CN114437550A - Single-component addition type liquid silicone rubber - Google Patents
Single-component addition type liquid silicone rubber Download PDFInfo
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- CN114437550A CN114437550A CN202210093143.6A CN202210093143A CN114437550A CN 114437550 A CN114437550 A CN 114437550A CN 202210093143 A CN202210093143 A CN 202210093143A CN 114437550 A CN114437550 A CN 114437550A
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- Prior art keywords
- parts
- silicone rubber
- type liquid
- liquid silicone
- viscosity
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- 229920002379 silicone rubber Polymers 0.000 title claims abstract description 30
- 239000004944 Liquid Silicone Rubber Substances 0.000 title claims abstract description 27
- 229920002545 silicone oil Polymers 0.000 claims abstract description 27
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims abstract description 18
- 229920002554 vinyl polymer Polymers 0.000 claims abstract description 18
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 17
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 17
- 239000001257 hydrogen Substances 0.000 claims abstract description 17
- 150000002978 peroxides Chemical class 0.000 claims abstract description 14
- 239000000945 filler Substances 0.000 claims abstract description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 5
- HVLLSGMXQDNUAL-UHFFFAOYSA-N triphenyl phosphite Chemical group C=1C=CC=CC=1OP(OC=1C=CC=CC=1)OC1=CC=CC=C1 HVLLSGMXQDNUAL-UHFFFAOYSA-N 0.000 claims description 14
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 4
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052582 BN Inorganic materials 0.000 claims description 3
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims description 3
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 claims description 3
- 150000002432 hydroperoxides Chemical class 0.000 claims description 2
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims 1
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 abstract description 14
- 150000008301 phosphite esters Chemical class 0.000 abstract description 11
- 239000003054 catalyst Substances 0.000 abstract description 8
- 239000000463 material Substances 0.000 abstract description 8
- 239000003112 inhibitor Substances 0.000 abstract description 7
- 229910052697 platinum Inorganic materials 0.000 abstract description 7
- 230000002401 inhibitory effect Effects 0.000 abstract description 6
- 230000003197 catalytic effect Effects 0.000 abstract description 3
- 238000004513 sizing Methods 0.000 abstract description 2
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 abstract 2
- 239000002253 acid Substances 0.000 abstract 1
- 238000000354 decomposition reaction Methods 0.000 abstract 1
- 229910021485 fumed silica Inorganic materials 0.000 abstract 1
- 230000001590 oxidative effect Effects 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 229920001971 elastomer Polymers 0.000 description 3
- 230000005764 inhibitory process Effects 0.000 description 3
- AQSJGOWTSHOLKH-UHFFFAOYSA-N phosphite(3-) Chemical class [O-]P([O-])[O-] AQSJGOWTSHOLKH-UHFFFAOYSA-N 0.000 description 2
- 239000004945 silicone rubber Substances 0.000 description 2
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical group [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- -1 acetylene alcohol Chemical compound 0.000 description 1
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 description 1
- 150000001412 amines Chemical class 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Classifications
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a single-component addition type liquid silicone rubber which comprises the following components in parts by weight: 25-55 parts of low-viscosity vinyl silicone oil, 15-35 parts of high-viscosity vinyl silicone oil, 15-45 parts of fumed silica, 3-6 parts of silazane, 0-500 parts of filler, 1.5-2 parts of water, 2-10 parts of hydrogen-containing silicone oil, 0.2-0.5 part of isopropanol solution containing 0.5% chloroplatinic acid, 0.002-0.005 part of phosphite ester and 0.01-1 part of peroxide. Through adopting phosphite ester and peroxide composition inhibitor system that has high-efficient inhibitory effect, low volatility, the phosphite ester plays fine inhibitory action to platinum catalyst during low temperature, and peroxide heated decomposition and oxidizing phosphite ester after the temperature rose makes it lose inhibitory effect, makes platinum catalyst resume catalytic ability to reach the purpose that improves sizing material storage stability and vulcanizes surface smoothness.
Description
Technical Field
The invention relates to the technical field of liquid silicone rubber, in particular to single-component addition type liquid silicone rubber.
