and drying at room temperature for 24 hours, and finally obtaining the white solid granular polymer rubber powder.
Further, the acrylic acid long-chain alkyl ester monomer is one or more of methacrylic acid behenyl ester and methacrylic acid stearyl ester, and the short-chain alkyl ester monomer is one or more of acrylic acid ethyl ester, acrylonitrile and methacrylic acid butyl ester; the initiator is selected from azodiisoheptonitrile, dimethyl azodiisobutyrate or benzoyl peroxide; the cross-linking agent is divinylbenzene, and the water used is deionized water; the dispersing agent is polyvinylpyrrolidone or macromolecular surfactant.
The sealing rubber toughening reinforcing modifier polymer rubber powder is prepared by the method.
The application of sealing rubber toughening reinforcing modifier polymer rubber powder in preparing sealing rubber is characterized in that the sealing rubber is prepared from the following raw materials in parts by weight: 60-80 parts of nitrile rubber, 10-30 parts of ethylene propylene diene monomer rubber, 1-2 parts of anti-aging agent, 5-6 parts of white carbon black, 2-3 parts of sulfur and 0-30 parts of sealing rubber modifier polymer rubber powder;
the sealing rubber is prepared by the following method:
weighing nitrile rubber and ethylene propylene diene monomer according to parts by weight, and then adding the nitrile rubber and the ethylene propylene diene monomer into an internal mixer for banburying to obtain a banburying material;
adding the banburying material into an open mill, weighing an anti-aging agent, white carbon black, sulfur and polymer rubber powder according to parts by weight, adding the mixture into the open mill, mixing, pouring the mixture into a mold, and performing compression molding to obtain the sealing rubber.
Compared with the prior art, the invention has the beneficial effects that:
the polymer rubber powder prepared by the invention has higher oil absorption rate, and the sealing rubber added with the sealing rubber toughening and reinforcing modifier polymer rubber powder has better oil absorption expansion rate, better tensile strength, higher elongation at break and the like, so that the phenomenon of oil leakage in the running process of a valve can be quickly blocked.
Detailed Description
The present invention will be described in further detail with reference to examples.
A preparation method of polymer rubber powder of a sealing rubber modifier comprises the following steps:
(1) Weighing long-chain alkyl acrylate and short-chain alkyl ester according to the mass ratio of (5-8:1) in a 1L beaker, weighing a cross-linking agent (divinylbenzene or 1, 4-butanediol dimethacrylate) accounting for 2-3% of the total mass of the mixed monomers in the beaker, stirring for 20-30 min, and uniformly mixing to obtain a monomer mixed solution.
(2) An aqueous solution of a dispersant (polypyrrolidone or a macromolecular surfactant) was prepared with a mass fraction of 10%.
(3) An appropriate amount of dispersant aqueous solution (the dispersant solute amount accounts for 0.5% -2% of the total mass of the mixed monomers) is weighed into a 5L reaction bottle, stirring is started, the rotating speed is 500r/min, and the temperature is raised to 45-50 ℃ in a water bath.
(4) Slowly dripping the monomer mixed solution into a 5L reaction bottle to enable a system in the reaction bottle to be in a milky cream shape, and adding a proper amount of deionized water after dripping is finished; the rotational speed is adjusted to 400r/min, and the water bath temperature is increased, so that the temperature in the reaction bottle is increased to 60-75 ℃.
(5) When the temperature in the reaction bottle is stabilized at 60-75 ℃, an initiator (azodiisoheptonitrile, dimethyl azodiisobutyrate and benzoyl peroxide) accounting for 0.5-2% of the total mass of the mixed monomers is added into a 5L reaction bottle, the polymerization reaction starts to time, and the reaction time is 10 hours.
(6) Stopping heating, reducing the temperature in the reaction bottle to about 30 ℃ by reducing the water bath temperature, discharging, filtering the reaction product by using a 500-mesh screen, soaking, stirring and cleaning by using ethanol, removing initiator residues, residual monomers and dispersing agents, transferring into a vacuum oven, vacuumizing and drying at room temperature for 24 hours, and finally obtaining the white solid granular polymer rubber powder.
