CN117167484A - Dynamic sealing rubber ring and preparation method and application thereof - Google Patents
Dynamic sealing rubber ring and preparation method and application thereof Download PDFInfo
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- CN117167484A CN117167484A CN202311113273.2A CN202311113273A CN117167484A CN 117167484 A CN117167484 A CN 117167484A CN 202311113273 A CN202311113273 A CN 202311113273A CN 117167484 A CN117167484 A CN 117167484A
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- 229920001971 elastomer Polymers 0.000 title claims abstract description 110
- 239000005060 rubber Substances 0.000 title claims abstract description 110
- 238000007789 sealing Methods 0.000 title claims abstract description 71
- 238000002360 preparation method Methods 0.000 title claims abstract description 23
- 239000000843 powder Substances 0.000 claims abstract description 42
- 239000000463 material Substances 0.000 claims abstract description 32
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 31
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 claims abstract description 30
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 30
- 229920000459 Nitrile rubber Polymers 0.000 claims abstract description 28
- 229920002678 cellulose Polymers 0.000 claims abstract description 27
- 239000001913 cellulose Substances 0.000 claims abstract description 27
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims abstract description 11
- 239000004354 Hydroxyethyl cellulose Substances 0.000 claims abstract description 11
- 239000001768 carboxy methyl cellulose Substances 0.000 claims abstract description 11
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims abstract description 11
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims abstract description 11
- 238000001125 extrusion Methods 0.000 claims abstract description 11
- 235000019447 hydroxyethyl cellulose Nutrition 0.000 claims abstract description 11
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 claims abstract description 11
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 claims abstract description 11
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 claims abstract description 11
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 claims abstract description 11
- DQSYGNJXYMAPMV-UHFFFAOYSA-N 2,6-ditert-butyl-4-(3,5-ditert-butyl-4-hydroxyphenyl)sulfanylphenol Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(SC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 DQSYGNJXYMAPMV-UHFFFAOYSA-N 0.000 claims abstract description 10
- RFRMMZAKBNXNHE-UHFFFAOYSA-N 6-[4,6-dihydroxy-5-(2-hydroxyethoxy)-2-(hydroxymethyl)oxan-3-yl]oxy-2-(hydroxymethyl)-5-(2-hydroxypropoxy)oxane-3,4-diol Chemical compound CC(O)COC1C(O)C(O)C(CO)OC1OC1C(O)C(OCCO)C(O)OC1CO RFRMMZAKBNXNHE-UHFFFAOYSA-N 0.000 claims abstract description 7
- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical compound CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 claims abstract description 6
- 235000010354 butylated hydroxytoluene Nutrition 0.000 claims abstract description 6
- -1 3, 5-di-tert-butyl-4-hydroxyphenyl Chemical group 0.000 claims abstract description 5
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 claims abstract description 5
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 0.000 claims abstract description 4
- 239000002994 raw material Substances 0.000 claims abstract description 4
- NFHFRUOZVGFOOS-UHFFFAOYSA-N palladium;triphenylphosphane Chemical compound [Pd].C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 NFHFRUOZVGFOOS-UHFFFAOYSA-N 0.000 claims abstract 3
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 claims abstract 2
- 238000001816 cooling Methods 0.000 claims description 13
- 238000007334 copolymerization reaction Methods 0.000 claims description 12
- 239000000839 emulsion Substances 0.000 claims description 12
- 238000002156 mixing Methods 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 10
- 150000008301 phosphite esters Chemical class 0.000 claims description 10
- 239000000203 mixture Substances 0.000 claims description 7
- 229920000663 Hydroxyethyl cellulose Polymers 0.000 claims description 5
- 238000002844 melting Methods 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 4
- NTXGQCSETZTARF-UHFFFAOYSA-N buta-1,3-diene;prop-2-enenitrile Chemical compound C=CC=C.C=CC#N NTXGQCSETZTARF-UHFFFAOYSA-N 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 238000000227 grinding Methods 0.000 claims description 2
- 230000035939 shock Effects 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 239000000758 substrate Substances 0.000 abstract description 6
- 230000007547 defect Effects 0.000 abstract description 2
- 230000003647 oxidation Effects 0.000 abstract description 2
- 238000007254 oxidation reaction Methods 0.000 abstract description 2
- 239000003566 sealing material Substances 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 9
- 238000012360 testing method Methods 0.000 description 8
