CN109535730A - A kind of antistatic silicone rubber of electric wire and preparation method thereof - Google Patents
A kind of antistatic silicone rubber of electric wire and preparation method thereof Download PDFInfo
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- CN109535730A CN109535730A CN201811425993.1A CN201811425993A CN109535730A CN 109535730 A CN109535730 A CN 109535730A CN 201811425993 A CN201811425993 A CN 201811425993A CN 109535730 A CN109535730 A CN 109535730A
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
- C08L83/04—Polysiloxanes
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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- C08K2201/002—Physical properties
- C08K2201/006—Additives being defined by their surface area
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- 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
- C08K2201/017—Additives being an antistatic agent
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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- C08L2201/04—Antistatic
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- C08L2203/00—Applications
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- C08L2203/202—Applications use in electrical or conductive gadgets use in electrical wires or wirecoating
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- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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Abstract
The present invention relates to silicon rubber technical fields, more particularly to a kind of antistatic silicone rubber and preparation method thereof of electric wire, which includes the raw material of following parts by weight: 90-110 parts of composite silicone rubber, 45-55 parts of reinforcing agent, 2.5-3.5 parts of hydroxyl-terminated injecting two methyl siloxane, 1.5-2.5 parts of dimethicone, 35-45 parts of antistatic ingredient, 0.3-0.7 parts of titanate coupling agent, 0.15-0.25 parts of release agent and 5.5-6.5 parts of vulcanizing agent.Antistatic silicone rubber of the invention reduces the volume resistivity of material by using antistatic agent, make silicon rubber that there is preferably electromagnetic shielding effect and electric conductivity, electrostatic charge in electric wire is conducted outward, have the function that antistatic, simultaneously by using materials such as reinforcing agent, hydroxyl-terminated injecting two methyl siloxane and dimethicones, make silicon rubber obtained that there is the performances such as preferable tensile strength, elongation at break, tearing strength, high mechanical strength, stability is high, has a wide range of application.
Description
Technical field
The present invention relates to silicon rubber technical fields, and in particular to a kind of antistatic silicone rubber of electric wire and its preparation side
Method.
Background technique
Silicon rubber has a wide range of application since it is with preferable resistance to ag(e)ing and stability, and more application is in silicone tube, electricity
In the products such as power covering material, but undesirable applied to the silastic material antistatic property in wire and cable at present, be easy by
Harm is generated in the electrostatic of wire and cable, jeopardizes using safe, is easy to produce electric leakage, human electric shock etc., jeopardizes life safety, peace
Full property is lower, is not able to satisfy requirement of the existing market to Silicone Rubber, using being subject to certain restrictions.
Summary of the invention
In order to overcome shortcoming and defect existing in the prior art, the purpose of the present invention is to provide a kind of the anti-of electric wire
Electrostatic silicon rubber, the antistatic silicone rubber by using antistatic agent reduce material volume resistivity, make silicon rubber have compared with
Good electromagnetic shielding effect and electric conductivity conduct the electrostatic charge in electric wire outward, have the function that it is antistatic, simultaneously lead to
It crosses using materials such as reinforcing agent, hydroxyl-terminated injecting two methyl siloxane and dimethicones, there is silicon rubber obtained preferable
The performances such as tensile strength, elongation at break, tearing strength, high mechanical strength, stability is high, has a wide range of application.
Another object of the present invention is to provide a kind of preparation method of the antistatic silicone rubber of electric wire, the preparation methods
Simple process, convenient operation and control, quality are stablized, and high production efficiency, production cost is low, can make antistatic silicone rubber tool obtained
There is preferable volume resistivity, antistatic effect is good, while there is preferable tensile strength, elongation at break and tearing strength etc.
Mechanical performance, stability is high, can large-scale industrial production.
The purpose of the invention is achieved by the following technical solution: a kind of antistatic silicone rubber of electric wire, including weighs as follows
Measure the raw material of part:
The present invention prepares silicon rubber by using the raw material of mentioned kind, and the volume of material is reduced by using antistatic agent
Resistivity makes silicon rubber have preferably electromagnetic shielding effect and electric conductivity, have the function that it is antistatic, while by using
The materials such as reinforcing agent, hydroxyl-terminated injecting two methyl siloxane and dimethicone have silicon rubber obtained and preferably stretch by force
The performances such as degree, elongation at break, tearing strength, high mechanical strength, stability is high, has a wide range of application.
Wherein, the mechanical strength of silicon rubber can be improved by using reinforcing agent；The hydroxyl-terminated injecting two methyl siloxane of use
It is avoided that the structuring phenomenons such as silicon rubber is hardened in storage placement process, plasticity is lower, processing performance reduces, improves
The stability of silicon rubber (needs to re-start mixing if the silicon rubber for structuring occurred or heat treatment goes to improve structuring
Phenomenon, but process costs are increased simultaneously, and reduce production efficiency and quality), meanwhile, hydroxyl-terminated injecting two methyl siloxane energy
It is reacted with the Si-OH base on reinforcing agent (precipitated silica) surface, is allowed to hydrophobization, more raising reinforcing agent is in silicon rubber system
Dispersibility, and inhibit the structuring of silicon rubber；And pass through the dosage of strict control hydroxyl-terminated injecting two methyl siloxane, it can make to be made
Silicon rubber have preferable resilience and tensile strength reduced if the dosage of hydroxyl-terminated injecting two methyl siloxane is excessive
The rebound degree of silicon rubber, hardness is larger, and plasticity and processing forming are lower；And if the dosage of hydroxyl-terminated injecting two methyl siloxane
It is very few, then the adhesive bond between raw material is reduced, structuring phenomenon is easy to appear.
