CN111019360A - Novel addition type silicone rubber and preparation method thereof - Google Patents
Novel addition type silicone rubber and preparation method thereof Download PDFInfo
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- CN111019360A CN111019360A CN201911414869.XA CN201911414869A CN111019360A CN 111019360 A CN111019360 A CN 111019360A CN 201911414869 A CN201911414869 A CN 201911414869A CN 111019360 A CN111019360 A CN 111019360A
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- silicone oil
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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
- 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
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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
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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Abstract
The invention discloses novel addition silicone rubber which comprises 65 mass percent of silicone oil mixture consisting of vinyl-terminated silicone oil, hydrogen-terminated silicone oil and lateral hydrogen-containing silicone oil, 5 mass percent of inhibitor, 10 mass percent of heat-conducting filler, 10 mass percent of flame-retardant filler and 10 mass percent of vulcanizing agent. The invention adopts the hydrogen-terminated silicone oil and the short-chain vinyl-terminated silicone oil (low viscosity) to carry out chain extension reaction, thereby not only achieving the effect of directly using high-viscosity (long-chain) silicone oil, but also meeting the requirement of low viscosity before curing, and controlling the crosslinking density of the formed colloid by controlling the concentrations of the hydrogen-terminated and side hydrogen-terminated silicone oils and the content of active hydrogen.
Description
Technical Field
The invention relates to the technical field of silica gel processes, in particular to novel addition type silicone rubber and a preparation method thereof.
Background
The existing additive liquid silicone rubber controls the viscosity of the terminal vinyl silicone oil and the hydrogen content and the specific dosage of the hydrogen-containing silicone oil to control the crosslinking density, the mechanical property of a crosslinked product is in direct proportion to the viscosity of the terminal vinyl silicone oil, the use of the high-viscosity silicone oil can limit the filling of functional fillers (heat conduction, electric conduction and the like), and the hardness is sensitive to the influence degree of the filling fillers.
Disclosure of Invention
The present invention aims to overcome the above-mentioned shortcomings and provide a technical solution to solve the above-mentioned problems.
The novel addition type silicone rubber comprises 65% of a silicone oil mixture consisting of vinyl-terminated silicone oil, hydrogen-terminated silicone oil and lateral hydrogen-containing silicone oil, 5% of an inhibitor, 10% of a heat-conducting filler, 10% of a flame-retardant filler and 10% of a vulcanizing agent in percentage by mass.
Furthermore, the molecular number ratio of hydrogen radicals to vinyl radicals in the silicone oil mixture is 1-1.2.
Furthermore, the hydrogen content of the terminal hydrogen-containing silicone oil is 0.4%, the hydrogen content of the side hydrogen-containing silicone oil is 0.18%, and the molecular number ratio of the terminal hydrogen groups to the side hydrogen groups in the silicone oil mixture is 0.4-8.
Furthermore, the viscosity of the vinyl-terminated silicone oil is between 200 and 350 cps.
The preparation method of the novel addition type silicone rubber is applied to the novel addition type silicone rubber and is characterized by comprising the following steps:
(1) designing and producing a silicon rubber mold;
(2) taking 65% of silicone oil mixture, 5% of inhibitor, 10% of heat-conducting filler, 10% of flame-retardant filler and 10% of vulcanizing agent according to mass percentage, and stirring in vacuum until the viscosity is 1000-5000 cps to obtain low-viscosity rubber material;
(3) and (3) adding the low-viscosity rubber material obtained in the step (2) into the silicone rubber mold obtained in the step (1) for heating and curing to obtain a finished product.
Further, the silicone oil mixture in the step (2) is prepared by the following steps:
(1) taking a proper amount of hydrogen-containing silicone oil;
(2) adding side hydrogen-containing silicone oil into the end hydrogen-containing silicone oil obtained in the step (1), so that the molecular number ratio of the end hydrogen base to the side hydrogen base is 0.4-8, and obtaining a hydrogen-containing silicone oil mixture;
(3) adding end vinyl silicone oil into the hydrogen-containing silicone oil mixture obtained in the step (2), and enabling the molecular number ratio of hydrogen radicals to vinyl radicals to be 1-1.2 to obtain the silicone oil mixture.
Compared with the prior art, the invention has the following beneficial effects: the invention adopts the hydrogen-terminated silicone oil and the short-chain vinyl-terminated silicone oil (low viscosity) to carry out chain extension reaction, thereby not only achieving the effect of directly using high-viscosity (long-chain) silicone oil, but also meeting the requirement of low viscosity before curing, and controlling the crosslinking density of the formed colloid by controlling the concentrations of the hydrogen-terminated and side hydrogen-terminated silicone oils and the content of active hydrogen.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The novel addition type silicone rubber comprises 65% of a silicone oil mixture consisting of vinyl-terminated silicone oil, hydrogen-terminated silicone oil and lateral hydrogen-containing silicone oil, 5% of an inhibitor, 10% of a heat-conducting filler, 10% of a flame-retardant filler and 10% of a vulcanizing agent in percentage by mass.
Furthermore, the molecular number ratio of hydrogen radicals to vinyl radicals in the silicone oil mixture is 1-1.2.
Furthermore, the hydrogen content of the terminal hydrogen-containing silicone oil is 0.4%, the hydrogen content of the side hydrogen-containing silicone oil is 0.18%, and the molecular number ratio of the terminal hydrogen groups to the side hydrogen groups in the silicone oil mixture is 0.4-8.
Furthermore, the viscosity of the vinyl-terminated silicone oil is between 200 and 350 cps.