A toughening and reinforcing modified sealing rubber material comprises a main material and polymer rubber powder: the main material comprises the following components: 60-80 parts of nitrile rubber, 10-30 parts of ethylene propylene diene monomer rubber, 1-2 parts of anti-aging agent, 5-6 parts of white carbon black and 2-3 parts of sulfur; the polymer rubber powder is sealing rubber modifier polymer rubber powder synthesized by a suspension polymerization method in a laboratory.
Weighing nitrile rubber and ethylene propylene diene monomer according to parts by weight, and then adding the nitrile rubber and the ethylene propylene diene monomer into an internal mixer for banburying to obtain a banburying material;
adding the banburying material into an open mill, weighing an anti-aging agent, white carbon black, sulfur and polymer rubber powder according to parts by weight, adding the mixture into the open mill, mixing, pouring the mixture into a mold, and performing compression molding to obtain sealing rubber;
and (3) testing the mechanical properties, oil absorption expansibility and the like of the sealing rubber added with different types and amounts of polymer rubber powder.
Example 1
Weighing 300g of docosa-alkyl methacrylate, 50g of ethyl acrylate and 10.5g of divinylbenzene according to a proportion, and stirring in a 1L beaker for 20-30 min to obtain a monomer mixed solution; then weighing 35g of polypyrrolidone aqueous solution (the mass concentration is 10%) in a 5L reaction bottle, starting mechanical stirring, the rotating speed is 500r/min, and heating in a water bath to 45 ℃; slowly dripping the monomer mixed solution into a 5L reaction bottle to enable a system in the reaction bottle to be in a milky cream shape; after the dripping is finished, adding 2.85kg of deionized water, and heating to 75 ℃; adding 5.25g of azo-diisoheptonitrile initiator to start the reaction, wherein the reaction time is 10 hours; stopping heating, reducing the temperature in the reaction bottle to below 30 ℃ by reducing the water bath temperature, and discharging; filtering the reaction product by a 500-mesh screen, soaking by ethanol, stirring and cleaning; and transferring the mixture into a vacuum drying oven, and vacuumizing and drying the mixture at room temperature for 24 hours to obtain dry white solid granular polymer rubber powder.
65 parts of nitrile rubber and 25 parts of ethylene propylene diene monomer rubber are weighed according to parts by weight, all the components are put into an internal mixer and banburying is carried out for 10 minutes at 100 ℃ to obtain banburying rubber;
adding the banburying material into an open mill, weighing 1 part of an anti-aging agent, 5 parts of white carbon black, 2 parts of sulfur and 0-30 parts of polymer rubber powder according to parts by weight, adding into the open mill, mixing for 8 minutes at 100 ℃ in the open mill, pouring into a die after mixing, and performing compression molding to obtain the sealing rubber;
and (3) testing the mechanical properties, oil absorption expansibility and the like of the sealing rubber added with different amounts of polymer rubber powder.
Example 2
Weighing 300g of docosa-alkyl methacrylate, 50g of octadecyl methacrylate, 50g of acrylonitrile and 6g of divinylbenzene according to a proportion, and stirring in a 1L beaker for 20-30 min to obtain a monomer mixed solution; then 60g of sodium dodecyl sulfate aqueous solution (the mass concentration is 10%) is weighed into a 5L reaction bottle, mechanical stirring is started, the rotating speed is 350r/min, and the temperature is raised to 45 ℃ in a water bath; slowly dripping the monomer mixed solution into a 5L reaction bottle to enable a system in the reaction bottle to be in a milky cream shape; after the dripping is finished, adding 2.82kg of deionized water, and heating to 75 ℃; adding 6.0g of dimethyl azodiisobutyrate initiator, and starting the reaction for 10 hours; stopping heating, reducing the temperature in the reaction bottle to below 25 ℃ by reducing the water bath temperature, and discharging; filtering the reaction product by a 500-mesh screen, soaking by ethanol, stirring and cleaning; and transferring the mixture into a vacuum drying oven, and vacuumizing and drying the mixture at room temperature for 24 hours to obtain dry white solid granular polymer rubber powder.
65 parts of nitrile rubber and 25 parts of ethylene propylene diene monomer rubber are weighed according to parts by weight, all the components are put into an internal mixer and banburying is carried out for 10 minutes at 100 ℃ to obtain banburying rubber;
adding the banburying material into an open mill, weighing 1 part of an anti-aging agent, 5 parts of white carbon black, 2 parts of sulfur and 0-30 parts of polymer rubber powder according to parts by weight, adding into the open mill, mixing for 8 minutes at 100 ℃ in the open mill, pouring into a die after mixing, and performing compression molding to obtain the sealing rubber;
and (3) testing the mechanical properties, oil absorption expansibility and the like of the sealing rubber added with different amounts of polymer rubber powder.