The dimethicone of use can improve the plasticity of silicon rubber, reduce hardness, increase flexibility, increase silicon rubber with
The compatibility of the powder materials such as reinforcing agent reduces the viscosity of base rubber, improves the processing forming of silicon rubber；The antistatic agent of use
The volume resistivity that material can be reduced makes silicon rubber have preferably electromagnetic shielding effect and electric conductivity, reaches antistatic
Effect；The titanate coupling agent of use can promote, be catalyzed the cross-linking polymerization of storeroom, improve wetability between material and
The interaction such as dispersibility, improves the performances such as tensile strength, elongation at break, the tearing strength of silicon rubber；The release agent of use
The demolding performace that silicon rubber can be effectively improved improves its processing forming and stability；The vulcanizing agent of use can effectively improve
The vulcanization crosslinking of silicon rubber acts on, and improves the mechanical strength and stability of silicon rubber after molding.
Preferably, the composite silicone rubber is by methyl vinyl silicone rubber A, methyl vinyl silicone rubber B and methyl second
Alkenyl silicon rubber C is with the mixture that weight ratio is that 20:60-70:10-20 is formed；Wherein, the methyl vinyl silicone rubber A
Contents of ethylene is 0.02-0.06%, and methyl content 99.94-99.98%, molecular weight is 600,000-70 ten thousand；The methyl second
The contents of ethylene of alkenyl silicon rubber B is 0.20-0.25%, and methyl content 99.75-99.80%, molecular weight is 600,000-70
Ten thousand；The methyl vinyl silicone rubber C contents of ethylene is 2.5-3.5%, methyl content 96.5-97.5%, and molecular weight is
600000-70 ten thousand.
The present invention compounds composition by using three kinds of different contents of ethylene, without the methyl vinyl silicone rubber of molecular weight
Composite silicone rubber ingredient, and the contents of ethylene and molecular weight of strict control three, the characteristic grown using high molecular weight, main chain,
Intermolecular active force is larger, silicon rubber obtained can be made to have preferable mechanical strength and processing forming, wherein use
Methyl vinyl silicone rubber C has the vinyl of high level, can significantly improve the degree of cross linking of silicon rubber system, improves silicon rubber
The tearing strength of finished product；And according to methyl vinyl silicone rubber A and methyl vinyl silicone rubber B contents of ethylene mistake
It is few, then the property such as tensile strength, elongation at break, tearing strength for reducing the crosslinked action of silicon rubber, and reducing silicon rubber
Energy；The silicon rubber heat-resisting if contents of ethylene of methyl vinyl silicone rubber is excessive, after reducing vulcanization；If ethylene methacrylic
The molecular weight of base silicon rubber A and methyl vinyl silicone rubber B are lower, then reduce the mechanical strength of silicon rubber finished product and be processed into
Type.
It is further preferred that above-mentioned methyl vinyl silicone rubber A, methyl vinyl silicone rubber B, methyl vinyl silicone rubber
The chemical formula of C is as follows:
Wherein, the n=8750-8800, m=32-38 of the methyl vinyl silicone rubber A；The methyl ethylene silicon rubber
The n=8550-8650 of glue B, m=15-20；The n=8750-8800, m=250-300 of the methyl vinyl silicone rubber C.
Preferably, the reinforcing agent is specific surface area in 160-180m2The precipitated silica of/g.
The present invention can improve significantly the mechanical strengths such as the resilience of silicon rubber, make its tool by using precipitated silica
There is preferable rebound degree, the flexibility of silicon rubber is preferable, and tensile strength, elongation at break, tearing strength are preferable, and strictly control
The specific surface area of precipitated silica processed, partial size is small, precipitated silica can be made to be well dispersed in silicon rubber, effectively improve silicon rubber
Mechanical strength.
Preferably, every part of antistatic ingredient includes the raw material of following parts by weight:
The present invention by using above-mentioned raw materials as antistatic agent, and the compounding dosage between each material of strict control, energy
The volume resistivity of material is effectively reduced, makes silicon rubber that there is preferably electromagnetic shielding effect and electric conductivity, reaches antistatic
Effect；Wherein, the acetylene carbon black partial size of use is small, large specific surface area, good dispersion, can be evenly dispersed in silicon rubber material
It works, and surface-active is big, resistivity is low, has preferable electric conductivity and antistatic property, by its electric conductivity by electric wire
In electrostatic charge conduct outward, reach the antistatic property of electric wire；The superconductive carbon black of use is as antistatic silicone rubber
Conductive black, partial size is small, is used in combination with acetylene carbon black, and interparticle spacing becomes smaller, and the interparticle probability increase that contacts with each other increases
The electric conductivity of silicon rubber conducts the electrostatic charge generated in electric wire outward, reaches the antistatic property of electric wire silicon rubber；It adopts
The silver-plated copper powder used is as the conductive filler in antistatic silicone rubber, in the coated with silver on surface of copper ion, surface coated silver layer
Volume resistivity is low, effectively reduces the volume resistivity of the entire particle of silver-plated copper powder, increases the electric conductivity of silicon rubber, will be electric
The electrostatic charge generated in line conducts outward, reaches the antistatic property of electric wire silicon rubber；The carbon fiber of use is as antistatic
The volume resistivity of silicon rubber can be then effectively reduced in fiber filling agent ingredient in silicon rubber, less dosage, will produce in electric wire
Raw electrostatic charge conducts outward, thus have the function that it is antistatic, and can make silicon rubber have certain electromagnetic shielding effect.
Preferably, the mixture that the release agent is made of zinc stearate and stearic acid with weight ratio for 1:1；The sulphur
Agent is 2,5- dimethyl -2,5- di-t-butyl hexane peroxide.
The present invention is used as release agent by using zinc stearate, stearic acid compounding, can improve the interior demolding performace of silicon rubber,
Compatibility is good, makes silicon rubber after molding be easy to demould, processing forming is good；And it is single when being used as using zinc stearate or stearic acid
When the release agent of one component, the mechanical strengths such as the tearing strength of silicon rubber are reduced.And by using 2,5- dimethyl -2,5- two
Tert-butyl hydroperoxide hexane can improve the vulcanization crosslinking effect of silicon rubber system, significantly shortening vulcanization time, mention as vulcanizing agent
Mechanical strengths and the stability such as tensile strength, elongation at break, the tearing strength of high silicon rubber after molding.
Preferably, the titanate coupling agent is three isostearic acid isopropyl titanates, three (dioctyl pyrophosphoryl oxygroup) titaniums
At least one of isopropyl propionate and two (dioctyl phosphite base) tetraisopropyl titanates.