- 230000003712 anti-aging effect Effects 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 5
- 229910021389 graphene Inorganic materials 0.000 description 5
- 239000000945 filler Substances 0.000 description 4
- 229920001973 fluoroelastomer Polymers 0.000 description 4
- 229910002804 graphite Inorganic materials 0.000 description 4
- 239000010439 graphite Substances 0.000 description 4
- 244000043261 Hevea brasiliensis Species 0.000 description 3
- 229920000877 Melamine resin Polymers 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- IANQTJSKSUMEQM-UHFFFAOYSA-N 1-benzofuran Chemical compound C1=CC=C2OC=CC2=C1 IANQTJSKSUMEQM-UHFFFAOYSA-N 0.000 description 2
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 2
- 235000021355 Stearic acid Nutrition 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 239000006229 carbon black Substances 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229920003052 natural elastomer Polymers 0.000 description 2
- 229920001194 natural rubber Polymers 0.000 description 2
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 2
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 2
- 239000008117 stearic acid Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 230000002195 synergetic effect Effects 0.000 description 2
- 229920003051 synthetic elastomer Polymers 0.000 description 2
- 239000005061 synthetic rubber Substances 0.000 description 2
- 238000004073 vulcanization Methods 0.000 description 2
- WPMYUUITDBHVQZ-UHFFFAOYSA-N 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoic acid Chemical compound CC(C)(C)C1=CC(CCC(O)=O)=CC(C(C)(C)C)=C1O WPMYUUITDBHVQZ-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- 244000025254 Cannabis sativa Species 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229920006125 amorphous polymer Polymers 0.000 description 1
- 238000000498 ball milling Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- XENVCRGQTABGKY-ZHACJKMWSA-N chlorohydrin Chemical compound CC#CC#CC#CC#C\C=C\C(Cl)CO XENVCRGQTABGKY-ZHACJKMWSA-N 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 229920005560 fluorosilicone rubber Polymers 0.000 description 1
- 230000009477 glass transition Effects 0.000 description 1
- 230000026030 halogenation Effects 0.000 description 1
- 238000005658 halogenation reaction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000713 high-energy ball milling Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- DEQZTKGFXNUBJL-UHFFFAOYSA-N n-(1,3-benzothiazol-2-ylsulfanyl)cyclohexanamine Chemical compound C1CCCCC1NSC1=NC2=CC=CC=C2S1 DEQZTKGFXNUBJL-UHFFFAOYSA-N 0.000 description 1
- 239000002114 nanocomposite Substances 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 230000000379 polymerizing effect Effects 0.000 description 1
- 229920001021 polysulfide Polymers 0.000 description 1
- 239000005077 polysulfide Substances 0.000 description 1
- 150000008117 polysulfides Polymers 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
Landscapes
- Compositions Of Macromolecular Compounds (AREA)
- Sealing Material Composition (AREA)
Abstract
The invention relates to a dynamic sealing rubber ring and a preparation method and application thereof, and belongs to the technical field of rubber ring materials. The dynamic sealing rubber ring comprises rubber substrate powder and an antioxidant; the raw materials of the rubber base material powder comprise butadiene, acrylonitrile and cellulose; the cellulose consists of hydroxypropyl methyl cellulose, hydroxyethyl cellulose and carboxymethyl cellulose; the antioxidant consists of any one of 2, 6-di-tert-butyl-4-methylphenol, bis (3, 5-di-tert-butyl-4-hydroxyphenyl) sulfide and pentaerythritol tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] and phosphite. In the invention, the base material powder and the antioxidant are mixed, and are subjected to melt extrusion for making a ring, so that the dynamic sealing rubber ring is obtained. The dynamic sealing rubber ring overcomes the defect of taking the nitrile rubber as a sealing material in the prior art, and has the characteristics of stretching resistance, oxidation resistance, good air tightness and long-time use.
Description
Technical Field
The invention belongs to the technical field of rubber ring materials, and relates to a dynamic sealing rubber ring, a preparation method and application thereof.
Background
The rubber is a high-elasticity polymer material with reversible deformation, is elastic at room temperature, can generate larger deformation under the action of small external force, and can recover after the external force is removed. The rubber is a completely amorphous polymer with a low glass transition temperature and often a large molecular weight, greater than several hundred thousand. Rubber is classified into natural rubber and synthetic rubber. The natural rubber is prepared by extracting colloid from plants such as rubber tree, rubber grass, etc.; the synthetic rubber is obtained by polymerizing various monomers. Rubber products are widely used in industry or life.
