CN114940810A - Special rubber alloy elastomer for sealing element and preparation method thereof - Google Patents
Special rubber alloy elastomer for sealing element and preparation method thereof Download PDFInfo
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- 229920001971 elastomer Polymers 0.000 title claims abstract description 116
- 239000005060 rubber Substances 0.000 title claims abstract description 66
- 239000000956 alloy Substances 0.000 title claims abstract description 53
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 53
- 239000000806 elastomer Substances 0.000 title claims abstract description 50
- 238000007789 sealing Methods 0.000 title claims abstract description 32
- 238000002360 preparation method Methods 0.000 title abstract description 5
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 54
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims abstract description 42
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims abstract description 40
- 229920002725 thermoplastic elastomer Polymers 0.000 claims abstract description 32
- 239000006087 Silane Coupling Agent Substances 0.000 claims abstract description 29
- 239000002994 raw material Substances 0.000 claims abstract description 28
- 239000006057 Non-nutritive feed additive Substances 0.000 claims abstract description 25
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 25
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 25
- 239000004088 foaming agent Substances 0.000 claims abstract description 25
- 239000012756 surface treatment agent Substances 0.000 claims abstract description 24
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims abstract description 21
- WGCNASOHLSPBMP-UHFFFAOYSA-N hydroxyacetaldehyde Natural products OCC=O WGCNASOHLSPBMP-UHFFFAOYSA-N 0.000 claims abstract description 20
- 229920000728 polyester Polymers 0.000 claims abstract description 20
- 238000004132 cross linking Methods 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims description 31
- 230000000655 anti-hydrolysis Effects 0.000 claims description 24
- -1 aminosiloxane Chemical class 0.000 claims description 16
- 229920001568 phenolic resin Polymers 0.000 claims description 13
- 229920000459 Nitrile rubber Polymers 0.000 claims description 10
- 238000001035 drying Methods 0.000 claims description 10
- 239000004800 polyvinyl chloride Substances 0.000 claims description 10
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- KXGFMDJXCMQABM-UHFFFAOYSA-N 2-methoxy-6-methylphenol Chemical compound [CH]OC1=CC=CC([CH])=C1O KXGFMDJXCMQABM-UHFFFAOYSA-N 0.000 claims description 8
- 239000005011 phenolic resin Substances 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- INBMQYRWBRXTJA-UHFFFAOYSA-N C1(=CC=CC2=CC=CC=C12)S(=O)(=O)O.C(CCC)[Na] Chemical compound C1(=CC=CC2=CC=CC=C12)S(=O)(=O)O.C(CCC)[Na] INBMQYRWBRXTJA-UHFFFAOYSA-N 0.000 claims description 5
- 229920000388 Polyphosphate Polymers 0.000 claims description 5
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 claims description 5
- 150000001412 amines Chemical class 0.000 claims description 5
- 229910052586 apatite Inorganic materials 0.000 claims description 5
- 238000005520 cutting process Methods 0.000 claims description 5
- 235000014113 dietary fatty acids Nutrition 0.000 claims description 5
- 238000001125 extrusion Methods 0.000 claims description 5
- 239000000194 fatty acid Substances 0.000 claims description 5
- 229930195729 fatty acid Natural products 0.000 claims description 5
- 238000002844 melting Methods 0.000 claims description 5
- 230000008018 melting Effects 0.000 claims description 5
- XLDBGFGREOMWSL-UHFFFAOYSA-N n,n'-bis[2,6-di(propan-2-yl)phenyl]methanediimine Chemical group CC(C)C1=CC=CC(C(C)C)=C1N=C=NC1=C(C(C)C)C=CC=C1C(C)C XLDBGFGREOMWSL-UHFFFAOYSA-N 0.000 claims description 5
- VSIIXMUUUJUKCM-UHFFFAOYSA-D pentacalcium;fluoride;triphosphate Chemical compound [F-].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O VSIIXMUUUJUKCM-UHFFFAOYSA-D 0.000 claims description 5
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 5
- 239000001205 polyphosphate Substances 0.000 claims description 5
- 235000011176 polyphosphates Nutrition 0.000 claims description 5
- 229920001296 polysiloxane Polymers 0.000 claims description 5
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 claims description 5
- 238000010074 rubber mixing Methods 0.000 claims description 5
- 229910052938 sodium sulfate Inorganic materials 0.000 claims description 5
- 235000011152 sodium sulphate Nutrition 0.000 claims description 5
