CN105837957A - High-temperature-resistant wear-resistant ethylene propylene diene monomer rubber sealing gasket for vehicles and preparation method thereof - Google Patents

High-temperature-resistant wear-resistant ethylene propylene diene monomer rubber sealing gasket for vehicles and preparation method thereof Download PDF

Info

Publication number
CN105837957A
CN105837957A CN201610236885.4A CN201610236885A CN105837957A CN 105837957 A CN105837957 A CN 105837957A CN 201610236885 A CN201610236885 A CN 201610236885A CN 105837957 A CN105837957 A CN 105837957A
Authority
CN
China
Prior art keywords
parts
rubber
mixing
temperature
ethylene propylene
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201610236885.4A
Other languages
Chinese (zh)
Inventor
吴杰芳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Anhui Single-Minded Mechanical Means Co Ltd
Original Assignee
Anhui Single-Minded Mechanical Means Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Anhui Single-Minded Mechanical Means Co Ltd filed Critical Anhui Single-Minded Mechanical Means Co Ltd
Priority to CN201610236885.4A priority Critical patent/CN105837957A/en
Publication of CN105837957A publication Critical patent/CN105837957A/en
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/16—Elastomeric ethene-propene or ethene-propene-diene copolymers, e.g. EPR and EPDM rubbers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • 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
    • C08K2201/00—Specific properties of additives
    • C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/08—Stabilised against heat, light or radiation or oxydation
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend

Landscapes

  • Health & Medical Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Thermal Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Sealing Material Composition (AREA)
  • Gasket Seals (AREA)

Abstract

The invention discloses a high-temperature-resistant wear-resistant ethylene propylene diene monomer rubber sealing gasket for vehicles and a preparation method thereof. The sealing gasket is prepared from the following raw materials in parts by weight: 28-46 parts of ethylene propylene diene monomer rubber, 22-38 parts of boron silicone rubber, 16-32 parts of butadiene-vinyl pyridine rubber, 7-13 parts of pine tar, 4-7 parts of polytrimethyldihydroquinoline, 8-14 parts of fluoridized graphite powder, 2-4 parts of bis(1-(tert-butylperoxy)-1-methylethyl)-benzene, 10-15 parts of molybdenum disilicide, 2-3 parts of zinc dimethyl acrylate, 1-2 parts of di-o-tolyl guanidine, 12-16 parts of andalusite powder, 5-8 parts of terpene phenolic resin, 6-9 parts of acetyl tributyl citrate, 5-10 parts of boron phosphate, 2-3 parts of N,N'-diphenyl-para-phenylene diamine and 11-13 parts of modifier. The prepared sealing gasket has the advantages of excellent high-temperature resistance, excellent wear resistance, high durability and high safety and reliability, and can be used as a sealing material under high-temperature high-friction conditions in automobile industry.

