CN109266016A - A kind of key insulation silica gel and preparation method thereof - Google Patents
A kind of key insulation silica gel and preparation method thereof Download PDFInfo
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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
- 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
- C08K3/02—Elements
- C08K3/04—Carbon
- C08K3/042—Graphene or derivatives, e.g. graphene oxides
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
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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
- C08K9/00—Use of pretreated ingredients
- C08K9/04—Ingredients treated with organic substances
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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
- 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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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/267—Magnesium carbonate
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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
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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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 silica gel technical field, a kind of key insulation silica gel and preparation method thereof is specifically disclosed.The key insulation silica gel is prepared by the raw material of following parts by weight: 100 parts of silicon rubber, 10-20 parts of Dopamine improved silica, 10-20 parts of gas-phase silica, 5-10 parts of nanofiller, 3-5 parts of graphene oxide, 0.5-1.5 parts of fatty acid metal salts, 2-10 parts of vulcanizing agent, 0.5-1 parts of defrosting compound；Wherein, Dopamine improved silica is to be prepared by silica, Dopamine, silicon fluoride coupling agent according to mass ratio 1:0.5-0.8:0.3-1.The key of electronic product is prepared using key silica gel of the invention, cost is relatively low, and has excellent performance, and has good market prospects.
Description
Technical field
The present invention relates to silica gel technical fields, and in particular to a kind of key insulation silica gel and preparation method thereof.
Background technique
With the fast development of Information technology, the electronics such as computer, mobile phone, personal digital assistant and digital camera dress
Set the tool indispensable in people's daily life that has become, and communication circle of the key between user and the electronic device
Face, as use demand of the people to electronic device is increasingly popularized, different keys is also fast-developing therewith.
Currently, the substrate of the key of electronic product has several materials such as ABS engineering plastics, polycarbonate, magnesium alloy, silica gel
Matter, wherein silica gel substrate has obtained the favor of most manufacturers, on electronic product with its good feel and cheap cost
It is widely used.With the continuous development of the key of high end equipment, the requirement for material is also higher and higher, therefore develops a kind of tool
Having the key silica gel of superperformance has very wide market.
Summary of the invention
The purpose of the present invention is to provide a kind of key insulation silica gel of good performance and preparation method thereof.
To achieve the goals above, the invention adopts the following technical scheme:
A kind of key insulation silica gel, is prepared by the raw material of following parts by weight:
100 parts of silicon rubber；
10-20 parts of Dopamine improved silica；
10-20 parts of gas-phase silica；
5-10 parts of nanofiller；
3-5 parts of graphene oxide；
0.5-1.5 parts of fatty acid metal salts；
2-10 parts of vulcanizing agent；
0.5-1 parts of defrosting compound.
The Dopamine improved silica is prepared by following methods: by silica, Dopamine, fluorine
Silane coupling agent is mixed according to mass ratio 1:0.5-0.8:0.3-1, obtains modified feedstock, and it is molten that alkaline buffer is added in modified feedstock
It in liquid, filters, washs after reacting 2-3 hours at room temperature, it is dry, obtain Dopamine improved silica.
In the preparation process of Dopamine improved silica, the pH of the alkaline buffer solution is 8.0-9.0, described
The mass ratio of modified feedstock and alkaline buffer solution is 1:100-200.
The silicon rubber is one or both of methyl vinyl silicone rubber, methyl phenyl vinyl silicone rubber.
The nanofiller is one of nano aluminium oxide, nano zine oxide or nano montmorillonite or more than one is mixed
Close object.
The fatty acid metal salts are magnesium stearate, calcium stearate or aluminum stearate.
The vulcanizing agent is dibenzoyl peroxide or cumyl peroxide.
The defrosting compound is magnesium carbonate.
