CN107987334A - A kind of composite modified nitrile rubber and preparation method thereof - Google Patents
A kind of composite modified nitrile rubber and preparation method thereof Download PDFInfo
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- CN107987334A CN107987334A CN201711271421.8A CN201711271421A CN107987334A CN 107987334 A CN107987334 A CN 107987334A CN 201711271421 A CN201711271421 A CN 201711271421A CN 107987334 A CN107987334 A CN 107987334A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L9/00—Compositions of homopolymers or copolymers of conjugated diene hydrocarbons
- C08L9/02—Copolymers with acrylonitrile
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- 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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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- 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
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
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- 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
- C08K2201/011—Nanostructured additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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Abstract
The invention discloses a kind of composite modified nitrile rubber and preparation method thereof, including following parts by weight raw material to be prepared：40 50 parts of nitrile rubber, 5 15 parts of nano-aluminum hydroxide, 5 10 parts of modifying agent, 20 35 parts of polymethyl methacrylate, 0.3 0.8 parts of coupling agent, 25 parts of crosslinking agent, 5 10 parts of butyl titanate, 38 parts of zinc stearate；The present invention is for composite by the nano-aluminum hydroxide Jing Guo specific aim modification and nitrile rubber, and nano-aluminum hydroxide is set to be dispersed in nitrile rubber system, obtained modified nitrile rubber resistance to elevated temperatures is excellent, is conducive to application of the nitrile rubber in more areas.
Description
Technical field
The present invention relates to modified material field, and in particular to a kind of composite modified nitrile rubber and preparation method thereof.
Background technology
Nitrile rubber is that oil resistivity is fabulous, resistance to as made from butadiene and acrylonitrile using emulsion polymerization at low temperature production
Mill property is higher, and heat resistance is preferable, bonding force is strong, good water resistance, air-tightness and excellent.The drawback is that lower temperature resistance is poor, resistance to
Ozon difference, insulation performance is inferior, and elasticity is slightly lower.Nitrile rubber is widely used in the various oil resistant rubber products of system, a variety of resistance to lubricating pads
Circle, gasket, casing, flexible package, flexible rubber hose, printer's roll, cable glue material etc., in industries such as automobile, aviation, oil, duplicating
In become essential elastic material.
With the continuous improvement that people require material resistance to elevated temperatures, the nitrile rubber without heat resist modification has been difficult to
Meet demand, thus, heat resist modification is carried out to nitrile rubber and is necessitated.The heat resist modification of nitrile rubber is handled now
Method species is various, and modified effect is also fine, especially with the appearance and application of nano material, the heat-resisting quantity of nitrile rubber
Increase significant effect, nitrile rubber is largely used in more areas, but there is also deficiency.Although nano material has resistance to height
The advantages of warm enhancing effect is good, and additive amount is small, but there is also difficulties in dispersion, it is of high cost the defects of.Carrying out heat resist modification mistake
Cheng Zhong, nano material, which disperses inequality, can influence its high-temperature resistant result, and obtained modified material heat-resisting quantity is relatively low, to modified material
Production and application adversely affect.
The content of the invention
The defects of it is an object of the invention to overcome existing modified nitrile rubber heat-resisting quantity poor, there is provided Yi Zhongfu
Close modified nitrile rubber and preparation method thereof；The present invention is by the nano-aluminum hydroxide and butyronitrile Jing Guo specific aim modification
Rubber is for composite, and nano-aluminum hydroxide is dispersed in nitrile rubber system, obtained modified nitrile rubber
Resistance to elevated temperatures is excellent, is conducive to application of the nitrile rubber in more areas.
In order to realize foregoing invention purpose, the present invention provides a kind of composite modified nitrile rubber, including it is following heavy
Amount part raw material are prepared：40-50 parts of nitrile rubber, 5-15 parts of nano-aluminum hydroxide, 5-10 parts of modifying agent, 20-
35 parts of polymethyl methacrylate, 0.3-0.8 parts of coupling agent, 2-5 parts of crosslinking agent, 5-10 parts of butyl titanate, 3-8
The zinc stearate of part.