Background
Most of the addition type silicone rubber sold in the market at present is bi-component, the two components are required to be uniformly mixed before use, the service life of the mixed rubber material is short, and equipment, instruments and the like are required to be cleaned after use. The single-component addition type silicone rubber has the advantages of convenience in storage and transportation, convenience in use and the like, avoids troubles caused by blending operation of two components and the like, is stable in viscosity and easy to control in curing, is suitable for various high-temperature rapid coating processes, and shows more advantages than the two components. The key problem is to solve the storage stability of the rubber material at room temperature, and at present, the method for solving the storage stability at room temperature is generally to add an inhibitor and a low-activity catalyst. The common inhibitor mainly adopts acetylene alcohol, amine and other volatile substances, and the problems of poor storage performance, sulfide surface wrinkling and the like are often caused by volatilization of the inhibitor in the storage and heating vulcanization processes of the inhibitor.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides the single-component addition type liquid silicone rubber, an inhibitor system is formed by adopting the phosphites with high-efficiency inhibiting effect and low volatility and the peroxide, the phosphites play a good inhibiting role on the platinum catalyst at low temperature, and the peroxide is heated and decomposed and oxidizes the phosphite after the temperature is raised, so that the inhibiting effect is lost, and the platinum catalyst recovers the catalytic capability, thereby achieving the purpose of improving the storage stability of the rubber material and the smoothness of the vulcanized surface.
In order to achieve the purpose, the invention provides the following technical scheme:
the single-component addition type liquid silicone rubber comprises the following components in parts by weight:
the viscosity of the low-viscosity vinyl silicone oil is 200-750mPa.s, and the viscosity of the high-viscosity vinyl silicone oil is 7500-20000 mPa.s.
Preferably, the phosphite is triphenyl phosphite.
Preferably, the peroxide is one of bis-tetra-, bis-penta-, and hydroperoxides.
Preferably, the filler is one or more of alumina, silica micropowder, aluminum nitride and boron nitride.
Preferably, the mass fraction of hydrogen in the hydrogen-containing silicone oil is 0.1-0.6%.
Preferably, the composition comprises the following components in parts by weight:
preferably, the composition comprises the following components in parts by weight:
preferably, the composition comprises the following components in parts by weight:
the invention has the following beneficial effects:
phosphite ester with high-efficiency inhibition effect and low volatility and peroxide are adopted to form an inhibitor system, the phosphite ester has good inhibition effect on the platinum catalyst at low temperature, the peroxide is heated and decomposed after the temperature is raised, the phosphite ester is oxidized, the inhibition effect on the platinum catalyst is lost, and the platinum catalyst recovers the catalytic capability, so that the aims of improving the storage stability of sizing materials and the smoothness of a vulcanized surface are fulfilled.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the following description is given for clear and complete description of the technical solution of the present invention with reference to the embodiments of the present invention, and other similar embodiments obtained by those skilled in the art without creative efforts based on the embodiments of the present application shall fall within the protection scope of the present application.
The first embodiment is as follows:
the single-component addition type liquid silicone rubber comprises the following components in parts by weight:
the viscosity of the low-viscosity vinyl silicone oil is 200mPa.s, and the viscosity of the high-viscosity vinyl silicone oil is 7500 mPa.s.
The phosphite is triphenyl phosphite.
The peroxide is one of bis-tetra, bis-penta and hydroperoxide, and in this embodiment is bis-tetra.
The mass fraction of hydrogen in the hydrogen-containing silicone oil is 0.1%.
The liquid silicone rubber with the components is heated at 120 ℃ for complete curing for 20min, and heated at 150 ℃ for complete curing for 6 min. After curing, the surface is flat, and the bonding strength with the base material aluminum is measured to be 1.60 MPa; the storage time at room temperature and the change in viscosity are shown in Table 1.
Example two:
the single-component addition type liquid silicone rubber comprises the following components in parts by weight:
the viscosity of the low-viscosity vinyl silicone oil is 500mPa.s, and the viscosity of the high-viscosity vinyl silicone oil is 10000 mPa.s.
The phosphite ester is triphenyl phosphite.
The peroxide is bis-di-penta.
The filler is alumina.