Description

A kind of vehicle high-temperature resistant wear-resisting EPT rubber packing rubber cushion and preparation method thereof
Technical field
The present invention relates to a kind of rubber gasket, be specifically related to a kind of vehicle high-temperature resistant wear-resisting EPT rubber packing glue Pad and preparation method thereof.
Background technology
Ethylene propylene diene rubber (EPDM) is with ethene and propylene as primary raw material, and exists with a small amount of non-conjugated diene hydrocarbon A kind of general purpose synthetic rubber with low-unsaturation-degree being polymerized under Zeigler-Netta catalyst action.Because having height The chemical stability of degree, the electrical insulation capability of good resistance to ozone, Weather-resistant, resistance to oxidation, erosion-resisting characteristics and excellence, Can be widely used for the fields such as automobile sealing gasket.Along with science and technology and the fast development of industry, to EPT rubber packing material The performance requirement of material is more and more higher, and the EPT rubber packing pad on existing market also exists the shortcoming of oil resistivity difference, causes Its service life is short, it is impossible to meet the demand in market.
Summary of the invention
Present invention aims to the deficiencies in the prior art, it is provided that a kind of wear-resisting ethylene propylene diene rubber of vehicle high-temperature resistant Seal gasket and preparation method thereof.
For achieving the above object, the present invention adopts the following technical scheme that
A kind of vehicle high-temperature resistant wear-resisting EPT rubber packing rubber cushion, is made up of the raw material of following weight portion: ternary second Third rubber 28-46, boron-silicon rubber 22-38, butadiene-vinylpyridine rubber 16-32, pine tar 7-13, poly-trimethyldihydroquinoline 4-7, fluorination stone Ink powder 8-14, dual-tert-butyl peroxy isopropyl base benzene 2-4, molybdenum disilicide 10-15, zinc dimethacrylate 2-3, di-o-tolylguanidine 1- 2, andalusite powder 12-16, terpene phenolic resin 5-8, tributyl 2-acetylcitrate 6-9, boron phosphate 5-10, N, N '-diphenyl pair Phenylenediamine 2-3, modifying agent 11-13；
The preparation method of described modifying agent is as follows: (1) takes the raw material of following weight portion: blast furnace water quenching slag 15-20, titanium carbide 12-18, aluminum-spinel 10-15, silicon boride 9-14, sodium cocoyl methyl sodium taurocholate 2-3,1-isobutyl-3,5-dimethylhexylphosphoric acid glycine betaine 1.5-2.5, glucose GAG 1-2, tallow amine APEO 4-7, Jojoba acid polyoxypropylene ester 3-6, sorbierite are poly- Oxygen vinethene four oleate 2-5；(2) take blast furnace water quenching slag, aluminum-spinel, titanium carbide, silicon boride mixing, pulverize, cross 100- 150 mesh sieves, the stirring that then adds water is made the suspension of 40-50%, is added sodium cocoyl methyl sodium taurocholate, dodecyl phosphorus Acid esters glycine betaine, glucose GAG, heating water bath to 55-70 DEG C, 2000-3000r/min high-speed stirred 8-12min, mistake Filter, adds tallow amine APEO, Jojoba acid polyoxypropylene ester, sorbitol polyoxyethylene ether four oleate after drying, 1500-2500r/min high-speed stirred 4-8min, dries, and pulverizes, and crosses 100-150 mesh sieve.
The preparation method of a kind of vehicle high-temperature resistant wear-resisting EPT rubber packing rubber cushion, comprises the following steps:
(1) boron-silicon rubber, butadiene-vinylpyridine rubber, poly-trimethyldihydroquinoline, terpene phenolic resin are added in mixing roll, adjust Roller temperature is to 45-55 DEG C, and roll spacing, to 2-3mm, adds molybdenum disilicide, boron phosphate, di-o-tolylguanidine, acetyl lemon after mixing 3-6min Acid tributyl, adjust roller temperature to 40-50 DEG C, roll spacing to 3-4mm, mixing 4-8min, discharging, park 12-24h；
(2) ethylene propylene diene rubber, zinc dimethacrylate, fluorographite powder, andalusite powder are added in mixing roll, adjust Roller temperature is to 40-50 DEG C, and roll spacing, to 2-3mm, adds dual-tert-butyl peroxy isopropyl base benzene, pine tar and step after mixing 5-7min (1) sizing material obtained, adjustment roller temperature is to 50-60 DEG C, and roll spacing, to 1-2mm, adds remaining raw material, adjusts roller temperature after mixing 4-6min To 45-55 DEG C, roll spacing to 2-3mm, mixing 3-5min, discharging, park 12-24h；
(3) carrying out sulfidization molding in the above-mentioned sizing material mixed being sent into vulcanizing press, sulfide stress is 1.5- 2.5MPa, curing temperature 180-220 DEG C, cure time 15-25min；
(4) rubber of above-mentioned sulfuration is taken out finishing burr, finished product can be become through passer.