- 229960002447 thiram Drugs 0.000 claims description 5
- KUAZQDVKQLNFPE-UHFFFAOYSA-N thiram Chemical group CN(C)C(=S)SSC(=S)N(C)C KUAZQDVKQLNFPE-UHFFFAOYSA-N 0.000 claims description 5
- 238000000465 moulding Methods 0.000 claims description 4
- FWDBOZPQNFPOLF-UHFFFAOYSA-N ethenyl(triethoxy)silane Chemical compound CCO[Si](OCC)(OCC)C=C FWDBOZPQNFPOLF-UHFFFAOYSA-N 0.000 claims description 3
- NKSJNEHGWDZZQF-UHFFFAOYSA-N ethenyl(trimethoxy)silane Chemical compound CO[Si](OC)(OC)C=C NKSJNEHGWDZZQF-UHFFFAOYSA-N 0.000 claims description 3
- WOXXJEVNDJOOLV-UHFFFAOYSA-N ethenyl-tris(2-methoxyethoxy)silane Chemical compound COCCO[Si](OCCOC)(OCCOC)C=C WOXXJEVNDJOOLV-UHFFFAOYSA-N 0.000 claims description 3
- 230000032683 aging Effects 0.000 abstract description 8
- 230000003111 delayed effect Effects 0.000 abstract description 4
- 239000003960 organic solvent Substances 0.000 abstract description 4
- 230000035882 stress Effects 0.000 abstract description 4
- 230000002522 swelling effect Effects 0.000 abstract description 4
- 230000008961 swelling Effects 0.000 abstract description 3
- 230000007423 decrease Effects 0.000 abstract 1
- 230000007062 hydrolysis Effects 0.000 abstract 1
- 238000006460 hydrolysis reaction Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 7
- 230000008901 benefit Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 239000000428 dust Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 229920003987 resole Polymers 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000004817 gas chromatography Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0014—Use of organic additives
- C08J9/0033—Use of organic additives containing sulfur
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0014—Use of organic additives
- C08J9/0042—Use of organic additives containing silicon
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/0061—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof characterized by the use of several polymeric components
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2367/00—Characterised by the use of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Derivatives of such polymers
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2415/00—Characterised by the use of rubber derivatives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2427/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers
- C08J2427/02—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment
- C08J2427/04—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
- C08J2427/06—Homopolymers or copolymers of vinyl chloride
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/36—Sulfur-, selenium-, or tellurium-containing compounds
- C08K5/39—Thiocarbamic acids; Derivatives thereof, e.g. dithiocarbamates
- C08K5/40—Thiurams, i.e. compounds containing groups
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/54—Silicon-containing compounds
- C08K5/541—Silicon-containing compounds containing oxygen
- C08K5/5425—Silicon-containing compounds containing oxygen containing at least one C=C bond
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- Chemical & Material Sciences (AREA)
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- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a special rubber alloy elastomer for a sealing element and a preparation method thereof, and particularly relates to the technical field of rubber alloy elastomers, wherein the used raw materials (in parts by weight) comprise 50-70 parts of a thermoplastic elastomer, 40-42 parts of polyester glycol, 1-3 parts of a surface treatment agent, 1-5 parts of a processing aid, 6-10 parts of a foaming agent, 1-5 parts of an antioxidant, 4-12 parts of a hydrolysis resistant agent, 1-6 parts of a vulcanizing agent, 5-10 parts of a silane coupling agent and 5-8 parts of ammonium persulfate. According to the invention, the silane coupling agent is added, so that the crosslinking density of the special rubber alloy elastomer is large, the mechanical strength is better, the resilience is better, the sealing element made of the special rubber alloy elastomer is applied to the valve, the swelling phenomenon is reduced when the sealing element is in contact with an organic solvent, the time for gradual decline of the swelling property of the sealing element made of the special rubber alloy elastomer caused by the increase of the use frequency of the valve is delayed, the stress of the rubber alloy elastomer is improved, the aging is delayed, and the sealing performance of the valve is ensured.