The present invention also provides the preparation methods of key insulation silica gel: by silicon rubber, Dopamine modified two
Silica, gas-phase silica, nanofiller, graphene oxide, fatty acid metal salts and defrosting compound stir at 100-180 DEG C
It is even, it discharges after then heating 15-20 min under vacuum conditions, vulcanizing agent is added after being cooled to room temperature and is kneaded uniformly, discharging obtains
To key insulation silica gel.
The invention adopts the above technical scheme, is filled out with silicon rubber, Dopamine improved silica, gas-phase silica, nanometer
Material, graphene oxide, fatty acid metal salts, vulcanizing agent and defrosting compound are that raw material prepares key insulation silica gel, are had beneficial below
Effect: 1, through Dopamine modified silica due to introducing Dopamine silica surface hydroxyl is reduced
Active force between base changes the surface texture of silica, so that silica and the mixing of other raw materials are more uniform；This
Outside, when introducing silicon fluoride coupling agent, then silica gel will be used to prepare by the modified silica of Dopamine, Ke Yijin
One step improves improved silica and other intermiscibilities with raw material, and binding force is more preferable, to improve the performance of product；2, product
Middle addition gas-phase silica, is dispersed in silica gel, can not only reduce the additive amount of silicon rubber indirectly, can also improve product
The performances such as intensity, wearability and ageing resistance；3, filler network can be improved to matrix silicon rubber in addition graphene oxide
Reinforcing effect；4, defrosting compound is added, it is possible to reduce product generated small-molecule substance when vulcanizing.Using key silicon of the invention
Glue prepares the key of electronic product, and cost is relatively low, and has excellent heat resistance, cold resistance, environment resistant, electric insulation
Property, fatigue durability the features such as, have good market prospects.
Specific embodiment
A kind of key insulation silica gel, is prepared by the raw material of following parts by weight:
100 parts of silicon rubber；
10-20 parts of Dopamine improved silica；
10-20 parts of gas-phase silica；
5-10 parts of nanofiller；
3-5 parts of graphene oxide；
0.5-1.5 parts of fatty acid metal salts；
2-10 parts of vulcanizing agent；
0.5-1 parts of defrosting compound；
Wherein, Dopamine improved silica is prepared by following methods: by silica, Dopamine, fluorine silicon
Alkane coupling agent is mixed according to mass ratio 1:0.5-0.8:0.3-1, obtains modified feedstock, is that 1:100-200 will change according to mass ratio
Property raw material be added pH be 8.0-9.0 alkaline buffer solution in, at room temperature react 2-3 hour after filter, wash, drying, obtain
Dopamine improved silica.
Silicon rubber is one or both of methyl vinyl silicone rubber, methyl phenyl vinyl silicone rubber.Nanofiller
For one of nano aluminium oxide, nano zine oxide or nano montmorillonite or more than one mixture.Fatty acid metal salts are
Magnesium stearate, calcium stearate or aluminum stearate.Vulcanizing agent is dibenzoyl peroxide or cumyl peroxide.Defrosting compound is carbon
Sour magnesium.
The preparation method of above-mentioned key insulation silica gel: by silicon rubber, Dopamine improved silica, gas phase hard charcoal
Black, nanofiller, graphene oxide, fatty acid metal salts and defrosting compound stir evenly at 100-180 DEG C, then in vacuum item
It discharges after heating 15-20 min under part, vulcanizing agent is added after being cooled to room temperature and is kneaded uniformly discharging, obtain the key insulation
Silica gel.
Below by specific embodiment, invention is further described in detail, but protection scope of the present invention be not limited to it is described
Content.
Embodiment 1
A kind of preparation method of key insulation silica gel:
(1) Dopamine improved silica is prepared: by silica, Dopamine, silicon fluoride coupling agent according to quality
It is mixed than 1:0.5:0.0.5, obtains modified feedstock, being 1:150 according to mass ratio delays the modified feedstock addition pH alkalinity for being 8.5
It rushes in solution, is filtered after reacting 2.5 hours at room temperature, washed, it is dry, obtain Dopamine improved silica.
