CN114806179A - Insulating liquid silicone rubber and preparation method and application thereof - Google Patents
Insulating liquid silicone rubber and preparation method and application thereof Download PDFInfo
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- CN114806179A CN114806179A CN202210332340.9A CN202210332340A CN114806179A CN 114806179 A CN114806179 A CN 114806179A CN 202210332340 A CN202210332340 A CN 202210332340A CN 114806179 A CN114806179 A CN 114806179A
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- sericite
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- 229920002379 silicone rubber Polymers 0.000 title claims abstract description 99
- 239000004944 Liquid Silicone Rubber Substances 0.000 title claims abstract description 48
- 238000002360 preparation method Methods 0.000 title claims abstract description 32
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 76
- 239000000945 filler Substances 0.000 claims abstract description 72
- 239000002131 composite material Substances 0.000 claims abstract description 69
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical class [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 57
- -1 polysiloxane Polymers 0.000 claims abstract description 54
- 229920001296 polysiloxane Polymers 0.000 claims abstract description 51
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 37
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims abstract description 37
- 229920002554 vinyl polymer Polymers 0.000 claims abstract description 35
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 30
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000003112 inhibitor Substances 0.000 claims abstract description 10
- 229920001843 polymethylhydrosiloxane Polymers 0.000 claims abstract description 10
- 239000003054 catalyst Substances 0.000 claims abstract description 7
- 229910052697 platinum Inorganic materials 0.000 claims abstract description 7
- 238000003756 stirring Methods 0.000 claims description 34
- 238000010438 heat treatment Methods 0.000 claims description 19
- 239000000843 powder Substances 0.000 claims description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 238000001035 drying Methods 0.000 claims description 13
- 239000000203 mixture Substances 0.000 claims description 13
- 238000000227 grinding Methods 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 9
- 239000000243 solution Substances 0.000 claims description 9
- 239000002244 precipitate Substances 0.000 claims description 8
- 238000002156 mixing Methods 0.000 claims description 6
- 239000000725 suspension Substances 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 4
- 238000007865 diluting Methods 0.000 claims description 3
- 239000011259 mixed solution Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims 1
- 238000001556 precipitation Methods 0.000 claims 1
- 239000004945 silicone rubber Substances 0.000 abstract description 46
- 229920001971 elastomer Polymers 0.000 abstract description 39
- 239000000806 elastomer Substances 0.000 abstract description 38
- 239000003063 flame retardant Substances 0.000 abstract description 24
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 abstract description 19
- 239000011810 insulating material Substances 0.000 abstract description 7
- 229920002125 Sokalan® Polymers 0.000 description 30
- 238000012360 testing method Methods 0.000 description 16
- 239000000463 material Substances 0.000 description 13
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 12
- 230000000052 comparative effect Effects 0.000 description 11
- 230000000694 effects Effects 0.000 description 11
- 239000002994 raw material Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 5
- 238000002485 combustion reaction Methods 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 description 4
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 4
- 238000007259 addition reaction Methods 0.000 description 4
- 238000013329 compounding Methods 0.000 description 4
- 239000006185 dispersion Substances 0.000 description 4
- 239000001257 hydrogen Substances 0.000 description 4
- 229910052739 hydrogen Inorganic materials 0.000 description 4
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 229920001223 polyethylene glycol Polymers 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 230000002829 reductive effect Effects 0.000 description 4
- QYLFHLNFIHBCPR-UHFFFAOYSA-N 1-ethynylcyclohexan-1-ol Chemical compound C#CC1(O)CCCCC1 QYLFHLNFIHBCPR-UHFFFAOYSA-N 0.000 description 3
- 239000002253 acid Substances 0.000 description 3
- 239000008346 aqueous phase Substances 0.000 description 3
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 3
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 3
- 125000005372 silanol group Chemical group 0.000 description 3
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 239000002202 Polyethylene glycol Substances 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- ADCOVFLJGNWWNZ-UHFFFAOYSA-N antimony trioxide Chemical compound O=[Sb]O[Sb]=O ADCOVFLJGNWWNZ-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- KPUWHANPEXNPJT-UHFFFAOYSA-N disiloxane Chemical class [SiH3]O[SiH3] KPUWHANPEXNPJT-UHFFFAOYSA-N 0.000 description 2
- 239000000284 extract Substances 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 229910052736 halogen Inorganic materials 0.000 description 2
- 150000002367 halogens Chemical class 0.000 description 2
- 238000003306 harvesting Methods 0.000 description 2
- 239000010445 mica Substances 0.000 description 2
- 229910052618 mica group Inorganic materials 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000012216 screening Methods 0.000 description 2
- 238000007873 sieving Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- CMQUQOHNANGDOR-UHFFFAOYSA-N 2,3-dibromo-4-(2,4-dibromo-5-hydroxyphenyl)phenol Chemical compound BrC1=C(Br)C(O)=CC=C1C1=CC(O)=C(Br)C=C1Br CMQUQOHNANGDOR-UHFFFAOYSA-N 0.000 description 1
- UGCCFTIRTVRJSZ-UHFFFAOYSA-N 4,5-dibromo-7-oxabicyclo[4.1.0]hepta-1(6),2,4-triene Chemical compound BrC1=CC=C2OC2=C1Br UGCCFTIRTVRJSZ-UHFFFAOYSA-N 0.000 description 1
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 229920002565 Polyethylene Glycol 400 Polymers 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 238000004220 aggregation Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