Above-mentioned modifying agent uses blast furnace water quenching slag, titanium carbide, aluminum-spinel, four kinds of inorganic raw materials of silicon boride to be combined and makes With, the corrosion resistance of sealing gasket, mar proof, thermal shock resistance, heat-resisting quantity and impact resistance can be improved, use simultaneously Sodium cocoyl methyl sodium taurocholate, 1-isobutyl-3,5-dimethylhexylphosphoric acid glycine betaine, glucose GAG, tallow amine APEO, suddenly Bar acid polyoxypropylene ester, sorbitol polyoxyethylene ether four oleate carry out twice modification to above-mentioned inorganic raw material suddenly, permissible Significantly improve its interface performance, improve the compatibility of itself and polymer matrix, thus improve it and strengthen performance.
Beneficial effects of the present invention:
The present invention uses boron-silicon rubber, two kinds of rubber of butadiene-vinylpyridine rubber that ethylene propylene diene rubber is carried out blending and modifying, Ke Yiti The heat-resisting quantity of high EPT rubber packing pad, the fluorographite powder simultaneously added, molybdenum disilicide and andalusite powder, Ke Yigai The heat endurance of kind EPT rubber packing pad and wearability.The sealing gasket that the present invention prepares have excellence heat-resisting quantity and Wearability, may be used for the encapsulant under the friction of automobile industry high temperature height, durable in use, safe and reliable.
Detailed description of the invention
A kind of vehicle high-temperature resistant wear-resisting EPT rubber packing rubber cushion, is made up of the raw material of following weight (kg): ternary EP rubbers 38, boron-silicon rubber 32, butadiene-vinylpyridine rubber 26, pine tar 11, poly-trimethyldihydroquinoline 6, fluorographite powder 12, double uncle Butylperoxyisopropyl benzene 3, molybdenum disilicide 12, zinc dimethacrylate 2.5, di-o-tolylguanidine 1.5, andalusite powder 14, terpenes Phenolic resin 6, tributyl 2-acetylcitrate 7, boron phosphate 8, N, N '-diphenyl-para-phenylene diamine 2.5, modifying agent 12；
The preparation method of described modifying agent is as follows: (1) takes the raw material of following weight (kg): blast furnace water quenching slag 18, titanium carbide 16, aluminum-spinel 12, silicon boride 11, sodium cocoyl methyl sodium taurocholate 2.5,1-isobutyl-3,5-dimethylhexylphosphoric acid glycine betaine 2, glucose ammonia Base glucan 1.5, tallow amine APEO 6, Jojoba acid polyoxypropylene ester 4.5, sorbitol polyoxyethylene ether four oleate 3；(2) taking blast furnace water quenching slag, aluminum-spinel, titanium carbide, silicon boride mixing, pulverize, cross 100 mesh sieves, then add water stirring system Become 50% suspension, add sodium cocoyl methyl sodium taurocholate, 1-isobutyl-3,5-dimethylhexylphosphoric acid glycine betaine, glucose amino Portugal gather Sugar, heating water bath to 65 DEG C, 2500r/min high-speed stirred 10min, filter, after drying add tallow amine APEO, flash Bar acid polyoxypropylene ester, sorbitol polyoxyethylene ether four oleate, 1500r/min high-speed stirred 8min, dry, pulverize, cross 100 Mesh sieve.
The preparation method of a kind of vehicle high-temperature resistant wear-resisting EPT rubber packing rubber cushion, comprises the following steps:
(1) boron-silicon rubber, butadiene-vinylpyridine rubber, poly-trimethyldihydroquinoline, terpene phenolic resin are added in mixing roll, adjust Roller temperature is to 45-55 DEG C, and roll spacing, to 2-3mm, adds molybdenum disilicide, boron phosphate, di-o-tolylguanidine, acetyl lemon after mixing 3-6min Acid tributyl, adjust roller temperature to 40-50 DEG C, roll spacing to 3-4mm, mixing 4-8min, discharging, park 12-24h；
(2) ethylene propylene diene rubber, zinc dimethacrylate, fluorographite powder, andalusite powder are added in mixing roll, adjust Roller temperature is to 40-50 DEG C, and roll spacing, to 2-3mm, adds dual-tert-butyl peroxy isopropyl base benzene, pine tar and step after mixing 5-7min (1) sizing material obtained, adjustment roller temperature is to 50-60 DEG C, and roll spacing, to 1-2mm, adds remaining raw material, adjusts roller temperature after mixing 4-6min To 45-55 DEG C, roll spacing to 2-3mm, mixing 3-5min, discharging, park 12-24h；
(3) carrying out sulfidization molding in the above-mentioned sizing material mixed being sent into vulcanizing press, sulfide stress is 1.5- 2.5MPa, curing temperature 180-220 DEG C, cure time 15-25min；
(4) rubber of above-mentioned sulfuration is taken out finishing burr, finished product can be become through passer.
The main performance testing result of the sealing gasket that above-described embodiment prepares is as shown in the table.

