CN107021976B - A kind of preparation method of two hydrogen-based diphenyl trisiloxanes of tetramethyl - Google Patents
A kind of preparation method of two hydrogen-based diphenyl trisiloxanes of tetramethyl Download PDFInfo
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- CN107021976B CN107021976B CN201710107516.XA CN201710107516A CN107021976B CN 107021976 B CN107021976 B CN 107021976B CN 201710107516 A CN201710107516 A CN 201710107516A CN 107021976 B CN107021976 B CN 107021976B
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- hydrogen
- tetramethyl
- diphenyl trisiloxanes
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- dimethoxydiphenylsilane
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- 239000001257 hydrogen Substances 0.000 title claims abstract description 49
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 49
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 46
- 125000003698 tetramethyl group Chemical group [H]C([H])([H])* 0.000 title claims abstract description 39
- VJJJVFXZIZLJRT-UHFFFAOYSA-N diphenyl(disilyloxy)silane Chemical class C1(=CC=CC=C1)[Si](O[SiH3])(O[SiH3])C1=CC=CC=C1 VJJJVFXZIZLJRT-UHFFFAOYSA-N 0.000 title claims abstract description 27
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 238000003756 stirring Methods 0.000 claims abstract description 23
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical compound [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 claims abstract description 15
- QAOWNCQODCNURD-UHFFFAOYSA-N sulfuric acid Substances OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 15
- 238000003828 vacuum filtration Methods 0.000 claims abstract description 11
- AHUXYBVKTIBBJW-UHFFFAOYSA-N dimethoxy(diphenyl)silane Chemical compound C=1C=CC=CC=1[Si](OC)(OC)C1=CC=CC=C1 AHUXYBVKTIBBJW-UHFFFAOYSA-N 0.000 claims abstract description 9
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical group [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 10
- 229910000029 sodium carbonate Inorganic materials 0.000 claims description 7
- UIIMBOGNXHQVGW-DEQYMQKBSA-M Sodium bicarbonate-14C Chemical compound [Na+].O[14C]([O-])=O UIIMBOGNXHQVGW-DEQYMQKBSA-M 0.000 claims description 2
- 239000000706 filtrate Substances 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 4
- 238000009833 condensation Methods 0.000 abstract description 3
- 230000005494 condensation Effects 0.000 abstract description 3
- 229920000642 polymer Polymers 0.000 abstract description 3
- 230000002194 synthesizing effect Effects 0.000 abstract description 3
- 230000003301 hydrolyzing effect Effects 0.000 abstract description 2
- 150000003961 organosilicon compounds Chemical class 0.000 abstract description 2
- 230000008569 process Effects 0.000 abstract description 2
- 235000010290 biphenyl Nutrition 0.000 description 10
- 239000004305 biphenyl Substances 0.000 description 10
- 125000006267 biphenyl group Chemical group 0.000 description 10
- ZUOUZKKEUPVFJK-UHFFFAOYSA-N phenylbenzene Natural products C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 description 10
- 238000009835 boiling Methods 0.000 description 9
- 238000004587 chromatography analysis Methods 0.000 description 8
- 238000001514 detection method Methods 0.000 description 8
- ARYZCSRUUPFYMY-UHFFFAOYSA-N methoxysilane Chemical compound CO[SiH3] ARYZCSRUUPFYMY-UHFFFAOYSA-N 0.000 description 8
- 238000006116 polymerization reaction Methods 0.000 description 7
- UIIMBOGNXHQVGW-UHFFFAOYSA-M Sodium bicarbonate Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 6
- 239000000047 product Substances 0.000 description 6
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 5
- -1 siloxanes Chemical class 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- OSXYHAQZDCICNX-UHFFFAOYSA-N dichloro(diphenyl)silane Chemical compound C=1C=CC=CC=1[Si](Cl)(Cl)C1=CC=CC=C1 OSXYHAQZDCICNX-UHFFFAOYSA-N 0.000 description 3
- 230000007062 hydrolysis Effects 0.000 description 3
- 238000006460 hydrolysis reaction Methods 0.000 description 3
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 3
- 229920002545 silicone oil Polymers 0.000 description 3
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 3
- 235000017557 sodium bicarbonate Nutrition 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 239000008346 aqueous phase Substances 0.000 description 2