- 238000005119 centrifugation Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- WHHGLZMJPXIBIX-UHFFFAOYSA-N decabromodiphenyl ether Chemical compound BrC1=C(Br)C(Br)=C(Br)C(Br)=C1OC1=C(Br)C(Br)=C(Br)C(Br)=C1Br WHHGLZMJPXIBIX-UHFFFAOYSA-N 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 239000004205 dimethyl polysiloxane Substances 0.000 description 1
- WNAHIZMDSQCWRP-UHFFFAOYSA-N dodecane-1-thiol Chemical compound CCCCCCCCCCCCS WNAHIZMDSQCWRP-UHFFFAOYSA-N 0.000 description 1
- 239000012777 electrically insulating material Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000005496 eutectics Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 125000003827 glycol group Chemical group 0.000 description 1
- 238000006459 hydrosilylation reaction Methods 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 150000003014 phosphoric acid esters Chemical class 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 description 1
- 239000004584 polyacrylic acid Substances 0.000 description 1
- 229940068918 polyethylene glycol 400 Drugs 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- KVCGISUBCHHTDD-UHFFFAOYSA-M sodium;4-methylbenzenesulfonate Chemical compound [Na+].CC1=CC=C(S([O-])(=O)=O)C=C1 KVCGISUBCHHTDD-UHFFFAOYSA-M 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 229920002725 thermoplastic elastomer Polymers 0.000 description 1
- JOXIMZWYDAKGHI-UHFFFAOYSA-N toluene-4-sulfonic acid Chemical compound CC1=CC=C(S(O)(=O)=O)C=C1 JOXIMZWYDAKGHI-UHFFFAOYSA-N 0.000 description 1
- 150000003623 transition metal compounds Chemical class 0.000 description 1
- 239000004636 vulcanized rubber Substances 0.000 description 1
- 239000002699 waste material Substances 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
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
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 application relates to the technical field of electrical insulating materials, in particular to insulating liquid silicone rubber and a preparation method and application thereof. The insulating liquid silicone rubber comprises a component A and a component B which are separately stored, wherein the component A comprises the following components in parts by weight: 60-80 parts of polysiloxane, 0.5-10 parts of vinyl polysiloxane, 10-20 parts of composite filler and 0.1-0.3 part of platinum catalyst; the component B comprises the following components in parts by weight: 60-80 parts of polysiloxane, 0.5-10 parts of vinyl polysiloxane, 10-20 parts of composite filler, 1-10 parts of polymethylhydrosiloxane and 0.5-1 part of inhibitor. The insulating liquid silicone rubber disclosed by the application utilizes the composite filler mainly compounded by sericite and silicon dioxide surface modified alpha-alumina whiskers, so that the prepared silicone rubber elastomer has excellent flame retardant property and mechanical property, and can be used as an insulating material to be better applied to a power system.
Description
Technical Field
The application relates to the technical field of electrical insulating materials, in particular to insulating liquid silicone rubber and a preparation method and application thereof.
Background
The liquid silicone rubber in the power system generally refers to addition type liquid silicone rubber, and is finished by catalyzing the hydrosilation addition reaction of siloxane containing vinyl and siloxane with multiple Si-H bonds by a group eight transition metal compound such as platinum and the like, and finally a silicone rubber elastomer with polydimethylsiloxane as a main component is formed. The silicon rubber elastomer is used as an important electrical insulating material and has been widely applied to the industries of electronics, electrics, machinery, chemical engineering and the like.
The silicone rubber is flammable, and in recent years, the flame retardant technology of silicone rubber is gradually the focus of attention and research. Early flame retardants for silicone rubber were mainly halogen-containing flame retardants (such as decabromodiphenyl ether, tetrabromobisphenol 6, dibromophenylene ether, chlorinated paraffin, etc.) and phosphorus-containing flame retardants (such as red phosphorus, phosphate esters, etc.), which were limited in use and gradually eliminated because they improved the flame retardant properties of silicone rubber, and they emitted irritating gases containing chlorine or bromine during combustion, which were harmful to the environment and human body.
Therefore, a plurality of scholars at home and abroad use porcelain forming fillers such as aluminum hydroxide, antimony trioxide, mica and the like as flame retardants to carry out flame retardant modification research on the silicone rubber. However, the ceramic-forming filler has a poor flame-retardant effect relative to halogen flame retardants, and as the amount of the ceramic-forming filler added increases, the flame-retardant performance of the silicone rubber can be improved, but the mechanical properties of the silicone rubber are also affected. Therefore, the development of a silicone rubber modified by a porcelain-forming filler and having excellent flame retardant property and mechanical property is a technical difficulty which needs to be solved urgently at present.
Disclosure of Invention
The application provides an insulating liquid silicone rubber and a preparation method and application thereof, wherein the insulating liquid silicone rubber is prepared by compounding a composite filler mainly prepared by sericite and silicon dioxide surface modified alpha-alumina whiskers, so that a silicone rubber elastomer prepared from the insulating liquid silicone rubber has excellent flame retardant property and mechanical property.
In a first aspect, the present application provides an insulating liquid silicone rubber comprising separately stored a component a and B component;
the component A comprises the following components in parts by weight: 60-80 parts of polysiloxane, 0.5-10 parts of vinyl polysiloxane, 10-20 parts of composite filler and 0.1-0.3 part of platinum catalyst;
the component B comprises the following components in parts by weight: 60-80 parts of polysiloxane, 0.5-10 parts of vinyl polysiloxane, 10-20 parts of composite filler, 1-10 parts of polymethylhydrosiloxane and 0.5-1 part of inhibitor;
wherein the composite filler is mainly compounded by sericite and silicon dioxide surface modified alpha-alumina whiskers.