A kind of above-mentioned composite modified nitrile rubber, can increase the resistance to height of resin material according to nano-aluminum hydroxide and crosslinking
The basic principle of warm nature, not only by targetedly screening modifying agent, coupling agent and the species of crosslinking agent, to improve a nanometer hydrogen-oxygen
Change the compatibility between aluminium and nitrile rubber, and make nano-aluminum hydroxide disperse evenly, to make a nanometer hydrogen-oxygen in nitrile rubber
It is more preferable to the heat-resisting quantity humidification of nitrile rubber to change aluminium, modified change also is made by controlling the degree of polymerization of nitrile rubber
Property nitrile rubber reaches optimum balance relation between heat-resisting quantity and processability, so that the modified butadiene acrylonitrile rubber made
Material is under conditions of with excellent heat-resisting quantity, it may have excellent processability, allows it to be obtained in more areas
Using.
A kind of above-mentioned composite modified nitrile rubber, wherein, the nano-aluminum hydroxide particle diameter is 10-80nm；Receive
Rice aluminium hydroxide particle diameter is smaller, and dispersiveness is poorer, and nano-aluminum hydroxide particle diameter is bigger, to the high temperature resistant humidification of nitrile rubber
It is poorer；Preferably, the nano-aluminum hydroxide particle diameter is 30-50nm；Most preferably, the nano-aluminum hydroxide particle diameter is
40nm。
A kind of above-mentioned composite modified nitrile rubber, wherein, the modifying agent is phenyl phosphorus diamides and methyl-prop
The mixture of olefin(e) acid zinc composition；The modifying agent can improve nano-aluminum hydroxide and nitrile rubber compatibility and
Nano-aluminum hydroxide surface forms polar group, beneficial to scattered；Preferably, phenyl phosphorus diamides and methyl in the modifying agent
The ratio between amount of material of zinc acrylate resin is 1 ︰ 1.
A kind of above-mentioned composite modified nitrile rubber, wherein, the degree of polymerization of polymethyl methacrylate is bigger, then is crosslinked
The heat-resisting quantity of post-modification nitrile rubber is poorer, and processability is better, and the polymer of polymethyl methacrylate is smaller, then hands over
The heat-resisting quantity of connection post-modification nitrile rubber is better, and processability is poorer, therefore, selects rational polymethyl methacrylate
The degree of polymerization, is the important means for balancing heat-resisting quantity and processability.The degree of polymerization of the polymethyl methacrylate is 200-
400；Preferably, the degree of polymerization of the polymethyl methacrylate is 250-350；Optimal, described polymethylacrylic acid
The degree of polymerization of methyl esters is 300；By preferred, obtained modified nitrile rubber both has excellent heat-resisting quantity, it may have
Preferable processability, is adapted to the application in more areas.
Wherein, the nitrile rubber degree of polymerization is 1200-1800；Preferably, the degree of polymerization of the nitrile rubber is
1400-1600；Most preferably, the degree of polymerization of the nitrile rubber is 1500；Pass through modified butadiene acrylonitrile rubber material that is preferred, obtaining
Material both has excellent heat-resisting quantity, it may have preferable processability.
A kind of above-mentioned composite modified nitrile rubber, wherein, the coupling agent is three isopropyl ester coupling agent of aluminic acid；Aluminium
Sour three isopropyl esters can increase the compatibility between nano-aluminum hydroxide and nitrile rubber and modifying agent, improve modified butadiene acrylonitrile rubber
The performance of material.
Wherein, the crosslinking agent is tetraisocyanate, which can be by the polymer former material of two kinds of different polymerization degrees
The appropriate crosslinking of material, improves the heat-resisting quantity of modified nitrile rubber.
A kind of above-mentioned composite modified nitrile rubber, wherein, its raw material further includes dispersant, plasticizer, antistatic
One or more auxiliary agents in agent, coloring agent, brightener；Above-mentioned auxiliary agent can improve the processability of modified nitrile rubber,
Increase the effect such as its feature, so as to increase its applicability.