- 150000002431 hydrogen Chemical class 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- OBNDGIHQAIXEAO-UHFFFAOYSA-N [O].[Si] Chemical compound [O].[Si] OBNDGIHQAIXEAO-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 125000000217 alkyl group Chemical group 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 238000006482 condensation reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000004821 distillation Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 229960001484 edetic acid Drugs 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- NOKUWSXLHXMAOM-UHFFFAOYSA-N hydroxy(phenyl)silicon Chemical compound O[Si]C1=CC=CC=C1 NOKUWSXLHXMAOM-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 229920005749 polyurethane resin Polymers 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
- C07F7/02—Silicon compounds
- C07F7/08—Compounds having one or more C—Si linkages
- C07F7/0834—Compounds having one or more O-Si linkage
- C07F7/0838—Compounds with one or more Si-O-Si sequences
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
- C07F7/00—Compounds containing elements of Groups 4 or 14 of the Periodic Table
- C07F7/02—Silicon compounds
- C07F7/08—Compounds having one or more C—Si linkages
- C07F7/0834—Compounds having one or more O-Si linkage
- C07F7/0838—Compounds with one or more Si-O-Si sequences
- C07F7/0872—Preparation and treatment thereof
- C07F7/0874—Reactions involving a bond of the Si-O-Si linkage
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
Abstract
The invention belongs to the technical fields of synthesizing organo-silicon compound, disclose a kind of preparation method of two hydrogen-based diphenyl trisiloxanes of tetramethyl, it comprises the steps of: being stirred at room temperature down, to dropwise addition two hydrogen-based disiloxane of tetramethyl in the mixed liquor of dimethoxydiphenylsilane and the concentrated sulfuric acid, time for adding is 2 ~ 4h, continue stirring 12 ~ for 24 hours after being added dropwise, neutralizer is added, stir 1 ~ 2h, vacuum filtration, rectification under vacuum filtrate intercepts the fraction of 130 ~ 131 DEG C/2.5mmHg, obtains two hydrogen-based diphenyl trisiloxanes of tetramethyl.The present invention is reacted using anhydrous system, avoids dimethoxydiphenylsilane and itself hydrolytic condensation generation polymer easily occurs in aqueous systems.The present invention provides a kind of simple processes, the preparation method of stable, high income the two hydrogen-based diphenyl trisiloxanes of tetramethyl of quality.
Description
Technical field
The invention belongs to the technical fields of synthesizing organo-silicon compound, and in particular to a kind of two hydrogen-based diphenyl three of tetramethyl
The preparation method of siloxanes.
Background technique
Two hydrogen-based diphenyl trisiloxanes of tetramethyl belongs to the scope of containing hydrogen silicone oil, is a kind of Silicon Containing Hydrogen of special construction
Oil has the smallest degree of polymerization, i.e. the degree of polymerization is 1.It equally has the property of containing hydrogen silicone oil, it can prepares as silicon rubber
Crosslinking agent and polymer modification intermediate.
The two hydrogen-based diphenyl trisiloxanes structural formula of tetramethyl is as follows:
Appearance colorless transparency liquid, refractive index (25 DEG C): 1.500, boiling point: 130 ~ 131 DEG C/2.5mmHg.
Two hydrogen-based diphenyl trisiloxanes of tetramethyl is a kind of important silicone intermediate, can be used for synthesizing among medicine
Body, phenyl silicone oil, phenyl polysiloxane, phenyl siloxane rubber etc.；Be also used as polyurethane resin, epoxy resin, acrylic resin,
The modification intermediate of PP, PET, PE etc. assign the performances such as new product high-low temperature resistant, radiation hardness, ageing-resistant；Grafted epoxy, polyethers,
The groups such as alkyl can get the auxiliary agent of specific function.
In general, the methylsiloxane product and phenyl organosilicon product of refractive index 0.02 are immiscible, so wanting
Want to obtain the organosilicon product that intermiscibility is good, transparency is high, it is necessary to the same or similar raw material of selective refraction rate.And tetramethyl two
Hydrogen-based diphenyl trisiloxanes can be mixed due to its special molecular structure with the organosilicon materials of arbitrary refractive index, be obtained
Transparent product.
