CN114634622A - Solvent-resistant fluorosilicone gel - Google Patents
Solvent-resistant fluorosilicone gel Download PDFInfo
- Publication number
- CN114634622A CN114634622A CN202210032638.8A CN202210032638A CN114634622A CN 114634622 A CN114634622 A CN 114634622A CN 202210032638 A CN202210032638 A CN 202210032638A CN 114634622 A CN114634622 A CN 114634622A
- Authority
- CN
- China
- Prior art keywords
- fluorosilicone
- vinyl
- solvent
- gel
- fluorine
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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- 239000002904 solvent Substances 0.000 title claims abstract description 30
- 239000011737 fluorine Substances 0.000 claims abstract description 30
- 229910052731 fluorine Inorganic materials 0.000 claims abstract description 30
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims abstract description 28
- 125000001153 fluoro group Chemical group F* 0.000 claims abstract description 5
- 239000003054 catalyst Substances 0.000 claims description 30
- 229910052739 hydrogen Inorganic materials 0.000 claims description 29
- 239000001257 hydrogen Substances 0.000 claims description 29
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 claims description 27
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 26
- 229910052751 metal Inorganic materials 0.000 claims description 17
- 239000002184 metal Substances 0.000 claims description 17
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 17
- 229920002554 vinyl polymer Polymers 0.000 claims description 15
- XUCNUKMRBVNAPB-UHFFFAOYSA-N fluoroethene Chemical compound FC=C XUCNUKMRBVNAPB-UHFFFAOYSA-N 0.000 claims description 14
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 14
- 229920001296 polysiloxane Polymers 0.000 claims description 8
- 239000002994 raw material Substances 0.000 claims description 8
- 229910052697 platinum Inorganic materials 0.000 claims description 7
- 125000000725 trifluoropropyl group Chemical group [H]C([H])(*)C([H])([H])C(F)(F)F 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 239000002318 adhesion promoter Substances 0.000 claims description 5
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 4
- 125000003668 acetyloxy group Chemical group [H]C([H])([H])C(=O)O[*] 0.000 claims description 4
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 claims description 3
- 150000002431 hydrogen Chemical class 0.000 claims description 3
- 125000000956 methoxy group Chemical group [H]C([H])([H])O* 0.000 claims description 3
- -1 methoxy, ethoxy Chemical group 0.000 claims description 3
- 229910052703 rhodium Inorganic materials 0.000 claims description 3
- 239000010948 rhodium Substances 0.000 claims description 3
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 claims description 3
- 229910052707 ruthenium Inorganic materials 0.000 claims description 3
- 239000000499 gel Substances 0.000 abstract description 24
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 9
- 239000000741 silica gel Substances 0.000 abstract description 7
- 229910002027 silica gel Inorganic materials 0.000 abstract description 7
- 230000000694 effects Effects 0.000 abstract description 5
- 239000000126 substance Substances 0.000 abstract description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 6
- 238000005485 electric heating Methods 0.000 description 6
- 229910052710 silicon Inorganic materials 0.000 description 6
- 239000010703 silicon Substances 0.000 description 6
- 238000002360 preparation method Methods 0.000 description 5
- IMNFDUFMRHMDMM-UHFFFAOYSA-N N-Heptane Chemical compound CCCCCCC IMNFDUFMRHMDMM-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/22—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen and oxygen
- C08G77/24—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen and oxygen halogen-containing groups
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/20—Polysiloxanes containing silicon bound to unsaturated aliphatic groups
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)
- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention relates to the field of chemical industry. The solvent-resistant fluorosilicone gel contains 50-95% of fluorine element by mass percent. The invention improves the content of fluorine element in the silica gel, and fluorine atoms have good shielding effect and can effectively protect the main chain, thereby effectively improving the solvent resistance of the invention.
Description
Technical Field
The invention relates to the field of chemical industry, in particular to silica gel.
Background
At present, the inner chip is protected by encapsulating silica gel in the automobile sensor and electronic industry, but the problem of poor solvent resistance generally exists in the existing silica gel.