In order to realize foregoing invention purpose, further, present invention also offers a kind of composite modified nitrile rubber
Preparation method, comprise the following steps：
（1）Nano-aluminum hydroxide is handled with coupling agent；
（2）Nano-aluminum hydroxide Jing Guo coupling agent treatment is subjected to cladding processing with modifying agent；
（3）By the nano-aluminum hydroxide after cladding and nitrile rubber processing for composite in the electric field after mixing, mixed
Close material；
（4）Mixture is being carried out after mixing with polymethyl methacrylate, crosslinking agent, zinc stearate, butyl titanate
Combined processing, obtains composite modified nitrile rubber.
A kind of preparation method of composite modified nitrile rubber, first carries out at coupling nano-aluminum hydroxide with coupling agent
Reason, increase nano-aluminum hydroxide and modifying agent, the compatibility of nitrile rubber；Nano-aluminum hydroxide is modified with modifying agent again
Processing, and form polar group on its surface；Finally made using external electric field in nano-aluminum hydroxide surface and nitrile rubber chain
Polar group polarizes, powered, by repelling each other between electric charge or attracting principle, while making nano-aluminum hydroxide dispersed,
Also can be bonded with the polar group on nitrile rubber chain, so that the high temperature resistant enhancing effect of nano-aluminum hydroxide obtains maximum journey
The embodiment of degree, so as to get modified butadiene acrylonitrile rubber heat-resisting quantity significantly improve；The preparation method is simple and reliable, is suitable for compound
Extensive, the industrialized production of modified nitrile rubber.
A kind of preparation method of above-mentioned composite modified nitrile rubber, wherein, it is preferred that step 1 carries out coupling processing
During can use ultrasonic wave aid in；Shaken by the high speed of ultrasonic wave, make nano-aluminum hydroxide dispersiveness more preferable, and to coupling
Processing has facilitation.
A kind of preparation method of above-mentioned composite modified nitrile rubber, wherein, the electric field energy described in step 3 is to group
Polarization is produced, makes group powered, so as to promote the scattered and bonded effect of nano-aluminum hydroxide, improves modified butyronitrile rubber
The heat-resisting quantity of glue.
Preferably, the electric field strength is 1.5-2.5kv/m；Electric field strength is too small, and polarization effect is weak, to nanometer hydrogen-oxygen
The dispersion effect for changing aluminium is poor；Electric field strength is excessive, and polarization effect is too strong, and intermolecular force is too big, and strand produces orientation and moves
It is dynamic, arrangement and the bonded performance for having an impact, may be decreased modified nitrile rubber to strand；Most preferably, it is described
Electric field strength be 1.8-2.0kv/m.
Wherein, it is preferred that the electric field is the constant parallel electric field of direction of an electric field；The constant parallel electric field of direction of an electric field
Best to the polarization effect of polar group, group intermolecular forces are stablized, and the scattered and bonded promotion to nano-aluminum hydroxide is made
Use best results.
Compared with prior art, beneficial effects of the present invention：
1st, modified nitrile rubber of the present invention targetedly screens the species of modifying agent, coupling agent and crosslinking agent, makes a nanometer hydrogen
Compatibility between aluminium oxide and nitrile rubber is more preferable, and the dispersiveness in nitrile rubber is more preferable, and nano-aluminum hydroxide is to butyronitrile
The heat-resisting quantity humidification of rubber is more preferable.
2nd, modified nitrile rubber of the present invention by control the degree of polymerization of nitrile rubber and polymethyl methacrylate come
Modified modified nitrile rubber is reached optimum balance relation between heat-resisting quantity and processability, so as to get modification
Nitrile rubber is under conditions of with excellent heat-resisting quantity, it may have excellent processability.
3rd, the preparation method of modified nitrile rubber of the present invention, using the polarization of external electric field, can promote nanometer hydrogen
Aluminium oxide is scattered and bonded in nitrile rubber system, and the high temperature resistant enhancing effect of nano-aluminum hydroxide is more preferable, and what is obtained changes
The heat-resisting quantity higher of property nitrile rubber.