Description
Technical Field
The invention relates to the technical field of rubber alloy elastomers, in particular to a special rubber alloy elastomer for a sealing element and a preparation method thereof.
Background
The seal is a material or a part that prevents fluid or solid particles from leaking from between adjacent bonding surfaces and prevents foreign substances such as dust and moisture from intruding into parts inside the machine equipment. The performance factors of various seals are different, and the mechanical seal (packing seal and the like) factors include temperature, medium, abrasion, pressure and the like. The sealing members are classified into two types according to different uses, wherein the sealing members are classified into shaft seals, hole seals, dust seals, guide rings, fixed seals and rotary seals according to the functions; the materials are divided into rubber, polyurethane, engineering plastics and the like.
Rubber elastomers used for the seal member can be classified into both thermoplastic elastomers and thermosetting elastomers, and they have elastic properties. In general, they are elastic and very suitable for use in seals in contact with fluids. However, some elastomers tend to swell, others tend to shrink. The rubber alloy elastic body material is a composite material obtained by taking a rubber material as a matrix and adding various fillers, accelerators, reinforcing agents and the like, the physical and chemical properties of the rubber alloy elastic body material are similar to those of the rubber material and are stronger than those of the rubber material, the physical and chemical properties of the rubber alloy elastic body are mainly determined by the structure and the crosslinking density of the rubber alloy elastic body, and the crosslinking density of the rubber alloy elastic body has an inseparable relationship with the tensile strength and the heat resistance of the rubber alloy elastic body.
The prior art has the following defects: when the rubber alloy elastomer is used for manufacturing a valve sealing element, the rubber alloy elastomer is in contact with an organic solvent to generate a swelling phenomenon, the use frequency of the valve is increased, the swelling property of the sealing element is gradually reduced, the stress of the rubber alloy elastomer is reduced, the aging is accelerated, and the sealing performance is reduced to cause air leakage of the valve.
Disclosure of Invention
Therefore, the invention provides a special rubber alloy elastomer for a sealing element and a preparation method thereof, and aims to solve the problems that in the prior art, when a rubber alloy elastomer is used as a valve sealing element, the rubber alloy elastomer is contacted with an organic solvent to swell, the frequency of valve use is increased, the swelling property of the sealing element is gradually reduced, the stress of the rubber alloy elastomer is reduced, the aging is accelerated, and the sealing performance is reduced to cause valve air leakage.
In order to achieve the above object, the embodiments of the present invention provide the following technical solutions: a special rubber alloy elastomer for a sealing element comprises, by weight, 50-70 parts of a thermoplastic elastomer, 40-42 parts of polyester glycol, 1-3 parts of a surface treatment agent, 1-5 parts of a processing aid, 6-10 parts of a foaming agent, 1-5 parts of an antioxidant, 4-12 parts of an anti-hydrolysis agent, 1-6 parts of a vulcanizing agent, 5-10 parts of a silane coupling agent, and 5-8 parts of ammonium persulfate.
Furthermore, the used raw materials (by weight portion) comprise 50 portions of thermoplastic elastomer, 40 portions of polyester glycol, 1 portion of surface treatment agent, 1 portion of processing aid, 6 portions of foaming agent, 1 portion of antioxidant, 4 portions of anti-hydrolysis agent, 1 portion of vulcanizing agent, 5 portions of silane coupling agent and 5 portions of ammonium persulfate.
Further, the used raw materials (by weight portion) comprise 60 portions of thermoplastic elastomer, 41 portions of polyester glycol, 2 portions of surface treatment agent, 3 portions of processing aid, 8 portions of foaming agent, 3 portions of antioxidant, 8 portions of anti-hydrolysis agent, 3.5 portions of vulcanizing agent, 7.5 portions of silane coupling agent and 6.5 portions of ammonium persulfate.
Further, the used raw materials (by weight portion) comprise 70 portions of thermoplastic elastomer, 42 portions of polyester glycol, 3 portions of surface treatment agent, 5 portions of processing aid, 10 portions of foaming agent, 5 portions of antioxidant, 12 portions of anti-hydrolysis agent, 6 portions of vulcanizing agent, 10 portions of silane coupling agent and 8 portions of ammonium persulfate.