The present invention can improve the interaction between silicon rubber material by using the titanate coupling agent of mentioned kind,
The catalytic action and cross-linked polymeric effect for promoting storeroom, improve tensile strength, elongation at break, tearing strength of silicon rubber etc.
Performance；More preferably, the titanate coupling agent is three isostearic acid isopropyl titanates, three (dioctyl pyrophosphoryl oxygroup) titaniums
The mixing that isopropyl propionate and two (dioctyl phosphite base) tetraisopropyl titanates are formed with weight ratio for 1.8-2.4:2.5-3:1
Object.
Another object of the present invention is achieved through the following technical solutions: a kind of antistatic silicon rubber of electric wire as described above
The preparation method of glue, includes the following steps:
Step A, base rubber is prepared:
Step A1: in parts by weight, being stirred mixing for composite silicone rubber, and material A 1 is made；
Step A2: according to parts by weight, reinforcing agent is added in five times into material A 1 made from step A1, after mixing evenly
Material A 2 is made；
Step A3: according to parts by weight, successively hydroxyl-terminated injecting two methyl siloxane and release agent is added to step A2 and are made
Material A 2 in, stir mixing is agglomerating, be made material A 3；
Step A4: material A 3 made from step A3 is subjected to heating refining glue for the first time, discharging, mill is uniform, lower roll, stands
It is carried out after 8-20h, base rubber is made；
Step B, finished product glue is prepared:
Base rubber mill made from step A4 is uniform, and clot lower roll carries out mixing, then successively by dimethicone, anti-
Electrostatic component and titanate coupling agent are added into base rubber, are mixed, and mixture is made, and then carry out second of heating refining
Glue, discharging, mill is uniform, lower roll, carries out after standing 8-20h, finished product glue；
Step C, antistatic silicone rubber is prepared:
According to parts by weight, vulcanizing agent is added into finished product glue made from step B, sulfidization molding, antistatic silicon rubber is made
Glue.
The present invention prepares antistatic silicone rubber by using above-mentioned steps, simple process, convenient operation and control, and quality is steady
Fixed, high production efficiency, production cost is low, and antistatic silicone rubber obtained can be made to have preferable volume resistivity, antistatic effect
Fruit is good, while having the mechanical performances such as preferable tensile strength, elongation at break and tearing strength, and stability is high, can be extensive
Industrialized production；Wherein, by the addition sequence and processing parameter of strict control unclassified stores, first enhancing is added in equivalent in batches
Agent, improves dispersibility of the reinforcing agent in silicon rubber system, improves the mechanical strength of silicon rubber system, and it is poly- that terminal hydroxy group is then added
Dimethyl siloxane and release agent are avoided that reinforcing agent makes silicon rubber be easy to tie when improving silicone rubber mechanical performance
Structure phenomenon, inhibits the structuring phenomenon of silicon rubber, while improving the interior demolding performace of silicon rubber, it is made to be easy to de- after shaping
Mould has preferable processing forming, and the base rubber of high mechanical strength is made after first time heats up refining glue；Thereafter, by diformazan
Base silicone oil, antistatic ingredient and titanate coupling agent are added into base rubber, and (addition of each material mixes after upper primary addition
It is further continued for putting into next material after stirring to no powder state), promote the cross-linked polymeric of material, improves the antistatic work of silicon rubber
With and processing forming；The vulcanization crosslinking that vulcanizing agent promotes each material of silicon rubber is finally added, the machinery for improving silicon rubber is strong
Degree and stability.
Preferably, in the step A1, the stirring mixing time of composite silicone rubber is 8-15min；In the step C, sulphur
Chemical conversion type uses steam vulcanization (cure) mode, and curing temperature is 120-140 DEG C, time 3-7min.
The present invention passes through the mixing time of strict control composite silicone rubber, can improve methyl vinyl silicone rubber A, methyl second
The degree of mixing of alkenyl silicon rubber B and methyl vinyl silicone rubber C are mentioned using the high-content vinyl of methyl vinyl silicone rubber C
The degree of cross linking of high three effectively improves the tearing strength of silicon rubber；And pass through the temperature and time of strict control sulfidization molding, energy
Improve the mechanical strength and stability of silicon rubber.More preferably, in the step (6), the temperature of sulfidization molding is 120 DEG C,
125 DEG C, 130 DEG C, 135 DEG C or 140 DEG C, the time of sulfidization molding is 3min, 4min, 5min, 6min or 7min.
Preferably, in the step A4, the specific steps for the refining glue that heats up for the first time are as follows: material A 3 is warming up to 110-130
DEG C, 50-70min is then mediated, kneading is agglomerating, then carries out first time vacuumize process；The first time vacuumize process when
Between be 50-70min, vacuum degree be -0.06MPa~-0.10MPa.
The present invention is by carrying out heating refining glue for material A 3 and mediating agglomerating, raising composite silicone rubber, reinforcing agent, terminal hydroxy group
Dispersibility and intersolubility between dimethyl silicone polymer and release agent effectively improve the intensity of silicon rubber, tensile strength, pull apart
The mechanical performances such as elongation and tearing strength, inhibit the structuring of silicon rubber, make it easier to demould, and be vacuum-treated and tight
Lattice control vacuum time and vacuum degree, can improve the agglomerating effect of kneading of material, can improve the inside bonding polymerism of silicon rubber,
The processes such as the extrusion forming for being easy to be processed, processing forming is good, improves the mechanical strength of silicon rubber.More preferably, object
Material A3 is warming up to 110 DEG C, 115 DEG C, 120 DEG C, 125 DEG C or 130 DEG C, kneading time 50min, 55min, 60min, 65min or
70min, time of vacuum processing are 50min, 55min, 60min, 65min or 70min, vacuum degree be -0.06MPa, -
0.07MPa, -0.08MPa, -0.09MPa or -0.10MPa.
Preferably, in the step B, the specific steps of second of refining glue that heats up are as follows: mixture is warming up to 110-130
DEG C, 50-70min is then mediated, kneading is agglomerating, then carries out second of vacuumize process；Second of vacuumize process when
Between be 20-40min, vacuum degree be -0.06MPa~-0.10MPa.