4th, the preparation method of modified nitrile rubber of the present invention is simple, reliable, is adapted to composite modified nitrile rubber
Extensive, industrialized production.
Embodiment
With reference to test example and embodiment, the present invention is described in further detail.But this should not be understood
Following embodiment is only limitted to for the scope of the above-mentioned theme of the present invention, it is all that this is belonged to based on the technology that present invention is realized
The scope of invention.
Embodiment 1
（1）10 parts of nano-aluminum hydroxide is handled with 0.6 part of three isopropyl ester of aluminic acid；
（2）By the nano-aluminum hydroxide Jing Guo coupling agent treatment 3.5 parts of phenyl phosphorus diamides and 3.5 parts of methacrylic acid
Zinc carries out cladding processing；
（3）By nitrile rubber that the nano-aluminum hydroxide after cladding and 45 parts of the degree of polymerization are 1500 after mixing in electric-field strength
Spend to be extruded in the constant parallel electric field of the direction of an electric field of 2.0kv/m, obtain mixture；
（4）Polymethyl methacrylate, 4 part of four isocyanic acid of the mixture that step 3 is obtained and 28 parts of the degree of polymerization for 300
Ester, 8 parts of butyl titanate, 5 parts of zinc stearate are extruded after mixing, obtain composite modified nitrile rubber.
Embodiment 2
（1）5 parts of nano-aluminum hydroxide is handled with 0.3 part of three isopropyl ester of aluminic acid；
（2）By the nano-aluminum hydroxide Jing Guo coupling agent treatment 2.5 parts of phenyl phosphorus diamides and 2.5 parts of methacrylic acid
Zinc carries out cladding processing；
（3）By nitrile rubber that the nano-aluminum hydroxide after cladding and 50 parts of the degree of polymerization are 1200 after mixing in electric field
Intensity is to be extruded in the electric field of 2.5kv/m, obtains mixture；
（4）Polymethyl methacrylate, 2 part of four isocyanic acid of the mixture that step 3 is obtained and 20 parts of the degree of polymerization for 200
Ester, 5 parts of butyl titanate, 3 parts of zinc stearate are extruded after mixing, obtain composite modified nitrile rubber.
Embodiment 3
（1）15 parts of nano-aluminum hydroxide is handled with 0.8 part of three isopropyl ester of aluminic acid；
（2）By the nano-aluminum hydroxide Jing Guo coupling agent treatment with 5 parts of phenyl phosphorus diamides and 4 parts of zinc methacrylate into
The processing of row cladding；
（3）By nitrile rubber that the nano-aluminum hydroxide after cladding and 40 parts of the degree of polymerization are 1600 after mixing in electric field
Intensity is to be extruded in the constant parallel electric field of the direction of an electric field of 1.5kv/m, obtains mixture；
（4）Polymethyl methacrylate, 5 part of four isocyanic acid of the mixture that step 3 is obtained and 35 parts of the degree of polymerization for 400
Ester, 10 parts of butyl titanate, 8 parts of zinc stearate are extruded after mixing, obtain composite modified nitrile rubber.
Comparative example 1
（1）10 parts of nano-aluminum hydroxide is handled with 0.6 part of three isopropyl ester of aluminic acid；
（2）By the nano-aluminum hydroxide Jing Guo coupling agent treatment and 7 parts of dispersant, the butyronitrile rubber that 45 parts of the degree of polymerization is 1500
Glue is extruded in the constant parallel electric field of the direction of an electric field that electric field strength is 1.2kv/m after mixing, obtains mixture；
（3）Polymethyl methacrylate, 4 part of four isocyanic acid of the mixture that step 2 is obtained and 28 parts of the degree of polymerization for 300
Ester, 8 parts of butyl titanate, 5 parts of zinc stearate are extruded after mixing, obtain modified nitrile rubber.