Furthermore, the thermoplastic elastomer is formed by melting and blending polyvinyl chloride and hydrogenated nitrile rubber, and the mixing ratio of the polyvinyl chloride to the hydrogenated nitrile rubber is 1: 1.
Furthermore, the silane coupling agent is one of vinyltriethoxysilane, vinyltrimethoxysilane and vinyltris (beta-methoxyethoxy) silane.
Further, the surface treatment agent comprises polar phenolic plastics of resol type, cross-linkable by resol type, aromatic hydroxymethyl and water, and the mixing ratio is 3:1:1: 5; the processing aid is an aminosiloxane having only one primary amine group per polysiloxane molecule; the foaming agent comprises dialkyl sodium sulfate, amine oxide, water and butyl sodium naphthalene sulfonate, and the mixing ratio is 1:2:1: 1; the antioxidant is prepared by mixing polyphosphate, orthophosphate, apatite and fatty acid salt according to the ratio of 1:2:1.5: 2; the anti-hydrolysis agent is N, N' -bis (2, 6-diisopropylphenyl) carbodiimide, and the vulcanizing agent is tetramethyl thiuram disulfide.
The invention discloses a method for preparing a special rubber alloy elastomer for a sealing element, which comprises the following specific steps:
step one, drying the thermoplastic elastomer and the vulcanizing agent in a drying room at 60-70 ℃ to be soft, and then cutting and breaking the rubber into small blocks;
plasticating the small thermoplastic elastomer with polyester glycol, a surface treatment agent, a processing aid, a foaming agent, an antioxidant, an anti-hydrolysis agent, a silane coupling agent and ammonium persulfate through a plasticating machine, and putting the mixed raw materials into a rubber mixing machine for extrusion mixing after plastication;
and step three, pre-manufacturing the raw materials into dies with various shapes and different sizes by using a calender, molding and processing the raw materials, and vulcanizing to obtain the special rubber alloy elastomer.
The embodiment of the invention has the following advantages:
1. according to the invention, the silane coupling agent is added into the thermoplastic elastomer for plastication and mixing, so that the degree of volume increase among chain segments caused by the fact that solvent molecules enter gaps of a polymer chain is reduced, and the phenomenon that the volume of a polymer swells due to expansion is reduced;
2. compared with the prior art, the vulcanizing agent and the silane coupling agent are matched to improve the crosslinking rate, so that the production efficiency is improved, the tensile strength of the special rubber alloy elastomer is as high as 16.98, the maximum crosslinking density is 0.65, the heat resistance is optimal, the recovery capability of a rubber molecular chain is good, and the aging coefficient is close to an ideal coefficient 1.
Detailed Description
The present invention is described in terms of specific embodiments, and other advantages and benefits of the present invention will become apparent to those skilled in the art from the following disclosure. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
the invention discloses a special rubber alloy elastomer for a sealing element, which comprises the following raw materials (by weight part) 50-70 parts of a thermoplastic elastomer, 40-42 parts of polyester glycol, 1-3 parts of a surface treatment agent, 1-5 parts of a processing aid, 6-10 parts of a foaming agent, 1-5 parts of an antioxidant, 4-12 parts of an anti-hydrolysis agent, 1-6 parts of a vulcanizing agent, 5-10 parts of a silane coupling agent and 5-8 parts of ammonium persulfate.
And specifically in this embodiment: the used raw materials (by weight portion) comprise 50 portions of thermoplastic elastomer, 40 portions of polyester glycol, 1 portion of surface treatment agent, 1 portion of processing aid, 6 portions of foaming agent, 1 portion of antioxidant, 4 portions of anti-hydrolysis agent, 1 portion of vulcanizing agent, 5 portions of silane coupling agent and 5 portions of ammonium persulfate.
The thermoplastic elastomer is prepared by melting and blending polyvinyl chloride and hydrogenated nitrile butadiene rubber, and the mixing ratio of the polyvinyl chloride to the hydrogenated nitrile butadiene rubber is 1: 1.
The silane coupling agent is vinyl triethoxysilane.