Two hydrogen-based diphenyl trisiloxanes of tetramethyl is lesser since the hydrogen-based with the smallest degree of polymerization, end has
Steric hindrance, so there is very high reactivity, it can fast reaction and being capable of fully reacting at low temperature.Its low viscosity, high refraction
The characteristics of characteristic of rate can reduce the viscosity of modified product, assign smooth, non-greasy, the dispersion of easy levelling.
In general, using diphenyl dichlorosilane, two hydrogen-based disiloxane of tetramethyl, water as raw material, under the action of catalyst into
Row hydrolysis, condensation, generate the phenyl hydrogen containing siloxane mixture of different polymerization degree, wherein four of single degree of polymerization containing 2 ~ 4%
Two hydrogen-based diphenyl trisiloxanes of methyl, yield are low.In above-mentioned aqueous phase reactions system, the hydrolysis rate of diphenyl dichlorosilane
There is biggish difference with the sealing end rate of two hydrogen-based disiloxane of tetramethyl, diphenyl dichlorosilane inevitably occurs
Itself hydrolysis-condensation reaction, and be difficult to form two hydrogen-based diphenyl of tetramethyl, the three silicon oxygen of a large amount of single degree of polymerization with end-capping reagent
Alkane, therefore to obtain a large amount of two hydrogen-based diphenyl trisiloxanes of tetramethyl, it is more difficult rule using water phase hydrolysis and high temperature distillation
Modelling.
Summary of the invention
In order to overcome the shortcomings and deficiencies of the prior art, the purpose of the present invention is to provide a kind of simple process, quality are steady
The preparation method of fixed, high income two hydrogen-based diphenyl trisiloxanes of tetramethyl.
Reaction equation of the invention are as follows:
The purpose of the present invention is achieved by following technical proposals:
A kind of preparation method of two hydrogen-based diphenyl trisiloxanes of tetramethyl, specifically includes the following steps:
It is stirred at room temperature down, to dropwise addition two hydrogen-based of tetramethyl, two silicon in the mixed liquor of dimethoxydiphenylsilane and the concentrated sulfuric acid
Oxygen alkane, time for adding are 2 ~ 4h, continue stirring 12 ~ for 24 hours after being added dropwise, neutralizer is added, and stir 1 ~ 2h, and vacuum filtration subtracts
Rectifying filtrate is pressed, the fraction of 130 ~ 131 DEG C/2.5mmHg is intercepted, obtains two hydrogen-based diphenyl trisiloxanes of tetramethyl.
The dosage of the concentrated sulfuric acid is the 5 ~ 10% of dimethoxydiphenylsilane quality.
The dosage of the two hydrogen-based disiloxane of tetramethyl is the 80 ~ 200% of dimethoxydiphenylsilane quality.
The neutralizer is sodium carbonate or sodium bicarbonate, and dosage is 2 ~ 4 times of concentrated sulfuric acid quality.
Compared with prior art, the present invention have it is below the utility model has the advantages that
(1) present invention is reacted using anhydrous system, is avoided dimethoxydiphenylsilane and is easily occurred certainly in aqueous systems
Body hydrolytic condensation generates polymer, and mainly generates single degree of polymerization molecule；
(2) method of present invention synthesis two hydrogen-based diphenyl trisiloxanes of tetramethyl, high income are much larger than aqueous phase reactions body
It is the two hydrogen-based diphenyl trisiloxanes of tetramethyl obtained.
Specific embodiment
Further details of explanation is made to the present invention below with reference to embodiment, embodiments of the present invention are not limited thereto.
Embodiment 1
200g diphenyl two is added into the 2L four-hole boiling flask for installing thermometer, constant pressure funnel, blender, condenser pipe
Methoxy silane, adds the concentrated sulfuric acid that 10g mass concentration is 98%, and stirring 10min is mixed；It is slowly dripped through constant pressure funnel
Add two hydrogen-based disiloxane of 160g tetramethyl, time for adding 2h continues to stir 12h after being added dropwise, and 20g sodium carbonate is added and neutralizes
1h, vacuum filtration are evaporated under reduced pressure filtrate, intercept the fraction of 130 ~ 131 DEG C/2.5mmHg, obtain colourless transparent liquid, as four
Two hydrogen-based diphenyl trisiloxanes of methyl.Weigh 234g, yield 86.03%, and chromatography detection level is 99.4%.
