CN109337347A - A kind of environmental protection Medical rubber plug composite material and preparation method - Google Patents
A kind of environmental protection Medical rubber plug composite material and preparation method Download PDFInfo
- Publication number
- CN109337347A CN109337347A CN201811181655.8A CN201811181655A CN109337347A CN 109337347 A CN109337347 A CN 109337347A CN 201811181655 A CN201811181655 A CN 201811181655A CN 109337347 A CN109337347 A CN 109337347A
- Authority
- CN
- China
- Prior art keywords
- parts
- rubber
- composite material
- tank body
- sulphur
- 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.)
- Withdrawn
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L75/00—Compositions of polyureas or polyurethanes; Compositions of derivatives of such polymers
- C08L75/04—Polyurethanes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/02—Applications for biomedical use
-
- 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
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
-
- 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
- Chemical & Material Sciences (AREA)
- 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 kind of environmentally friendly Medical rubber plug composite material, raw material poidometer by weight is as follows: 53-58 parts of compounded rubber powder, 20-27 parts of sulphur, 23-25 parts of N330 high wear-resistant carbon black, 12-16 parts of cross-linking aid, 10-13 parts of filler, 5-9 parts of compounding agent, 2-8 parts of stearic acid, 1-4 parts of haloflex, 2-8 parts of N tert butyl benzothiazole 2 sulfenamide, 5-9 parts of magnesia, 5-8 parts of epoxy resin, 13-16 parts of precipitated calcium carbonate, 1-5 parts of zinc stearate.A kind of environmentally friendly Medical rubber plug composite material and preparation method provided by the invention, the preparation method is simple, easily implements;Exudate, the volatile matter etc. of pollution are not generated;Using Na22 and MD as promotor, constitutes sulfurless curing system and without sulphur promotion system, do not contain sulphur in component, avoid the pollution of sulphur;Rubber is composite material, and the performance of corrosion resistance and ageing resistance is strong, extends the service life of rubber stopper.
Description
Technical field
The present invention relates to environmentally friendly Medical rubber plug technical field of composite materials more particularly to a kind of environmentally friendly Medical rubber plugs
Use composite material and preparation method.
Background technique
With the development of society, the rubber product type for being applied to medicine and hygiene fields is more and more, such as various glue,medicinals
Plug, asepsis injector piston, syringe sealant sealing, hose, conduit, sealing element, valve, baby nipple, tube for blood transfusion,latex etc..
Wherein rubber stopper is the important component of bottled sealing material in Key works Drug packing, and halogenated butyl rubber has curingprocess rate
Fastly, the features such as air-tightness is good, heat-resist, thus it is long-term for making bottled medicine rubber plug.But with society development and into
Step, halogenated butyl rubber plug is no longer satisfied the demand of each similar drug, is easy to thermo-oxidative ageing and the bad defect of fungistatic effect.
Summary of the invention
The purpose of the present invention is to solve disadvantages existing in the prior art, and a kind of environmentally friendly Medical rubber plug proposed
Use composite material and preparation method.
To achieve the goals above, present invention employs following technical solutions:
A kind of environmental protection Medical rubber plug composite material, raw material poidometer by weight are as follows: compounded rubber powder 53-58
Part, 20-27 parts of sulphur, 23-25 parts of N330 high wear-resistant carbon black, 12-16 parts of cross-linking aid, 10-13 parts of filler, 5-9 parts of compounding agent,
2-8 parts of stearic acid, 1-4 parts of haloflex, 2-8 parts of N tert butyl benzothiazole 2 sulfenamide, 5-9 parts of magnesia, epoxy
5-8 parts of resin, 13-16 parts of precipitated calcium carbonate, 1-5 parts of zinc stearate.
Preferably, the compounded rubber powder includes butadiene-styrene rubber, halogenated butyl rubber, nitrile rubber, isoprene rubber, propylene
Acid esters rubber, butadiene-vinylpyridine rubber, silicon rubber, polyurethane rubber.
Preferably, the butadiene-styrene rubber, halogenated butyl rubber, nitrile rubber, isoprene rubber, acrylic rubber, fourth pyrrole
Rubber, silicon rubber and polyurethane rubber poidometer by weight are as follows: 12-16 parts of butadiene-styrene rubber, halogenated butyl rubber
20-23 parts, 18-23 parts of nitrile rubber, 6-9 parts of isoprene rubber, 5-9 parts of acrylic rubber, 9-13 parts of butadiene-vinylpyridine rubber, silicon rubber
5-8 parts, 23-27 parts of polyurethane rubber.