(2) by weight, prepare following raw material:
Silicon rubber: 100 parts of methyl vinyl silicone rubber；
Dopamine improved silica: 15 parts；
Gas-phase silica: 15 parts；
Nanofiller: 7 parts of nano aluminium oxide；
Graphene oxide: 4 parts；
Fatty acid metal salts: 1 part of magnesium stearate；
Vulcanizing agent: 5 parts of dibenzoyl peroxide；
Defrosting compound: 0.75 part of magnesium carbonate；
(3) prepare key insulation silica gel: by silicon rubber, Dopamine improved silica, gas-phase silica, nanofiller,
Graphene oxide, fatty acid metal salts and defrosting compound stir evenly at 145 DEG C, after then heating 15min under vacuum conditions
Discharging is added vulcanizing agent and is kneaded uniformly discharging after being cooled to room temperature, obtain the key insulation silica gel.
Embodiment 2
A kind of preparation method of key insulation silica gel:
(1) Dopamine improved silica is prepared: by silica, Dopamine, silicon fluoride coupling agent according to quality
It is mixed than 1:0.8:1, obtains modified feedstock, be the alkaline buffer that modified feedstock addition pH is 8.0 by 1:100 according to mass ratio
It in solution, filters, washs after reacting 2 hours at room temperature, it is dry, obtain Dopamine improved silica.
(2) by weight, prepare following raw material:
Silicon rubber: 100 parts of methyl phenyl vinyl silicone rubber；
Dopamine improved silica: 10 parts；
Gas-phase silica: 10 parts；
Nanofiller: 5 parts of nano zine oxide；
Graphene oxide: 3 parts；
Fatty acid metal salts: 0.5 part of calcium stearate；
Vulcanizing agent: 2 parts of cumyl peroxide；
Defrosting compound: 0.5 part of magnesium carbonate；
(3) prepare key insulation silica gel: by silicon rubber, Dopamine improved silica, gas-phase silica, nanofiller,
Graphene oxide, fatty acid metal salts and defrosting compound stir evenly at 100 DEG C, after then heating 20 min under vacuum conditions
Discharging is added vulcanizing agent and is kneaded uniformly discharging after being cooled to room temperature, obtain the key insulation silica gel.
Embodiment 3
A kind of preparation method of key insulation silica gel:
(1) Dopamine improved silica is prepared: by silica, Dopamine, silicon fluoride coupling agent according to quality
It is mixed than 1:0.65:0.3, obtains modified feedstock, being 1:200 according to mass ratio delays the modified feedstock addition pH alkalinity for being 9.0
It rushes in solution, is filtered after reacting for 3 hours at room temperature, wash, it is dry, obtain Dopamine improved silica.
(2) by weight, prepare following raw material:
Silicon rubber: 50 parts of methyl vinyl silicone rubber, 50 parts of methyl phenyl vinyl silicone rubber；
Dopamine improved silica: 20 parts；
Gas-phase silica: 20 parts；
Nanofiller: 10 parts of nano montmorillonite；
Graphene oxide: 5 parts；
Fatty acid metal salts: 1.5 parts of aluminum stearate；
Vulcanizing agent: 10 parts of dibenzoyl peroxide；
Defrosting compound: 1 part of magnesium carbonate；
(3) prepare key insulation silica gel: by silicon rubber, Dopamine improved silica, gas-phase silica, nanofiller,
Graphene oxide, fatty acid metal salts and defrosting compound stir evenly at 180 DEG C, after then heating 15 min under vacuum conditions
Discharging is added vulcanizing agent and is kneaded uniformly discharging after being cooled to room temperature, obtain the key insulation silica gel.