The present invention improves base rubber and dimethicone, antistatic by the way that mixture is carried out heating refining glue and mediates agglomerating
Dispersibility and intersolubility between component and titanate coupling agent, effectively improve the antistatic property of silicon rubber, processing forming and
Cross-linked polymeric degree improves the mechanical performances such as intensity, tensile strength, elongation at break and the tearing strength of silicon rubber；And it carries out true
Vacancy reason and strict control vacuum time and vacuum degree, can improve the agglomerating effect of kneading of material, can improve the inside of silicon rubber
Adhesion to polymeric, the processes such as extrusion forming for being easy to be processed, processing forming is good, improves the mechanical strength of silicon rubber.More
To be preferred, mixture is warming up to 110 DEG C, 115 DEG C, 120 DEG C, 125 DEG C or 130 DEG C, kneading time 50min, 55min,
60min, 65min or 70min, time of vacuum processing are 20min, 25min, 30min, 35min or 40min, vacuum degree is-
0.06MPa, -0.07MPa, -0.08MPa, -0.09MPa or -0.10MPa.
The beneficial effects of the present invention are: the antistatic silicone rubber of electric wire of the invention is dropped by using antistatic agent
The volume resistivity of low material makes silicon rubber have preferably electromagnetic shielding effect and electric conductivity, by the electrostatic electricity in electric wire
Lotus is conducted outward, have the function that it is antistatic, while by using reinforcing agent, hydroxyl-terminated injecting two methyl siloxane and dimethyl-silicon
The materials such as oil make silicon rubber obtained have the performances such as preferable tensile strength, elongation at break, tearing strength, mechanical strength
Height, stability is high, has a wide range of application.
The preparation method simple process of the antistatic silicone rubber of electric wire of the present invention, convenient operation and control, quality are stablized, raw
Produce high-efficient, production cost is low, and antistatic silicone rubber obtained can be made to have preferable volume resistivity, and antistatic effect is good,
There are the mechanical performances such as preferable tensile strength, elongation at break and tearing strength simultaneously, stability is high, can heavy industrialization
Production.
Specific embodiment
For the ease of the understanding of those skilled in the art, below with reference to embodiment, the present invention is further illustrated, real
The content that the mode of applying refers to not is limitation of the invention.
Embodiment 1
A kind of antistatic silicone rubber of electric wire, the raw material including following parts by weight:
The composite silicone rubber is by methyl vinyl silicone rubber A, methyl vinyl silicone rubber B and methyl ethylene silicon rubber
Glue C is with the mixture that weight ratio is that 20:70:10 is formed；Wherein, the contents of ethylene of the methyl vinyl silicone rubber A is
0.02%, methyl content 99.98%, molecular weight is 600,000；The contents of ethylene of the methyl vinyl silicone rubber B is
0.20%, methyl content 99.80%, molecular weight is 600,000；The methyl vinyl silicone rubber C contents of ethylene is 2.5%,
Methyl content is 97.5%, and molecular weight is 600,000.
Above-mentioned methyl vinyl silicone rubber A, methyl vinyl silicone rubber B, methyl vinyl silicone rubber C chemical formula be such as
Shown in lower:
Wherein, the n=8800, m=32 of the methyl vinyl silicone rubber A；The n=of the methyl vinyl silicone rubber B
8650, m=15；The n=8800, m=250 of the methyl vinyl silicone rubber C.
The reinforcing agent is specific surface area in 160m2The precipitated silica of/g.
Every part of antistatic ingredient includes the raw material of following parts by weight:
The mixture that the release agent is made of zinc stearate and stearic acid with weight ratio for 1:1；The vulcanizing agent is
2,5- dimethyl -2,5- di-t-butyl hexane peroxide.
The titanate coupling agent is three isostearic acid isopropyl titanates.
A kind of preparation method of the antistatic silicone rubber of electric wire as described above, includes the following steps:
Step A, base rubber is prepared:
Step A1: in parts by weight, being stirred mixing for composite silicone rubber, and material A 1 is made；
Step A2: according to parts by weight, reinforcing agent is added in five times into material A 1 made from step A1, after mixing evenly
Material A 2 is made；
Step A3: according to parts by weight, successively hydroxyl-terminated injecting two methyl siloxane and release agent is added to step A2 and are made
Material A 2 in, stir mixing is agglomerating, be made material A 3；
Step A4: material A 3 made from step A3 is subjected to heating refining glue for the first time, discharging, mill is uniform, lower roll, stands
It is carried out after 8h, base rubber is made；
Step B, finished product glue is prepared:
Base rubber mill made from step A4 is uniform, and clot lower roll carries out mixing, then successively by dimethicone, anti-
Electrostatic component and titanate coupling agent are added into base rubber, are mixed, and mixture is made, and then carry out second of heating refining
Glue, discharging, mill is uniform, lower roll, carries out after standing 8h, finished product glue；
Step C, antistatic silicone rubber is prepared:
According to parts by weight, vulcanizing agent is added into finished product glue made from step B, sulfidization molding, antistatic silicon rubber is made
Glue.
In the step A1, the stirring mixing time of composite silicone rubber is 8min；In the step C, sulfidization molding is used
Steam vulcanization (cure) mode, the temperature of vulcanization are 120 DEG C, time 7min.
In the step A4, the specific steps for the refining glue that heats up for the first time are as follows: material A 3 is warming up to 110 DEG C, is then mediated
70min, kneading is agglomerating, then carries out first time vacuumize process；The time of the first time vacuumize process is 50min, vacuum
Degree is -0.10MPa.
In the step B, the specific steps of second of refining glue that heats up are as follows: mixture is warming up to 110 DEG C, is then mediated
70min, kneading is agglomerating, then carries out second of vacuumize process；The time of second of vacuumize process is 20min, vacuum
Degree is -0.10MPa.