Comparative example 2
（1）10 parts of nano-aluminum hydroxide is handled with 0.6 part of three isopropyl ester of aluminic acid；
（2）By the nano-aluminum hydroxide Jing Guo coupling agent treatment 3.5 parts of phenyl phosphorus diamides and 3.5 parts of methacrylic acid
Zinc carries out cladding processing；
（3）It is 300 by nitrile rubber that the nano-aluminum hydroxide after cladding and 45 parts of the degree of polymerization are 1500,28 parts of the degree of polymerization
Polymethyl methacrylate, 4 parts of tetraisocyanates, 8 parts of butyl titanate, 5 parts of zinc stearate carry out after mixing
Extrusion, obtains modified nitrile rubber.
Comparative example 3
（1）10 parts of nano-aluminum hydroxide is handled with 0.6 part of three isopropyl ester of aluminic acid；
（2）By the nano-aluminum hydroxide Jing Guo coupling agent treatment with 3.5 parts of polystyrene and 3.5 parts of zinc methacrylate into
The processing of row cladding；
（3）By nitrile rubber that the nano-aluminum hydroxide after cladding and 45 parts of the degree of polymerization are 1500 after mixing in electric-field strength
Spend to be extruded in the constant parallel electric field of the direction of an electric field of 2.0kv/m, obtain mixture；
（4）Polymethyl methacrylate, 4 part of four isocyanic acid of the mixture that step 3 is obtained and 28 parts of the degree of polymerization for 300
Ester, 8 parts of butyl titanate, 5 parts of zinc stearate are extruded after mixing, obtain modified nitrile rubber.
Comparative example 4
（1）10 parts of nano-aluminum hydroxide is handled with 0.6 part of three isopropyl ester of aluminic acid；
（2）By the nano-aluminum hydroxide Jing Guo coupling agent treatment 3.5 parts of phenyl phosphorus diamides and 3.5 parts of methacrylic acid
Zinc carries out cladding processing；
（3）By the polymethyl methacrylate of the nano-aluminum hydroxide after cladding and 28 parts of the degree of polymerization for 300,4 part of four isocyanide
Acid esters, 8 parts of butyl titanate, 5 parts of zinc stearate, 45 parts of the degree of polymerization be 1500 nitrile rubber after mixing in electricity
Field intensity is to be extruded in the constant parallel electric field of the direction of an electric field of 2.0kv/m, obtains modified nitrile rubber.
Comparative example 5
（1）10 parts of nano-aluminum hydroxide is handled with 0.6 part of three isopropyl ester of aluminic acid；
（2）By the nano-aluminum hydroxide Jing Guo coupling agent treatment 3.5 parts of phenyl phosphorus diamides and 3.5 parts of methacrylic acid
Zinc carries out cladding processing；
（3）By nitrile rubber that the nano-aluminum hydroxide after cladding and 45 parts of the degree of polymerization are 1000 after mixing in electric-field strength
Spend to be extruded in the constant parallel electric field of the direction of an electric field of 2.0kv/m, obtain mixture；
（4）Polymethyl methacrylate that the mixture that step 3 is obtained and 28 parts of the degree of polymerization are 180,4 parts of four fourth of metatitanic acid
Ester, 5 parts of zinc stearate, 8 parts of tetraisocyanates are extruded after mixing, obtain modified nitrile rubber.
By the modified nitrile rubber in above-described embodiment 1-3 and comparative example 1-5, performance detection is carried out, records data
It is as follows：
| Performance | Long-time service temperature（℃） | Processability |
| Embodiment 1 | 132 | ++++ |
| Embodiment 2 | 131 | ++++ |
| Embodiment 3 | 132 | ++++ |
| Comparative example 1 | 124 | ++++ |
| Comparative example 2 | 125 | ++++ |
| Comparative example 3 | 126 | ++++ |
| Comparative example 4 | 128 | ++++ |
| Comparative example 5 | 131 | ++ |
| Nitrile rubber | 120 | +++ |
Note："+" is more, illustrates that performance is better.
