CN110041710A - A kind of low transmission resistance silicone tube and preparation method thereof - Google Patents

A kind of low transmission resistance silicone tube and preparation method thereof Download PDF

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Publication number
CN110041710A
CN110041710A CN201910370894.6A CN201910370894A CN110041710A CN 110041710 A CN110041710 A CN 110041710A CN 201910370894 A CN201910370894 A CN 201910370894A CN 110041710 A CN110041710 A CN 110041710A
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Prior art keywords
parts
low transmission
transmission resistance
silicone tube
glue
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CN201910370894.6A
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Chinese (zh)
Inventor
欧阳明
刘芳林
周月
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Kunshan Kangxiang Electronic Technology Co Ltd
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Kunshan Kangxiang Electronic Technology Co Ltd
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Priority to CN201910370894.6A priority Critical patent/CN110041710A/en
Publication of CN110041710A publication Critical patent/CN110041710A/en
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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
    • 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
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/2296—Oxides; Hydroxides of metals of zinc
    • 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
    • C08K2003/265—Calcium, strontium or barium carbonate
    • 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
    • C08K2201/011—Nanostructured additives
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00—Applications
    • C08L2203/18—Applications used for pipes
    • 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
    • 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
    • C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend

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  • 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 kind of low transmission resistance silicone tubes and preparation method thereof, low transmission resistance silicone tube score by weight includes 80-120 parts of methyl vinyl silicone rubber, 5-15 parts of butadiene rubber, 5-15 parts of carbon black, 2-5 parts of stearic acid, 5-10 parts of nano zine oxide, 10-20 parts of nanometer calcium carbonate, 2-10 parts of plasticizer, 1-5 parts of anti-aging agent, 0.5-2 parts of sulphur, 1-3 parts of vulcanization accelerator, 2-5 parts of silane coupling agent, 10-20 parts of dimethicone, 15-25 parts of paraffin oil, 107 10-20 parts of glue, 0.1-0.5 parts of catalyst, the present invention passes through silane coupling agent, dimethicone can form organosilicon macromolecular structure in tube wall and tube body, with 107 glue collective effects, with preferable smoothing effect, have simultaneously preferably Rebound effect.