Embodiment 2
200g diphenyl two is added into the 2L four-hole boiling flask for installing thermometer, constant pressure funnel, blender, condenser pipe
Methoxy silane, adds the concentrated sulfuric acid that 20g mass concentration is 98%, and stirring 10min is mixed；It is slowly dripped through constant pressure funnel
Add two hydrogen-based disiloxane of 400g tetramethyl, time for adding 4h continues stirring for 24 hours after being added dropwise, 80g sodium carbonate is added and neutralizes
2h, vacuum filtration are evaporated under reduced pressure filtrate, intercept the fraction of 130 ~ 131 DEG C/2.5mmHg, obtain colourless transparent liquid, as four
Two hydrogen-based diphenyl trisiloxanes of methyl.Weigh 242g, yield 88.97%, and chromatography detection level is 99.5%.
Embodiment 3
200g diphenyl two is added into the 2L four-hole boiling flask for installing thermometer, constant pressure funnel, blender, condenser pipe
Methoxy silane, adds the concentrated sulfuric acid that 15g mass concentration is 98%, and stirring 10min is mixed；It is slowly dripped through constant pressure funnel
Add two hydrogen-based disiloxane of 300g tetramethyl, time for adding 3h continues to stir 15h after being added dropwise, be added in 50g sodium bicarbonate
And 1h, vacuum filtration are evaporated under reduced pressure filtrate, intercept the fraction of 130 ~ 131 DEG C/2.5mmHg, obtain colourless transparent liquid, as
Two hydrogen-based diphenyl trisiloxanes of tetramethyl.Weigh 238g, yield 87.5%, and chromatography detection level is 99.4%.
Embodiment 4
200g diphenyl two is added into the 2L four-hole boiling flask for installing thermometer, constant pressure funnel, blender, condenser pipe
Methoxy silane, adds the concentrated sulfuric acid that 15g mass concentration is 98%, and stirring 10min is mixed；It is slowly dripped through constant pressure funnel
Add two hydrogen-based disiloxane of 200g tetramethyl, time for adding 2.2h continues to stir 15h after being added dropwise, be added in 40g sodium carbonate
And 1.5h, vacuum filtration are evaporated under reduced pressure filtrate, intercept the fraction of 130 ~ 131 DEG C/2.5mmHg, obtain colourless transparent liquid, i.e.,
For two hydrogen-based diphenyl trisiloxanes of tetramethyl.Weigh 236g, yield 86.76%, and chromatography detection level is 99.6%.
Embodiment 5
200g diphenyl two is added into the 2L four-hole boiling flask for installing thermometer, constant pressure funnel, blender, condenser pipe
Methoxy silane, adds the concentrated sulfuric acid that 16g mass concentration is 98%, and stirring 10min is mixed；It is slowly dripped through constant pressure funnel
Add two hydrogen-based disiloxane of 250g tetramethyl, time for adding 3h continues to stir 18h after being added dropwise, be added in 50g sodium bicarbonate
And 2h, vacuum filtration are evaporated under reduced pressure filtrate, intercept the fraction of 130 ~ 131 DEG C/2.5mmHg, obtain colourless transparent liquid, as
Two hydrogen-based diphenyl trisiloxanes of tetramethyl.Weigh 231g, yield 84.92%, and chromatography detection level is 99.6%.
Embodiment 6
200g diphenyl two is added into the 2L four-hole boiling flask for installing thermometer, constant pressure funnel, blender, condenser pipe
Methoxy silane, adds the concentrated sulfuric acid that 18g mass concentration is 98%, and stirring 10min is mixed；It is slowly dripped through constant pressure funnel
Add two hydrogen-based disiloxane of 360g tetramethyl, time for adding 4h continues to stir 20h after being added dropwise, and 60g sodium carbonate is added and neutralizes
2h, vacuum filtration are evaporated under reduced pressure filtrate, intercept the fraction of 130 ~ 131 DEG C/2.5mmHg, obtain colourless transparent liquid, as four
Two hydrogen-based diphenyl trisiloxanes of methyl.Weigh 239g, yield 87.88%, and chromatography detection level is 99.4%.
