CN106566259A - Silicone rubber foaming material and preparation method thereof - Google Patents
Silicone rubber foaming material and preparation method thereof Download PDFInfo
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- CN106566259A CN106566259A CN201610973317.2A CN201610973317A CN106566259A CN 106566259 A CN106566259 A CN 106566259A CN 201610973317 A CN201610973317 A CN 201610973317A CN 106566259 A CN106566259 A CN 106566259A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- 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
-
- 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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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
- C08J9/10—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing nitrogen, the blowing agent being a compound containing a nitrogen-to-nitrogen bond
- C08J9/102—Azo-compounds
- C08J9/103—Azodicarbonamide
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
- C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
- C08J9/06—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent
- C08J9/10—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a chemical blowing agent developing nitrogen, the blowing agent being a compound containing a nitrogen-to-nitrogen bond
- C08J9/107—Nitroso compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
- C08K13/06—Pretreated ingredients and ingredients covered by the main groups C08K3/00 - C08K7/00
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/14—Peroxides
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/04—Ingredients treated with organic substances
- C08K9/06—Ingredients treated with organic substances with silicon-containing compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2203/00—Foams characterized by the expanding agent
- C08J2203/04—N2 releasing, ex azodicarbonamide or nitroso compound
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2383/00—Characterised by the use 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; Derivatives of such polymers
- C08J2383/04—Polysiloxanes
- C08J2383/07—Polysiloxanes containing silicon bound to unsaturated aliphatic groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/14—Applications used for foams
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- 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
Abstract
The invention belongs to the technical field of materials, and relates to a silicone rubber foaming material. Two vulcanizing agent compounding technologies with different vulcanizing temperatures are adopted, vulcanizing foaming technological conditions suitable for a vulcanizing agent compounding system are adopted, a preparation method of two-stage high-temperature mold pressing vulcanizing foaming and thermal treatment shaping is adopted, and the silicone rubber foaming material is obtained. The silicone rubber foaming material is prepared through a two-stage mold pressing vulcanizing foaming process and is at least prepared from, by mass, 100 parts of silicone rubber, 20-60 parts of foaming agent, 20-60 parts of fortifier, 0.2-0.5 part of vulcanizing agent, 0.3-1.0 part of vulcanizing agent B, 2-7 parts of foaming agent, 2-4 parts of foaming promoter and 0-10 parts of modifier. The silicone rubber foaming material is high in designability, even in bubble, smooth in surface, precise in dimension, small in density, stable in high and low temperature rigidity and small in compression permanent deformation. The silicone rubber foaming material is suitable for buffering and damping materials, especially suitable for preparing large-sized products. The silicone rubber foaming material is simple in preparation process, easy to operate, good in stability and suitable for volume production.
Description
Technical field
The invention belongs to field of material technology, is related to foam rubbery material design and process technology, more particularly to silicon rubber
Expanded material is designed and process technology.
Background technology
Foamed silastic material is the porous polymer elastomeric material prepared after silicon rubber vulcanization foaming, with silicon rubber
The low-density characteristic of the characteristics such as resistant of high or low temperature, chemical stability, resistance to ag(e)ing and foam, can as buffering, vibration damping, it is heat-insulated,
Contour performance materials are sealed, the fields such as Aero-Space, national defense industry, electronics industry are applied to.
Key issue in the research of silicon rubber expanded material is the compatibility design of sulfidation and foaming process, is vulcanized
Whether journey matches the success or not for determining prepared by expanded material with foaming process, is expanded material foam structure, density, strong
The basic influence factor of the performances such as degree, rigidity, hardness, compression set.Silicon rubber expanded material sulfidation with foamed
The matching relationship of journey is reached by material prescription and the joint effect of preparation technology by silicone rubber formulations and preparation technology matched design
Designed capacity is matched and is formed to silicon rubber expanded material sulfidation and foaming process, the property to silicon rubber expanded material
Can improve and extensively using significant.
In the research report of existing foamed silastic material, do not find with regard to two kinds of vulcanizing agent compounded formulas and two sections of moldings
The matched design research of sulfur foam, heat treatment shaping technique, prior art does not support three-dimensional structure large scale and exact scale
The preparation of very little foamed silastic material product.