Above-mentioned analysis of experimental data is understood, the composite modified nitrile rubber material of the invention being prepared in embodiment 1-3
Material, nano-aluminum hydroxide are uniformly dispersed, and good with the compatibility of nitrile rubber, modified nitrile rubber heat-resisting quantity is good, processing
Property is good；And in comparative example 1, modifying agent is not used processing is modified to nano-aluminum hydroxide, although adding dispersant, receive
Rice aluminium hydroxide dispersion effect is poor, and the poor compatibility with nitrile rubber, the heat-resisting quantity of modified nitrile rubber significantly reduces；
Not processing for composite in the electric field in comparative example 2, nano-aluminum hydroxide dispersion effect is poor, the resistance to height of modified nitrile rubber
Warm nature significantly reduces；Modifying agent is not the application defined in comparative example 3, and nano-aluminum hydroxide dispersion effect is poor, modified fourth
The heat-resisting quantity of nitrile rubber material significantly reduces；Cross-linking reaction equally carries out in the electric field in comparative example 4, and electric field is to cross-linking reaction
Have a negative impact, so as to get modified nitrile rubber heat-resisting quantity reduce；The nitrile rubber that is used in comparative example 5 and
The polymethyl methacrylate degree of polymerization is too small, although heat-resisting quantity increased after compound, its processability significantly reduces, unfavorable
In the application of modified nitrile rubber.
Claims (10)
1. a kind of composite modified nitrile rubber, it is characterised in that be prepared including following parts by weight raw material：40-50
Part nitrile rubber, 5-15 parts of nano-aluminum hydroxide, 5-10 parts of modifying agent, 20-35 parts of polymethyl methacrylate,
0.3-0.8 parts of coupling agent, 2-5 parts of crosslinking agent, 5-10 parts of butyl titanate, 3-8 parts of zinc stearate；The modifying agent
For phenyl phosphorus diamides and the mixture of zinc methacrylate composition；The coupling agent is three isopropyl ester coupling agent of aluminic acid, described
Crosslinking agent is tetraisocyanate；The degree of polymerization of the polymethyl methacrylate is 200-400；The nitrile rubber degree of polymerization is
1200-1800。
2. modified nitrile rubber according to claim 1, it is characterised in that phenyl phosphorus diamides in the modifying agent
It is 1 ︰ 1 with the ratio between the amount of material of zinc methacrylate.
3. modified nitrile rubber according to claim 1, it is characterised in that the polymethyl methacrylate gathers
Right is 250-350.
4. modified nitrile rubber according to claim 3, it is characterised in that the polymethyl methacrylate gathers
Right is 300.
5. modified nitrile rubber according to claim 1, it is characterised in that the nitrile rubber degree of polymerization is
1400-1600。
6. modified nitrile rubber according to claim 5, it is characterised in that the nitrile rubber degree of polymerization is
1500。
A kind of 7. preparation method of the modified nitrile rubber as described in claim any one of 1-6, it is characterised in that including with
Lower step：
（1）Nano-aluminum hydroxide is handled with coupling agent；
（2）Nano-aluminum hydroxide Jing Guo coupling agent treatment is subjected to cladding processing with modifying agent；
（3）By the nano-aluminum hydroxide after cladding and nitrile rubber processing for composite in the electric field after mixing, mixed
Close material；（4）Mixture is being carried out after mixing with polymethyl methacrylate, crosslinking agent, zinc stearate, butyl titanate
Combined processing, obtains composite modified nitrile rubber.
8. preparation method according to claim 7, it is characterised in that step（3）Middle electric field strength is 1.5-2.5kv/m.
9. preparation method according to claim 8, it is characterised in that step（3）Middle electric field strength is 1.8-2.0kv/m.
10. preparation method according to claim 7, it is characterised in that step（3）Middle electric field is put down for direction of an electric field is constant
Row electric field.
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| CN201711271421.8A CN107987334A (en) | 2017-12-05 | 2017-12-05 | A kind of composite modified nitrile rubber and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109810416A (en) * | 2018-12-27 | 2019-05-28 | 江苏金轮橡胶有限公司 | Modified butyl rubber |
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2017
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109810416A (en) * | 2018-12-27 | 2019-05-28 | 江苏金轮橡胶有限公司 | Modified butyl rubber |
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