Description

A kind of low transmission resistance silicone tube and preparation method thereof
Technical field
The present invention relates to silicone tube field of material technology more particularly to a kind of low transmission resistance silicone tube and its preparation sides Method.
Background technique
Silicone tube is circulation and the coated carrier of liquid, gas and other materials, is widely used in modern industry, national defence Industry and daily necessities in, silicone tube by raw-silastic continuously be added on twin-screw extruder or closed kneader in, gradually plus Enter white carbon black and other auxiliary agents it is repeatedly refining after, products are made by extrusion.
Common silicone tube has medical silicone tube, food grade silicone pipe, industrial silicon sebific duct, silica gel shape tube, silicone tube to match Part etc., silicone tube often has during transmitting liquid can common silica gel in power demand, such as medical nutrition pipeline Pipe, by the cooperation of silicone tube and peristaltic pump, nutrient solution is injected in vivo, and just because of the characteristic of silicone tube, is sought in conveying Certain resistance can be generated when nutrient solution or other liquid, influences efficiency of transmission, while providing power to extraneous (such as peristaltic pump) There is certain requirement, limits it and use function.
Summary of the invention
The purpose of the present invention is to provide a kind of low transmission resistance silicone tube and preparation method thereof, by silane coupling agent, Dimethicone can form organosilicon macromolecular structure in tube wall and tube body, with 107 glue collective effects, have preferable flat Sliding effect, while there is preferable rebound effect.
In order to achieve the above objectives, the technical solution adopted by the present invention is that: a kind of low transmission resistance silicone tube, in parts by weight Including following component: 80-120 parts of methyl vinyl silicone rubber, 5-15 parts of butadiene rubber, 5-15 parts of carbon black, 2-5 parts of stearic acid, 5-10 parts of nano zine oxide, 10-20 parts of nanometer calcium carbonate, 2-10 parts of plasticizer, 1-5 parts of anti-aging agent, 0.5-2 parts of sulphur, vulcanization 1-3 parts of promotor, 2-5 parts of silane coupling agent, 10-20 parts of dimethicone, 15-25 parts of paraffin oil, 10-20 parts of 107 glue, catalysis 0.1-0.5 parts of agent.
Further, low transmission resistance silicone tube includes following component in parts by weight: methyl vinyl silicone rubber 90- 110 parts, 8-12 parts of butadiene rubber, 7-12 parts of carbon black, 2-5 parts of stearic acid, 5-10 parts of nano zine oxide, nanometer calcium carbonate 12-15 Part, 2-10 parts of plasticizer, 1-5 parts of anti-aging agent, 0.5-2 parts of sulphur, 1-3 parts of vulcanization accelerator, 2-5 parts of silane coupling agent, diformazan 12-15 parts of base silicone oil, 18-22 parts of paraffin oil, 13-17 parts of 107 glue, 0.1-0.5 parts of catalyst.
Further, the anti-aging agent is one of anti-aging agent RD, antioxidant 4010 or antioxidant MB or a variety of mixed Close object.
Further, the vulcanization accelerator is one or both of accelerator DM or vulcanization accelerator TMTD Mixture.
Further, the plasticizer is phenyl alkylsulf class compound.
Further, the silane coupling agent is silane resin acceptor kh-550, silane coupling agent KH-558 or silane coupled One of agent KH-560.
Further, the range of viscosities of 107 glue is ten thousand mm of 1000-102/s
Further, the catalyst is sodium hydroxide or potassium hydroxide.
The present invention also provides a kind of preparation methods of low transmission resistance silicone tube, comprising the following steps:
S1 each raw material) is weighed in parts by weight；
S2 methyl vinyl silicone rubber and butadiene rubber are added in mixer simultaneously), are kneaded 20- at 70 DEG C -90 DEG C 25min obtains mixture；Carbon black is added into mixture, stearic acid, nano zine oxide, nanometer calcium carbonate, plasticizer, prevents always Agent, sulphur, vulcanization accelerator, silane coupling agent, dimethicone, paraffin oil, 107 glue and catalyst, carry out after mixing It is kneaded, is then mediated again with kneader, obtain kneading glue；
S3 glue) will be mediated to be squeezed out with extruder, obtain low transmission resistance silicone tube.
Further, S2) in melting temperature be the mixing time 20-40min at 30-60 DEG C；Kneading temperature is in 160- 200 DEG C, kneading time 1-2h.