The content of the invention
The purpose of the present invention is for the deficiencies in the prior art, there is provided a kind of formula of silicon rubber expanded material and its preparation
Method.
The object of the present invention is achieved like this, using the vulcanizing agent compounded technology of two kinds of different curing temperatures, to vulcanize
The suitable sulfur foam process conditions of agent compound system, using two sections of hot press moulding sulfur foams and the preparation side of heat treatment shaping
Method, obtains foamed silastic material according to the present invention.
Silicon rubber expanded material according to the present invention, is prepared, the quality group of material using two sections of molding sulfur foam techniques
Into at least including：
100 parts of silicon rubber,
20 ~ 60 parts of reinforcing agent,
0.2 ~ 0.5 part of vulcanizing agent A,
0.3 ~ 1.0 part of vulcanizing agent B,
2 ~ 7 parts of foaming agent,
2 ~ 4 parts of blowing promotor,
0 ~ 10 part of conditioning agent；
The silicon rubber is the one kind in vinylsiloxane rubber, phenyl siloxane rubber；Vulcanizing agent A is benzoyl peroxide, peroxidating
Double one kind in chlorobenzoyl, 2,4- dichlorobenzoperoxides；Vulcanizing agent B is cumyl peroxide, the uncle of peroxidating two
One kind in butyl, 2,5- dimethyl -2,5- di-t-butyl hexane peroxides；The foaming agent is azodicarbonamide, two sub-
One kind in the methine tetramine of nitro five；Blowing promotor is the one kind in urea, urea fat；Conditioning agent is methyl-silicone oil, phenyl
One kind in silicone oil.
Silicon rubber expanded material according to the present invention, the quality composition of material at least includes：Optimization component
100 parts of silicon rubber,
25 ~ 45 parts of reinforcing agent,
0.25 ~ 0.4 part of vulcanizing agent A,
0.4 ~ 0.7 part of vulcanizing agent B,
2.5 ~ 4.5 parts of foaming agent,
2.5 ~ 3.5 parts of blowing promotor,
2.5 ~ 10 parts of conditioning agent.
Silicon rubber expanded material according to the present invention, the quality composition of material at least includes：
100 parts of silicon rubber,
25 ~ 50 parts of reinforcing agent,
0.2 ~ 0.3 part of vulcanizing agent A,
0.5 ~ 1.0 part of vulcanizing agent B,
2 ~ 4 parts of foaming agent,
3 ~ 4 parts of blowing promotor,
0 ~ 10 part of conditioning agent.
Silicon rubber expanded material according to the present invention, the quality composition of material at least includes：
100 parts of silicon rubber,
30 ~ 60 parts of reinforcing agent,
0.3 ~ 0.5 part of vulcanizing agent A,
0.3 ~ 0.5 part of vulcanizing agent B,
3 ~ 7 parts of foaming agent,
2 ~ 3 parts of blowing promotor,
5 ~ 10 parts of conditioning agent.
Silicon rubber expanded material according to the present invention, the reinforcing agent is in fume colloidal silica, precipitated silica
It is a kind of.
Silicon rubber expanded material according to the present invention, the fume colloidal silica is that the vapor phase method of silazane surface treatment is white
Carbon black.
The preparation method of silicon rubber expanded material according to the present invention, including rubber mixing, molding sulfur foam and rear place
Reason process, it is characterised in that：The molding sulfur foam process is two sections of molding sulfur foams；Die-filling foaming work is expired in one section of employing
Skill, 120 ~ 130 DEG C of conditions of vulcanization, 10 ~ 30 minutes, two sections adopt punch die foam process, 140 ~ 160 DEG C, 30 ~ 60 points of conditions of vulcanization
Clock.
The preparation method of silicon rubber expanded material according to the present invention, it is characterised in that：The post-treatment condition be 90 ~
120 DEG C, 2 ~ 6 hours.
Silicon rubber expanded material according to the present invention, designability is strong, uniform foam cell, smooth surface, accurate size, density
Little, high/low temperature rigidity is stable, compression set is little；Suitable for buffering, damping material, the system of large scale product is particularly well-suited to
It is standby.
