CN109627778A - A kind of electric wire silicon rubber and preparation method thereof that soft squeezes out - Google Patents
A kind of electric wire silicon rubber and preparation method thereof that soft squeezes out Download PDFInfo
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- CN109627778A CN109627778A CN201811425181.7A CN201811425181A CN109627778A CN 109627778 A CN109627778 A CN 109627778A CN 201811425181 A CN201811425181 A CN 201811425181A CN 109627778 A CN109627778 A CN 109627778A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/002—Methods
- B29B7/005—Methods for mixing in batches
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B13/00—Conditioning or physical treatment of the material to be shaped
- B29B13/10—Conditioning or physical treatment of the material to be shaped by grinding, e.g. by triturating; by sieving; by filtering
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
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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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- 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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- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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Abstract
The present invention relates to silicon rubber technical fields, more particularly to the electric wire silicon rubber and preparation method thereof that a kind of soft squeezes out, which includes the raw material of following parts by weight: 90-110 parts of composite silicone rubber, 25-30 parts of reinforcing agent, 2-2.5 parts of hydroxyl-terminated injecting two methyl siloxane, 1-5 parts of dimethicone, 1-3 parts of long-chain alkyl-silicone oil, 0.05-0.15 parts of plasticity regulator, 0.1-0.15 parts of release agent, 1-2 parts of vulcanizing agent and 0.5-1.5 parts of distilled water.Silicon rubber of the invention reduces by using dimethicone, long-chain alkyl-silicone oil and plasticity regulator and squeezes out hardness, and it is matched with other raw materials, make product after molding that there is preferable processing forming, and there are the mechanical performances such as preferable tensile strength, elongation at break, tearing 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 the electric wire silicon rubber and its preparation that a kind of soft squeezes out
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 the extrusion hardness of current silastic material is higher, since high rigidity produces in extrusion process
Raw fluctuation and cause product it is rough, have extrusion screw thread, and processing forming is bad, and mechanical strength is lower, cannot
Meet 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, another object of the present invention is to provide a kind of softs
The electric wire silicon rubber of extrusion, silicon rubber extrusion hardness is lower, and product after molding has preferable processing forming, and has
There are the mechanical performances such as preferable tensile strength, elongation at break, tearing strength, stability is high, has a wide range of application.
The purpose of the present invention is to provide a kind of preparation method for the electric wire silicon rubber that soft squeezes out, the preparation methods
Simple process, convenient operation and control, quality are stablized, and high production efficiency, production cost is low, silicon rubber obtained can be made to have lower
Extrusion hardness, make product after molding that there is preferable processing forming, mechanical performance is good, and stability is high, can extensive work
Industry metaplasia produces.
The purpose of the invention is achieved by the following technical solution: a kind of electric wire silicon rubber that soft squeezes out, including such as
The raw material of lower parts by weight:
The present invention prepares silicon rubber by using the raw material of mentioned kind, can make that silicon rubber is made with lower extrusion firmly
Degree, product after molding has preferable processing forming, and has preferable tensile strength, elongation at break, tearing strength
Etc. mechanical performances, stability it is high, have 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 structurings such as silicon rubber is hardened in waiting to be extruded, storage placement process, plasticity is lower, processing performance reduces
Phenomenon avoids high rigidity when squeezing out from reducing molding effect, so affect the tensile strength of silicon rubber, elongation at break,
The mechanical performances such as tearing strength (need to re-start mixing if the silicon rubber for structuring occurred or heat treatment are gone to improve and be tied
Structure phenomenon, but process costs are increased simultaneously, and reduce production efficiency and quality), meanwhile, terminal hydroxy group polydimethylsiloxanes
Alkane can be reacted with the Si-OH base on reinforcing agent (precipitated silica) surface, be allowed to hydrophobization, and more raising reinforcing agent is in silicon rubber system
In 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
Silicon rubber obtained has lower extrusion hardness, if the dosage of hydroxyl-terminated injecting two methyl siloxane is excessive, silicon rubber is squeezed out
When hardness it is larger, and if the dosage of hydroxyl-terminated injecting two methyl siloxane is very few, reduce the adhesive bond between raw material,
It is easy to appear structuring phenomenon.