The preparation method of the novel addition type silicone rubber is applied to the novel addition type silicone rubber and is characterized by comprising the following steps:
(1) designing and producing a silicon rubber mold;
(2) taking 65% of silicone oil mixture, 5% of inhibitor, 10% of heat-conducting filler, 10% of flame-retardant filler and 10% of vulcanizing agent according to mass percentage, and carrying out vacuum stirring until the viscosity is 1000-5000 cps to obtain low-viscosity rubber material, wherein the low-viscosity rubber material can be filled with more fillers and has high operability;
(3) and (3) adding the low-viscosity rubber material obtained in the step (2) into the silicone rubber mold obtained in the step (1) for heating and curing to obtain a finished product.
Further, the silicone oil mixture in the step (2) is prepared by the following steps:
(1) taking a proper amount of hydrogen-containing silicone oil;
(2) adding side hydrogen-containing silicone oil into the end hydrogen-containing silicone oil obtained in the step (1), so that the ratio of the number of molecules of the end hydrogen groups to the number of molecules of the side hydrogen groups is 0.4-8, obtaining a hydrogen-containing silicone oil mixture, controlling the reaction rate of the end hydrogen and the side hydrogen, forming a more reasonable cross-linked network structure, and further controlling the hardness of a final finished product;
(3) adding end vinyl silicone oil into the hydrogen-containing silicone oil mixture in the step (2), and enabling the molecular number ratio of hydrogen radicals to vinyl radicals to be 1-1.2 to obtain the silicone oil mixture, so as to ensure that the vinyl radicals can completely react.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Claims (6)
1. The novel addition silicone rubber is characterized by comprising 65 mass percent of silicone oil mixture consisting of vinyl-terminated silicone oil, hydrogen-terminated silicone oil and lateral hydrogen-containing silicone oil, 5 mass percent of inhibitor, 10 mass percent of heat-conducting filler, 10 mass percent of flame-retardant filler and 10 mass percent of vulcanizing agent.
2. A novel addition silicone rubber according to claim 1, wherein the molecular number ratio of hydrogen groups to vinyl groups in the silicone oil mixture is 1 to 1.2.
3. The novel addition silicone rubber according to claim 1, wherein the hydrogen content of the terminal hydrogen-containing silicone oil is 0.4%, the hydrogen content of the side hydrogen-containing silicone oil is 0.18%, and the ratio of the number of molecules of terminal hydrogen groups to the number of molecules of side hydrogen groups in the silicone oil mixture is 0.4-8.
4. The novel addition silicone rubber according to claim 1, wherein the viscosity of the terminal vinyl silicone oil is 200 to 350 cps.
5. A method for preparing a novel addition type silicone rubber, which is applied to the novel addition type silicone rubber of claim 1, and is characterized by comprising the following steps:
(1) designing and producing a silicon rubber mold;
(2) taking 65% of silicone oil mixture, 5% of inhibitor, 10% of heat-conducting filler, 10% of flame-retardant filler and 10% of vulcanizing agent according to mass percentage, and stirring in vacuum until the viscosity is 1000-5000 cps to obtain low-viscosity rubber material;
(3) and (3) adding the low-viscosity rubber material obtained in the step (2) into the silicone rubber mold obtained in the step (1) for heating and curing to obtain a finished product.
6. The method for preparing a novel addition silicone rubber according to claim 4, wherein the silicone oil mixture in step (2) is prepared by the steps of:
(1) taking a proper amount of hydrogen-containing silicone oil;
(2) adding side hydrogen-containing silicone oil into the end hydrogen-containing silicone oil obtained in the step (1), so that the molecular number ratio of the end hydrogen base to the side hydrogen base is 0.4-8, and obtaining a hydrogen-containing silicone oil mixture;
(3) adding end vinyl silicone oil into the hydrogen-containing silicone oil mixture obtained in the step (2), and enabling the molecular number ratio of hydrogen radicals to vinyl radicals to be 1-1.2 to obtain the silicone oil mixture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911414869.XA CN111019360A (en) | 2019-12-31 | 2019-12-31 | Novel addition type silicone rubber and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911414869.XA CN111019360A (en) | 2019-12-31 | 2019-12-31 | Novel addition type silicone rubber and preparation method thereof |
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| CN111019360A true CN111019360A (en) | 2020-04-17 |
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| CN201911414869.XA Withdrawn CN111019360A (en) | 2019-12-31 | 2019-12-31 | Novel addition type silicone rubber and preparation method thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103709988A (en) * | 2013-12-26 | 2014-04-09 | 浙江新安化工集团股份有限公司 | Silica gel for electronic components and preparation method thereof |
| CN109438995A (en) * | 2018-12-21 | 2019-03-08 | 广州市白云化工实业有限公司 | The high-intensitive add-on type Silica hydrogel and preparation method thereof of hypotonic oil |
| US20190322809A1 (en) * | 2016-12-29 | 2019-10-24 | Byd Company Limited | Liquid optical silicone composition, optical silicone, double-glass photovoltaic assembly, and preparation method therefor |
-
2019
- 2019-12-31 CN CN201911414869.XA patent/CN111019360A/en not_active Withdrawn
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103709988A (en) * | 2013-12-26 | 2014-04-09 | 浙江新安化工集团股份有限公司 | Silica gel for electronic components and preparation method thereof |
| US20190322809A1 (en) * | 2016-12-29 | 2019-10-24 | Byd Company Limited | Liquid optical silicone composition, optical silicone, double-glass photovoltaic assembly, and preparation method therefor |
| CN109438995A (en) * | 2018-12-21 | 2019-03-08 | 广州市白云化工实业有限公司 | The high-intensitive add-on type Silica hydrogel and preparation method thereof of hypotonic oil |
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Application publication date: 20200417 |
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