Silicon rubber expanded material preparation method according to the present invention, process is simple is easy to operate, good stability, is suitable to batch
Production.
Specific embodiment
Technical scheme according to the present invention is further described with reference to specific embodiment, but not as to protecting
The restriction of shield scope.
Embodiment 1
110-2 vinylsiloxane rubber 500g, precipitated silica 100g are taken, is mediated 30 minutes in kneader, then in baking oven
190 DEG C are heat-treated 2 hours, take out and be cooled to room temperature；Using the above-mentioned elastomeric compound of mill back mixing and add benzoyl peroxide
1.0g, cumyl peroxide 5.0g, azodicarbonamide 25g and urea 12.5g, charging is thin logical 10 times after finishing, and parks 24
Hour.Using vulcanizing press molding sulfur foam shaping, one step cure foaming condition is：Die size 80 × 30mm of ф, plus
Material 160g, 124 DEG C of curing temperature, cure time 30 minutes；Post vulcanization foaming condition is：Die size 120 × 50mm of ф, sulphur
Change 140 DEG C of temperature, cure time 35 minutes；The heat treatment 6 hours of 90 DEG C of baking oven is shaped, and obtains expanded material.
The density of expanded material is 0.26g/cm3, load when compression strain is 15%, 38%, 50% be 150N, 485N,
875N, it is 11% that room temperature compresses the compression set rate of 40% × 48 hour.
Embodiment 2
110-2 vinylsiloxane rubber 500g, fume colloidal silica 300g are taken, is mediated 45 minutes in kneader, then in baking oven
198 DEG C are heat-treated 2 hours, take out and be cooled to room temperature；Using the above-mentioned elastomeric compound of mill back mixing and add 2,4- dichloro peroxides
Change benzoyl 2.5g, 2,5- dimethyl -2,5- di-t-butyl hexane peroxide 1.5g, azodicarbonamide 21g and urea 13g,
Charging is thin logical 10 times after finishing, 201 methyl-silicone oil 30g of addition, and charging is thin after finishing to lead to 10 times bottom sheet, parks 24 hours.Use
Vulcanizing press molding sulfur foam shaping, mould and feeding quantity with embodiment 1, one step cure foaming condition be 127 DEG C of temperature,
15 minutes time, post vulcanization foaming condition is 160 DEG C of temperature, 60 minutes time, and the heat treatment 5.5 hours of 95 DEG C of baking oven is shaped,
Obtain expanded material.
The density of the expanded material of embodiment 2 is 0.24g/cm3, load when compression strain is 15%, 38%, 50% be 90N,
306N, 580N, it is 11% that room temperature compresses the compression set rate of 40% × 48 hour.
Embodiment 3
110-1 vinylsiloxane rubber 500g, precipitated silica 225g are taken, is mediated 30 minutes in kneader, then in baking oven
200 DEG C are heat-treated 2.5 hours, take out and be cooled to room temperature；Using the above-mentioned elastomeric compound of mill back mixing and add benzoyl peroxide first
Acyl 1.7g, di-tert-butyl peroxide 2g, azodicarbonamide 10g and urea 17g, charging is thin logical 10 times after finishing, and adds 201
Methyl-silicone oil 40g, charging is thin after finishing to lead to 10 times bottom sheet, parks 24 hours.Using vulcanizing press molding sulfur foam shaping,
, with embodiment 1, one step cure foaming condition is 123 DEG C of temperature, 25 minutes time, post vulcanization foaming condition for mould and feeding quantity
For 148 DEG C of temperature, 40 minutes time, the sizing of heat treatment 5 hours of 100 DEG C of baking oven, expanded material is obtained.
The density of expanded material is 0.25g/cm3, load when compression strain is 15%, 38%, 50% be 95N, 355N,
634N, it is 13% that room temperature compresses the compression set rate of 40% × 48 hour.