Preferably, the cross-linking aid polyfunctional group cross-linking aid, filler are the mixing of clay, clay, mica and graphite
Object.
Preferably, compounding agent poidometer by weight is as follows: 264 3-6 parts of anti-aging agents, 23-50 parts of talcum powder, cycloalkanes
12-20 parts oily, 12-13 parts of resin curative HY-2056 resin, 1-3 parts of accelerant N a22,2-5 parts of altax.
A kind of preparation method of environmental protection Medical rubber plug composite material, includes the following steps:
S1: iron filings and impurity will be removed to the compounded rubber powder of vulcanizing treatment electromagnetic method, rubber powder is then crossed into 10-
The sieve of 180 mesh;
S2, masticator is preheated, preheating temperature is to 120-150 DEG C, then wherein by compounded rubber powder investment, in 160-
180 DEG C of refining 5-7min;
S3, by sulphur, high wear-resistant carbon black, filler, stearic acid, haloflex, N- tert-butyl -2-[4-morpholinodithio time sulphonyl
Amine, magnesia, epoxy resin, precipitated calcium carbonate, zinc stearate are sequentially added in blender and are stirred evenly, then with compounded rubber
Powder, cross-linking aid and compounding agent are added into masticator together, 200-210 DEG C of refining 8-16min, then put into adjuvant, 180-
190 DEG C of refining 5-8min;
S4, by be kneaded tank body preheat, by mixed material be kneaded tank body in carry out be kneaded formed it is uncrosslinked medical
Rubber profile, and 180-250 DEG C of steam is passed through to being kneaded in tank body by air inlet pipe, and keep in tank body pressure in 1-
4MPa stops being passed through steam into tank body, opens the valve of nitrogen inlet duct, nitrogen is passed through into tank body after reacting 120min,
150 DEG C or less stoppings, which are cooled to, to vulcanizing tank is passed through nitrogen;
S5, most afterwards through injection molding machine injection molding, be placed in baking oven dry, be immersed in after demoulding in saturation quaternary ammonium salt solution,
It then takes out, is sufficiently rinsed and dried with deionized water.
Compared with prior art, the beneficial effects of the present invention are: a kind of environmentally friendly Medical rubber plug provided by the invention is with again
Condensation material and preparation method thereof, the preparation method is simple, easily implements;Exudate, the volatile matter etc. of pollution are not generated;
Using Na22 and MD as promotor, constitutes sulfurless curing system and without sulphur promotion system, does not contain sulphur in component,
Avoid the pollution of sulphur;
Rubber is composite material, and the performance of corrosion resistance and ageing resistance is strong, extends the service life of rubber stopper.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, below in conjunction with specific embodiment, to this
Invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, not
For limiting the present invention.
Embodiment 1
A kind of environmental protection Medical rubber plug composite material, raw material poidometer by weight are as follows: 53 parts of compounded rubber powder,
20 parts of sulphur, 25 parts of N330 high wear-resistant carbon black, 12 parts of cross-linking aid, 10 parts of filler, 5 parts of compounding agent, 5 parts of stearic acid, chlorination are poly-
2 parts of ethylene, 5 parts of N tert butyl benzothiazole 2 sulfenamide, 5 parts of magnesia, 5 parts of epoxy resin, 15 parts of precipitated calcium carbonate,
3 parts of zinc stearate.
Specifically, the compounded rubber powder includes butadiene-styrene rubber, halogenated butyl rubber, nitrile rubber, isoprene rubber, propylene
Acid esters rubber, butadiene-vinylpyridine rubber, silicon rubber, polyurethane rubber.
Specifically, the butadiene-styrene rubber, halogenated butyl rubber, nitrile rubber, isoprene rubber, acrylic rubber, fourth pyrrole
Rubber, silicon rubber and polyurethane rubber poidometer by weight are as follows: 12 parts of butadiene-styrene rubber, halogenated butyl rubber 20
Part, 18 parts of nitrile rubber, 9 parts of isoprene rubber, 5 parts of acrylic rubber, 13 parts of butadiene-vinylpyridine rubber, 8 parts of silicon rubber, polyurethane
25 parts of ester rubber.
Specifically, the cross-linking aid polyfunctional group cross-linking aid, filler is the mixing of clay, clay, mica and graphite
Object.
Specifically, compounding agent poidometer by weight is as follows: 264 5 parts of anti-aging agents, 30 parts of talcum powder, naphthenic oil 20
Part, 12-13 parts of resin curative HY-2056 resin, 2 parts of accelerant N a22,5 parts of altax.