Compared with prior art, the beneficial effects of the present invention are:
1. organosilicon macromolecular structure can be formed in tube wall and tube body by silane coupling agent, dimethicone, benefit There is preferable smoothing effect with macromolecular, at the same with highly viscous 107 glue collective effect, make tube wall that there is more compact and smooth Structure, have lesser fluid conveying resistance, fluid transfer efficiency can be improved；
2. collective effect between silicon rubber and silicone macromolecule makes silicone tube have preferably elasticity, is being forced outside There is more preferable rebound effect after compeling.
Specific embodiment
The following is specific embodiments of the present invention, and technical scheme of the present invention will be further described, but the present invention is simultaneously It is not limited to these embodiments.
Embodiment 1
A kind of low transmission resistance silicone tube includes 100 parts of methyl vinyl silicone rubber, butadiene rubber 10 in parts by weight Part, 10 parts of carbon black, 4 parts of stearic acid, 8 parts of nano zine oxide, 15 parts of nanometer calcium carbonate, 7 parts of phenyl alkylsulf, anti-aging agent RD are 3 parts, 1.5 parts of sulphur, accelerator DM be 2 parts, silane resin acceptor kh-550 is 3 parts, 15 parts of dimethicone, paraffin oil 20 Part, 15 parts of 107 glue, 0.3 part of potassium hydroxide, the viscosity of 107 glue are 1000mm2/s。
The preparation method of the low transmission resistance silicone tube, comprising: S1) each raw material is weighed in parts by weight；S2) by methyl second Alkenyl silicon rubber and butadiene rubber are added in mixer simultaneously, are kneaded 25min at 70 DEG C, obtain mixture；Into mixture Carbon black, stearic acid, nano zine oxide, nanometer calcium carbonate, plasticizer, anti-aging agent, sulphur, vulcanization accelerator, silane coupled is added Agent, dimethicone, paraffin oil, 107 glue and catalyst, are kneaded after mixing, and melting temperature is at 40 DEG C, mixing Between be 30min, then mediated again with kneader, obtain kneading glue, kneading temperature is the kneading time 1h at 180 DEG C；S3) Glue will be mediated to be squeezed out with extruder, obtain low transmission resistance silicone tube.
Embodiment 2
A kind of low transmission resistance silicone tube, in parts by weight include 80 parts of methyl vinyl silicone rubber, 5 parts of butadiene rubber, 5 parts of carbon black, 2 parts of stearic acid, 5 parts of nano zine oxide, 10 parts of nanometer calcium carbonate, 2 parts of phenyl alkylsulf, antioxidant 4010 1 Part, 0.5 part of sulphur, vulcanization accelerator TMTD are 1 part, silane coupling agent KH-558 is 2 parts, 10 parts of dimethicone, paraffin oil 15 parts, 10 parts of 107 glue, 0.1 part of sodium hydroxide, the viscosity of 107 glue are 100,000 mm2/s。
The preparation method of the low transmission resistance silicone tube, comprising: S1) each raw material is weighed in parts by weight；S2) by methyl second Alkenyl silicon rubber and butadiene rubber are added in mixer simultaneously, are kneaded 20min at 90 DEG C, obtain mixture；Into mixture Carbon black, stearic acid, nano zine oxide, nanometer calcium carbonate, plasticizer, anti-aging agent, sulphur, vulcanization accelerator, silane coupled is added Agent, dimethicone, paraffin oil, 107 glue and catalyst, are kneaded after mixing, and melting temperature is at 30 DEG C, mixing Between be 40min, then mediated again with kneader, obtain kneading glue, kneading temperature is the kneading time 2h at 160 DEG C；S3) Glue will be mediated to be squeezed out with extruder, obtain low transmission resistance silicone tube.
Embodiment 3
A kind of low transmission resistance silicone tube includes 120 parts of methyl vinyl silicone rubber, butadiene rubber 15 in parts by weight Part, 15 parts of carbon black, 5 parts of stearic acid, 10 parts of nano zine oxide, 20 parts of nanometer calcium carbonate, 10 parts of phenyl alkylsulf, anti-aging agent RD For 2 parts, antioxidant 4010 be 3 parts, 2 parts of sulphur, accelerator DM are 1.5 parts, vulcanization accelerator TMTD is 1.5 parts, silane Coupling agent KH-558 is 2 parts, silane coupling agent KH-560 is 3 parts, 20 parts of dimethicone, 25 parts of paraffin oil, 20 parts of 107 glue, 0.5 part of sodium hydroxide, the viscosity of 107 glue is 50,000 mm2/s。