The dimethicone of use can improve the plasticity of silicon rubber, reduce hardness, increase flexibility, increase silicon rubber with
The compatibility of the powders such as reinforcing agent；Long-chain alkyl-silicone oil can effectively improve the profit of silicon rubber as modified polysiloxane
Slip and release property so that silicon rubber is easy to demould after shaping, will not because with die bonds, be difficult to damage silicon rubber due to demoulding
Glue；The plasticity regulator of use can improve the plasticity of silicon rubber, improve the release property of finished product；The vulcanizing agent of use can be effective
The vulcanization crosslinking effect for improving silicon rubber, improves the mechanical strength and stability of silicon rubber after molding；The distillation water energy of use
Temporary structuring phenomenon control action is played, the dosage of hydroxyl-terminated injecting two methyl siloxane is avoided to add excessive and make silicon rubber
The extrusion hardness of glue is excessive.
Preferably, the composite silicone rubber is by methyl vinyl silicone rubber A and methyl vinyl silicone rubber B with weight ratio
For the mixture of 40-50:50-60 composition；Wherein, the contents of ethylene of the methyl vinyl silicone rubber A is 0.25-
0.35%, methyl content 99.65-99.75%, molecular weight are 450,000-55 ten thousand；The ethylene of the methyl vinyl silicone rubber B
Base content is 0.06-0.10%, and methyl content 99.90-99.94%, molecular weight is 500,000-70 ten thousand.
The present invention compounds composition by using two 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 both strict controls, the characteristic grown using high molecular weight, main chain,
Intermolecular active force is larger, and silicon rubber obtained can be made to have preferable mechanical strength and processing forming, wherein according to
Methyl vinyl silicone rubber A and methyl vinyl silicone rubber B contents of ethylene it is very few, then reduce silicon rubber vulcanization make
With, if the contents of ethylene of methyl vinyl silicone rubber is excessive, reduce vulcanization after silicon rubber heat-resisting；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 the chemical formula of above-mentioned methyl vinyl silicone rubber A, methyl vinyl silicone rubber B are following institute
Show:
Wherein, the n=5750-5850, m=15-20 of the methyl vinyl silicone rubber A；The methyl ethylene silicon rubber
The n=8730-8770 of glue B, m=5-10.
Preferably, the reinforcing agent is specific surface area in 200-300m2The gas-phase silica of/g.
The present invention can effectively improve the mechanical strength of silicon rubber by using gas-phase silica, and strict control gas phase is white
The specific surface area of carbon black, partial size is small, gas-phase silica can be made to be well dispersed in silicon rubber, effectively improves the intensity of silicon rubber.
Preferably, the plasticity regulator is with weight ratio by disodium hydrogen phosphate and poly- sodium methyl silicate for 0.05-
The mixture of 0.10:0.01-0.05 composition.
The present invention can significantly improve the plasticity and processing forming of silicon rubber by using above-mentioned plasticity regulator,
The release property for improving product, improves the mechanical performances such as tensile strength, elongation at break, the tearing strength of silicon rubber.
Preferably, the release agent is with weight ratio by zinc stearate, stearic acid for 0.001-0.06:0.06-0.12 group
At mixture.
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.
Preferably, the vulcanizing agent is 2,4- dichlorobenzoperoxide, 2,5- dimethyl -2,5- di-tert-butyl peroxide
At least one of hexane and cumyl peroxide.
The present invention can improve the vulcanization crosslinking effect of silicon rubber system by using above-mentioned vulcanizing agent, significant to shorten vulcanization
Time improves the mechanical strengths such as the tensile strength, elongation at break, tearing strength of silicon rubber after molding and stability.More
Preferably, the vulcanizing agent is 2,4- dichlorobenzoperoxide.
Another object of the present invention is achieved through the following technical solutions: a kind of electric wire use that soft as described above squeezes out
The preparation method of silicon rubber, includes the following steps:
(1), composite silicone rubber in parts by weight, is warming up to 55-65 DEG C of preheating, is then stirred mixing, is made
Material A；
(2), according to parts by weight, by reinforcing agent, hydroxyl-terminated injecting two methyl siloxane, dimethicone, long-chain alkyl-silicone oil,
Release agent, vulcanizing agent and distilled water are uniformly mixed, and material B is made；
(3), material B equivalent made from step (2) is added in four times into material A made from step (1), stir mixing
It is agglomerating, material C is made；
(4), it heats up to material C made from step (3), carries out first time kneading, plasticity regulator is then added, carry out
Second of kneading, then vacuumize process is carried out, mixture is made；
(5), mixture made from step (4) is discharged, mill is uniform, lower roll, is filtered after standing 1.5-2.5h, makes
Obtain mill glue；
(6), mill glue made from step (5) is subjected to sulfidization molding, the electric wire silicon rubber that soft squeezes out is made.