Nitrile rubber is a polymer formed by emulsion copolymerization of butadiene and acrylonitrile, and is mainly used for sealing products. Nitrile rubber is known for its excellent oil resistance, which is inferior to polysulfide rubber, acrylate rubber and fluororubber, and has good abrasion resistance and air tightness, but is inferior in aging resistance, tensile resistance and ozone resistance, and causes problems such as hardening and cracking after long-term use.
Patent CN111171480a discloses a lip seal ring for a rotating shaft of an automobile engine, which is composed of a fluororubber system, a melamine formaldehyde resin system and a graphene oxide system, and is prepared through the processes of open mill, extrusion, compression molding, vulcanization molding, product post-treatment and the like. The lip-shaped sealing ring for the automobile engine rotating shaft has the advantages that the preparation method is simple, the fluororubber material is used as the base material of the sealing ring, the high temperature resistance and the solvent resistance are good, the melamine formaldehyde resin system is added in the sealing ring, the functionality is high, the sealing ring can be subjected to crosslinking reaction with the filler and the rubber, and the mechanical strength and the wear resistance of the sealing ring are improved; the added graphene oxide system not only improves the thermal conductivity and gas barrier property of the sealing ring, but also is easy to form a brand new functional nano composite system with fluororubber and melamine formaldehyde resin system, and prolongs the service life of the sealing ring.
Patent CN116554566a discloses a nitrile rubber composition for a heat-vulcanized joint of a sealing strip, which is prepared from the following components in parts by weight: 100 parts of carboxylated nitrile rubber, 5-8 parts of zinc oxide, 1-2 parts of stearic acid, 50-80 parts of carbon black, 5-15 parts of liquid nitrile rubber, 5-8 parts of an anti-aging agent, 1-2 parts of sulfur and 3-5 parts of an accelerator. The nitrile rubber composition of the heat-vulcanized joint of the sealing strip has excellent physical and mechanical properties, and the production process is environment-friendly, meets the requirements of a host factory on products, and has high economic value. The nitrile rubber composition is used for carrying out heat vulcanization joint treatment on the sealing strip, has very high bonding strength on the sealing strip joint, and has smooth and flawless joint.
Patent CN112266511a discloses a preparation method of a wear-resistant automobile Y-shaped rubber ring, the wear-resistant automobile Y-shaped rubber ring is prepared from the following raw materials in parts by weight: the anti-aging agent comprises, by weight, 1052100-110 parts of nitrile rubber, 15-20 parts of fluorosilicone rubber, 60-65 parts of chlorohydrin rubber, 55040-60 parts of cabot carbon black, 3-5 parts of an anti-aging agent RD, 1-2 parts of coumarone resin, 1-2 parts of an accelerator CZ, 2-4 parts of sulfur, 100-120 parts of an activated filler, 1.5-2 parts of an anti-aging agent H, 0.8-1 part of an anti-aging agent MB, 0.8-1 part of stearic acid and 0.5-0.8 part of sulfur powder. According to the invention, the filler is modified, so that the filler compatibility is increased, the wear resistance and strength are greatly increased, and meanwhile, the tensile strength is high, and the material is used under high-wear environment conditions, so that the performance of the material is excellent and stable.
Patent CN115716948A discloses a preparation method of graphene doped nitrile rubber with high strength. Firstly, heating at a high temperature under vacuum to enable graphite to achieve a heat stripping effect, then mixing and ball milling graphite and magnesium oxide to further strip graphite, then placing a mixture of graphene and magnesium oxide, nano silicate fiber and nitrile rubber into an internal mixer for plasticating, and finally carrying out halogenation modification on the nitrile rubber of a finished product. The high-energy ball milling is used for better dispersing graphite into graphene. Compared with the traditional process, the preparation method of the graphene-doped nitrile rubber with high strength has the advantages that the number of steps is not increased obviously, the cost is reduced, the obtained nitrile rubber has good elasticity, and the tearing strength and the tensile strength of the rubber are improved.
Disclosure of Invention
The invention aims to provide a dynamic sealing rubber ring, and a preparation method and application thereof, and the dynamic sealing rubber ring has the characteristics of stretch resistance, oxidation resistance, good air tightness and long-time use.
The aim of the invention can be achieved by the following technical scheme:
the preparation method of the dynamic sealing rubber ring comprises the following steps:
(1) Preparing rubber base material powder;
(2) Preparing an antioxidant;
(3) And (3) blending the rubber base material powder and the antioxidant, performing melt extrusion to prepare an O-shaped rubber ring, and cooling to room temperature to obtain the dynamic sealing rubber ring.