Disclosure of Invention
The present invention is directed to a solvent-resistant fluorosilicone gel, which solves the above problems.
The technical problem solved by the invention can be realized by adopting the following technical scheme:
the solvent-resistant fluorosilicone gel is characterized by containing 50-95% of fluorine element by mass.
The invention improves the content of fluorine element in the silica gel, and fluorine atoms have good shielding effect and can effectively protect the main chain, thereby effectively improving the solvent resistance of the invention.
Preferably, the raw material of the solvent-resistant fluorosilicone gel comprises 85-95% of vinyl fluorosilicone, 5-10% of hydrogen fluorosilicone, 1-3% of tackifier and 0.01-1% of metal catalyst.
Further preferably, the vinyl fluorosilicone includes a vinyl-terminated fluorosilicone, and a fluorosilicone having a vinyl group in a side chain.
Further preferably, wherein the hydrogen-containing fluorosilicones include terminal Si-H fluorosilicones and lateral hydrogen-containing Si-H siloxanes.
More preferably, the tackifier is a fluorine-containing silane coupling agent. The fluorine-containing silane coupling agent is preferably of the structural formula R (CH)2)2SiX3Wherein R is trifluoropropyl, and X comprises any one of methoxy, ethoxy and acetoxy.
More preferably, the metal catalyst is at least one of ruthenium, rhodium, and platinum. Preferably, the metal catalyst is a platinum catalyst at a concentration of 3000-4000 ppm.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below.
The solvent-resistant fluorosilicone gel is characterized by containing 50-95% of fluorine element by mass. The invention improves the content of fluorine element in the silica gel, and fluorine atoms have good shielding effect and can effectively protect the main chain, thereby effectively improving the solvent resistance of the invention.
Raw materials of the solvent-resistant fluorosilicone gel:
85-95% of vinyl fluorine-containing siloxane, 5-10% of hydrogen-containing fluorosilicone, 1-3% of tackifier and 0.01-1% of metal catalyst.
The preparation method of the solvent-resistant fluorosilicone gel comprises the following steps:
firstly, mixing vinyl fluorine-containing siloxane, hydrogen-containing fluorine-containing siloxane and tackifier, and then adding a catalyst for reaction to obtain the fluorine-containing silicone gel.
Specific example 1:
the raw materials are as follows: 90% of vinyl fluorine-containing siloxane, 7% of hydrogen-containing fluorosilicone, 2% of adhesion promoter and 1% of metal catalyst. The preparation method comprises the following steps: firstly, mixing vinyl fluorine-containing siloxane, hydrogen-containing fluorine-containing siloxane and tackifier, and then adding a catalyst for reaction to obtain the fluorine-containing silicone gel 1.
The vinyl fluorosilicone includes a vinyl terminated fluorosilicone. The hydrogen-containing fluorosilicone is a Si-H terminated fluorosilicone. The structural formula of the tackifier is R (CH)2)2SiX3Wherein R is trifluoropropyl and X isAnd (3) methoxy. The metal catalyst is a ruthenium catalyst, and the concentration is 3000 ppm.
Specific example 2:
the raw materials are as follows: 93.99% of vinyl fluorine-containing siloxane, 5% of hydrofluosiloxane, 1% of adhesion promoter and 0.01% of metal catalyst. The preparation method comprises the following steps: firstly, mixing vinyl fluorine-containing siloxane, hydrogen-containing fluorine-containing siloxane and tackifier, and then adding a catalyst for reaction to obtain the fluorine-containing silicone gel 2.
The vinyl fluorine-containing siloxane is fluorosilicone containing vinyl on a side chain. The hydrogen-containing fluorosilicone is a pendant hydrogen Si-H siloxane. The structural formula of the tackifier is R (CH)2)2SiX3Wherein R is trifluoropropyl and X is acetoxy. The metal catalyst is a rhodium catalyst, and the concentration is 3000 ppm.
Specific example 3:
the raw materials are as follows: 86% of vinyl fluorine-containing siloxane, 10% of hydrogen-containing fluorosilicone, 3% of tackifier and 1% of metal catalyst. The preparation method comprises the following steps: firstly, mixing vinyl fluorine-containing siloxane, hydrogen-containing fluorine-containing siloxane and tackifier, and then adding a catalyst for reaction to obtain the fluorine-containing silicone gel 3.