Embodiment 4
110-1 vinylsiloxane rubber 500g, fume colloidal silica 125g are taken, is mediated 30 minutes in kneader, then in baking oven
195 DEG C are heat-treated 2.5 hours, take out and be cooled to room temperature；Using the above-mentioned elastomeric compound of mill back mixing and add peroxidating double right
Chlorobenzoyl 1.25g, cumyl peroxide 3.5g, azodicarbonamide 22.5g and urea 12.5g, charging is thin logical after finishing
10 times, 250-30 phenyl silicone oils 12.5g, charging is added to finish rear thin logical 10 times bottom sheet, park 24 hours.Using vulcanizing press
, with embodiment 1, one step cure foaming condition is 128 DEG C of temperature, 28 points of time for molding sulfur foam shaping, mould and feeding quantity
Clock, post vulcanization foaming condition is 143 DEG C of temperature, 40 minutes time, and the heat treatment 3.5 hours of 115 DEG C of baking oven is shaped, foamed
Material.
The density of expanded material is 0.26g/cm3, load when compression strain is 15%, 38%, 50% be 142N, 470N,
860N, it is 13% that room temperature compresses the compression set rate of 40% × 48 hour.
Embodiment 5
120-2 phenyl siloxane rubber 500g, fume colloidal silica 275g are taken, is mediated 50 minutes in kneader, then 201 in baking oven
DEG C heat treatment 2.5 hours, take out and be cooled to room temperature；Using the above-mentioned elastomeric compound of mill back mixing and add 2,4- dichloro peroxidating
Benzoyl 2.1g, 2,5- dimethyl -2,5- di-t-butyl hexane peroxide 1.9g, dinitrosopentamethlyene tetramine 22.5g and
Urea 15g, charging is thin logical 10 times after finishing, 210 methyl-silicone oil 33g of addition, and charging is thin after finishing to lead to 10 times bottom sheet, parks 24 little
When.It is molded using vulcanizing press molding sulfur foam, with embodiment 1, one step cure foaming condition is temperature for mould and feeding quantity
120 DEG C, 10 minutes time of degree, post vulcanization foaming condition is 152 DEG C of temperature, 55 minutes time, and 120 DEG C of heat treatments 2 of baking oven are little
When shape, obtain expanded material.
The density of expanded material is 0.25g/cm3, load when compression strain is 15%, 38%, 50% be 88N, 315N,
599N, it is 12% that room temperature compresses the compression set rate of 40% × 48 hour.
Embodiment 6
Take 120-2 phenyl siloxane rubber 500g, silazane and process fume colloidal silica 150g, kneading 40 minutes in kneader, so
Afterwards in baking oven 200 DEG C be heat-treated 1.5 hours, take out and be cooled to room temperature；Using the above-mentioned elastomeric compound of mill back mixing and add 2,
4- dichlorobenzoperoxide 2g, di-tert-butyl peroxide 2g, azodicarbonamide 35g and urea fat 10g, after charging is finished
It is thin logical 10 times, add 201 methyl-silicone oil 35g, charging to finish rear thin logical 10 times bottom sheet, park 24 hours.Using vulcanizing press
, with embodiment 1, one step cure foaming condition is 122 DEG C of temperature, 19 points of time for molding sulfur foam shaping, mould and feeding quantity
Clock, post vulcanization foaming condition is 153 DEG C of temperature, 45 minutes time, and the heat treatment 2.5 hours of 112 DEG C of baking oven is shaped, foamed
Material.
The density of expanded material is 0.25g/cm3, load when compression strain is 15%, 38%, 50% be 94N, 348N,
621N, it is 12% that room temperature compresses the compression set rate of 40% × 48 hour.
Embodiment 7
120-1 phenyl siloxane rubber 500g, fume colloidal silica 150g are taken, is mediated 35 minutes in kneader, then 200 in baking oven
DEG C heat treatment 2 hours, take out and be cooled to room temperature；Using the above-mentioned elastomeric compound of mill back mixing and add peroxidating double to chlorobenzene first
Acyl 1.4g, cumyl peroxide 3g, dinitrosopentamethlyene tetramine 12.5g and urea fat 17.5g, charging is thin logical after finishing
10 times, 250-30 phenyl silicone oils 25g, charging is added to finish rear thin logical 10 times bottom sheet, park 24 hours.Using vulcanizing press mould
Pressure sulfur foam shaping, with embodiment 1, one step cure foaming condition is 125 DEG C of temperature, 25 minutes time for mould and feeding quantity,
Post vulcanization foaming condition is 145 DEG C of temperature, 38 minutes time, and the heat treatment 4.5 hours of 105 DEG C of baking oven is shaped, and obtains foaming material
Material.