By adopting the technical scheme, the double-component AB adhesive is a double-component AB adhesive, and polysiloxane (dimethyl silicone oil) in the two components is used as a basic reagent to dilute vinyl polysiloxane; according to the application, the component B is also added with the vinyl polysiloxane, so that the influence on the ratio of the vinyl polysiloxane component in the component A when the component B is added into the component A can be reduced, the component A and the component B can be promoted to be rapidly mixed uniformly, and the smooth addition reaction of a system is ensured; because the component B simultaneously contains reaction raw materials (vinyl polysiloxane and polymethylhydrosiloxane), in order to avoid the self-addition reaction of the component B, a set amount of inhibitor is also added into the component B, the concentration of the inhibitor is correspondingly reduced when the component A and the component B are mixed, the catalyst in the component A can promote the mixed materials to accelerate the addition reaction, and after the reaction is finished, the inhibitor can also ensure the stability of the system, so that the prepared silicone rubber elastomer has good mechanical property and aging resistance.
On the basis, the filler adopted by the application is mainly compounded by sericite and silicon dioxide surface modified alpha-alumina whiskers, and compared with the condition that the sericite and the silicon dioxide surface modified alpha-alumina whiskers are independently added, the mechanical properties such as tensile strength, elongation at break and the like of the base material can be effectively improved in a compounding mode.
On the basis, if the silicon rubber substrate burns, the sericite in the composite filler can form a compact eutectic ceramic layer with the silicon dioxide which is the combustion product of the substrate and the modified alpha-alumina whisker surface modified silicon dioxide, so that the silicon rubber elastomer has good flame retardant property; meanwhile, the alpha-alumina whiskers in the composite filler enable the silicone rubber elastomer to have a good thermal protection effect, so that heat generated by base material combustion is prevented from diffusing to the periphery of flame to cause further combustion, and the base material can still keep good structural stability during combustion.
Therefore, the silicone rubber elastomer prepared by the liquid silicone rubber prepared by the method has excellent flame retardant property and thermal protection property, and also has excellent mechanical strength, so that the silicone rubber elastomer can be used as an insulating material to be well applied to a power system.
Preferably, the preparation method of the composite filler comprises the following steps:
and uniformly dispersing sericite in water, adding the silicon dioxide surface modified alpha-alumina whisker while stirring, uniformly mixing, and drying and grinding the prepared mixed solution to obtain the composite filler.
By adopting the technical scheme, sericite is uniformly dispersed in water to promote more hydroxyl groups to be attached to the surface of the sericite, and then silicon dioxide surface modified alpha-alumina whiskers are added to ensure that silanol groups on the surface of the alpha-alumina whiskers can fully form hydrogen bonds with the hydroxyl groups on the surface of the sericite to bond, so that the sericite and the alpha-alumina whiskers are compounded; finally, the composite filler obtained by drying and grinding has uniform grain diameter and excellent toughening, reinforcing and flame-retardant thermal protection effects.
Preferably, the sericite is PEG-PMAH-PAA modified sericite.
By adopting the technical scheme, the PEG-PMAH-PAA is polyethylene glycol maleic anhydride monoester-polyacrylic acid, is a macromolecular surface modifier, and the-COOH of the PEG-PMAH-PAA can be matched with-OH, -NH-, -NH on the surface of sericite 2 Active hydrogen of the groups is bonded, and steric hindrance repulsion and hydrophilicity of the PEG chain segment effectively control aggregation of sericite during dispersion in water. In the application, the modified sericite can be rapidly dispersed in water under the action of carboxyl, wherein the hydroxyl of a polyethylene glycol chain segment can be modified with the surface of silicon dioxideAnd the alpha-alumina whisker bonding further increases the composite effect of the sericite and the silicon dioxide surface modified alpha-alumina whisker.
Preferably, the preparation method of the PEG-PMAH-PAA modified sericite comprises the following steps:
diluting PEG-PMAH-PAA with water, adding sericite, filtering and drying after the sericite is uniformly dispersed, then placing in infrared rays, stirring and carrying out intermittent heating treatment, and cooling to obtain the modified sericite.
By adopting the technical scheme, the PEG-PMAH-PAA is firstly diluted, which is beneficial to the rapid dispersion of the sericite, so that-OH, -NH-, -NH on the surface of the sericite 2 Active hydrogen of the groups is bonded with carboxyl of PEG-PMAH-PAA, so that the PEG-PMAH-PAA is synchronously collected under the drive of sericite, and then intermittent heating treatment is carried out by adopting infrared rays, wherein the infrared rays are helpful for quick heat absorption of the PEG-PMAH-PAA to improve the fluidity of the PEG-PMAH-PAA, and the intermittent heating can ensure that the flowing distance of the PEG-PMAH-PAA is limited, so that the PEG-PMAH-PAA is more uniformly combined on the surface of the sericite through cooling and shaping after multiple softening.
Preferably, the addition amount of the PEG-PMAH-PAA is 5-10mL/L, and the addition amount of the sericite is 200-300 g/L.