Embodiment 2
A kind of antistatic silicone rubber of electric wire, the raw material including following parts by weight:
The composite silicone rubber is by methyl vinyl silicone rubber A, methyl vinyl silicone rubber B and methyl ethylene silicon rubber
Glue C is with the mixture that weight ratio is that 20:65:15 is formed；Wherein, the contents of ethylene of the methyl vinyl silicone rubber A is
0.04%, methyl content 99.96%, molecular weight is 650,000；The contents of ethylene of the methyl vinyl silicone rubber B is
0.23%, methyl content 99.77%, molecular weight is 650,000；The methyl vinyl silicone rubber C contents of ethylene is 3%, first
Base content is 97%, and molecular weight is 650,000.
Above-mentioned methyl vinyl silicone rubber A, methyl vinyl silicone rubber B, methyl vinyl silicone rubber C chemical formula be such as
Shown in lower:
Wherein, the n=8780, m=35 of the methyl vinyl silicone rubber A；The n=of the methyl vinyl silicone rubber B
8600, m=19；The n=8770, m=270 of the methyl vinyl silicone rubber C.
The reinforcing agent is specific surface area in 170m2The precipitated silica of/g.
Every part of antistatic ingredient includes the raw material of following parts by weight:
The mixture that the release agent is made of zinc stearate and stearic acid with weight ratio for 1:1；The vulcanizing agent is
2,5- dimethyl -2,5- di-t-butyl hexane peroxide.
The titanate coupling agent is isopropyl tri(dioctylpyrophosphato)titanate.
A kind of preparation method of the antistatic silicone rubber of electric wire as described above, includes the following steps:
Step A, base rubber is prepared:
Step A1: in parts by weight, being stirred mixing for composite silicone rubber, and material A 1 is made；
Step A2: according to parts by weight, reinforcing agent is added in five times into material A 1 made from step A1, after mixing evenly
Material A 2 is made；
Step A3: according to parts by weight, successively hydroxyl-terminated injecting two methyl siloxane and release agent is added to step A2 and are made
Material A 2 in, stir mixing is agglomerating, be made material A 3；
Step A4: material A 3 made from step A3 is subjected to heating refining glue for the first time, discharging, mill is uniform, lower roll, stands
It is carried out after 14h, base rubber is made；
Step B, finished product glue is prepared:
Base rubber mill made from step A4 is uniform, and clot lower roll carries out mixing, then successively by dimethicone, anti-
Electrostatic component and titanate coupling agent are added into base rubber, are mixed, and mixture is made, and then carry out second of heating refining
Glue, discharging, mill is uniform, lower roll, carries out after standing 14h, finished product glue；
Step C, antistatic silicone rubber is prepared:
According to parts by weight, vulcanizing agent is added into finished product glue made from step B, sulfidization molding, antistatic silicon rubber is made
Glue.
In the step A1, the stirring mixing time of composite silicone rubber is 12min；In the step C, sulfidization molding is used
Steam vulcanization (cure) mode, curing temperature are 130 DEG C, time 5min.
In the step A4, the specific steps for the refining glue that heats up for the first time are as follows: material A 3 is warming up to 120 DEG C, is then mediated
60min, kneading is agglomerating, then carries out first time vacuumize process；The time of the first time vacuumize process is 60min, vacuum
Degree is -0.08MPa.
In the step B, the specific steps of second of refining glue that heats up are as follows: mixture is warming up to 120 DEG C, is then mediated
60min, kneading is agglomerating, then carries out second of vacuumize process；The time of second of vacuumize process is 30min, vacuum
Degree is -0.08MPa.
Embodiment 3
A kind of antistatic silicone rubber of electric wire, the raw material including following parts by weight:
The composite silicone rubber is by methyl vinyl silicone rubber A, methyl vinyl silicone rubber B and methyl ethylene silicon rubber
Glue C is with the mixture that weight ratio is that 20:60:20 is formed；Wherein, the contents of ethylene of the methyl vinyl silicone rubber A is
0.06%, methyl content 99.94%, molecular weight is 700,000；The contents of ethylene of the methyl vinyl silicone rubber B is
0.25%, methyl content 99.75%, molecular weight is 700,000；The methyl vinyl silicone rubber C contents of ethylene is 3.5%,
Methyl content is 96.5%, and molecular weight is 700,000.
Above-mentioned methyl vinyl silicone rubber A, methyl vinyl silicone rubber B, methyl vinyl silicone rubber C chemical formula be such as
Shown in lower:
Wherein, the n=8750, m=38 of the methyl vinyl silicone rubber A；The n=of the methyl vinyl silicone rubber B
8550, m=20；The n=8750, m=300 of the methyl vinyl silicone rubber C.
The reinforcing agent is specific surface area in 180m2The precipitated silica of/g.
Every part of antistatic ingredient includes the raw material of following parts by weight:
The mixture that the release agent is made of zinc stearate and stearic acid with weight ratio for 1:1；The vulcanizing agent is
2,5- dimethyl -2,5- di-t-butyl hexane peroxide.
The titanate coupling agent is two (dioctyl phosphite base) tetraisopropyl titanates.
A kind of preparation method of the antistatic silicone rubber of electric wire as described above, includes the following steps:
Step A, base rubber is prepared:
Step A1: in parts by weight, being stirred mixing for composite silicone rubber, and material A 1 is made；
Step A2: according to parts by weight, reinforcing agent is added in five times into material A 1 made from step A1, after mixing evenly
Material A 2 is made；
Step A3: according to parts by weight, successively hydroxyl-terminated injecting two methyl siloxane and release agent is added to step A2 and are made
Material A 2 in, stir mixing is agglomerating, be made material A 3；
Step A4: material A 3 made from step A3 is subjected to heating refining glue for the first time, discharging, mill is uniform, lower roll, stands
It is carried out after 20h, base rubber is made；
Step B, finished product glue is prepared:
Base rubber mill made from step A4 is uniform, and clot lower roll carries out mixing, then successively by dimethicone, anti-
Electrostatic component and titanate coupling agent are added into base rubber, are mixed, and mixture is made, and then carry out second of heating refining
Glue, discharging, mill is uniform, lower roll, carries out after standing 20h, finished product glue；
Step C, antistatic silicone rubber is prepared:
According to parts by weight, vulcanizing agent is added into finished product glue made from step B, sulfidization molding, antistatic silicon rubber is made
Glue.