The surface treatment agent comprises polar phenolic plastics of fusible phenolic resin, fusible phenolic resin crosslinking, aromatic hydroxymethyl and water, and the mixing ratio is 3:1:1: 5; the processing aid is an aminosiloxane having only one primary amine group per polysiloxane molecule; the foaming agent comprises dialkyl sodium sulfate, amine oxide, water and butyl sodium naphthalene sulfonate, and the mixing ratio is 1:2:1: 1; the antioxidant is prepared by mixing polyphosphate, orthophosphate, apatite and fatty acid salt according to the ratio of 1:2:1.5: 2; the anti-hydrolysis agent is N, N' -bis (2, 6-diisopropylphenyl) carbodiimide, and the vulcanizing agent is tetramethyl thiuram disulfide.
The invention discloses a method for preparing a special rubber alloy elastomer for a sealing element, which comprises the following specific steps:
step one, drying the thermoplastic elastomer and the vulcanizing agent in a drying room at 60 ℃ to be soft, and then cutting and breaking the rubber into small blocks;
plasticating the small thermoplastic elastomer with polyester glycol, a surface treatment agent, a processing aid, a foaming agent, an antioxidant, an anti-hydrolysis agent, a silane coupling agent and ammonium persulfate through a plasticating machine, and putting the mixed raw materials into a rubber mixing machine for extrusion mixing after plasticating;
and step three, pre-manufacturing the raw materials into dies with various shapes and different sizes by using a calender, molding and processing the raw materials, and vulcanizing to obtain the special rubber alloy elastomer.
Example 2:
the invention discloses a special rubber alloy elastomer for a sealing element, which comprises the following raw materials (by weight part) 50-70 parts of a thermoplastic elastomer, 40-42 parts of polyester glycol, 1-3 parts of a surface treatment agent, 1-5 parts of a processing aid, 6-10 parts of a foaming agent, 1-5 parts of an antioxidant, 4-12 parts of an anti-hydrolysis agent, 1-6 parts of a vulcanizing agent, 5-10 parts of a silane coupling agent and 5-8 parts of ammonium persulfate.
And specifically in this embodiment: the used raw materials (by weight portion) comprise 60 portions of thermoplastic elastomer, 41 portions of polyester glycol, 2 portions of surface treatment agent, 3 portions of processing aid, 8 portions of foaming agent, 3 portions of antioxidant, 8 portions of anti-hydrolysis agent, 3.5 portions of vulcanizing agent, 7.5 portions of silane coupling agent and 6.5 portions of ammonium persulfate.
The thermoplastic elastomer is prepared by melting and blending polyvinyl chloride and hydrogenated nitrile butadiene rubber, and the mixing ratio of the polyvinyl chloride to the hydrogenated nitrile butadiene rubber is 1: 1.
The silane coupling agent is vinyl trimethoxy silane.
The surface treatment agent comprises polar phenolic plastics of fusible phenolic resin, fusible phenolic resin crosslinking, aromatic hydroxymethyl and water, and the mixing ratio is 3:1:1: 5; the processing aid is an aminosiloxane having only one primary amine group per polysiloxane molecule; the foaming agent comprises dialkyl sodium sulfate, amine oxide, water and butyl sodium naphthalene sulfonate, and the mixing ratio is 1:2:1: 1; the antioxidant is prepared by mixing polyphosphate, orthophosphate, apatite and fatty acid salt according to the ratio of 1:2:1.5: 2; the anti-hydrolysis agent is N, N' -bis (2, 6-diisopropylphenyl) carbodiimide, and the vulcanizing agent is tetramethyl thiuram disulfide.
The invention discloses a method for preparing a special rubber alloy elastomer for a sealing element, which comprises the following specific steps:
step one, drying the thermoplastic elastomer and the vulcanizing agent in a drying room at 65 ℃ to be soft, cutting the rubber, and breaking the rubber into small blocks;
plasticating the small thermoplastic elastomer with polyester glycol, a surface treatment agent, a processing aid, a foaming agent, an antioxidant, an anti-hydrolysis agent, a silane coupling agent and ammonium persulfate through a plasticating machine, and putting the mixed raw materials into a rubber mixing machine for extrusion mixing after plastication;
and step three, pre-manufacturing the raw materials into dies with various shapes and different sizes by using a calender, molding and processing the raw materials, and vulcanizing to obtain the special rubber alloy elastomer.