Embodiment 7
200g diphenyl two is added into the 2L four-hole boiling flask for installing thermometer, constant pressure funnel, blender, condenser pipe
Methoxy silane, adds the concentrated sulfuric acid that 16g mass concentration is 98%, and stirring 10min is mixed；It is slowly dripped through constant pressure funnel
Add two hydrogen-based disiloxane of 320g tetramethyl, time for adding 3.5h continues to stir 18h after being added dropwise, 60g sodium bicarbonate is added
1h is neutralized, vacuum filtration is evaporated under reduced pressure filtrate, intercepts the fraction of 130 ~ 131 DEG C/2.5mmHg, obtains colourless transparent liquid, i.e.,
For two hydrogen-based diphenyl trisiloxanes of tetramethyl.Weigh 237g, yield 87.13%, and chromatography detection level is 99.7%.
Embodiment 8
200g diphenyl two is added into the 2L four-hole boiling flask for installing thermometer, constant pressure funnel, blender, condenser pipe
Methoxy silane, adds the concentrated sulfuric acid that 12g mass concentration is 98%, and stirring 10min is mixed；It is slowly dripped through constant pressure funnel
Add two hydrogen-based disiloxane of 260g tetramethyl, time for adding 3h continues to stir 20h after being added dropwise, and 20g sodium carbonate is added and neutralizes
2h, vacuum filtration are evaporated under reduced pressure filtrate, intercept the fraction of 130 ~ 131 DEG C/2.5mmHg, obtain colourless transparent liquid, as four
Two hydrogen-based diphenyl trisiloxanes of methyl.Weigh 232g, yield 85.29%, and chromatography detection level is 99.4%.
Claims (1)
1. a kind of preparation method of two hydrogen-based diphenyl trisiloxanes of tetramethyl, it is characterised in that: comprise the steps of: room temperature
Under stirring, to two hydrogen-based disiloxane of tetramethyl is added dropwise in the mixed liquor of dimethoxydiphenylsilane and the concentrated sulfuric acid, when dropwise addition
Between be 2~4h, continue stirring 12~for 24 hours after being added dropwise, neutralizer be added, stir 1~2h, vacuum filtration, rectification under vacuum filter
Liquid intercepts the fraction of 130~131 DEG C/2.5mmHg, obtains two hydrogen-based diphenyl trisiloxanes of tetramethyl；
The dosage of the concentrated sulfuric acid is the 5~10% of dimethoxydiphenylsilane quality；
The dosage of the two hydrogen-based disiloxane of tetramethyl is the 80~200% of dimethoxydiphenylsilane quality；
The neutralizer is sodium carbonate or sodium bicarbonate, and dosage is 2~4 times of concentrated sulfuric acid quality.
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| CN108084220B (en) * | 2018-01-08 | 2020-08-07 | 广东省稀有金属研究所 | Preparation method of tetramethyldivinyldiphenyltrisiloxane |
| CN108003185B (en) * | 2018-01-08 | 2020-08-07 | 广东省稀有金属研究所 | Preparation method of hexamethyl diphenyl trisiloxane |
| CN108440592B (en) * | 2018-03-23 | 2020-06-05 | 威海新元化工有限公司 | Preparation method of 1, 5-divinyl-1, 1,3,3,5, 5-hexamethyl trisiloxane |
| CN115322578B (en) * | 2022-08-29 | 2024-01-02 | 新元化学(山东)股份有限公司 | Ultralow-hardness liquid fluorosilicone rubber and preparation method thereof |
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| EP3034535A1 (en) * | 2014-12-18 | 2016-06-22 | Shin-Etsu Chemical Co., Ltd. | Epoxy resin containing silicone-modified epoxy resin and polyvalent carboxylic acid compound, and cured product thereof |
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| KR101454798B1 (en) * | 2012-05-25 | 2014-10-28 | 다미폴리켐 주식회사 | Siloxane cross linker for sealing material of light emitting diode |
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