The present invention prepares silicon rubber by using above-mentioned steps, and simple process, convenient operation and control, quality is stable, production
High-efficient, production cost is low, and silicon rubber extrusion hardness obtained can be made lower, be readily extruded molding, and have and preferably stretch
The mechanical performances such as intensity, elongation at break, tearing strength, stability is high, can large-scale industrial production；Wherein, by first will
Reinforcing agent, hydroxyl-terminated injecting two methyl siloxane, dimethicone, long-chain alkyl-silicone oil, release agent, vulcanizing agent and distilled water mixing
Material B is made, then equivalent is added into material A in batches by material B, (equivalent addition in batches mixes after upper primary addition stirs
It is further continued for putting into next material after mixing to no powder state), the intensity, plastic of silicon rubber can be gradually increased by being added portionwise
Degree, lubricity, release property and vulcanization crosslinking speed etc. reduce hardness, increase flexibility, increase the compatible of each raw material of silicon rubber
Property, plasticity regulator is then added after mediating for the first time, then carry out the second low kneading processing, improves the plastic of silicon rubber
Property, the extrusion hardness of silicon rubber is reduced, makes silicon rubber obtained that there is preferable tensile strength, elongation at break, tearing strength
Etc. mechanical performances.
Preferably, in the step (1), the time for stirring mixing is 3-8min；In the step (5), the filtering is adopted
It is filtered with 180-220 mesh filter screen.
The present invention by the stirring mixing time of strict control composite silicone rubber, can improve methyl vinyl silicone rubber A and
The degree of mixing of methyl vinyl silicone rubber B improves the mechanical performances such as tensile strength, elongation at break, the tearing strength of silicon rubber,
It reduces it and squeezes out hardness.And step (5) is filtered by using 80-220 mesh filter screen, removes what material reunion in mixing process generated
Bulky grain improves the sophistication and uniformity of material, make material it is evenly dispersed, carry out vulcanization crosslinking；.
Preferably, in the step (4), material C is warming up to 100-150 DEG C, the time mediated for the first time is 30-
100min, second of the time mediated is 50-60min, and the time of vacuumize process is 50-70min, and vacuum degree is -0.06MPa
~-0.09MPa.
The present invention can improve plasticity regulator and material C is each by will add plasticity regulator after material C heating
Intersolubility between raw material effectively improves the plasticity of silicon rubber, the release property after improving subsequent forming, and carries out again second
It mediates, and is vacuum-treated, the agglomerating effect of kneading of material can be improved, improve the formability of silicon rubber, stretch by force
The mechanical performances such as degree, elongation at break, tearing strength.More preferably, material C is warming up to 100 DEG C, 110 DEG C, 120 DEG C, 130
DEG C, 140 DEG C or 150 DEG C, for the first time mediate time be 30min, 50min, 60min, 70min, 80min or 100min, second
The time of secondary kneading is 50min, 52min, 55min, 58min or 60min, time of vacuumize process be 50min, 55min,
60min, 65min or 70min, vacuum degree are -0.06MPa, -0.07MPa, -0.08MPa or -0.09MPa.
Preferably, in the step (6), the temperature of sulfidization molding is 120-150 DEG C, time 5-15min.
The present invention passes through the temperature and time of strict control sulfidization molding, can improve the mechanical strength and stabilization of silicon rubber
Property, it reduces squeezing out hardness, silicon rubber obtained is made to have preferable processing forming, tensile strength, elongation at break, tearing strong
The comprehensive performances such as degree.More preferably, in the step (6), the temperature of sulfidization molding is 120 DEG C, 130 DEG C, 140 DEG C or 150
DEG C, the time of sulfidization molding is 5min, 8min, 10min, 12min or 15min.