Example 3:
the invention discloses a special rubber alloy elastomer for a sealing element, which comprises the following raw materials (by weight part) 50-70 parts of a thermoplastic elastomer, 40-42 parts of polyester glycol, 1-3 parts of a surface treatment agent, 1-5 parts of a processing aid, 6-10 parts of a foaming agent, 1-5 parts of an antioxidant, 4-12 parts of an anti-hydrolysis agent, 1-6 parts of a vulcanizing agent, 5-10 parts of a silane coupling agent and 5-8 parts of ammonium persulfate.
And specifically in this embodiment: the used raw materials (by weight portion) comprise 70 portions of thermoplastic elastomer, 42 portions of polyester glycol, 3 portions of surface treatment agent, 5 portions of processing aid, 10 portions of foaming agent, 5 portions of antioxidant, 12 portions of anti-hydrolysis agent, 6 portions of vulcanizing agent, 10 portions of silane coupling agent and 8 portions of ammonium persulfate.
The thermoplastic elastomer is prepared by melting and blending polyvinyl chloride and hydrogenated nitrile butadiene rubber, and the mixing ratio of the polyvinyl chloride to the hydrogenated nitrile butadiene rubber is 1: 1.
The silane coupling agent is vinyl tri (beta-methoxyethoxy) silane.
The surface treatment agent comprises polar phenolic plastics of fusible phenolic resin, fusible phenolic resin crosslinking, aromatic hydroxymethyl and water, and the mixing ratio is 3:1:1: 5; the processing aid is an aminosiloxane having only one primary amine group per polysiloxane molecule; the foaming agent comprises dialkyl sodium sulfate, amine oxide, water and butyl sodium naphthalene sulfonate, and the mixing ratio is 1:2:1: 1; the antioxidant is prepared by mixing polyphosphate, orthophosphate, apatite and fatty acid salt according to the ratio of 1:2:1.5: 2; the anti-hydrolysis agent is N, N' -bis (2, 6-diisopropylphenyl) carbodiimide, and the vulcanizing agent is tetramethyl thiuram disulfide.
The invention discloses a method for preparing a special rubber alloy elastomer for a sealing element, which comprises the following specific steps:
step one, drying the thermoplastic elastomer and the vulcanizing agent in a drying room at 70 ℃ to be soft, and then cutting and breaking the rubber into small blocks;
plasticating the small thermoplastic elastomer with polyester glycol, a surface treatment agent, a processing aid, a foaming agent, an antioxidant, an anti-hydrolysis agent, a silane coupling agent and ammonium persulfate through a plasticating machine, and putting the mixed raw materials into a rubber mixing machine for extrusion mixing after plastication;
and step three, pre-manufacturing dies with various shapes and different sizes by using a calender, forming and processing the raw materials, and vulcanizing to obtain the special rubber alloy elastomer.
Example 4:
the solubility of the special rubber alloy elastomers prepared in examples 1-3 and the ordinary rubber alloy elastomers of the control group were measured by reversed phase gas chromatography, and the heat resistance, tensile strength and aging coefficient were measured according to the specifications of GB-T1699-1982, GB-T1699-1982 and GB-T1699-1982, respectively.
As can be seen from the data in the above table, the solubility of the three groups of special rubber alloy elastomers in the embodiments 1 to 3 is lower than that of the control group of common rubber alloy elastomers, the sealing element made of the special rubber alloy elastomers is applied to the valve, the swelling phenomenon is reduced when the sealing element is contacted with an organic solvent, the time that the swelling property of the sealing element made of the special rubber alloy elastomers is gradually reduced due to the increase of the frequency of the use of the valve is delayed, the stress of the rubber alloy elastomer is improved, the aging is delayed, and the sealing performance of the valve is ensured, along with the increase of the vulcanizing agent, the tensile strength of the sealing element made of the special rubber alloy elastomers is increased and then reduced, the ratio of the vulcanizing agent, the silane coupling agent and the ammonium persulfate in the embodiment 2 is optimal, the tensile strength is as high as 16.98, the heat resistance is as high as 120 ℃, the crosslinking density is as high as 0.65, and the recovery capability of the rubber molecular chain is optimal, the aging factor of example 2 is the best, and the aging factor is closer to the ideal factor of 1.
Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, it is intended that all such modifications and alterations be included within the scope of this invention as defined in the appended claims.