The preparation method of the low transmission resistance silicone tube, comprising: S1) each raw material is weighed in parts by weight；S2) by methyl second Alkenyl silicon rubber and butadiene rubber are added in mixer simultaneously, are kneaded 22min at 80 DEG C, obtain mixture；Into mixture Carbon black, stearic acid, nano zine oxide, nanometer calcium carbonate, plasticizer, anti-aging agent, sulphur, vulcanization accelerator, silane coupled is added Agent, dimethicone, paraffin oil, 107 glue and catalyst, are kneaded after mixing, and melting temperature is at 60 DEG C, mixing Between be 20min, then mediated again with kneader, obtain kneading glue, kneading temperature is the kneading time 1h at 200 DEG C；S3) Glue will be mediated to be squeezed out with extruder, obtain low transmission resistance silicone tube.
Embodiment 4
A kind of low transmission resistance silicone tube includes 110 parts of methyl vinyl silicone rubber, butadiene rubber 10 in parts by weight Part, 8 parts of carbon black, 3 parts of stearic acid, 6 parts of nano zine oxide, 12 parts of nanometer calcium carbonate, 6 parts of phenyl alkylsulf, anti-aging agent RD 2 Part, antioxidant MB are 2 parts, 1.2 parts of sulphur, accelerator DM are 1 part, vulcanization accelerator TMTD is 0.5 part, silane coupling agent KH-560 is 3.5 parts, 15 parts of dimethicone, 19 parts of paraffin oil, 17 parts of 107 glue, 0.2 part of potassium hydroxide, and the viscosity of 107 glue is 10000 mm2/s。
The preparation method of the low transmission resistance silicone tube, comprising: S1) each raw material is weighed in parts by weight；S2) by methyl second Alkenyl silicon rubber and butadiene rubber are added in mixer simultaneously, are kneaded 24min at 80 DEG C, obtain mixture；Into mixture Carbon black, stearic acid, nano zine oxide, nanometer calcium carbonate, plasticizer, anti-aging agent, sulphur, vulcanization accelerator, silane coupled is added Agent, dimethicone, paraffin oil, 107 glue and catalyst, are kneaded after mixing, and melting temperature is at 45 DEG C, mixing Between be 35min, then mediated again with kneader, obtain kneading glue, kneading temperature is the kneading time 1h at 190 DEG C；S3) Glue will be mediated to be squeezed out with extruder, obtain low transmission resistance silicone tube.
Embodiment 5
A kind of low transmission resistance silicone tube, in parts by weight include 85 parts of methyl vinyl silicone rubber, 7 parts of butadiene rubber, 13 parts of carbon black, 4.5 parts of stearic acid, 8 parts of nano zine oxide, 15.5 parts of nanometer calcium carbonate, 7.5 parts of phenyl alkylsulf, anti-aging agent MB is 3 parts, 1 part of sulphur, accelerator DM are 2.5 parts, silane resin acceptor kh-550 is 1 part, silane coupling agent KH-560 is 2 Part, 13 parts of dimethicone, 22 parts of paraffin oil, 18 parts of 107 glue, 0.4 part of sodium hydroxide, the viscosity of 107 glue are 7.5 ten thousand mm2/s。
The preparation method of the low transmission resistance silicone tube, comprising: S1) each raw material is weighed in parts by weight；S2) by methyl second Alkenyl silicon rubber and butadiene rubber are added in mixer simultaneously, are kneaded 21min at 90 DEG C, obtain mixture；Into mixture Carbon black, stearic acid, nano zine oxide, nanometer calcium carbonate, plasticizer, anti-aging agent, sulphur, vulcanization accelerator, silane coupled is added Agent, dimethicone, paraffin oil, 107 glue and catalyst, are kneaded after mixing, and melting temperature is at 50 DEG C, mixing Between be 25min, then mediated again with kneader, obtain kneading glue, kneading temperature is the kneading time 1.5h at 175 DEG C； S3 glue) will be mediated to be squeezed out with extruder, obtain low transmission resistance silicone tube.
The present invention can form silicone macromolecule knot by silane coupling agent, dimethicone in tube wall and tube body Structure has a preferable smoothing effect using macromolecular, at the same with highly viscous 107 glue collective effect, there is tube wall more tight Close smooth structure has lesser fluid conveying resistance, fluid transfer efficiency can be improved；Silicon rubber and silicone macromolecule Between collective effect, make silicone tube that there is preferably elasticity, there is more preferable rebound effect after by external force pressure.
Specific embodiment described herein is only an example for the spirit of the invention.The neck of technology belonging to the present invention The technical staff in domain can make various modifications or additions to the described embodiments or replace by a similar method In generation, however, it does not deviate from the spirit of the invention or beyond the scope of the appended claims.