By adopting the technical scheme, the excessive addition amount of the PEG-PMAH-PAA causes waste of raw materials, the excessive addition amount of the PEG-PMAH-PAA causes difficulty in completely modifying the sericite, and the addition amount of the sericite is favorable for quick bonding of the PEG-PMAH-PAA and the sericite due to good fluidity of the sericite dispersed in water.
Preferably, the preparation method of the silicon dioxide surface modified alpha-alumina whisker comprises the following steps:
adding the alpha-alumina whisker into a water-phase colloidal solution of silicon dioxide to form a colloidal suspension of the alpha-alumina whisker with the modified silicon dioxide surface, standing, centrifuging to obtain precipitate, drying the precipitate, and grinding into powder to obtain the silicon dioxide surface modified alpha-alumina whisker.
Through adopting above-mentioned technical scheme, this application adopts silicon dioxide's aqueous phase colloidal solution to carry out surface modification to alpha-alumina whisker, and the hydroxyl and the adsorbed moisture on alpha-alumina whisker surface and the silicon dioxide reaction of dispersion in colloidal solution leave the silanol group that combines on the whisker surface from this, adopt centrifugation results to deposit after static processing, and it is for stirring the mode of deposiing, and this application can effectively reduce the structural wear of agitated vessel to modified alpha-alumina whisker, and then impels silanol group stable bonding on the whisker surface.
Preferably, the weight ratio of the sericite to the silicon dioxide surface modified alpha-alumina whiskers in the composite filler is 1 (0.8-1.2).
By adopting the technical scheme, in the composite filler, the flame retardant effect of the silicone rubber elastomer is increased along with the increase of the percentage of sericite, but the mechanical property of the silicone rubber elastomer is approximately in the trend of increasing firstly and then decreasing; therefore, the weight ratio of the sericite powder to the silica surface modified alpha-alumina whiskers influences the final effect of the composite filler, and the composite filler prepared according to the weight ratio is further preferable.
Preferably, the viscosity at 25 ℃ of the vinyl polysiloxane is 1000- 2 The molar amount of vinyl groups is 0.3 to 0.8%.
By adopting the technical scheme, the fluidity of the vinyl polysiloxane is reduced along with the increase of the viscosity, the components in the raw materials are difficult to uniformly disperse, the reaction is influenced, and the tear strength of the silicone rubber elastomer is influenced when the viscosity is lower; on the basis, the vinyl content also has an influence on the mechanical properties of the silicone rubber elastomer; with the increase of the vinyl content, the hardness of the silicone rubber elastomer is correspondingly increased, and the tearing strength and the tensile strength are increased and then decreased; therefore, the inventor finds that the silicone rubber elastomer prepared by the vinyl polysiloxane has more stable performance and more excellent mechanical properties in the component proportion of the application.
In a second aspect, the present application provides a method for preparing an insulating liquid silicone rubber, comprising the steps of:
uniformly stirring polysiloxane and vinyl polysiloxane, heating to 80-85 ℃, adding a composite filler and a platinum catalyst, and continuously stirring until the mixture is uniformly mixed to obtain a component A;
stirring polysiloxane and vinyl polysiloxane uniformly, heating to 80-85 ℃, adding the composite filler, continuously stirring until the mixture is uniform, cooling to room temperature, sequentially adding polymethyl hydrogen siloxane and an inhibitor, and continuously stirring until the mixture is uniform to obtain a component B;
and (3) storing the component A and the component B separately to obtain the two-component insulating liquid silicone rubber.
By adopting the technical scheme, when the component A is prepared, the polysiloxane and the vinyl polysiloxane are heated and then added with the composite filler, the flowability of the raw materials can be increased based on high temperature, the composite filler is favorable for fast dispersion, and simultaneously, the high temperature can accelerate the discharge of bubbles in the mixed liquid and reduce the influence of the bubbles on the performance of the silicone rubber; when the component B is prepared, the temperature is raised firstly to promote the composite filler to be uniformly mixed, then the temperature is reduced to room temperature, and the polymethylhydrosiloxane and the inhibitor are added, so that the component stability of the component B is ensured; and finally, the component A and the component B are respectively stored, so that the stability of the components of the liquid silicone rubber is ensured, and the shelf life of the product is prolonged. The preparation method is simple, the mixing effect is good, and the prepared insulating liquid silicone rubber has a longer shelf life, so that the prepared silicone rubber elastomer has excellent flame-retardant thermal protection performance and mechanical performance.
In a third aspect, the present application provides the use of an insulating liquid silicone rubber in the preparation of a silicone rubber elastomer.
By adopting the technical scheme, when the insulating liquid silicone rubber is applied, the component A and the component B can be rapidly and uniformly dispersed due to a large amount of same raw materials, and the cured and formed silicone rubber elastomer has excellent flame-retardant thermal protection performance and mechanical performance.
In summary, the present application has the following beneficial effects:
1. the insulating liquid silicone rubber adopts the composite filler compounded by sericite powder, silicon dioxide surface modified alpha-alumina whiskers and polyvinyl alcohol, and the correspondingly prepared silicone rubber elastomer has excellent flame retardant property and thermal protection property, has excellent mechanical strength and can be used as an insulating material to be better applied to an electric power system.
2. When the composite filler in the insulating liquid silicone rubber is prepared, sericite powder is dispersed in water, then silicon dioxide surface modification alpha-alumina whisker is added for compounding, and the sericite powder is subjected to surface modification by PEG-PMAH-PAA, so that the prepared composite material can further improve the flame-retardant thermal protection performance and the mechanical performance of the silicone rubber.