As a preferable technical scheme of the invention, the raw materials of the rubber base material powder comprise butadiene, acrylonitrile and cellulose, wherein the rubber base material powder is prepared by firstly preparing butadiene-acrylonitrile into nitrile rubber through emulsion copolymerization, then melting and blending the nitrile rubber with the cellulose, cooling and grinding the nitrile rubber into powder to obtain the rubber base material powder.
As a preferable technical scheme of the invention, the cellulose consists of hydroxypropyl methyl cellulose, hydroxyethyl cellulose and carboxymethyl cellulose.
As a preferable technical scheme of the invention, the mass ratio of butadiene to acrylonitrile to cellulose is 30-40:40-50:10-30.
As a preferable technical scheme of the invention, the mass ratio of the hydroxypropyl methylcellulose to the hydroxyethyl cellulose to the carboxymethyl cellulose is 30-35:40-45:20-30.
As a preferable technical scheme of the invention, the antioxidant consists of any one of 2, 6-di-tert-butyl-4-methylphenol, bis (3, 5-di-tert-butyl-4-hydroxyphenyl) sulfide and pentaerythritol tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] and phosphite ester.
As a preferable technical scheme of the invention, the mass ratio of any one of the 2, 6-di-tert-butyl-4-methylphenol, bis (3, 5-di-tert-butyl-4-hydroxyphenyl) sulfide and tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester to the phosphite ester is 60-70:30-40.
As a preferable technical scheme of the invention, the mass ratio of the rubber base material powder to the antioxidant is 70-80:20-30.
The dynamic sealing rubber ring prepared by the preparation method is provided.
As a preferable technical scheme of the invention, the dynamic sealing rubber ring is applied to a fully self-anchored shock-resistant flexible interface steel pipe.
The invention has the beneficial effects that:
(1) The formula of the dynamic sealing rubber ring and the preparation method thereof overcome the defects of poor ageing resistance, tensile resistance and ozone resistance of the existing nitrile rubber as a matrix material.
(2) The dynamic sealing rubber ring provided by the invention has good tensile property and sealing property, and can not generate the problems of hardening, cracking and even pulverization after long-time use.
(3) The formula of the cellulose and the antioxidant provided by the invention improves the tensile property and the service life of the sealing ring through the synergistic effect, so that the dynamic sealing rubber ring still has good sealing property after long-time use.
Detailed Description
In order to further describe the technical means and effects adopted by the present invention for achieving the intended purpose, the following detailed description is given below with reference to the embodiments, structures, features and effects according to the present invention.
Example 1
The preparation method of the dynamic sealing rubber ring comprises the following steps:
(1) Preparing hydroxypropyl methyl cellulose, hydroxyethyl cellulose and carboxymethyl cellulose into cellulose according to a mass ratio of 30:40:30;
(2) Butadiene, acrylonitrile and cellulose are prepared into nitrile rubber by emulsion copolymerization according to the mass ratio of 30:40:30, and then are melted and blended with cellulose, cooled and ground into powder to obtain rubber base material powder;
(3) Preparing an antioxidant from 2, 6-di-tert-butyl-4-methylphenol and phosphite ester according to a mass ratio of 60:40;
(4) And (3) mixing the rubber base material powder and the antioxidant according to the mass ratio of 70:30, carrying out melt extrusion to prepare an O-shaped rubber ring, and cooling to room temperature to obtain the dynamic sealing rubber ring.
Example 2
The preparation method of the dynamic sealing rubber ring comprises the following steps:
(1) Preparing hydroxypropyl methyl cellulose, hydroxyethyl cellulose and carboxymethyl cellulose into cellulose according to a mass ratio of 32:43:25;
(2) Butadiene, acrylonitrile and cellulose are prepared into nitrile rubber by emulsion copolymerization according to the mass ratio of 35:45:20, and then are melted and blended with cellulose, cooled and ground into powder to obtain rubber base material powder;
(3) Preparing an antioxidant from bis (3, 5-di-tert-butyl-4-hydroxyphenyl) sulfide and phosphite ester according to a mass ratio of 65:35;
(4) And (3) blending the rubber base material powder and the antioxidant according to the mass ratio of 75:25, carrying out melt extrusion to prepare an O-shaped rubber ring, and cooling to room temperature to obtain the dynamic sealing rubber ring.