The vinyl fluorine-containing siloxane comprises vinyl-terminated fluorosilicone and fluorosilicone with a side chain containing vinyl, and the mass percentage of the vinyl-terminated fluorosilicone to the fluorosilicone with a side chain containing vinyl is 0.5: 1. The hydrogen-containing fluorosilicone comprises terminal Si-H fluorosilicone and lateral hydrogen Si-H siloxane, wherein the mass percentage of the terminal Si-H fluorosilicone to the lateral hydrogen Si-H siloxane is 1: 0.5. The structural formula of the tackifier is R (CH)2)2SiX3Wherein R is trifluoropropyl and X comprises methoxy. The metal catalyst is a platinum catalyst, and the concentration is 4000 ppm.
Specific example 4:
the raw materials are as follows: 92% of vinyl fluorine-containing siloxane, 6% of hydrogen-containing fluorosilicone, 1% of adhesion promoter and 1% of metal catalyst. The preparation method comprises the following steps: firstly, mixing vinyl fluorine-containing siloxane, hydrogen-containing fluorine-containing siloxane and tackifier, and then adding a catalyst for reaction to obtain the fluorine-containing silicone gel 4.
The vinyl fluorosilicone is a vinyl terminated fluorosilicone. The hydrogen-containing fluorosilicone comprises terminal Si-H fluorosilicone and lateral hydrogen Si-H siloxane, wherein the mass percentage of the terminal Si-H fluorosilicone to the lateral hydrogen Si-H siloxane is 1: 0.5. The structural formula of the tackifier is R (CH)2)2SiX3Wherein R is trifluoropropyl and X is acetoxy. The metal catalyst is a platinum catalyst and has a concentration of 4000 ppm.
Comparative example:
silica gels were purchased directly from the market.
Solvent resistance test method:
commercially available silicon gel, fluorine-containing silicon gel 1, fluorine-containing silicon gel 2, fluorine-containing silicon gel 3 and fluorine-containing silicon gel 4 with equal mass are respectively soaked in toluene, gasoline, engine oil and n-heptane for 48 hours, and are taken out and weighed to test the solvent resistance of the fluorine-containing silicon gel.
From the above test data, it can be seen that:
1. no dissolution of the silica gel occurred, reflecting the solvent resistance of the fluorosilicone gel of the present invention.
2. The reason for the weight increase is that the gel adsorbs or adheres to the solvent, and the weight increase effect of the fluorine-containing silicone gel 3 in each solvent is smaller, so that the fluorine-containing silicone gel 3 not only has solvent resistance, but also is not easy to adsorb or adhere to the solvent, and is more ideal pouring sealing material.
The cone penetration of the invention is preferably 170-200 mm/10. Thereby ensuring that the filling has certain flowability and cannot flow uncontrollably. The electric heating bottle can be put into a bottle, the bottom and the side wall of the bottle are spirally wound with electric heating wires, the electric heating wires are connected with a temperature adjusting device, and the temperature adjusting device is connected with a power supply. The bottle is heated by the electric heating wire, so that the temperature of the electric heating bottle is adjusted to a certain degree, and the cone penetration of the electric heating bottle is further adjusted. So that the liquid can flow out of the bottle quickly and then flow on the pouring surface in order.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, but that various changes and modifications may be made without departing from the spirit and scope of the invention, and such changes and modifications are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. The solvent-resistant fluorosilicone gel is characterized by containing 50-95% of fluorine element by mass.
2. The solvent-resistant fluorosilicone gel of claim 1, wherein the raw materials of the solvent-resistant fluorosilicone gel comprise 85-95% of vinyl fluorosilicone, 5-10% of hydrogen fluorosilicone, 1-3% of adhesion promoter, and 0.01-1% of metal catalyst.
3. The solvent-resistant fluorosilicone gel of claim 2, wherein the vinyl fluorosilicone comprises a vinyl terminated fluorosilicone, a fluorosilicone having a vinyl group in a side chain.