The beneficial effects of the present invention are: silicon rubber of the invention by using dimethicone, long-chain alkyl-silicone oil and
Plasticity regulator, which reduces, squeezes out hardness, and matches with other raw materials, and product after molding is made to have preferable machine-shaping
Property, and there are the mechanical performances such as preferable tensile strength, elongation at break, tearing strength, stability is high, has a wide range of application.
Silicon rubber preparation method simple process of the invention, convenient operation and control, quality are stablized, high production efficiency, production
It is at low cost, it can make silicon rubber obtained that there is lower extrusion hardness, make product after molding that there is preferable processing forming,
Mechanical performance is good, and stability is high, can large-scale industrial 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 electric wire silicon rubber that soft squeezes out, the raw material including following parts by weight:
The composite silicone rubber is with weight ratio by methyl vinyl silicone rubber A and methyl vinyl silicone rubber B for 50:50
The mixture of composition；Wherein, the contents of ethylene of the methyl vinyl silicone rubber A is 0.3%, methyl content 99.70%,
Molecular weight is 500,000；The contents of ethylene of the methyl vinyl silicone rubber B is 0.08%, methyl content 99.92%, molecule
Amount is 600,000.
Above-mentioned methyl vinyl silicone rubber A, methyl vinyl silicone rubber B chemical formula be as follows:
Wherein, the n=5800, m=18 of the methyl vinyl silicone rubber A；The n=of the methyl vinyl silicone rubber B
8750, m=7.
The reinforcing agent is specific surface area in 200m2The gas-phase silica of/g.
The plasticity regulator is what 0.07:0.03 was formed with weight ratio by disodium hydrogen phosphate and poly- sodium methyl silicate
Mixture.
The mixture that the release agent is made of zinc stearate, stearic acid with weight ratio for 0.04:0.08.
The vulcanizing agent is 2,5- dimethyl -2,5- di-t-butyl hexane peroxide.
A kind of preparation method for the electric wire silicon rubber that soft as described above squeezes out, includes the following steps:
(1), composite silicone rubber in parts by weight, is warming up to 55 DEG C of preheatings, is then stirred mixing, material is made
A；
(2), according to parts by weight, by reinforcing agent, hydroxyl-terminated injecting two methyl siloxane, dimethicone, long-chain alkyl-silicone oil,
Release agent, vulcanizing agent and distilled water are uniformly mixed, and material B is made；
(3), material B equivalent made from step (2) is added in four times into material A made from step (1), stir mixing
It is agglomerating, material C is made；
(4), it heats up to material C made from step (3), carries out first time kneading, plasticity regulator is then added, carry out
Second of kneading, then vacuumize process is carried out, mixture is made；
(5), mixture made from step (4) is discharged, mill is uniform, lower roll, is filtered after standing 1.5h, is made and opens
Refining glue；
(6), mill glue made from step (5) is subjected to sulfidization molding, the electric wire silicon rubber that soft squeezes out is made.
In the step (1), the time for stirring mixing is 3min；In the step (5), the filtering is filtered using 180 mesh
Net filtration.
In the step (4), material C is warming up to 100 DEG C, the time mediated for the first time is 30min, second of kneading
Time is 50min, and the time of vacuumize process is 50min, and vacuum degree is -0.09MPa.
In the step (6), the temperature of sulfidization molding is 120 DEG C, time 15min.
Embodiment 2
A kind of electric wire silicon rubber that soft squeezes out, the raw material including following parts by weight:
The composite silicone rubber is with weight ratio by methyl vinyl silicone rubber A and methyl vinyl silicone rubber B for 40:60
The mixture of composition；Wherein, the contents of ethylene of the methyl vinyl silicone rubber A is 0.25%, and methyl content is
99.75%, molecular weight is 450,000；The contents of ethylene of the methyl vinyl silicone rubber B is 0.06%, and methyl content is
99.94%, molecular weight is 500,000.
Above-mentioned methyl vinyl silicone rubber A, methyl vinyl silicone rubber B chemical formula be as follows:
Wherein, the n=5850, m=15 of the methyl vinyl silicone rubber A；The n=of the methyl vinyl silicone rubber B
8770, m=5.
The reinforcing agent is specific surface area in 250m2The gas-phase silica of/g.
The plasticity regulator is what 0.10:0.01 was formed with weight ratio by disodium hydrogen phosphate and poly- sodium methyl silicate
Mixture.