Example 3
The preparation method of the dynamic sealing rubber ring comprises the following steps:
(1) Preparing hydroxypropyl methyl cellulose, hydroxyethyl cellulose and carboxymethyl cellulose into cellulose according to a mass ratio of 35:45:20;
(2) Butadiene, acrylonitrile and cellulose are prepared into nitrile rubber by emulsion copolymerization according to the mass ratio of 40:50:10, and then are melted and blended with cellulose, cooled and ground into powder to obtain rubber base material powder;
(3) Preparing antioxidant from pentaerythritol tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate and phosphite ester according to a mass ratio of 70:30;
(4) And (3) mixing the rubber base material powder and the antioxidant according to the mass ratio of 70:30, carrying out melt extrusion to prepare an O-shaped rubber ring, and cooling to room temperature to obtain the dynamic sealing rubber ring.
Comparative example 1
The preparation method of the dynamic sealing rubber ring comprises the following steps:
(1) Butadiene and acrylonitrile are prepared into rubber base material powder through emulsion copolymerization according to the mass ratio of 35:45;
(2) Preparing an antioxidant from bis (3, 5-di-tert-butyl-4-hydroxyphenyl) sulfide and phosphite ester according to a mass ratio of 65:35;
(3) And (3) blending the rubber base material powder and the antioxidant according to the mass ratio of 75:25, carrying out melt extrusion to prepare an O-shaped rubber ring, and cooling to room temperature to obtain the dynamic sealing rubber ring.
Comparative example 2
The preparation method of the dynamic sealing rubber ring comprises the following steps:
(1) Preparing hydroxypropyl methyl cellulose, hydroxyethyl cellulose and carboxymethyl cellulose into cellulose according to a mass ratio of 32:43:25;
(2) Butadiene, acrylonitrile and cellulose are prepared into nitrile rubber by emulsion copolymerization according to the mass ratio of 35:45:20, and then are melted and blended with cellulose, cooled and ground into powder to obtain rubber base material powder;
(3) And (3) melting and extruding the rubber substrate powder to prepare an O-shaped rubber ring, and cooling to room temperature to obtain the dynamic sealing rubber ring.
Comparative example 3
The preparation method of the dynamic sealing rubber ring comprises the following steps:
(1) Butadiene and acrylonitrile are prepared into rubber base material powder through emulsion copolymerization according to the mass ratio of 35:45;
(2) And (3) melting and extruding the rubber substrate powder to prepare an O-shaped rubber ring, and cooling to room temperature to obtain the dynamic sealing rubber ring.
Comparative example 4
The preparation method of the dynamic sealing rubber ring comprises the following steps:
(1) Butadiene, acrylonitrile and hydroxypropyl methyl cellulose are prepared into nitrile rubber through emulsion copolymerization according to the mass ratio of 35:45:20, and then are melt-blended with the hydroxypropyl methyl cellulose, cooled and ground into powder to obtain rubber substrate powder;
(2) Preparing an antioxidant from bis (3, 5-di-tert-butyl-4-hydroxyphenyl) sulfide and phosphite ester according to a mass ratio of 65:35;
(3) And (3) blending the base material powder and the antioxidant according to the mass ratio of 75:25, carrying out melt extrusion to prepare an O-shaped rubber ring, and cooling to room temperature to obtain the dynamic sealing rubber ring.
Comparative example 5
The preparation method of the dynamic sealing rubber ring comprises the following steps:
(1) Butadiene, acrylonitrile and hydroxyethyl cellulose are prepared into nitrile rubber by emulsion copolymerization according to the mass ratio of 35:45:20, and then are melt-blended with the hydroxyethyl cellulose, cooled and ground into powder to obtain rubber substrate powder;
(2) Preparing an antioxidant from bis (3, 5-di-tert-butyl-4-hydroxyphenyl) sulfide and phosphite ester according to a mass ratio of 65:35;
(3) And (3) blending the rubber base material powder and the antioxidant according to the mass ratio of 75:25, carrying out melt extrusion to prepare an O-shaped rubber ring, and cooling to room temperature to obtain the dynamic sealing rubber ring.