A kind of preparation method of environmental protection Medical rubber plug composite material, includes the following steps:
S1: iron filings and impurity will be removed to the compounded rubber powder of vulcanizing treatment electromagnetic method, rubber powder is then crossed into 10-
The sieve of 180 mesh;
S2, masticator is preheated, then wherein by compounded rubber powder investment preheating temperature, is refined to 120 DEG C at 160 DEG C
5min;
S3, by sulphur, high wear-resistant carbon black, filler, stearic acid, haloflex, N- tert-butyl -2-[4-morpholinodithio time sulphonyl
Amine, magnesia, epoxy resin, precipitated calcium carbonate, zinc stearate are sequentially added in blender and are stirred evenly, then with compounded rubber
Powder, cross-linking aid and compounding agent are added into masticator together, 200 DEG C of refining 16min, then put into adjuvant, 190 DEG C of refinings
8min;
S4, by be kneaded tank body preheat, by mixed material be kneaded tank body in carry out be kneaded formed it is uncrosslinked medical
Rubber profile, and 250 DEG C of steam is passed through into mixing tank body by air inlet pipe, and pressure in tank body is kept to react in 4MPa
After 120min, stop being passed through steam into tank body, opens the valve of nitrogen inlet duct, nitrogen is passed through into tank body, to vulcanizing tank
It is cooled to 150 DEG C or less stoppings and is passed through nitrogen;
S5, most afterwards through injection molding machine injection molding, be placed in baking oven dry, be immersed in after demoulding in saturation quaternary ammonium salt solution,
It then takes out, is sufficiently rinsed and dried with deionized water.
Embodiment 2
A kind of environmental protection Medical rubber plug composite material, raw material poidometer by weight are as follows: 58 parts of compounded rubber powder,
25 parts of sulphur, 25 parts of N330 high wear-resistant carbon black, 15 parts of cross-linking aid, 12 parts of filler, 6 parts of compounding agent, 5 parts of stearic acid, chlorination are poly-
3 parts of ethylene, 5 parts of N tert butyl benzothiazole 2 sulfenamide, 9 parts of magnesia, 8 parts of epoxy resin, 16 parts of precipitated calcium carbonate,
5 parts of zinc stearate.
Specifically, the compounded rubber powder includes butadiene-styrene rubber, halogenated butyl rubber, nitrile rubber, isoprene rubber, propylene
Acid esters rubber, butadiene-vinylpyridine rubber, silicon rubber, polyurethane rubber.
Specifically, the butadiene-styrene rubber, halogenated butyl rubber, nitrile rubber, isoprene rubber, acrylic rubber, fourth pyrrole
Rubber, silicon rubber and polyurethane rubber poidometer by weight are as follows: 15 parts of butadiene-styrene rubber, halogenated butyl rubber 20
Part, 23 parts of nitrile rubber, 9 parts of isoprene rubber, 9 parts of acrylic rubber, 13 parts of butadiene-vinylpyridine rubber, 8 parts of silicon rubber, polyurethane
27 parts of ester rubber.
Specifically, the cross-linking aid polyfunctional group cross-linking aid, filler is the mixing of clay, clay, mica and graphite
Object.
Specifically, compounding agent poidometer by weight is as follows: 264 6 parts of anti-aging agents, 45 parts of talcum powder, naphthenic oil 18
Part, 13 parts of resin curative HY-2056 resin, 3 parts of accelerant N a22,5 parts of altax.
A kind of preparation method of environmental protection Medical rubber plug composite material, includes the following steps:
S1: iron filings and impurity will be removed to the compounded rubber powder of vulcanizing treatment electromagnetic method, rubber powder is then crossed 100
Purpose sieve;
S2, masticator is preheated, then wherein by compounded rubber powder investment preheating temperature, is refined to 150 DEG C at 180 DEG C
7min;
S3, by sulphur, high wear-resistant carbon black, filler, stearic acid, haloflex, N- tert-butyl -2-[4-morpholinodithio time sulphonyl
Amine, magnesia, epoxy resin, precipitated calcium carbonate, zinc stearate are sequentially added in blender and are stirred evenly, then with compounded rubber
Powder, cross-linking aid and compounding agent are added into masticator together, 210 DEG C of refining 16min, then put into adjuvant, 190 DEG C of refinings
8min;
S4, by be kneaded tank body preheat, by mixed material be kneaded tank body in carry out be kneaded formed it is uncrosslinked medical
Rubber profile, and 250 DEG C of steam is passed through into mixing tank body by air inlet pipe, and pressure in tank body is kept to react in 3MPa
After 120min, stop being passed through steam into tank body, opens the valve of nitrogen inlet duct, nitrogen is passed through into tank body, to vulcanizing tank
It is cooled to 150 DEG C or less stoppings and is passed through nitrogen;
S5, most afterwards through injection molding machine injection molding, be placed in baking oven dry, be immersed in after demoulding in saturation quaternary ammonium salt solution,
It then takes out, is sufficiently rinsed and dried with deionized water.