The mixture that the release agent is made of zinc stearate, stearic acid with weight ratio for 0.001:0.12.
The vulcanizing agent is 2,4- dichlorobenzoperoxide.
A kind of preparation method for the electric wire silicon rubber that soft as described above squeezes out, includes the following steps:
(1), composite silicone rubber in parts by weight, is warming up to 60 DEG C of preheatings, is then stirred mixing, material is made
A；
(2), according to parts by weight, by reinforcing agent, hydroxyl-terminated injecting two methyl siloxane, dimethicone, long-chain alkyl-silicone oil,
Release agent, vulcanizing agent and distilled water are uniformly mixed, and material B is made；
(3), material B equivalent made from step (2) is added in four times into material A made from step (1), stir mixing
It is agglomerating, material C is made；
(4), it heats up to material C made from step (3), carries out first time kneading, plasticity regulator is then added, carry out
Second of kneading, then vacuumize process is carried out, mixture is made；
(5), mixture made from step (4) is discharged, mill is uniform, lower roll, is filtered after standing 2h, and mill is made
Glue；
(6), mill glue made from step (5) is subjected to sulfidization molding, the electric wire silicon rubber that soft squeezes out is made.
In the step (1), the time for stirring mixing is 5min；In the step (5), the filtering is filtered using 200 mesh
Net filtration.
In the step (4), material C is warming up to 130 DEG C, the time mediated for the first time is 60min, second of kneading
Time is 55min, and the time of vacuumize process is 60min, and vacuum degree is -0.08MPa.
In the step (6), the temperature of sulfidization molding is 135 DEG C, time 10min.
Embodiment 3
A kind of electric wire silicon rubber that soft squeezes out, the raw material including following parts by weight:
The composite silicone rubber is with weight ratio by methyl vinyl silicone rubber A and methyl vinyl silicone rubber B for 45:55
The mixture of composition；Wherein, the contents of ethylene of the methyl vinyl silicone rubber A is 0.35%, and methyl content is
99.65%, molecular weight is 550,000；The contents of ethylene of the methyl vinyl silicone rubber B is 0.10%, and methyl content is
99.90%, molecular weight is 700,000.
Above-mentioned methyl vinyl silicone rubber A, methyl vinyl silicone rubber B chemical formula be as follows:
Wherein, the n=5750, m=120 of the methyl vinyl silicone rubber A；The n=of the methyl vinyl silicone rubber B
8730, m=10.
The reinforcing agent is specific surface area in 300m2The gas-phase silica of/g.
The plasticity regulator is what 0.05:0.05 was formed with weight ratio by disodium hydrogen phosphate and poly- sodium methyl silicate
Mixture.
The mixture that the release agent is made of zinc stearate, stearic acid with weight ratio for 0.06:0.06.
The vulcanizing agent is cumyl peroxide.
A kind of preparation method for the electric wire silicon rubber that soft as described above squeezes out, includes the following steps:
(1), composite silicone rubber in parts by weight, is warming up to 65 DEG C of preheatings, is then stirred mixing, material is made
A；
(2), according to parts by weight, by reinforcing agent, hydroxyl-terminated injecting two methyl siloxane, dimethicone, long-chain alkyl-silicone oil,
Release agent, vulcanizing agent and distilled water are uniformly mixed, and material B is made；
(3), material B equivalent made from step (2) is added in four times into material A made from step (1), stir mixing
It is agglomerating, material C is made；
(4), it heats up to material C made from step (3), carries out first time kneading, plasticity regulator is then added, carry out
Second of kneading, then vacuumize process is carried out, mixture is made；
(5), mixture made from step (4) is discharged, mill is uniform, lower roll, is filtered after standing 2.5h, is made and opens
Refining glue；
(6), mill glue made from step (5) is subjected to sulfidization molding, the electric wire silicon rubber that soft squeezes out is made.
In the step (1), the time for stirring mixing is 8min；In the step (5), the filtering is filtered using 220 mesh
Net filtration.
In the step (4), material C is warming up to 150 DEG C, the time mediated for the first time is 100min, second of kneading
Time be 60min, time of vacuumize process is 70min, and vacuum degree is -0.06MPa.