Claims (2)

1. a vehicle high-temperature resistant wear-resisting EPT rubber packing rubber cushion, it is characterised in that by the raw material system of following weight portion Become: ethylene propylene diene rubber 28-46, boron-silicon rubber 22-38, butadiene-vinylpyridine rubber 16-32, pine tar 7-13, poly-trimethyl dihydro Quinoline 4-7, fluorographite powder 8-14, dual-tert-butyl peroxy isopropyl base benzene 2-4, molybdenum disilicide 10-15, dimethacrylate Zinc 2-3, di-o-tolylguanidine 1-2, andalusite powder 12-16, terpene phenolic resin 5-8, tributyl 2-acetylcitrate 6-9, phosphoric acid Boron 5-10, N, N '-diphenyl-para-phenylene diamine 2-3, modifying agent 11-13；
The preparation method of described modifying agent is as follows: (1) takes the raw material of following weight portion: blast furnace water quenching slag 15-20, titanium carbide 12- 18, aluminum-spinel 10-15, silicon boride 9-14, sodium cocoyl methyl sodium taurocholate 2-3,1-isobutyl-3,5-dimethylhexylphosphoric acid glycine betaine 1.5-2.5, glucose GAG 1-2, tallow amine APEO 4-7, Jojoba acid polyoxypropylene ester 3-6, sorbierite APEO four oleate 2-5；(2) take blast furnace water quenching slag, aluminum-spinel, titanium carbide, silicon boride mixing, pulverize, mistake 100-150 mesh sieve, the stirring that then adds water is made the suspension of 40-50%, is added sodium cocoyl methyl sodium taurocholate, dodecane Base phosphate glycine betaine, glucose GAG, heating water bath to 55-70 DEG C, 2000-3000r/min high-speed stirred 8- 12min, filters, and adds tallow amine APEO, Jojoba acid polyoxypropylene ester, sorbitol polyoxyethylene ether four oil after drying Acid esters, 1500-2500r/min high-speed stirred 4-8min, dry, pulverize, cross 100-150 mesh sieve.
The preparation method of vehicle high-temperature resistant the most according to claim 1 wear-resisting EPT rubber packing rubber cushion, its feature It is, comprises the following steps:
Boron-silicon rubber, butadiene-vinylpyridine rubber, poly-trimethyldihydroquinoline, terpene phenolic resin are added in mixing roll, adjusts roller temperature extremely 45-55 DEG C, roll spacing, to 2-3mm, adds molybdenum disilicide, boron phosphate, di-o-tolylguanidine, acetyl tributyl citrate three fourth after mixing 3-6min Ester, adjust roller temperature to 40-50 DEG C, roll spacing to 3-4mm, mixing 4-8min, discharging, park 12-24h；
Ethylene propylene diene rubber, zinc dimethacrylate, fluorographite powder, andalusite powder are added in mixing roll, adjusts roller temperature extremely 40-50 DEG C, roll spacing, to 2-3mm, adds dual-tert-butyl peroxy isopropyl base benzene, pine tar and step (1) and obtains after mixing 5-7min The sizing material arrived, adjustment roller temperature is to 50-60 DEG C, and roll spacing, to 1-2mm, adds remaining raw material, adjustment roller temperature to 45-after mixing 4-6min 55 DEG C, roll spacing to 2-3mm, mixing 3-5min, discharging, park 12-24h；
(3) carrying out sulfidization molding in the above-mentioned sizing material mixed being sent into vulcanizing press, sulfide stress is 1.5-2.5MPa, sulphur Change temperature 180-220 DEG C, cure time 15-25min；
(4) rubber of above-mentioned sulfuration is taken out finishing burr, finished product can be become through passer.
CN201610236885.4A 2016-04-14 2016-04-14 High-temperature-resistant wear-resistant ethylene propylene diene monomer rubber sealing gasket for vehicles and preparation method thereof Pending CN105837957A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610236885.4A CN105837957A (en) 2016-04-14 2016-04-14 High-temperature-resistant wear-resistant ethylene propylene diene monomer rubber sealing gasket for vehicles and preparation method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610236885.4A CN105837957A (en) 2016-04-14 2016-04-14 High-temperature-resistant wear-resistant ethylene propylene diene monomer rubber sealing gasket for vehicles and preparation method thereof

Publications (1)

Publication Number Publication Date
CN105837957A true CN105837957A (en) 2016-08-10

Family

ID=56589713

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610236885.4A Pending CN105837957A (en) 2016-04-14 2016-04-14 High-temperature-resistant wear-resistant ethylene propylene diene monomer rubber sealing gasket for vehicles and preparation method thereof

Country Status (1)