The mass fraction of hydrogen in the hydrogen-containing silicone oil is 0.4%.
The liquid silicone rubber with the components is heated at 120 ℃ for complete curing for 55min, and heated at 150 ℃ for complete curing for 13 min. The cured surface was flat, the adhesion strength to the base aluminum was 2.03MPa, the thermal conductivity was 0.9W/(K.m), and the storage time at room temperature and the change in viscosity are shown in Table 1.
Example three:
the single-component addition type liquid silicone rubber comprises the following components in parts by weight:
the viscosity of the low-viscosity vinyl silicone oil is 750mPa.s, and the viscosity of the high-viscosity vinyl silicone oil is 20000 mPa.s.
The phosphite ester is triphenyl phosphite.
The peroxide is bis-di-tetra.
The filler is aluminum nitride and boron nitride.
The mass fraction of hydrogen in the hydrogen-containing silicone oil is 0.6%.
The liquid silicon rubber with the components is heated at 120 ℃ for complete curing for 15min, and heated at 150 ℃ for complete curing for 5 min. The cured surface was flat, the adhesion strength to the base aluminum was 2.40MPa, the thermal conductivity was 3.0W/(K.m), and the storage time at room temperature and the change in viscosity are shown in Table 1.
Example four:
the single-component addition type liquid silicone rubber comprises the following components in parts by weight:
the viscosity of the low-viscosity vinyl silicone oil is 450mPa.s, and the viscosity of the high-viscosity vinyl silicone oil is 10000 mPa.s.
The phosphite ester is triphenyl phosphite.
The peroxide is bis-di-penta.
The filler is alumina.
The mass fraction of hydrogen in the hydrogen-containing silicone oil is 0.6%.
The liquid silicone rubber with the components is heated at 120 ℃ for complete curing for 75min, and heated at 150 ℃ for complete curing for 16 min. After curing, the surface was flat, the adhesion strength to the base aluminum was 1.83MPa, the thermal conductivity was 1.5W/(K.m), and the storage time at room temperature and the change in viscosity are shown in Table 1.
Example five:
the single-component addition type liquid silicone rubber comprises the following components in parts by weight:
the viscosity of the low-viscosity vinyl silicone oil is 500mPa.s, and the viscosity of the high-viscosity vinyl silicone oil is 20000 mPa.s.
The phosphite ester is triphenyl phosphite.
The peroxide is bis-di-penta.
The filler is silicon micropowder.
The mass fraction of hydrogen in the hydrogen-containing silicone oil is 0.45%.
The liquid silicone rubber with the components is heated at 120 ℃ for complete curing for 1h, and heated at 150 ℃ for complete curing for 15 min. The surface is flat after curing, the bonding strength with the base material aluminum can reach 2.7MPa, and the storage time and the viscosity change condition at room temperature are shown in Table 1.
Control group:
the conventional liquid silicone rubber is used as a control group, and the components of the control group are as follows:
the viscosity of the low-viscosity vinyl silicone oil is 200mPa.s, and the viscosity of the high-viscosity vinyl silicone oil is 7500 mPa.s.
The mass fraction of hydrogen in the hydrogen-containing silicone oil is 0.1%.
The liquid silicone rubber with the components is heated at 120 ℃ for complete curing for 45min, and heated at 150 ℃ for complete curing for 15 min. After curing, the surface has wrinkles, and the bonding strength with the base material aluminum is measured to be 1.4 MPa; the storage time at room temperature and the change in viscosity are shown in Table 1.