4. The solvent resistant fluorosilicone gel of claim 2, wherein the hydrogen-containing fluorosilicone comprises a terminal Si-H fluorosilicone and a lateral hydrogen Si-H fluorosilicone.
5. The solvent-resistant fluorosilicone gel of claim 2, wherein the adhesion promoter is a fluorine-containing silane coupling agent.
6. The solvent-resistant fluorosilicone gel of claim 5, wherein the structural formula of the fluorine-containing silane coupling agent is R (CH)2)2SiX3Wherein R is trifluoropropyl, and X comprises any one of methoxy, ethoxy and acetoxy.
7. The solvent-resistant fluorosilicone gel of claim 2, wherein the metal catalyst is at least one of ruthenium, rhodium, and platinum.
8. The solvent-resistant fluorosilicone gel of claim 7, wherein the metal catalyst is a platinum catalyst at a concentration of 3000-4000 ppm.
9. The solvent-resistant fluorosilicone gel of claim 2, wherein the raw materials are 86% of vinyl fluorosilicone, 10% of hydrogen fluorosilicone, 3% of tackifier and 1% of metal catalyst;
mixing vinyl fluorine-containing siloxane, hydrogen-containing fluorine-containing siloxane and tackifier, and then adding a catalyst for reaction to obtain fluorine-containing silicone gel;
the vinyl fluorine-containing siloxane comprises vinyl-terminated fluorosilicone and fluorosilicone with a side chain containing vinyl, wherein the mass percentage of the vinyl-terminated fluorosilicone to the fluorosilicone with a side chain containing vinyl is 0.5: 1; the hydrogen-containing fluorosilicone comprises terminal Si-H fluorosilicone and lateral hydrogen Si-H siloxane, wherein the mass percentage of the terminal Si-H fluorosilicone to the lateral hydrogen Si-H siloxane is 1: 0.5; the structural formula of the tackifier is R (CH)2)2SiX3Wherein R is trifluoropropyl and X comprises methoxy; the metal catalyst is a platinum catalyst and has a concentration of 4000 ppm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210032638.8A CN114634622A (en) | 2022-01-12 | 2022-01-12 | Solvent-resistant fluorosilicone gel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210032638.8A CN114634622A (en) | 2022-01-12 | 2022-01-12 | Solvent-resistant fluorosilicone gel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114634622A true CN114634622A (en) | 2022-06-17 |
Family
ID=81946353
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210032638.8A Pending CN114634622A (en) | 2022-01-12 | 2022-01-12 | Solvent-resistant fluorosilicone gel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114634622A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4898903A (en) * | 1989-03-14 | 1990-02-06 | Dow Corning Corporation | Thermally stable fluorinated organosiloxane gel composition |
| JPH06179819A (en) * | 1992-12-14 | 1994-06-28 | Shin Etsu Chem Co Ltd | Solvent-resistant silicone gel composition |
| JPH0770444A (en) * | 1993-06-30 | 1995-03-14 | Shin Etsu Chem Co Ltd | Composition for solvent resistant silicone gel |
| US5519096A (en) * | 1993-06-30 | 1996-05-21 | Shin-Etsu Chemical Co., Ltd. | Compounds for solvent resistant silicone gels |
-
2022
- 2022-01-12 CN CN202210032638.8A patent/CN114634622A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4898903A (en) * | 1989-03-14 | 1990-02-06 | Dow Corning Corporation | Thermally stable fluorinated organosiloxane gel composition |
| JPH06179819A (en) * | 1992-12-14 | 1994-06-28 | Shin Etsu Chem Co Ltd | Solvent-resistant silicone gel composition |
| JPH0770444A (en) * | 1993-06-30 | 1995-03-14 | Shin Etsu Chem Co Ltd | Composition for solvent resistant silicone gel |
| US5519096A (en) * | 1993-06-30 | 1996-05-21 | Shin-Etsu Chemical Co., Ltd. | Compounds for solvent resistant silicone gels |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220617 |
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| RJ01 | Rejection of invention patent application after publication |