In the step A1, the stirring mixing time of composite silicone rubber is 15min；In the step C, sulfidization molding is used
Steam vulcanization (cure) mode, curing temperature are 140 DEG C, time 3min.
In the step A4, the specific steps for the refining glue that heats up for the first time are as follows: material A 3 is warming up to 130 DEG C, is then mediated
50min, kneading is agglomerating, then carries out first time vacuumize process；The time of the first time vacuumize process is 70min, vacuum
Degree is -0.06.
In the step B, the specific steps of second of refining glue that heats up are as follows: mixture is warming up to 130 DEG C, is then mediated
50min, kneading is agglomerating, then carries out second of vacuumize process；The time of second of vacuumize process is 40min, vacuum
Degree is -0.06MPa.
Comparative example 1
This comparative example and the difference of above-described embodiment 2 are:
A kind of antistatic silicone rubber of electric wire, the raw material including following parts by weight:
The composite silicone rubber is by methyl vinyl silicone rubber A, methyl vinyl silicone rubber B and methyl ethylene silicon rubber
Glue C is with the mixture that weight ratio is that 20:65:15 is formed；Wherein, the contents of ethylene of the methyl vinyl silicone rubber A is
0.04%, methyl content 99.96%, molecular weight is 650,000；The contents of ethylene of the methyl vinyl silicone rubber B is
0.23%, methyl content 99.77%, molecular weight is 650,000；The methyl vinyl silicone rubber C contents of ethylene is 3%, first
Base content is 97%, and molecular weight is 650,000.
Above-mentioned methyl vinyl silicone rubber A, methyl vinyl silicone rubber B, methyl vinyl silicone rubber C chemical formula be such as
Shown in lower:
Wherein, the n=8780, m=35 of the methyl vinyl silicone rubber A；The n=of the methyl vinyl silicone rubber B
8600, m=19；The n=8770, m=270 of the methyl vinyl silicone rubber C.
The reinforcing agent is specific surface area in 170m2The precipitated silica of/g.
Every part of antistatic ingredient includes the raw material of following parts by weight:
35 parts of acetylene carbon black
1 part of silver-plated copper powder
1 part of carbon fiber.
The mixture that the release agent is made of zinc stearate and stearic acid with weight ratio for 1:1；The vulcanizing agent is
2,5- dimethyl -2,5- di-t-butyl hexane peroxide.
The titanate coupling agent is isopropyl tri(dioctylpyrophosphato)titanate.
Comparative example 2
This comparative example and the difference of above-described embodiment 2 are:
A kind of antistatic silicone rubber of electric wire, the raw material including following parts by weight:
The composite silicone rubber is by methyl vinyl silicone rubber A, methyl vinyl silicone rubber B and methyl ethylene silicon rubber
Glue C is with the mixture that weight ratio is that 20:65:15 is formed；Wherein, the contents of ethylene of the methyl vinyl silicone rubber A is
0.04%, methyl content 99.96%, molecular weight is 650,000；The contents of ethylene of the methyl vinyl silicone rubber B is
0.23%, methyl content 99.77%, molecular weight is 650,000；The methyl vinyl silicone rubber C contents of ethylene is 3%, first
Base content is 97%, and molecular weight is 650,000.
Above-mentioned methyl vinyl silicone rubber A, methyl vinyl silicone rubber B, methyl vinyl silicone rubber C chemical formula be such as
Shown in lower:
Wherein, the n=8780, m=35 of the methyl vinyl silicone rubber A；The n=of the methyl vinyl silicone rubber B
8600, m=19；The n=8770, m=270 of the methyl vinyl silicone rubber C.
The reinforcing agent is specific surface area in 170m2The precipitated silica of/g.
Every part of antistatic ingredient includes the raw material of following parts by weight:
35 parts of acetylene carbon black
1 part of silver-plated copper powder
2 parts of superconductive carbon black.
The mixture that the release agent is made of zinc stearate and stearic acid with weight ratio for 1:1；The vulcanizing agent is
2,5- dimethyl -2,5- di-t-butyl hexane peroxide.
The titanate coupling agent is isopropyl tri(dioctylpyrophosphato)titanate.
Comparative example 3
This comparative example and the difference of above-described embodiment 2 are:
A kind of antistatic silicone rubber of electric wire, the raw material including following parts by weight:
The composite silicone rubber is by methyl vinyl silicone rubber A, methyl vinyl silicone rubber B and methyl ethylene silicon rubber
Glue C is with the mixture that weight ratio is that 20:65:15 is formed；Wherein, the contents of ethylene of the methyl vinyl silicone rubber A is
0.04%, methyl content 99.96%, molecular weight is 650,000；The contents of ethylene of the methyl vinyl silicone rubber B is
0.23%, methyl content 99.77%, molecular weight is 650,000；The methyl vinyl silicone rubber C contents of ethylene is 3%, first
Base content is 97%, and molecular weight is 650,000.
Above-mentioned methyl vinyl silicone rubber A, methyl vinyl silicone rubber B, methyl vinyl silicone rubber C chemical formula be such as
Shown in lower:
Wherein, the n=8780, m=35 of the methyl vinyl silicone rubber A；The n=of the methyl vinyl silicone rubber B
8600, m=19；The n=8770, m=270 of the methyl vinyl silicone rubber C.
The reinforcing agent is specific surface area in 170m2The precipitated silica of/g.
Every part of antistatic ingredient includes the raw material of following parts by weight:
35 parts of acetylene carbon black
1 part of carbon fiber
2 parts of superconductive carbon black.
The mixture that the release agent is made of zinc stearate and stearic acid with weight ratio for 1:1；The vulcanizing agent is
2,5- dimethyl -2,5- di-t-butyl hexane peroxide.
The titanate coupling agent is isopropyl tri(dioctylpyrophosphato)titanate.