Example 3
Weighing 450g of octadecyl methacrylate, 45g of acrylonitrile, 45g of methyl methacrylate and 10.8g of divinylbenzene according to a proportion, and stirring in a 1L beaker for 20-30 min to obtain a monomer mixed solution; then, 27g of polypyrrolidone aqueous solution (the mass concentration is 10%) and 27g of sodium dodecyl sulfate (the mass concentration is 10%) are weighed into a 5L reaction bottle, mechanical stirring is started, the rotating speed is 350r/min, and the temperature is raised to 45 ℃ in a water bath; slowly dripping the monomer mixed solution into a 5L reaction bottle to enable a system in the reaction bottle to be in a milky cream shape; after the dripping is finished, adding 2.7kg of deionized water, and heating to 75 ℃; 10.8g of azo-diisoheptonitrile initiator is added to start the reaction, and the reaction time is 10 hours; stopping heating, reducing the temperature in the reaction bottle to about 25 ℃ by reducing the water bath temperature, and discharging; filtering the reaction product by a 500-mesh screen, soaking by ethanol, stirring and cleaning; and transferring the mixture into a vacuum oven, vacuumizing, and drying at room temperature for 24 hours to obtain dry white solid granular polymer rubber powder.
65 parts of nitrile rubber and 25 parts of ethylene propylene diene monomer rubber are weighed according to parts by weight, all the components are put into an internal mixer and banburying is carried out for 10 minutes at 100 ℃ to obtain banburying rubber;
adding the banburying material into an open mill, weighing 1 part of an anti-aging agent, 5 parts of white carbon black, 2 parts of sulfur and 0-30 parts of polymer rubber powder according to parts by weight, adding into the open mill, mixing for 8 minutes at 100 ℃ in the open mill, pouring into a die after mixing, and performing compression molding to obtain the sealing rubber;
and (3) testing the mechanical properties, oil absorption expansibility and the like of the sealing rubber added with different amounts of polymer rubber powder.
The above prepared 20 kinds of sealing rubber, and 2 kinds of commercially available sealing rubber are added, and each batch of sealing rubber is subjected to mechanical property, oil absorption expansion and other tests, and the test data are shown in the following table.
The invention relates to a preparation method of sealing rubber toughening reinforcing modifier polymer rubber powder, which is prepared by mixing long-chain monomer and short-chain monomer through suspension polymerization, wherein the mass ratio of the long-chain monomer to the short-chain monomer is 5-8:1, the initiator is 0.5-2%, the cross-linking agent is 2-3%, the dispersing agent is 1.5-2%, the mass ratio of the dispersing agent to the total monomer is the mass ratio, and 60-80 parts of nitrile rubber, 10-30 parts of ethylene propylene diene monomer, 1-2 parts of anti-aging agent, 5-6 parts of white carbon black, 2-3 parts of sulfur and 0-30 parts of polymer rubber powder are mixed to obtain the sealing rubber; the polymer rubber powder prepared by the invention has higher oil absorption rate, and the sealing rubber added with the sealing rubber toughening and reinforcing modifier polymer rubber powder has better oil absorption expansion rate, better tensile strength, higher elongation at break and the like, so that the phenomenon of oil leakage in the running process of a valve can be quickly blocked. According to the invention, through the synthesis of the polymer rubber powder and the adjustment of the added parts, the mechanical property, the oil absorption expansibility and the like of the sealing rubber added with different types and amounts of the polymer rubber powder are tested, and the polymer rubber powder added into the sealing rubber is found to obviously increase the toughness and the strength of the rubber at the same time, and has a good sealing effect.