In the step (6), the temperature of sulfidization molding is 150 DEG C, time 5min.
Comparative example 1
This comparative example and the difference of above-described embodiment 2 are:
A kind of silicon rubber, the raw material including following parts by weight:
The composite silicone rubber is with weight ratio by methyl vinyl silicone rubber A and methyl vinyl silicone rubber B for 40:60
The mixture of composition；Wherein, the contents of ethylene of the methyl vinyl silicone rubber A is 0.25%, and methyl content is
99.75%, molecular weight is 450,000；The contents of ethylene of the methyl vinyl silicone rubber B is 0.06%, and methyl content is
99.94%, molecular weight is 500,000.
Above-mentioned methyl vinyl silicone rubber A, methyl vinyl silicone rubber B chemical formula be as follows:
Wherein, the n=5850, m=15 of the methyl vinyl silicone rubber A；The n=of the methyl vinyl silicone rubber B
8770, m=5.
The reinforcing agent is specific surface area in 250m2The gas-phase silica of/g.
The plasticity regulator is what 0.10:0.01 was formed with weight ratio by disodium hydrogen phosphate and poly- sodium methyl silicate
Mixture.
The mixture that the release agent is made of zinc stearate, stearic acid with weight ratio for 0.001:0.12.
The vulcanizing agent is 2,4- dichlorobenzoperoxide.
Comparative example 2
This comparative example and the difference of above-described embodiment 2 are:
A kind of silicon rubber, the raw material including following parts by weight:
The composite silicone rubber is with weight ratio by methyl vinyl silicone rubber A and methyl vinyl silicone rubber B for 40:60
The mixture of composition；Wherein, the contents of ethylene of the methyl vinyl silicone rubber A is 0.25%, and methyl content is
99.75%, molecular weight is 450,000；The contents of ethylene of the methyl vinyl silicone rubber B is 0.06%, and methyl content is
99.94%, molecular weight is 500,000.
Above-mentioned methyl vinyl silicone rubber A, methyl vinyl silicone rubber B chemical formula be as follows:
Wherein, the n=5850, m=15 of the methyl vinyl silicone rubber A；The n=of the methyl vinyl silicone rubber B
8770, m=5.
The reinforcing agent is specific surface area in 250m2The gas-phase silica of/g.
The plasticity regulator is what 0.10:0.01 was formed with weight ratio by disodium hydrogen phosphate and poly- sodium methyl silicate
Mixture.
The mixture that the release agent is made of zinc stearate, stearic acid with weight ratio for 0.001:0.12.
The vulcanizing agent is 2,4- dichlorobenzoperoxide.
Comparative example 3
This comparative example and the difference of above-described embodiment 2 are:
A kind of silicon rubber, the raw material including following parts by weight:
The composite silicone rubber is with weight ratio by methyl vinyl silicone rubber A and methyl vinyl silicone rubber B for 40:60
The mixture of composition；Wherein, the contents of ethylene of the methyl vinyl silicone rubber A is 0.25%, and methyl content is
99.75%, molecular weight is 450,000；The contents of ethylene of the methyl vinyl silicone rubber B is 0.06%, and methyl content is
99.94%, molecular weight is 500,000.
Above-mentioned methyl vinyl silicone rubber A, methyl vinyl silicone rubber B chemical formula be as follows:
Wherein, the n=5850, m=15 of the methyl vinyl silicone rubber A；The n=of the methyl vinyl silicone rubber B
8770, m=5.
The reinforcing agent is specific surface area in 250m2The gas-phase silica of/g.
The plasticity regulator is what 0.10:0.01 was formed with weight ratio by disodium hydrogen phosphate and poly- sodium methyl silicate
Mixture.
The mixture that the release agent is made of zinc stearate, stearic acid with weight ratio for 0.001:0.12.
The vulcanizing agent is 2,4- dichlorobenzoperoxide.
Comparative example 4
This comparative example and the difference of above-described embodiment 2 are:
A kind of silicon rubber, the raw material including following parts by weight:
The composite silicone rubber is with weight ratio by methyl vinyl silicone rubber A and methyl vinyl silicone rubber B for 40:60
The mixture of composition；Wherein, the contents of ethylene of the methyl vinyl silicone rubber A is 0.25%, and methyl content is
99.75%, molecular weight is 450,000；The contents of ethylene of the methyl vinyl silicone rubber B is 0.06%, and methyl content is
99.94%, molecular weight is 500,000.