A kind of environmentally friendly Medical rubber plug composite material and preparation method provided by the invention, the preparation method is simple,
Easily implement;Exudate, the volatile matter etc. of pollution are not generated;
Using Na22 and MD as promotor, constitutes sulfurless curing system and without sulphur promotion system, does not contain sulphur in component,
Avoid the pollution of sulphur;
Rubber is composite material, and the performance of corrosion resistance and ageing resistance is strong, extends the service life of rubber stopper.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (6)
1. a kind of environmental protection Medical rubber plug composite material, it is characterised in that: its raw material poidometer by weight is as follows: compound rubber
53-58 parts of rubber powder, 23-25 parts of N330 high wear-resistant carbon black, 12-16 parts of cross-linking aid, 10-13 parts of filler, is matched at 20-27 parts of sulphur
5-9 parts of mixture, 2-8 parts of stearic acid, 1-4 parts of haloflex, 2-8 parts of N tert butyl benzothiazole 2 sulfenamide, magnesia
5-9 parts, 5-8 parts of epoxy resin, 13-16 parts of precipitated calcium carbonate, 1-5 parts of zinc stearate.
2. a kind of environmentally friendly Medical rubber plug composite material according to claim 1, it is characterised in that: the compounded rubber
Powder includes butadiene-styrene rubber, halogenated butyl rubber, nitrile rubber, isoprene rubber, acrylic rubber, butadiene-vinylpyridine rubber, silicon rubber, gathers
Urethane rubber.
3. a kind of environmentally friendly Medical rubber plug composite material according to claim 2, it is characterised in that: the butylbenzene rubber
Glue, halogenated butyl rubber, nitrile rubber, isoprene rubber, acrylic rubber, butadiene-vinylpyridine rubber, silicon rubber and polyurethanes
Rubber poidometer by weight is as follows: 12-16 parts of butadiene-styrene rubber, 20-23 parts of halogenated butyl rubber, 18-23 parts of nitrile rubber, different
Penta 6-9 parts of rubber, 5-9 parts of acrylic rubber, 9-13 parts of butadiene-vinylpyridine rubber, 5-8 parts of silicon rubber, polyurethane rubber 23-
27 parts.
4. a kind of environmentally friendly Medical rubber plug composite material according to claim 1, it is characterised in that: the cross-linking aid
Polyfunctional group cross-linking aid, filler are the mixture of clay, clay, mica and graphite.
5. a kind of environmentally friendly Medical rubber plug composite material according to claim 1, it is characterised in that: the compounding agent is pressed
Parts by weight poidometer is as follows: 264 3-6 parts of anti-aging agents, 23-50 parts of talcum powder, 12-20 parts of naphthenic oil, resin curative HY-2056
12-13 parts of resin, 1-3 parts of accelerant N a22,2-5 parts of altax.