Claims (3)
1. The preparation method of the sealing rubber toughening and reinforcing modifier polymer rubber powder is characterized by comprising the following steps:
(1) Weighing the docosahexaenoic acid 300g, the octadecyl methacrylate 50g, the acrylonitrile 50g and the divinylbenzene 6g according to the proportion, and stirring in a 1L beaker for 20-30 min to obtain a monomer mixed solution;
(2) Weighing 60g mass percent 10% sodium dodecyl sulfate aqueous solution in a 5L reaction bottle, starting mechanical stirring at the rotating speed of 350r/min, and heating to 45 ℃ in a water bath;
(3) Slowly dripping the monomer mixed solution into a 5L reaction bottle to enable a system in the reaction bottle to be in a milky cream shape;
(4) Adding 2.82kg deionized water after the dripping is finished, heating to 75 ℃, adding 6.0g dimethyl azodiisobutyrate initiator, starting the reaction for 10 hours, stopping heating, reducing the temperature in a reaction bottle to below 25 ℃ by reducing the water bath temperature, and discharging;
(5) Filtering the reaction product by a 500-mesh screen, soaking by ethanol, stirring and cleaning;
(6) And transferring the mixture into a vacuum drying oven, and vacuumizing and drying the mixture at room temperature for 24 hours to obtain dry white solid granular polymer rubber powder.
2. A sealing rubber toughening reinforcing modifier polymer powder prepared by the method of claim 1.
3. Use of the sealing rubber toughening and reinforcing modifier polymer rubber powder according to claim 2 for preparing sealing rubber, wherein the sealing rubber is prepared from the following raw materials in parts by weight: 65 parts of nitrile rubber, 25 parts of ethylene propylene diene monomer rubber, 1-2 parts of anti-aging agent, 5-6 parts of white carbon black, 2-3 parts of sulfur and 5-10 parts of sealing rubber modifier polymer rubber powder;
the sealing rubber is prepared by the following method:
weighing nitrile rubber and ethylene propylene diene monomer according to parts by weight, and then adding the nitrile rubber and the ethylene propylene diene monomer into an internal mixer for banburying to obtain a banburying material;
adding the banburying material into an open mill, weighing an anti-aging agent, white carbon black, sulfur and polymer rubber powder according to parts by weight, adding the mixture into the open mill, mixing, pouring the mixture into a mold, and performing compression molding to obtain the sealing rubber.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210306152.9A CN114773520B (en) | 2022-03-25 | 2022-03-25 | Preparation method and application of polymer rubber powder of sealing rubber toughening and reinforcing modifier |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210306152.9A CN114773520B (en) | 2022-03-25 | 2022-03-25 | Preparation method and application of polymer rubber powder of sealing rubber toughening and reinforcing modifier |
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| Publication Number | Publication Date |
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| CN114773520A CN114773520A (en) | 2022-07-22 |
| CN114773520B true CN114773520B (en) | 2024-03-22 |
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| CN (1) | CN114773520B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0441512A2 (en) * | 1990-01-29 | 1991-08-14 | Nippon Shokubai Co., Ltd. | Oil- absorbent polymer and use therefor |
| CN1724575A (en) * | 2005-06-03 | 2006-01-25 | 江苏工业学院 | Porous high oil adsorption resin and its preparation method |
| CN101967212A (en) * | 2010-09-09 | 2011-02-09 | 上海闰铭精密技术有限公司 | Acrylate polymer high oil absorption resin and preparation method and application thereof |
| CN104558385A (en) * | 2015-01-29 | 2015-04-29 | 北京林业大学 | Quick high-efficiency oil-adsorbing resin and preparation method thereof |
| CN106496815A (en) * | 2016-10-31 | 2017-03-15 | 中国石油集团川庆钻探工程有限公司 | oil-absorbing expansion rubber and preparation process thereof |
-
2022
- 2022-03-25 CN CN202210306152.9A patent/CN114773520B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0441512A2 (en) * | 1990-01-29 | 1991-08-14 | Nippon Shokubai Co., Ltd. | Oil- absorbent polymer and use therefor |
| CN1724575A (en) * | 2005-06-03 | 2006-01-25 | 江苏工业学院 | Porous high oil adsorption resin and its preparation method |
| CN101967212A (en) * | 2010-09-09 | 2011-02-09 | 上海闰铭精密技术有限公司 | Acrylate polymer high oil absorption resin and preparation method and application thereof |
| CN104558385A (en) * | 2015-01-29 | 2015-04-29 | 北京林业大学 | Quick high-efficiency oil-adsorbing resin and preparation method thereof |
| CN106496815A (en) * | 2016-10-31 | 2017-03-15 | 中国石油集团川庆钻探工程有限公司 | oil-absorbing expansion rubber and preparation process thereof |
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| CN114773520A (en) | 2022-07-22 |
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