Embodiment 4
A kind of preparation method of key insulation silica gel:
(1) Dopamine improved silica is prepared: by silica, Dopamine, silicon fluoride coupling agent according to quality
It is mixed than 1:0.7:0.8, obtains modified feedstock, be the alkaline buffer that modified feedstock addition pH is 8.5 by 1:160 according to mass ratio
It in solution, filters, washs after reacting 2.5 hours at room temperature, it is dry, obtain Dopamine improved silica.
(2) by weight, prepare following raw material
Silicon rubber: 70 parts of methyl vinyl silicone rubber, 30 parts of methyl phenyl vinyl silicone rubber；
Dopamine improved silica: 18 parts；
12 parts of gas-phase silica；
Nanofiller: 3 parts of nano aluminium oxide, 5 parts of nano montmorillonite；
4.5 parts of graphene oxide；
Fatty acid metal salts: 0.75 part of magnesium stearate；
Vulcanizing agent: 6 parts of cumyl peroxide；
Defrosting compound: 0.72 part of magnesium carbonate；
(3) prepare key insulation silica gel: by silicon rubber, Dopamine improved silica, gas-phase silica, nanofiller,
Graphene oxide, fatty acid metal salts and defrosting compound stir evenly at 160 DEG C, after then heating 15 min under vacuum conditions
Discharging is added vulcanizing agent and is kneaded uniformly discharging after being cooled to room temperature, obtain the key insulation silica gel.
Claims (9)
- The silica gel 1. a kind of key insulate, it is characterised in that: it is prepared by the raw material of following parts by weight:100 parts of silicon rubber；10-20 parts of Dopamine improved silica；10-20 parts of gas-phase silica；5-10 parts of nanofiller；3-5 parts of graphene oxide；0.5-1.5 parts of fatty acid metal salts；2-10 parts of vulcanizing agent；0.5-1 parts of defrosting compound.
- The silica gel 2. a kind of key according to claim 1 insulate, it is characterised in that: the modified titanium dioxide of the Dopamine Silicon is prepared by following methods: by silica, Dopamine, silicon fluoride coupling agent according to mass ratio 1:0.5-0.8: 0.3-1 mixing, obtains modified feedstock, and modified feedstock is added in alkaline buffer solution, filters after reacting 2-3 hours at room temperature, Washing, it is dry, obtain Dopamine improved silica.
- The silica gel 3. a kind of key according to claim 2 insulate, it is characterised in that: the pH of the alkaline buffer solution is The mass ratio of 8.0-9.0, the modified feedstock and alkaline buffer solution is 1:100-200.
- The silica gel 4. a kind of key according to claim 1 insulate, it is characterised in that: the silicon rubber is methyl ethylene silicon One or both of rubber, methyl phenyl vinyl silicone rubber.
- The silica gel 5. a kind of key according to claim 1 insulate, it is characterised in that: the nanofiller is nano oxidized One of aluminium, nano zine oxide or nano montmorillonite or more than one mixture.
- The silica gel 6. a kind of key according to claim 1 insulate, it is characterised in that: the fatty acid metal salts are stearic acid Magnesium, calcium stearate or aluminum stearate.
- The silica gel 7. a kind of key according to claim 1 insulate, it is characterised in that: the vulcanizing agent is diphenyl peroxide first Acyl or cumyl peroxide.
- The silica gel 8. a kind of key according to claim 1 insulate, it is characterised in that: the defrosting compound is magnesium carbonate.
- 9. the preparation method of key insulation silica gel a method as claimed in any one of claims 1-8, it is characterised in that: by silicon rubber, catechu Alcopar improved silica, gas-phase silica, nanofiller, graphene oxide, fatty acid metal salts and defrosting compound are in 100- It stirs evenly at 180 DEG C, discharges after then heating 15-20 min under vacuum conditions, it is mixed that vulcanizing agent is added after being cooled to room temperature Uniformly, discharging obtains the key insulation silica gel for refining.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110218367A (en) * | 2019-05-30 | 2019-09-10 | 刘光植 | A kind of preparation method of the wear-resisting tread rubber of anticracking |
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