Comparative example 6
The preparation method of the dynamic sealing rubber ring comprises the following steps:
(1) Butadiene, acrylonitrile and carboxymethyl cellulose are prepared into nitrile rubber by emulsion copolymerization according to the mass ratio of 35:45:20, and then are melt-blended with the carboxymethyl cellulose, cooled and ground into powder to obtain rubber substrate powder;
(2) Preparing an antioxidant from bis (3, 5-di-tert-butyl-4-hydroxyphenyl) sulfide and phosphite ester according to a mass ratio of 65:35;
(3) And (3) blending the rubber base material powder and the antioxidant according to the mass ratio of 75:25, carrying out melt extrusion to prepare an O-shaped rubber ring, and cooling to room temperature to obtain the dynamic sealing rubber ring.
Performance testing
The above examples and comparative examples were subjected to various performance tests according to the GB/T528-2009 and GB/T33509-2017 test standards, and the results are shown in tables 1 and 2.
As can be seen from the test results in Table 1, the tensile strength at break, tensile strength at break and elongation at break of the example group are all better than those of the comparative example group, probably because the cellulose with a unique formulation proportion is added in the rubber matrix powder, thereby improving the overall tensile properties of the dynamic sealing rubber ring.
As can be seen from the test results of table 2, the test results of the sealing force and the sealing force retention of the example group are better than those of the comparative example group, probably because the antioxidant with a unique formulation proportion is added in the melt molding process of the dynamic sealing rubber ring, the antioxidant capacity of the dynamic sealing rubber ring is improved, and the sealing force retention thereof are improved.
As can be seen from the combination of tables 1 and 2, each test result of the comparative examples of cellulose added only, antioxidant added only or cellulose added with a single component is inferior to that of the example group, probably because the cellulose and antioxidant of the composite component improve the tensile properties, antioxidant properties and sealing force of the dynamic sealing rubber ring by synergistic effect.
TABLE 1 test results of dynamic seal rubber ring tensile Strength (MPa), tensile Strength at break (kN/m) and elongation at break (%)
Table 2 test results of sealing force (N) and sealing force retention (%) of dynamic seal rubber ring
The present invention is not limited to the above embodiments, but is capable of modification and variation in detail, and other modifications and variations can be made by those skilled in the art without departing from the scope of the present invention.
Claims (10)
1. The preparation method of the dynamic sealing rubber ring is characterized by comprising the following steps of:
(1) Preparing rubber base material powder;
(2) Preparing an antioxidant;
(3) And (3) blending the rubber base material powder and the antioxidant, performing melt extrusion to prepare an O-shaped rubber ring, and cooling to room temperature to obtain the dynamic sealing rubber ring.
2. The method for preparing the dynamic sealing rubber ring according to claim 1, wherein the raw materials of the rubber base material powder in the step (1) comprise butadiene, acrylonitrile and cellulose, and the rubber base material powder is obtained by preparing butadiene-acrylonitrile rubber by emulsion copolymerization, then melting and blending the butadiene-acrylonitrile rubber with the cellulose, cooling and grinding the mixture into powder.
3. The method for preparing a dynamic sealing rubber ring according to claim 2, wherein the cellulose is composed of hydroxypropyl methylcellulose, hydroxyethyl cellulose and carboxymethyl cellulose.
4. The method for preparing the dynamic sealing rubber ring according to claim 2, wherein the mass ratio of butadiene to acrylonitrile to cellulose is 30-40:40-50:10-30.
5. The method for preparing the dynamic sealing rubber ring according to claim 3, wherein the mass ratio of the hydroxypropyl methylcellulose to the hydroxyethyl cellulose to the carboxymethyl cellulose is 30-35:40-45:20-30.
6. The method for preparing a dynamic sealing rubber ring according to claim 1, wherein the antioxidant in the step (2) consists of any one of 2, 6-di-tert-butyl-4-methylphenol, bis (3, 5-di-tert-butyl-4-hydroxyphenyl) sulfide and pentaerythritol tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] and phosphite.
7. The method for preparing a dynamic sealing rubber ring according to claim 6, wherein the mass ratio of any one of 2, 6-di-tert-butyl-4-methylphenol, bis (3, 5-di-tert-butyl-4-hydroxyphenyl) sulfide and pentaerythritol tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] to phosphite ester is 60-70:30-40.
8. The method for preparing the dynamic sealing rubber ring according to claim 1, wherein the mass ratio of the rubber base material powder to the antioxidant in the step (3) is 70-80:20-30.
9. A dynamic sealing rubber ring prepared according to the preparation process of any one of claims 1 to 8.
10. The dynamic sealing rubber ring according to claim 9, wherein the dynamic sealing rubber ring is applied to a fully self-anchored shock-resistant flexible interface steel pipe.
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