Above-mentioned methyl vinyl silicone rubber A, methyl vinyl silicone rubber B chemical formula be as follows:
Wherein, the n=5850, m=15 of the methyl vinyl silicone rubber A；The n=of the methyl vinyl silicone rubber B
8770, m=5.
The reinforcing agent is specific surface area in 250m2The gas-phase silica of/g.
The mixture that the release agent is made of zinc stearate, stearic acid with weight ratio for 0.001:0.12.
The vulcanizing agent is 2,4- dichlorobenzoperoxide.
Comparative example 5
This comparative example and the difference of above-described embodiment 2 are:
A kind of silicon rubber, the raw material including following parts by weight:
The composite silicone rubber is with weight ratio by methyl vinyl silicone rubber A and methyl vinyl silicone rubber B for 40:60
The mixture of composition；Wherein, the contents of ethylene of the methyl vinyl silicone rubber A is 0.25%, and methyl content is
99.75%, molecular weight is 450,000；The contents of ethylene of the methyl vinyl silicone rubber B is 0.06%, and methyl content is
99.94%, molecular weight is 500,000.
Above-mentioned methyl vinyl silicone rubber A, methyl vinyl silicone rubber B chemical formula be as follows:
Wherein, the n=5850, m=15 of the methyl vinyl silicone rubber A；The n=of the methyl vinyl silicone rubber B
8770, m=5.
The reinforcing agent is specific surface area in 250m2The gas-phase silica of/g.
The plasticity regulator is disodium hydrogen phosphate or poly- sodium methyl silicate.
The mixture that the release agent is made of zinc stearate, stearic acid with weight ratio for 0.001:0.12.
The vulcanizing agent is 2,4- dichlorobenzoperoxide.
Silicon rubber made from above-described embodiment 1-3 and comparative example 1-5 is subjected to hardness, tensile strength, elongation at break, is torn
The test of the mechanical and physical performances such as resistance to spalling, it is shown that test result is as follows:
By above-mentioned data it is found that silicon rubber of the invention has lower extrusion hardness, product after molding has preferable
Processing forming, and there are the mechanical performances such as preferable tensile strength, elongation at break, tearing strength, stability is high, application
Range is wide.
Compared with comparative example 1, without using dimethicone in comparative example 1, silicon rubber hardness obtained is significantly higher, returns
Elasticity is lower, and suppleness is weaker, and tensile strength, elongation at break, the performance of tearing strength are obvious relatively low, illustrates that the present invention is logical
The plasticity that can significantly improve silicon rubber using dimethicone is crossed, hardness is reduced, increases flexibility.
Compared with comparative example 2, without using long-chain alkyl-silicone oil in comparative example 2, tensile strength of silicon rubber obtained is significant
Lower, hardness is higher, and resilience is lower, and elongation at break, tearing strength are obvious relatively low, illustrates the present invention by using long-chain
The modified polysiloxane of alkyl-silicone oil, the tensile strength that can improve silicon rubber is significant, and can improve the lubricity of silicon rubber
And release property, so that silicon rubber is easy to demould after shaping, processing forming is good.
Compared with comparative example 3, in comparative example 3 without use hydroxyl-terminated injecting two methyl siloxane, silicon rubber obtained it is hard
Degree is higher, and the performances such as tensile strength, elongation at break, tearing strength are obvious relatively low, illustrates the present invention by using end hydroxyl
Base dimethyl silicone polymer is avoided that silicon rubber is hardened in storage placement process, plasticity is lower, processing performance reduces
Equal structuring phenomenons, can reduce the extrusion hardness of silicon rubber, improve the tensile strength, elongation at break, tearing strength of silicon rubber
Etc. comprehensive performances.
Compared with comparative example 4, without using plasticity regulator in comparative example 4, the hardness of silicon rubber obtained is higher, soft
Soft lower, the performances such as tensile strength, elongation at break, tearing strength are obvious relatively low, illustrate the present invention by using plastic
Degree regulator can improve the plasticity of silicon rubber, reduce it and squeeze out hardness, improve the release property and processing forming of finished product.