The density of expanded material is 0.26g/cm3, load when compression strain is 15%, 38%, 50% be 145N, 477N,
870N, it is 11% that room temperature compresses the compression set rate of 40% × 48 hour.
Embodiment 8
Take 120-1 phenyl siloxane rubber 500g, silazane and process fume colloidal silica 250g, kneading 37 minutes in kneader, so
Afterwards in baking oven 200 DEG C be heat-treated 2 hours, take out and be cooled to room temperature；Using the above-mentioned elastomeric compound of mill back mixing and add peroxide
Change benzoyl 1.3g, cumyl peroxide 3.7g, dinitrosopentamethlyene tetramine 20g and urea fat 20g, after charging is finished
It is thin logical 10 times, add 250-30 phenyl silicone oils 37.5g, charging to finish rear thin logical 10 times bottom sheet, park 24 hours.Using flat board sulphur
, with embodiment 1, one step cure foaming condition is 122 DEG C of temperature, time 28 for the molding sulfur foam shaping of change machine, mould and feeding quantity
Minute, post vulcanization foaming condition is 158 DEG C of temperature, 50 minutes time, and the heat treatment 3 hours of 111 DEG C of baking oven is shaped, foamed
Material.
The density of expanded material is 0.24g/cm3, load when compression strain is 15%, 38%, 50% be 85N, 320N,
603N, it is 11% that room temperature compresses the compression set rate of 40% × 48 hour.
Embodiment 9
Take 120-1 phenyl siloxane rubber 500g, silazane and process fume colloidal silica 175g, kneading 30 minutes in kneader, so
Afterwards in baking oven 200 DEG C be heat-treated 2 hours, take out and be cooled to room temperature；Using the above-mentioned elastomeric compound of mill back mixing and add peroxide
Change benzoyl 1.5g, cumyl peroxide 2.5g, dinitrosopentamethlyene tetramine 15g and urea fat 15g, after charging is finished
It is thin logical 10 times, add 250-30 phenyl silicone oils 50g, charging to finish rear thin logical 10 times bottom sheet, park 24 hours.Using compression molding
, with embodiment 1, one step cure foaming condition is 130 DEG C of temperature, 20 points of time for machine molding sulfur foam shaping, mould and feeding quantity
Clock；Post vulcanization foaming condition is 150 DEG C of temperature, 30 minutes time, and the heat treatment 4 hours of 100 DEG C of baking oven is shaped, and obtains foaming material
Material.
The density of expanded material is 0.25g/cm3, load when compression strain is 15%, 38%, 50% be 100N, 368N,
636N, it is 13% that room temperature compresses the compression set rate of 40% × 48 hour.
Claims (8)
1. a kind of silicon rubber expanded material, is prepared using two sections of molding sulfur foam techniques, and the quality composition of material at least includes：
100 parts of silicon rubber,
20 ~ 60 parts of reinforcing agent,
0.2 ~ 0.5 part of vulcanizing agent A,
0.3 ~ 1.0 part of vulcanizing agent B,
2 ~ 7 parts of foaming agent,
2 ~ 4 parts of blowing promotor,
0 ~ 10 part of conditioning agent；
The silicon rubber is the one kind in vinylsiloxane rubber, phenyl siloxane rubber；Vulcanizing agent A is benzoyl peroxide, peroxidating
Double one kind in chlorobenzoyl, 2,4- dichlorobenzoperoxides；Vulcanizing agent B is cumyl peroxide, the uncle of peroxidating two
One kind in butyl, 2,5- dimethyl -2,5- di-t-butyl hexane peroxides；The foaming agent is azodicarbonamide, two sub-
One kind in the methine tetramine of nitro five；Blowing promotor is the one kind in urea, urea fat；Conditioning agent is methyl-silicone oil, phenyl
One kind in silicone oil.