Country Link
CN (1) CN105837957A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109021332A (en) * 2018-05-25 2018-12-18 安徽新创智能科技有限公司 A kind of shared bicycle high tenacity tire material and preparation method
CN110185713A (en) * 2019-07-10 2019-08-30 贝德科技有限公司 A kind of Diesel engine pump check shaft coupling
CN117683282A (en) * 2024-02-02 2024-03-12 北京超智控信科技有限公司 Self-melting cladding insulating material for electrified railway positive feeder

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101402763A (en) * 2008-11-07 2009-04-08 安徽中鼎密封件股份有限公司 Car engine cooling system heat radiator plate-type rubber seal strip assembly and manufacturing process thereof
CN102617939A (en) * 2012-03-29 2012-08-01 无锡朴业橡塑有限公司 High-temperature-resistant sealing gasket for automobiles

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101402763A (en) * 2008-11-07 2009-04-08 安徽中鼎密封件股份有限公司 Car engine cooling system heat radiator plate-type rubber seal strip assembly and manufacturing process thereof
CN102617939A (en) * 2012-03-29 2012-08-01 无锡朴业橡塑有限公司 High-temperature-resistant sealing gasket for automobiles

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109021332A (en) * 2018-05-25 2018-12-18 安徽新创智能科技有限公司 A kind of shared bicycle high tenacity tire material and preparation method
CN110185713A (en) * 2019-07-10 2019-08-30 贝德科技有限公司 A kind of Diesel engine pump check shaft coupling
CN117683282A (en) * 2024-02-02 2024-03-12 北京超智控信科技有限公司 Self-melting cladding insulating material for electrified railway positive feeder
CN117683282B (en) * 2024-02-02 2024-04-09 北京超智控信科技有限公司 Self-melting cladding insulating material for electrified railway positive feeder

Similar Documents

Publication Publication Date Title
CN103013134B (en) A kind of Automobile engine fluorosilicone sealing-ring sizing material and preparation method thereof
CN102167213B (en) High-temperature-resistant conveyor belt
CN102250393B (en) Strengthened and heat-conducting rubber for heavy truck tire shoulder
CN102604167B (en) Preparation method of vulcanized rubber
CN105837957A (en) High-temperature-resistant wear-resistant ethylene propylene diene monomer rubber sealing gasket for vehicles and preparation method thereof
CN102634078B (en) Tire shoulder pad rubber composition
CN106867076A (en) A kind of mining Graphene enhancing dual anti-tubing preparation method of ultra-high molecular weight polyethylene
CN107298778A (en) A kind of high temperature resistant butyronitrile rubber seal
CN109651662A (en) A kind of friction facing and its brake block of preparation
CN103044927B (en) Piston sizing material for slurry pump and preparation method thereof
CN105694153B (en) A kind of agricultural tyre sidewall rubber of high filling tyre reclaim
CN110577707A (en) Ethylene propylene diene monomer rubber for automobile hydraulic brake pipe and preparation method thereof
CN110903562A (en) EPDM rubber material for high-strength high-temperature-resistant low-compression-set automobile lifting lug
CN102634082B (en) Tire tread base rubber composition and preparation method
CN104448429B (en) A kind of preparation method of automobile air spring-rubber air bag matrix material
CN103044926A (en) Oil seal rubber material for automobile engines and preparation method thereof
CN101439946B (en) Preparation of modified rubber asphalt mixture
CN114437465B (en) Ethylene propylene diene monomer agricultural machinery belt with high self-adhesion and preparation process thereof
CN105860370A (en) Anti-aging and high-and-low-temperature-resistant fluororubber sealing gasket and preparation method thereof
CN109824966B (en) Wear-resistant oil-resistant engineering sole material and preparation method thereof
CN106084495A (en) A kind of automobile refrigeration system EPT rubber packing pad and preparation method thereof
CN107446160B (en) Functionalization montmorillonite Reinforced PVC/NBR elastic body sealing strip and preparation method thereof
CN107325549B (en) Yellowing-resistant reinforced nylon 66 material and preparation method thereof
CN111333966B (en) High-temperature-resistant and high-bonding-strength EPDM rubber material and preparation method thereof
CN105524387A (en) Nano-chromium-diboride-containing high-strength electric power sealing gasket and preparation method thereof

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
RJ01 Rejection of invention patent application after publication

Application publication date: 20160810

RJ01 Rejection of invention patent application after publication