Claims (8)
1. A special rubber alloy elastomer for sealing elements is characterized in that: the used raw materials (by weight portion) comprise 50-70 portions of thermoplastic elastomer, 40-42 portions of polyester glycol, 1-3 portions of surface treating agent, 1-5 portions of processing aid, 6-10 portions of foaming agent, 1-5 portions of antioxidant, 4-12 portions of anti-hydrolysis agent, 1-6 portions of vulcanizing agent, 5-10 portions of silane coupling agent and 5-8 portions of ammonium persulfate.
2. A special rubber alloy elastomer for a seal member according to claim 1, wherein: the used raw materials (by weight portion) comprise 50 portions of thermoplastic elastomer, 40 portions of polyester glycol, 1 portion of surface treatment agent, 1 portion of processing aid, 6 portions of foaming agent, 1 portion of antioxidant, 4 portions of anti-hydrolysis agent, 1 portion of vulcanizing agent, 5 portions of silane coupling agent and 5 portions of ammonium persulfate.
3. A special rubber alloy elastomer for a seal member as claimed in claim 1, wherein: the used raw materials (by weight portion) comprise 60 portions of thermoplastic elastomer, 41 portions of polyester glycol, 2 portions of surface treatment agent, 3 portions of processing aid, 8 portions of foaming agent, 3 portions of antioxidant, 8 portions of anti-hydrolysis agent, 3.5 portions of vulcanizing agent, 7.5 portions of silane coupling agent and 6.5 portions of ammonium persulfate.
4. A special rubber alloy elastomer for a seal member as claimed in claim 1, wherein: the used raw materials (by weight portion) comprise 70 portions of thermoplastic elastomer, 42 portions of polyester glycol, 3 portions of surface treatment agent, 5 portions of processing aid, 10 portions of foaming agent, 5 portions of antioxidant, 12 portions of anti-hydrolysis agent, 6 portions of vulcanizing agent, 10 portions of silane coupling agent and 8 portions of ammonium persulfate.
5. A special rubber alloy elastomer for a seal member as claimed in claim 1, wherein: the thermoplastic elastomer is prepared by melting and blending polyvinyl chloride and hydrogenated nitrile butadiene rubber, and the mixing ratio of the polyvinyl chloride to the hydrogenated nitrile butadiene rubber is 1: 1.
6. A special rubber alloy elastomer for a seal member as claimed in claim 1, wherein: the silane coupling agent is one of vinyl triethoxysilane, vinyl trimethoxysilane and vinyl tri (beta-methoxyethoxy) silane.
7. A special rubber alloy elastomer for a seal member according to claim 1, wherein: the surface treatment agent comprises polar phenolic plastics of fusible phenolic resin, fusible phenolic resin crosslinking, aromatic hydroxymethyl and water, and the mixing ratio is 3:1:1: 5; the processing aid is aminosiloxane having only one primary amine group per polysiloxane molecule; the foaming agent comprises dialkyl sodium sulfate, amine oxide, water and butyl sodium naphthalene sulfonate, and the mixing ratio is 1:2:1: 1; the antioxidant is prepared by mixing polyphosphate, orthophosphate, apatite and fatty acid salt according to the ratio of 1:2:1.5: 2; the anti-hydrolysis agent is N, N' -bis (2, 6-diisopropylphenyl) carbodiimide, and the vulcanizing agent is tetramethyl thiuram disulfide.
8. A method for preparing a special rubber alloy elastomer for a sealing member according to any one of claims 1 to 7, wherein: the method comprises the following specific steps:
step one, drying the thermoplastic elastomer and the vulcanizing agent in a drying room at 60-70 ℃ to be soft, and then cutting and breaking the rubber into small blocks;
plasticating the small thermoplastic elastomer with polyester glycol, a surface treatment agent, a processing aid, a foaming agent, an antioxidant, an anti-hydrolysis agent, a silane coupling agent and ammonium persulfate through a plasticating machine, and putting the mixed raw materials into a rubber mixing machine for extrusion mixing after plasticating;
and step three, pre-manufacturing the raw materials into dies with various shapes and different sizes by using a calender, molding and processing the raw materials, and vulcanizing to obtain the special rubber alloy elastomer.
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