2. silicon rubber expanded material according to claim 1, the quality composition of material at least includes：Optimization component
100 parts of silicon rubber,
25 ~ 45 parts of reinforcing agent,
0.25 ~ 0.4 part of vulcanizing agent A,
0.4 ~ 0.7 part of vulcanizing agent B,
2.5 ~ 4.5 parts of foaming agent,
2.5 ~ 3.5 parts of blowing promotor,
2.5 ~ 10 parts of conditioning agent.
3. silicon rubber expanded material according to claim 1, the quality composition of material at least includes：
100 parts of silicon rubber,
25 ~ 50 parts of reinforcing agent,
0.2 ~ 0.3 part of vulcanizing agent A,
0.5 ~ 1.0 part of vulcanizing agent B,
2 ~ 4 parts of foaming agent,
3 ~ 4 parts of blowing promotor,
0 ~ 10 part of conditioning agent.
4. silicon rubber expanded material according to claim 1, the quality composition of material at least includes：
100 parts of silicon rubber,
30 ~ 60 parts of reinforcing agent,
0.3 ~ 0.5 part of vulcanizing agent A,
0.3 ~ 0.5 part of vulcanizing agent B,
3 ~ 7 parts of foaming agent,
2 ~ 3 parts of blowing promotor,
5 ~ 10 parts of conditioning agent.
5. the silicon rubber expanded material according to Claims 1 to 4 any one, the reinforcing agent be fume colloidal silica,
One kind in precipitated silica.
6. the silicon rubber expanded material according to Claims 1 to 4 any one, the fume colloidal silica is silazane table
The fume colloidal silica that face is processed.
7. according to the preparation method of the arbitrarily described silicon rubber expanded material of Claims 1 to 4, including rubber mixing, molding sulphur
Change foaming and last handling process, it is characterised in that：The molding sulfur foam process is two sections of molding sulfur foams；One section of employing
Full die-filling foam process, 120 ~ 130 DEG C of conditions of vulcanization, 10 ~ 30 minutes, two sections adopt punch die foam process, conditions of vulcanization 140 ~
160 DEG C, 30 ~ 60 minutes.
8. the preparation method of silicon rubber expanded material according to claim 8, it is characterised in that：The post-treatment condition is
90 ~ 120 DEG C, 2 ~ 6 hours.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610973317.2A CN106566259A (en) | 2016-11-07 | 2016-11-07 | Silicone rubber foaming material and preparation method thereof |
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| CN201610973317.2A CN106566259A (en) | 2016-11-07 | 2016-11-07 | Silicone rubber foaming material and preparation method thereof |
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| CN109722034A (en) * | 2018-12-12 | 2019-05-07 | 广东聚合科技股份有限公司 | A kind of antistatic silicone rubber foamed material and preparation method thereof |
| CN109810510A (en) * | 2018-12-29 | 2019-05-28 | 易宝（福建）高分子材料股份公司 | A kind of damping silicon rubber closed pore molding second time of foaming material and preparation method thereof |
| CN110452542A (en) * | 2019-08-24 | 2019-11-15 | 黄凤林 | A kind of formula of silica gel foamed products |
| CN111073292A (en) * | 2019-12-27 | 2020-04-28 | 深圳市富程威科技有限公司 | Heat-conducting foaming silicon rubber and preparation method and application thereof |
| CN111218117A (en) * | 2020-03-02 | 2020-06-02 | 广东安必成精密科技有限公司 | Elastic foam material, preparation method thereof and automobile skylight sunshade curtain rail limiting strip |
| CN112277349A (en) * | 2020-10-28 | 2021-01-29 | 马鞍山联洪合成材料有限公司 | Processing technology of foaming type reinforcing rubber sheet for automobile |
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| CN111073292A (en) * | 2019-12-27 | 2020-04-28 | 深圳市富程威科技有限公司 | Heat-conducting foaming silicon rubber and preparation method and application thereof |
| CN111218117A (en) * | 2020-03-02 | 2020-06-02 | 广东安必成精密科技有限公司 | Elastic foam material, preparation method thereof and automobile skylight sunshade curtain rail limiting strip |
| CN112277349A (en) * | 2020-10-28 | 2021-01-29 | 马鞍山联洪合成材料有限公司 | Processing technology of foaming type reinforcing rubber sheet for automobile |
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