TABLE 1 relationship of residence time and viscosity change for one-component addition-type liquid silicone rubber
| Parking time | Day 0 | 50 days | 90 days | 120 days |
| Example one | 5.3 ten thousand mPa.s | 5.4 ten thousand mPa.s | 5.6 ten thousand mPa.s | 5.9 ten thousand mPa.s |
| Example two | 46.1 ten thousand mPa.s | 46.7 ten thousand mPa.s | 48.2 ten thousand mPa.s | 49.3 ten thousandmPa.s |
| EXAMPLE III | 253 ten thousand mPa.s | 255 ten thousand mPa.s | 259 ten thousand mPa.s | 261 ten thousand mPa.s |
| Example four | 35.7 ten thousand mPa.s | 35.9 ten thousand mPa.s | 36.3 ten thousand mPa.s | 38 ten thousand mPa.s |
| EXAMPLE five | 80.4 ten thousand mPa.s | 80.7 ten thousand mPa.s | 81 ten thousand mPa.s | 83.7 ten thousand mPa.s |
| Control group | 5.3 ten thousand mPa.s | 8.8 ten thousand mPa.s | 280 ten thousand mPa.s | Curing |
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (8)
1. The single-component addition type liquid silicone rubber is characterized by comprising the following components in parts by weight:
the viscosity of the low-viscosity vinyl silicone oil is 200-750mPa.s, and the viscosity of the high-viscosity vinyl silicone oil is 7500-20000 mPa.s.
2. The one-component addition type liquid silicone rubber according to claim 1, wherein the phosphite is triphenyl phosphite.
3. The one-component addition-type liquid silicone rubber according to claim 1, wherein the peroxide is one of bis-tetra-, bis-penta-, and hydroperoxides.
4. The one-component addition type liquid silicone rubber according to claim 1, wherein the filler is one or more of alumina, fine silica powder, aluminum nitride, and boron nitride.
5. The single-component addition type liquid silicone rubber according to claim 1, wherein the mass fraction of hydrogen in the hydrogen-containing silicone oil is 0.1 to 0.6%.
6. The one-component addition type liquid silicone rubber according to claim 1, comprising the following components in parts by weight:
7. the one-component addition type liquid silicone rubber according to claim 1, comprising the following components in parts by weight:
8. the one-component addition type liquid silicone rubber according to claim 1, comprising the following components in parts by weight:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210093143.6A CN114437550A (en) | 2022-01-26 | 2022-01-26 | Single-component addition type liquid silicone rubber |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210093143.6A CN114437550A (en) | 2022-01-26 | 2022-01-26 | Single-component addition type liquid silicone rubber |
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| Publication Number | Publication Date |
|---|---|
| CN114437550A true CN114437550A (en) | 2022-05-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210093143.6A Pending CN114437550A (en) | 2022-01-26 | 2022-01-26 | Single-component addition type liquid silicone rubber |
Country Status (1)
| Country | Link |
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| CN (1) | CN114437550A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4329275A (en) * | 1979-07-27 | 1982-05-11 | Toshiba Silicone Co., Ltd. | Heat-curable polysiloxane composition |
| US20040116561A1 (en) * | 2002-12-10 | 2004-06-17 | Shin-Etsu Chemical Co., Ltd. | One-part organopolysiloxane gel composition |
| US20060047097A1 (en) * | 2004-08-25 | 2006-03-02 | Shin-Etsu Chemical Co., Ltd. | One part organopolysiloxane gel composition |
| CN107868467A (en) * | 2016-09-23 | 2018-04-03 | 华成新材料（惠州）有限公司 | A kind of new addition-type silicon rubber and preparation method thereof |
| CN110669344A (en) * | 2019-10-24 | 2020-01-10 | 东莞市天桉硅胶科技有限公司 | Single-component addition type liquid silicone rubber and preparation method thereof |
-
2022
- 2022-01-26 CN CN202210093143.6A patent/CN114437550A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4329275A (en) * | 1979-07-27 | 1982-05-11 | Toshiba Silicone Co., Ltd. | Heat-curable polysiloxane composition |
| US20040116561A1 (en) * | 2002-12-10 | 2004-06-17 | Shin-Etsu Chemical Co., Ltd. | One-part organopolysiloxane gel composition |
| US20060047097A1 (en) * | 2004-08-25 | 2006-03-02 | Shin-Etsu Chemical Co., Ltd. | One part organopolysiloxane gel composition |
| CN107868467A (en) * | 2016-09-23 | 2018-04-03 | 华成新材料（惠州）有限公司 | A kind of new addition-type silicon rubber and preparation method thereof |
| CN110669344A (en) * | 2019-10-24 | 2020-01-10 | 东莞市天桉硅胶科技有限公司 | Single-component addition type liquid silicone rubber and preparation method thereof |
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Application publication date: 20220506 |