Comparative example 4
This comparative example and the difference of above-described embodiment 2 are:
A kind of antistatic silicone rubber, the raw material including following parts by weight:
The composite silicone rubber is by methyl vinyl silicone rubber A, methyl vinyl silicone rubber B and methyl ethylene silicon rubber
Glue C is with the mixture that weight ratio is that 20:65:15 is formed；Wherein, the contents of ethylene of the methyl vinyl silicone rubber A is
0.04%, methyl content 99.96%, molecular weight is 650,000；The contents of ethylene of the methyl vinyl silicone rubber B is
0.23%, methyl content 99.77%, molecular weight is 650,000；The methyl vinyl silicone rubber C contents of ethylene is 3%, first
Base content is 97%, and molecular weight is 650,000.
Above-mentioned methyl vinyl silicone rubber A, methyl vinyl silicone rubber B, methyl vinyl silicone rubber C chemical formula be such as
Shown in lower:
Wherein, the n=8780, m=35 of the methyl vinyl silicone rubber A；The n=of the methyl vinyl silicone rubber B
8600, m=19；The n=8770, m=270 of the methyl vinyl silicone rubber C.
The reinforcing agent is specific surface area in 170m2The precipitated silica of/g.
Every part of antistatic ingredient includes the raw material of following parts by weight:
The mixture that the release agent is made of zinc stearate and stearic acid with weight ratio for 1:1；The vulcanizing agent is
2,5- dimethyl -2,5- di-t-butyl hexane peroxide.
The titanate coupling agent is isopropyl tri(dioctylpyrophosphato)titanate.
Comparative example 5
This comparative example and the difference of above-described embodiment 2 are:
A kind of antistatic silicone rubber of electric wire, the raw material including following parts by weight:
The composite silicone rubber is by methyl vinyl silicone rubber A, methyl vinyl silicone rubber B and methyl ethylene silicon rubber
Glue C is with the mixture that weight ratio is that 20:65:15 is formed；Wherein, the contents of ethylene of the methyl vinyl silicone rubber A is
0.04%, methyl content 99.96%, molecular weight is 650,000；The contents of ethylene of the methyl vinyl silicone rubber B is
0.23%, methyl content 99.77%, molecular weight is 650,000；The methyl vinyl silicone rubber C contents of ethylene is 3%, first
Base content is 97%, and molecular weight is 650,000.
Above-mentioned methyl vinyl silicone rubber A, methyl vinyl silicone rubber B, methyl vinyl silicone rubber C chemical formula be such as
Shown in lower:
Wherein, the n=8780, m=35 of the methyl vinyl silicone rubber A；The n=of the methyl vinyl silicone rubber B
8600, m=19；The n=8770, m=270 of the methyl vinyl silicone rubber C.
The reinforcing agent is specific surface area in 170m2The precipitated silica of/g.
Every part of antistatic ingredient includes the raw material of following parts by weight:
The release agent is zinc stearate or stearic acid；The vulcanizing agent is 2,5- dimethyl -2,5- di-t-butyl peroxide
Change hexane.
The titanate coupling agent is isopropyl tri(dioctylpyrophosphato)titanate.
Silicon rubber made from above-described embodiment 1-3 and comparative example 1-5 is subjected to volume resistivity, tensile strength, pulls apart and stretches
The test of the mechanical and physical performances such as long rate, it is shown that test result is as follows:
By above-mentioned data it is found that antistatic silicone rubber of the invention reduces the volume resistance of material by using antistatic agent
Rate makes silicon rubber have preferable electric conductivity and certain electromagnetic shielding effect, can be by the electrostatic charge in electric wire to unofficial biography
Lead, have the function that it is antistatic, while by using objects such as reinforcing agent, hydroxyl-terminated injecting two methyl siloxane and dimethicones
Material, makes silicon rubber obtained have the performances such as preferable tensile strength, elongation at break, tearing strength, and high mechanical strength is stablized
Property it is high, have a wide range of application.
Compared with Example 2, without using superconductive carbon black in the antistatic ingredient of comparative example 1, silicon rubber obtained
Volume resistivity is larger, and electric conductivity is lower, it is difficult to the electrostatic charge generated in electric wire is conducted outward, antistatic property is smaller,
Illustrate the superconductive carbon black of the invention used by being used in combination with acetylene carbon black, interparticle spacing becomes smaller, interparticle phase mutual connection
It touches probability to increase, increases the electric conductivity of silicon rubber, the electrostatic charge generated in electric wire is conducted outward, reach electric wire silicon rubber
Antistatic property.
Compared with Example 2, without using carbon fiber, the volume of silicon rubber obtained in the antistatic ingredient of comparative example 2
Resistivity is larger, and electric conductivity is lower, it is difficult to conduct the electrostatic charge generated in electric wire outward, antistatic property is smaller, explanation
The volume resistivity of silicon rubber can then be effectively reduced by using a small amount of carbon fiber by the present invention, by the electrostatic generated in electric wire electricity
Lotus is conducted outward, thus have the function that it is antistatic, and can make silicon rubber have certain electromagnetic shielding effect.
Compared with Example 2, without using silver-plated copper powder, the body of silicon rubber obtained in the antistatic ingredient of comparative example 3
Product resistivity is larger, and electric conductivity is lower, illustrates that the present invention by using silver-plated copper powder, utilizes the lower body of surface coated silver layer
Product resistivity, effectively reduces the volume resistivity of the entire particle of silver-plated copper powder, increases the electric conductivity of silicon rubber, will be in electric wire
The electrostatic charge of generation conducts outward, reaches the antistatic property of electric wire silicon rubber.
Compared with Example 2, without using hydroxyl-terminated injecting two methyl siloxane, the drawing of silicon rubber obtained in comparative example 4
It is obvious relatively low to stretch the performances such as intensity, elongation at break, tearing strength, rebound degree is relatively low, illustrates the present invention by using end
Hydroxyl dimethyl silicone polymer is avoided that silicon rubber is hardened in storage placement process, plasticity is lower, processing performance drop
Low structuring phenomenon improves the comprehensive performances such as resilience, tensile strength, elongation at break, the tearing strength of silicon rubber.