3. The insulating liquid silicone rubber is prepared by designing specific preparation steps according to the batching characteristics of the component A and the component B respectively, and finally, the components which are the same in quantity are utilized to promote the raw materials to be dispersed uniformly, so that the insulating liquid silicone rubber has the characteristics of convenience in operation and excellent mixing effect.
Detailed Description
The insulating liquid silicone rubber provided by the application is a bi-component liquid silicone rubber, specifically comprises a component A and a component B, and utilizes a composite filler compounded by sericite powder, silicon dioxide surface modified alpha-alumina whiskers and polyvinyl alcohol, so that the prepared silicone rubber elastomer has excellent flame-retardant thermal protection performance and mechanical performance.
In order to prolong the shelf life of the insulating liquid silicone rubber, the component A and the component B are respectively prepared and stored separately. When the adhesive is used, the component A and the component B are mixed and then placed into an existing injection machine, the component A and the component B can be rapidly and uniformly dispersed due to the fact that a large number of same raw materials exist, then the adhesive is injected into a forming die through the injection machine, and then the adhesive is heated and cured for forming. Specifically, the curing is carried out for 20-40s within the temperature range of 120-150 ℃, and the specific curing temperature and time can be properly adjusted according to the molded product, so as to finally obtain the corresponding silicone rubber elastomer. The silicone rubber elastomer can be used as an insulating material and well applied to an electric power system, for example, as an outer insulating sheath of a mutual inductor applied to substations of national power grids and southern power grids.
In the insulating liquid silicone rubber, the component A comprises the following components in parts by weight: 60-80 parts of polysiloxane, 0.5-10 parts of vinyl polysiloxane, 10-30 parts of composite filler and 0.1-0.3 part of platinum catalyst; the component B comprises the following components in parts by weight: 60-80 parts of polysiloxane, 0.5-10 parts of vinyl polysiloxane, 1-10 parts of polymethylhydrosiloxane and 2-4 parts of inhibitor; the composite filler is mainly compounded by sericite and silicon dioxide surface modified alpha-alumina whiskers. Other auxiliary agents such as pigments, age resisters, uvioresistant agents and the like can be added into the component A and the component B according to requirements.
The above component materials except the composite filler can be commercially available products, and the materials with the following parameters are selected for the test, but are not the only available parameters.
Table-raw material and its parameter table
Preparation example
1. Preparation of PEG-PMAH-PAA
The PEG-PMAH-PAA is prepared by the following steps:
a three-necked flask was charged with a solution of 100mmol of Maleic Anhydride (MAH) and 110mmol of polyethylene glycol 400 (PEG 400) in toluene (150mL), and N 2 To protect it, 1mmol of sodium p-toluenesulfonate (PTSA) was added with stirring and reacted at 105 ℃ for 4h (orange clear solution). Extracting with ether for 3-5 times, combining the extracts, and drying to obtain orange viscous liquid PEG 400-PMAH.
PEG400-PMAH 100mmol, Acrylic Acid (AA) 500mmol and a little (2 drops) dodecylmercaptan in toluene (150mL) were added to a three-necked flask, and a (10 mmol Azobisisobutyronitrile (AIBN)) solution in toluene (20mL) was added dropwise (1 drop/s) at 65 ℃ with stirring, and the reaction was carried out for 2 hours. Evaporating toluene, extracting with ether for 3-5 times, combining the extracts, and drying to obtain dark yellow viscous liquid, namely PEG-PMAH-PAA. Where the average Mn =3050 and the average Mw = 3979.
2. Preparation example of PEG-PMAH-PAA modified sericite
A PEG-PMAH-PAA modified sericite, which is marked as modified sericite-1, and the preparation method comprises the following steps:
diluting PEG-PMAH-PAA with water, adding sericite, wherein the addition amount of the PEG-PMAH-PAA is 5-10mL/L, the addition amount of the sericite is 200-300g/L, 8mL/L and 250g/L are taken as examples in the preparation example, after the sericite is uniformly dispersed, filtering to obtain a wet mica material, drying in a 65 ℃ oven to dry moisture, then placing the material in a stirrer irradiated with infrared rays, stirring and intermittently heating, specifically stopping for 10s after 30s of infrared ray irradiation each time, circulating for 5 times, cooling, and grinding through a 600-mesh screen to obtain the modified sericite-1.
The PEG-PMAH-PAA modified sericite is marked as modified sericite-2, and the preparation method thereof is different from the modified sericite a in that the PEG-PMAH-PAA modified sericite is prepared by directly grinding and sieving the modified sericite b after filtering and drying without infrared intermittent heating treatment.
3. Preparation of silica surface-modified alpha-alumina whiskers
A silicon dioxide surface modified alpha-alumina whisker, which is marked as modified alumina whisker-1, and the preparation method comprises the following steps:
adding alpha-alumina whiskers into an aqueous phase colloidal solution of silicon dioxide to form a colloidal suspension of the alpha-alumina whiskers with the surface modified by the silicon dioxide, wherein the content of the alpha-alumina whiskers is 20wt% of the colloidal suspension, the content of the silicon dioxide is 30wt% of the total weight of the aqueous phase colloidal solution, standing for 15min, centrifuging for 15min in a 4000r/min centrifuge, washing with clear water, centrifuging again, discarding the supernatant, repeatedly washing for 2 times, harvesting the precipitate, placing the precipitate in oven-dried water, grinding into powder, and screening with a 600-mesh screen to obtain the silicon dioxide surface modified alpha-alumina whiskers.