Claims (10)

1. a kind of low transmission resistance silicone tube, which is characterized in that in parts by weight include following component: methyl vinyl silicone rubber 80-120 parts, 5-15 parts of butadiene rubber, 5-15 parts of carbon black, 2-5 parts of stearic acid, 5-10 parts of nano zine oxide, nanometer calcium carbonate 10- 20 parts, 2-10 parts of plasticizer, 1-5 parts of anti-aging agent, 0.5-2 parts of sulphur, 1-3 parts of vulcanization accelerator, 2-5 parts of silane coupling agent, two 10-20 parts of methyl-silicone oil, 15-25 parts of paraffin oil, 10-20 parts of 107 glue, 0.1-0.5 parts of catalyst.
2. low transmission resistance silicone tube according to claim 1, which is characterized in that in parts by weight include following component: 90-110 parts of methyl vinyl silicone rubber, 8-12 parts of butadiene rubber, 7-12 parts of carbon black, 2-5 parts of stearic acid, nano zine oxide 5-10 Part, 12-15 parts of nanometer calcium carbonate, 2-10 parts of plasticizer, 1-5 parts of anti-aging agent, 0.5-2 parts of sulphur, 1-3 parts of vulcanization accelerator, silicon 2-5 parts of alkane coupling agent, 12-15 parts of dimethicone, 18-22 parts of paraffin oil, 13-17 parts of 107 glue, 0.1-0.5 parts of catalyst.
3. low transmission resistance silicone tube according to claim 1, which is characterized in that the anti-aging agent is anti-aging agent RD, prevents One of old agent 4010 or antioxidant MB or a variety of mixtures.
4. low transmission resistance silicone tube according to claim 1, which is characterized in that the vulcanization accelerator is that vulcanization promotes The mixture of one or both of agent DM or vulcanization accelerator TMTD.
5. low transmission resistance silicone tube according to claim 1, which is characterized in that the plasticizer is phenyl alkylsulf Class compound.
6. low transmission resistance silicone tube according to claim 1, which is characterized in that the silane coupling agent is silane coupled One of agent KH-550, silane coupling agent KH-558 or silane coupling agent KH-560.
7. low transmission resistance silicone tube according to claim 1, which is characterized in that the range of viscosities of 107 glue is Ten thousand mm of 1000-102/s。
8. low transmission resistance silicone tube according to claim 1, which is characterized in that the catalyst is sodium hydroxide or hydrogen Potassium oxide.
9. according to claim 1 to the preparation method of low transmission resistance silicone tube described in 8 any one, which is characterized in that packet Include following steps:
S1 each raw material) is weighed in parts by weight；
S2 methyl vinyl silicone rubber and butadiene rubber are added in mixer simultaneously), are kneaded 20- at 70 DEG C -90 DEG C 25min obtains mixture；Carbon black is added into mixture, stearic acid, nano zine oxide, nanometer calcium carbonate, plasticizer, prevents always Agent, sulphur, vulcanization accelerator, silane coupling agent, dimethicone, paraffin oil, 107 glue and catalyst, carry out after mixing It is kneaded, is then mediated again with kneader, obtain kneading glue；
S3 glue) will be mediated to be squeezed out with extruder, obtain low transmission resistance silicone tube.
10. the preparation method of low transmission resistance silicone tube according to claim 9, which is characterized in that S2) in melting temperature For at 30-60 DEG C, mixing time 20-40min；Kneading temperature is the kneading time 1-2h at 160-200 DEG C.
CN201910370894.6A 2019-05-06 2019-05-06 A kind of low transmission resistance silicone tube and preparation method thereof Pending CN110041710A (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101735620A (en) * 2009-12-27 2010-06-16 周忠坤 High-temperature resisting methyl vinyl silicone rubber
CN102585514A (en) * 2012-02-28 2012-07-18 上海旭创高分子材料有限公司 Oil-resistant silicon rubber
CN104098911A (en) * 2014-06-26 2014-10-15 穆晓凤 Mixed silicone rubber for seal ring and preparation method
CN104312165A (en) * 2014-09-30 2015-01-28 宁国瑞冠泰设备有限公司 Special high-temperature-resistant oil seal for drying apparatuses and preparation method thereof
CN106243414A (en) * 2016-08-25 2016-12-21 山西佰得拓普工贸有限公司 Conveyer belt reproduces uses macromolecule composite rubber material
CN106751911A (en) * 2017-03-08 2017-05-31 成都硅宝科技股份有限公司 Soft high-strength insulating silicon rubber and preparation method thereof
CN109627783A (en) * 2019-01-04 2019-04-16 东莞市汉华热能科技有限公司 A kind of heat conductive silica gel of Specific gravity and preparation method thereof

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101735620A (en) * 2009-12-27 2010-06-16 周忠坤 High-temperature resisting methyl vinyl silicone rubber
CN102585514A (en) * 2012-02-28 2012-07-18 上海旭创高分子材料有限公司 Oil-resistant silicon rubber
CN104098911A (en) * 2014-06-26 2014-10-15 穆晓凤 Mixed silicone rubber for seal ring and preparation method
CN104312165A (en) * 2014-09-30 2015-01-28 宁国瑞冠泰设备有限公司 Special high-temperature-resistant oil seal for drying apparatuses and preparation method thereof
CN106243414A (en) * 2016-08-25 2016-12-21 山西佰得拓普工贸有限公司 Conveyer belt reproduces uses macromolecule composite rubber material
CN106751911A (en) * 2017-03-08 2017-05-31 成都硅宝科技股份有限公司 Soft high-strength insulating silicon rubber and preparation method thereof
CN109627783A (en) * 2019-01-04 2019-04-16 东莞市汉华热能科技有限公司 A kind of heat conductive silica gel of Specific gravity and preparation method thereof

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Application publication date: 20190723