6. a kind of preparation method of environmentally friendly Medical rubber plug composite material described in claim 1, it is characterised in that: including such as
Lower step:
S1: iron filings and impurity will be removed to the compounded rubber powder of vulcanizing treatment electromagnetic method, rubber powder is then crossed into 10-180
Purpose sieve;
S2, masticator is preheated, preheating temperature is to 120-150 DEG C, then wherein by compounded rubber powder investment, at 160-180 DEG C
Refine 5-7min;
S3, by sulphur, high wear-resistant carbon black, filler, stearic acid, haloflex, N tert butyl benzothiazole 2 sulfenamide,
Magnesia, epoxy resin, precipitated calcium carbonate, zinc stearate are sequentially added in blender and are stirred evenly, then with compounded rubber powder, hand over
Connection auxiliary agent and compounding agent are added into masticator together, 200-210 DEG C of refining 8-16min, then put into adjuvant, and 180-190 DEG C
Refine 5-8min;
S4, mixing tank body is preheated, mixed material is carried out being kneaded in being kneaded tank body to form uncrosslinked medical grade rubber
Profile, and 180-250 DEG C of steam is passed through to being kneaded in tank body by air inlet pipe, and keep in tank body that pressure is in 1-4MPa, instead
After answering 120min, stop being passed through steam into tank body, opens the valve of nitrogen inlet duct, nitrogen is passed through into tank body, wait vulcanize
Tank is cooled to 150 DEG C or less stoppings and is passed through nitrogen;
S5, most afterwards through injection molding machine injection molding, be placed in baking oven dry, be immersed in after demoulding in saturation quaternary ammonium salt solution, then
It takes out, is sufficiently rinsed and dried with deionized water.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201811181655.8A CN109337347A (en) | 2018-10-11 | 2018-10-11 | A kind of environmental protection Medical rubber plug composite material and preparation method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201811181655.8A CN109337347A (en) | 2018-10-11 | 2018-10-11 | A kind of environmental protection Medical rubber plug composite material and preparation method |
Publications (1)
Publication Number | Publication Date |
---|---|
CN109337347A true CN109337347A (en) | 2019-02-15 |
Family
ID=65308740
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201811181655.8A Withdrawn CN109337347A (en) | 2018-10-11 | 2018-10-11 | A kind of environmental protection Medical rubber plug composite material and preparation method |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN109337347A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114805957A (en) * | 2022-01-19 | 2022-07-29 | 江阴市鸿萌橡塑制品有限公司 | Rubber plug and method for testing puncture force and clamping force of rubber plug |
CN117164922A (en) * | 2023-09-20 | 2023-12-05 | 安徽中马橡塑科技有限公司 | Polytetrafluoroethylene-butyl rubber composite rubber plug for injector and preparation method thereof |
-
2018
- 2018-10-11 CN CN201811181655.8A patent/CN109337347A/en not_active Withdrawn
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114805957A (en) * | 2022-01-19 | 2022-07-29 | 江阴市鸿萌橡塑制品有限公司 | Rubber plug and method for testing puncture force and clamping force of rubber plug |
CN117164922A (en) * | 2023-09-20 | 2023-12-05 | 安徽中马橡塑科技有限公司 | Polytetrafluoroethylene-butyl rubber composite rubber plug for injector and preparation method thereof |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN109337347A (en) | A kind of environmental protection Medical rubber plug composite material and preparation method | |
CN101724180B (en) | Potential cytotoxicity-free rubber piston for disposable sterile syringe and manufacturing method thereof | |
CN101104700A (en) | Radiation vulcanizing method for environment-friendly type medical rubber products | |
CN104403239B (en) | Elastic wear-resistant seal ring for engine and preparation method of elastic wear-resistant seal ring | |
US20160369014A1 (en) | Process for the production of water and solvent-free nitrile rubbers | |
CN109181125A (en) | A kind of preparation method of curing bag | |
US7335807B2 (en) | Solventless liquid isoprene compounds | |
CN102977477A (en) | High temperature vulcanization halogenated butyl rubber composition and applications thereof | |
CN105482193A (en) | Rubber material for soles and preparation method thereof | |
CN104194084A (en) | Frosting-free medicinal infusion rubber gasket | |
CN109385015A (en) | A kind of preparation method improving tire curing bladder production security | |
CN108610525A (en) | A kind of rubber seal composite material and preparation method | |
JPH06212022A (en) | Preparation of composite material comprising thermoplastic elastomer containing polyamide block and combined vulcanizable elastomer, composite material obtained by the method, and sporting goods prepared from the material | |
CN102585310B (en) | Medical sealing gasket and preparation method thereof | |
CN103382270A (en) | Anti-corrosion rubber composition and anti-corrosion rubber lining | |
CN107163420A (en) | A kind of Medical medicine bottle port rubber plug material and preparation method thereof | |
US2414145A (en) | Plasticizing of vulcanized rubber | |
CN109320741A (en) | A kind of vulcanization process of environment-friendly type medical rubber products | |
CN108912429A (en) | A kind of ozone proof and corrosion resistant type rubber material and its preparation process | |
CN104893116A (en) | Production method for die-sticking-free vulcanized sealing ring for automobile copper piece | |
WO2021256295A1 (en) | Silane coupling agent composition and rubber composition containing same | |
CN104829886B (en) | A kind of nitrile rubber and preparation method thereof | |
CN107759847A (en) | A kind of halogenated rubber for tire and preparation method thereof | |
CN106543566A (en) | It is a kind of to take turns acid and alkali-resistance elastomeric material peculiar to vessel and preparation method thereof | |
CN102134325B (en) | Method for vulcanizing nitrile elastomer |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
WW01 | Invention patent application withdrawn after publication | ||
WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190215 |