A silicon dioxide surface modified alpha-alumina whisker, which is marked as modified alumina whisker-2, and the preparation method thereof is different from the modified alumina whisker-1 in that the modified alumina whisker-2 is not statically treated, namely the modified alumina whisker-2 is prepared by directly centrifuging, cleaning, grinding and sieving colloidal suspension.
4. Preparation example of composite Filler
A composite filler, denoted composite filler a, is prepared by a process comprising the steps of:
uniformly dispersing sericite powder in water according to the weight ratio of 1:3, wherein the weight of the water can be adjusted according to needs, particularly, the sericite powder still has good fluidity after being dispersed, then adding modified alumina whisker-1 while stirring, uniformly mixing, wherein the weight ratio of the sericite to the modified alumina whisker-1 is 1:1, centrifuging the prepared mixed solution for 15min at 2500r/min, harvesting precipitates, placing the precipitates in a drying oven at 65 ℃ for drying water, then grinding, and screening by a 200-mesh screen to obtain the composite filler a.
A composite filler, which is marked as composite filler b, and the preparation method of the composite filler is different from that of the composite filler a in that sericite powder is replaced by modified sericite-1.
A composite filler, which is marked as a composite filler c, and the preparation method of the composite filler a is different from that of the composite filler a in that sericite powder is replaced by modified sericite-2.
A composite filler, which is marked as a composite filler d, and the preparation method of the composite filler is different from that of the composite filler a in that sericite powder is replaced by modified sericite-1, and modified alumina whisker-1 is replaced by modified alumina whisker-2.
The present application will be described in further detail with reference to examples and comparative examples.
Examples
Example 1
An insulating liquid silicone rubber comprises a component A and a component B, and the preparation method comprises the following steps:
uniformly stirring 75kg of polysiloxane and 5kg of vinyl polysiloxane, heating to 80 ℃, wherein the heating temperature can fluctuate within the range of 80-85 ℃, and then adding 15kg of composite filler a and 0.2kg of chloroplatinic acid, and continuously stirring until the components are uniformly mixed to obtain a component A;
uniformly stirring 75kg of polysiloxane and 5kg of vinyl polysiloxane, heating to 80 ℃, wherein the heating temperature can fluctuate within the range of 80-85 ℃, adding 15kg of composite filler a, continuously stirring until the mixture is uniformly mixed, cooling to room temperature (25 ℃), sequentially adding 8kg of polymethylhydrosiloxane and 0.8kg of 1-ethynyl-1-cyclohexanol, and continuously stirring until the mixture is uniformly mixed to obtain a component B;
and thirdly, storing the component A and the component B separately to obtain the double-component insulating liquid silicone rubber.
The preparation method of the silicone rubber elastomer by using the insulating liquid silicone rubber comprises the following steps:
taking the component A and the component B according to the weight ratio of 1:1, mixing, putting into an injection machine, injecting rubber materials into a forming mold through the injection machine, heating to 150 ℃, curing for 30s, and demolding to obtain the silicone rubber elastomer.
Examples 2 to 4
Examples 2-4 the components and amounts of component a and component B were adjusted based on example 1, and see table two below for specific adjustments.
TABLE II composition tables for examples 1-4 (unit: kg)
Examples 5 to 7
Examples 5 to 7 composite filler a was prepared in addition to example 1. In example 5, the composite filler a is replaced with the composite filler b, in example 6, the composite filler a is replaced with the composite filler c, and in example 7, the composite filler a is replaced with the composite filler d.
Examples 8 to 11
Examples 8 to 11 in addition to example 5, the weight ratio of modified sericite-1 (PEG-PMAH-PAA modified sericite) to modified alumina whisker-1 (silica surface modified α -alumina whisker) in the composite filler b was adjusted, and specific adjustment was made as shown in table three below.
TABLE III EXAMPLES 5, 8-11 weight ratio of modified sericite-1 to modified alumina whisker-1 in the corresponding composite fillers b
Examples 12 to 15
Examples 12-15 based on example 5, vinyl silicone was adjusted, see table five below.
TABLE V parameter tables for vinyl polysiloxanes for examples 5, 12 to 15
Comparative example
Comparative example 1
An insulating liquid silicone rubber comprises a component A and a component B, and the preparation method comprises the following steps:
uniformly stirring 75kg of polysiloxane and 5kg of vinyl polysiloxane, heating to 80 ℃, and then adding 7.5kg of sericite powder, 7.5kg of modified alumina whisker-1 and 0.2kg of chloroplatinic acid, and continuously stirring until the components are uniformly mixed to obtain a component A;
uniformly stirring 75kg of polysiloxane and 5kg of vinyl polysiloxane, heating to 80 ℃, adding 7.5kg of sericite powder and 7.5kg of modified alumina whisker-1, continuously stirring until the mixture is uniformly mixed, cooling to room temperature (25 ℃), sequentially adding 8kg of polymethylhydrosiloxane and 0.8kg of 1-ethynyl-1-cyclohexanol, and continuously stirring until the mixture is uniformly mixed to obtain a component B;
and thirdly, storing the component A and the component B separately to obtain the double-component insulating liquid silicone rubber.
The corresponding silicone rubber elastomer was prepared using the above-described insulating liquid silicone rubber in the same manner as in example 1.