Compared with comparative example 5, plasticity regulator (disodium hydrogen phosphate or the poly- methyl of one-component are used in comparative example 5
Sodium metasilicate), for silicon rubber obtained compared with the present invention is using the plasticity regulator of compounding component, hardness is higher, tensile strength,
The performances such as elongation at break, tearing strength are lower, illustrate that the present invention is multiple by using disodium hydrogen phosphate and poly- sodium methyl silicate
Plasticity regulator made of matching can effectively improve the plasticity of silicon rubber, reduce its hardness, improve the machine-shaping of silicon rubber
Property and release property, improve stability.
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. the electric wire silicon rubber that a kind of soft squeezes out, it is characterised in that: the raw material including following parts by weight:
2. the electric wire that a kind of soft according to claim 1 squeezes out is with silicon rubber, it is characterised in that: the composite silicone rubber
The mixture being made of methyl vinyl silicone rubber A and methyl vinyl silicone rubber B with weight ratio for 40-50:50-60；Its
In, the contents of ethylene of the methyl vinyl silicone rubber A is 0.25-0.35%, methyl content 99.65-99.75%, is divided
Son amount is 450,000-55 ten thousand；The contents of ethylene of the methyl vinyl silicone rubber B is 0.06-0.10%, and methyl content is
99.90-99.94%, molecular weight are 500,000-70 ten thousand.
3. the electric wire that a kind of soft according to claim 1 squeezes out is with silicon rubber, it is characterised in that: the reinforcing agent be than
Surface area is in 200-300m2The gas-phase silica of/g.
4. the electric wire that a kind of soft according to claim 1 squeezes out is with silicon rubber, it is characterised in that: the plasticity is adjusted
The mixture that agent is made of disodium hydrogen phosphate and poly- sodium methyl silicate with weight ratio for 0.05-0.10:0.01-0.05.
5. the electric wire that a kind of soft according to claim 1 squeezes out is with silicon rubber, it is characterised in that: the release agent be by
Zinc stearate, stearic acid are with the mixture that weight ratio is that 0.001-0.06:0.06-0.12 is formed.
6. the electric wire that a kind of soft according to claim 1 squeezes out is with silicon rubber, it is characterised in that: the vulcanizing agent is 2,
In 4- dichlorobenzoperoxide, 2,5- dimethyl -2,5- di-t-butyl hexane peroxide and cumyl peroxide at least
It is a kind of.
7. a kind of preparation method for the electric wire silicon rubber that soft as claimed in any one of claims 1 to 6 squeezes out, feature
It is: includes the following steps:
(1), composite silicone rubber in parts by weight, is warming up to 55-65 DEG C of preheating, is then stirred mixing, material is made
A；
(2), according to parts by weight, by reinforcing agent, hydroxyl-terminated injecting two methyl siloxane, dimethicone, long-chain alkyl-silicone oil, demoulding
Agent, vulcanizing agent and distilled water are uniformly mixed, and material B is made；
(3), material B equivalent made from step (2) is added in four times into material A made from step (1), stir mixing at
Material C is made in group；
(4), it heats up to material C made from step (3), carries out first time kneading, plasticity regulator is then added, carry out second
Secondary kneading, then vacuumize process is carried out, mixture is made；
(5), mixture made from step (4) is discharged, mill is uniform, lower roll, is filtered after standing 1.5-2.5h, is made and opens
Refining glue；
(6), mill glue made from step (5) is subjected to sulfidization molding, the electric wire silicon rubber that soft squeezes out is made.
8. the electric wire that a kind of soft according to claim 7 the squeezes out preparation method of silicon rubber, it is characterised in that: described
In step (1), the time for stirring mixing is 3-8min；In the step (5), the filtering is filtered using 180-220 mesh filter screen.
9. the electric wire that a kind of soft according to claim 7 the squeezes out preparation method of silicon rubber, it is characterised in that: described
In step (4), material C is warming up to 100-150 DEG C, the time mediated for the first time is 30-100min, second of the time mediated
For 50-60min, the time of vacuumize process is 50-70min, and vacuum degree is -0.06MPa~-0.09MPa.
10. the electric wire that a kind of soft according to claim 7 the squeezes out preparation method of silicon rubber, it is characterised in that: institute
It states in step (6), the temperature of sulfidization molding is 120-150 DEG C, time 5-15min.
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