Compared with Example 2, in comparative example 5 using the release agent of one-component, using zinc stearate or stearic acid,
The tearing strength of silicon rubber obtained significantly reduces, and illustrates that the release agent of one-component acts on the inside agglomerate of silicon rubber system
It is not obvious, is not easy whole demoulding, be easy to tear after the manufacturing procedures such as subsequent extrusion molding impaired, processing forming is lower.
Above-described embodiment is the preferable implementation of the present invention, and in addition to this, the present invention can be realized with other way,
Do not depart under the premise of present inventive concept it is any obviously replace it is within the scope of the present invention.
Claims (10)
1. a kind of antistatic silicone rubber of electric wire, it is characterised in that: the raw material including following parts by weight:
2. a kind of antistatic silicone rubber of electric wire according to claim 1, it is characterised in that: the composite silicone rubber is
With weight ratio it is 20:60-70 by methyl vinyl silicone rubber A, methyl vinyl silicone rubber B and methyl vinyl silicone rubber C:
The mixture of 10-20 composition；Wherein, the contents of ethylene of the methyl vinyl silicone rubber A is 0.02-0.06%, and methyl contains
Amount is 99.94-99.98%, and molecular weight is 600,000-70 ten thousand；The contents of ethylene of the methyl vinyl silicone rubber B is 0.20-
0.25%, methyl content 99.75-99.80%, molecular weight are 600,000-70 ten thousand；The methyl vinyl silicone rubber C vinyl
Content is 2.5-3.5%, and methyl content 96.5-97.5%, molecular weight is 600,000-70 ten thousand.
3. a kind of antistatic silicone rubber of electric wire according to claim 1, it is characterised in that: the reinforcing agent is than table
Area is in 160-180m2The precipitated silica of/g.
4. a kind of antistatic silicone rubber of electric wire according to claim 1, it is characterised in that: every part described antistatic group
Divide the raw material including following parts by weight:
5. a kind of antistatic silicone rubber of electric wire according to claim 1, it is characterised in that: the release agent is by hard
The mixture that resin acid zinc and stearic acid are formed with weight ratio for 1:1；The vulcanizing agent is 2,5- dimethyl -2,5- di-t-butyl mistake
Aoxidize hexane.
6. a kind of antistatic silicone rubber of electric wire according to claim 1, it is characterised in that: the titanate coupling agent
For three isostearic acid isopropyl titanates, isopropyl tri(dioctylpyrophosphato)titanate and two (dioctyl phosphite base) metatitanic acids
At least one of tetra-isopropyl.
7. a kind of preparation method of the antistatic silicone rubber of electric wire as claimed in any one of claims 1 to 6, it is characterised in that:
Include the following steps:
Step A, base rubber is prepared:
Step A1: in parts by weight, being stirred mixing for composite silicone rubber, and material A 1 is made；
Step A2: according to parts by weight, reinforcing agent is added in five times into material A 1 made from step A1, is made after mixing evenly
Material A 2；
Step A3: according to parts by weight, successively hydroxyl-terminated injecting two methyl siloxane and release agent are added to object made from step A2
Expect in A2, stir mixing is agglomerating, and material A 3 is made；
Step A4: material A 3 made from step A3 is subjected to heating refining glue for the first time, discharging, mill is uniform, lower roll, stands 8-
It is carried out after 20h, base rubber is made；
Step B, finished product glue is prepared:
Base rubber mill made from step A4 is uniform, and clot lower roll carries out mixing, then successively by dimethicone, antistatic
Component and titanate coupling agent are added into base rubber, are mixed, and mixture is made, and then carry out second of heating refining glue, out
Material, mill is uniform, lower roll, carries out after standing 8-20h, finished product glue；
Step C, antistatic silicone rubber is prepared:
According to parts by weight, vulcanizing agent is added into finished product glue made from step B, sulfidization molding, antistatic silicone rubber is made.
8. a kind of preparation method of the antistatic silicone rubber of electric wire according to claim 7, it is characterised in that: the step
In rapid A1, the stirring mixing time of composite silicone rubber is 8-15min；In the step C, sulfidization molding uses steam vulcanization (cure) side
Formula, curing temperature are 150-250 DEG C, time 3-7min.
9. a kind of preparation method of the antistatic silicone rubber of electric wire according to claim 7, it is characterised in that: the step
In rapid A4, the specific steps for the refining glue that heats up for the first time are as follows: material A 3 is warming up to 110-130 DEG C, 50-70min is then mediated, pinches
Synthesis group, then carry out first time vacuumize process；The time of the first time vacuumize process be 50-70min, vacuum degree be-
0.06MPa~-0.10MPa.
10. a kind of preparation method of the antistatic silicone rubber of electric wire according to claim 7, it is characterised in that: described
In step B, the specific steps of second of refining glue that heats up are as follows: mixture is warming up to 110-130 DEG C, then mediates 50-70min,
It mediates agglomerating, then carries out second of vacuumize process；The time of second of vacuumize process is 20-40min, vacuum degree
For -0.06MPa~-0.10MPa.
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| CN114085536A (en) * | 2021-12-09 | 2022-02-25 | 苏州力达精密配件有限公司 | Antistatic non-fading rubber and preparation method thereof |
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| CN112457672A (en) * | 2020-11-27 | 2021-03-09 | 合肥艺光高分子材料科技有限公司 | Antistatic foamed silica gel plate composition and foamed silica gel plate production method |
| CN113337124A (en) * | 2021-05-28 | 2021-09-03 | 浙江恒业成有机硅有限公司 | Platinum vulcanization extrusion precipitation silicone rubber and preparation method thereof |
| CN114085536A (en) * | 2021-12-09 | 2022-02-25 | 苏州力达精密配件有限公司 | Antistatic non-fading rubber and preparation method thereof |
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Address after: 523000 No.1 Building, 23 Weixing Road, Chashan Town, Dongguan City, Guangdong Province Applicant after: Dongguan Langsheng Material Technology Co., Ltd. Address before: 523000 Lianma Road, Xintang Village, Dalingshan Town, Dongguan City, Guangdong Province Applicant before: Dongguan Langsheng Silicon Materials Co., Ltd. |
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Application publication date: 20190329 |