Comparative example 2
An insulating liquid silicone rubber comprises a component A and a component B, and the preparation method comprises the following steps:
uniformly stirring 75kg of polysiloxane and 5kg of vinyl polysiloxane, heating to 80 ℃, and then adding 7.5kg of modified sericite-1, 7.5kg of modified alumina whisker-1 and 0.2kg of chloroplatinic acid, and continuously stirring until the components are uniformly mixed to obtain a component A;
uniformly stirring 75kg of polysiloxane and 5kg of vinyl polysiloxane, heating to 80 ℃, adding 7.5kg of modified sericite-1 and 7.5kg of modified alumina whisker-1, continuously stirring until the mixture is uniformly mixed, cooling to room temperature (25 ℃), sequentially adding 8kg of polymethylhydrosiloxane and 0.8kg of 1-ethynyl-1-cyclohexanol, and continuously stirring until the mixture is uniformly mixed to obtain a component B;
and thirdly, storing the component A and the component B separately to obtain the double-component insulating liquid silicone rubber.
The corresponding silicone rubber elastomer was prepared using the above-described insulating liquid silicone rubber in the same manner as in example 1.
Performance test
The silicone rubber elastomers obtained in examples 1 to 15 of the present application and comparative examples 1 to 2 were subjected to the following performance tests as test samples, and the test results are shown in the following table six.
Firstly, detecting flame retardant performance-tracking resistance performance
The silicone rubber elastomers prepared in examples 1 to 15 and comparative examples 1 to 2 were used as test samples, and the test was carried out by referring to method 1 of the test method for evaluating tracking resistance and erosion resistance of an electrically insulating material used under the severe environmental conditions of GB/T6553-2014, which is the national standard, by a constant tracking voltage method, wherein the thickness of the test sample was 6mm, a contaminated liquid was dropped while applying a voltage of 6.0kV to both ends of the test sample, the flow rate of the contaminated liquid was 0.9mL/min, and the time required for burning through the test sample was tested. If the required time exceeds 360min (6 h), the tracking resistance rating is considered to be 1A 6.0.
② detection of thermal protection performance-thermal residual rate
The silicone rubber elastomers prepared in examples 1 to 15 and comparative examples 1 to 2 were used as samples, the samples were placed in a muffle furnace at 900 ℃ and baked for 10min, the baking was performed in the air, and the thermal residual rate (%) = residual weight/sample weight 100% of the samples was counted; the higher the thermal residue rate, the better the thermal protection effect of the sample.
Thirdly, detecting the mechanical property, namely tensile strength and elongation at break
The silicone rubber elastomers prepared in examples 1-15 and comparative examples 1-2 were used as test specimens, and the test length was 25. + -. 0.5mm, the tensile rate was 500mm/min, and the tensile strength and elongation at break were measured by using dumbbell-shaped 1-type test specimens according to the method of GB/T528-2009 vulcanized rubber or thermoplastic rubber tensile stress strain property determination of the national standard.
TABLE VI test results of the silicone rubber elastomers obtained in examples 1 to 18 and comparative examples 1 to 2
In combination with table six, when the detection results of example 1 and comparative example 1, and example 5 and comparative example 2 are compared, compared with the method in which the same amount of sericite powder and silica surface modified alpha-alumina whiskers are directly and sequentially added to the base material to modify the base material, or the same amount of PEG-PMAH-PAA modified sericite powder and silica surface modified alpha-alumina whiskers are directly and sequentially added to the base material to modify the base material, the silicone rubber elastomer prepared in the form of the composite filler has longer burning time, higher thermal residual rate, and higher tensile strength and elongation at break. Therefore, the silicone rubber elastomer prepared by the insulating liquid silicone rubber correspondingly has more excellent flame retardant property, thermal protection property and mechanical property, and has good application prospect in an electric power system.
Comparing the test results of examples 1 to 4, it can be seen that the puncture time of example 1 is longer than that of examples 2 and 3, the tensile strength and the elongation at break are superior to those of example 4, and the overall performance of example 1 is significantly superior to those of examples 2 to 4 from the viewpoint of the overall effect, and thus it is considered as a preferred example.
Examples 5 to 7 are composite filler modified liquid silicone rubbers prepared by modifying the composite filler based on example 1, specifically, by compounding PEG-PMAH-PAA modified sericite and silica surface modified alpha-alumina whiskers, and the silicone rubber elastomers prepared therefrom have more excellent thermal protective properties and mechanical properties, wherein the composite filler compounded by modified sericite-1 and modified silica whisker-1 is further preferred, so that example 5 is taken as a further preferred example in the present application.
Examples 8 to 11 are tests based on example 5, and when the test results of examples 5 and 8 to 11 are compared, the properties of the silicone rubber elastomer of the present application are changed by the change of the components in the composite filler, and the mechanical properties of the silicone rubber elastomer tend to increase and decrease with the increase of the sericite ratio. Among them, the mechanical properties of the silicone rubber elastomer are preferable when the weight ratio is 1 (0.8 to 1.2), and a weight ratio of 1:1 is more preferable.
Combining the test results of examples 12-15 and example 5, it can be seen that both the viscosity and the ethylene molar amount of the vinyl polysiloxane can have an effect on the mechanical properties of the silicone rubber elastomer, and it is further preferred that the viscosity at 25 ℃ is 1000-3000mm 2 Vinyl polysiloxane with vinyl molar weight of 0.3-0.8% per s.
The present embodiment is only for explaining the present application, and it is not limited to the present application, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present application.
Claims (10)
1. An insulating liquid silicone rubber comprising separately stored A-component and B-component,
the component A comprises the following components in parts by weight: 60-80 parts of polysiloxane, 0.5-10 parts of vinyl polysiloxane, 10-20 parts of composite filler and 0.1-0.3 part of platinum catalyst;
the component B comprises the following components in parts by weight: 60-80 parts of polysiloxane, 0.5-10 parts of vinyl polysiloxane, 10-20 parts of composite filler, 1-10 parts of polymethylhydrosiloxane and 0.5-1 part of inhibitor;
wherein the composite filler is mainly compounded by sericite and silicon dioxide surface modified alpha-alumina whiskers.
2. The insulating liquid silicone rubber according to claim 1, wherein: the preparation method of the composite filler comprises the following steps:
and uniformly dispersing sericite in water, adding the silicon dioxide surface modified alpha-alumina whisker while stirring, uniformly mixing, and carrying out centrifugal precipitation, drying and grinding on the prepared mixed solution to obtain the composite filler.
3. The insulating liquid silicone rubber according to claim 2, wherein: the sericite is PEG-PMAH-PAA modified sericite.
4. The insulating liquid silicone rubber according to claim 3, wherein: the preparation method of the PEG-PMAH-PAA modified sericite comprises the following steps:
diluting PEG-PMAH-PAA with water, adding sericite, filtering and drying after the sericite is uniformly dispersed, then placing in infrared rays, stirring and carrying out intermittent heating treatment, and cooling to obtain the modified sericite.
5. The insulating liquid silicone rubber according to claim 4, wherein the amount of PEG-PMAH-PAA added is 5-10mL/L, and the amount of sericite added is 200-300 g/L.
6. The insulating liquid silicone rubber according to claim 2, wherein the preparation method of the silica surface-modified α -alumina whiskers comprises the steps of:
adding the alpha-alumina whisker into a water-phase colloidal solution of silicon dioxide to form a colloidal suspension of the alpha-alumina whisker with the modified silicon dioxide surface, standing, centrifuging to obtain precipitate, drying the precipitate, and grinding into powder to obtain the silicon dioxide surface modified alpha-alumina whisker.
7. The insulating liquid silicone rubber according to claim 2, characterized in that: the weight ratio of sericite to silicon dioxide surface modified alpha-alumina whisker in the composite filler is 1 (0.8-1.2).
8. The insulating liquid silicone rubber according to claim 1, wherein: the viscosity of the vinyl polysiloxane at 25 ℃ is 1000-3000mm 2 The molar amount of vinyl groups is 0.3 to 0.8%.
9. The method for producing an insulating liquid silicone rubber according to any one of claims 1 to 8, characterized by comprising the steps of:
uniformly stirring polysiloxane and vinyl polysiloxane, heating to 80-85 ℃, adding a composite filler and a platinum catalyst, and continuously stirring until the mixture is uniformly mixed to obtain a component A;
uniformly stirring polysiloxane and vinyl polysiloxane, heating to 80-85 ℃, adding the composite filler, continuously stirring until the mixture is uniformly mixed, cooling to room temperature, sequentially adding polymethylhydrosiloxane and inhibitor, and continuously stirring until the mixture is uniformly mixed to obtain a component B;
and (3) storing the component A and the component B separately to obtain the two-component insulating liquid silicone rubber.
10. Use of the insulating liquid silicone rubber according to any one of claims 1 to 8 for the preparation of silicone elastomers.
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Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5880199A (en) * | 1996-05-24 | 1999-03-09 | Dow Corning Toray Silicone Co., Ltd. | Liquid silicone rubber composition and method for the preparation thereof |
| CN1348478A (en) * | 1998-12-22 | 2002-05-08 | 罗狄亚化学公司 | Method for preparing a silica suspension in a silicone matrix crosslinkable by polycondensation to form elastomers |
| JP2004067938A (en) * | 2002-08-08 | 2004-03-04 | Dainippon Printing Co Ltd | Addition curing type silicone rubber composition,blanket for offset printing, offset printing method and offset printed artticle |
| JP2011001424A (en) * | 2009-06-17 | 2011-01-06 | Hitachi Industrial Equipment Systems Co Ltd | Insulated casting resin for electric appliance, and high voltage electric appliance using the same |
| CN103509347A (en) * | 2012-06-21 | 2014-01-15 | 日东电工株式会社 | Silicone resin composition, semi-cured material sheet, producing method of silicone cured material, light emitting diode device, and producing method thereof |
| CN104804705A (en) * | 2015-05-06 | 2015-07-29 | 成都拓利化工实业有限公司 | Low release quantity additive halogen-free flame-retardant heat-conduction organic silicon pouring sealant and preparation method thereof |
| CN105358630A (en) * | 2012-05-07 | 2016-02-24 | 纽卡尔有限公司 | Silica-surface modified alpha-alumina whiskers and uses thereof |
| CN106147602A (en) * | 2016-07-27 | 2016-11-23 | 天津凯华绝缘材料股份有限公司 | A kind of electronic package silicon composition and preparation method thereof |
| GB201621650D0 (en) * | 2016-12-16 | 2017-02-01 | Formformform Ltd | Silicone elastomer composition |
| CN106750793A (en) * | 2016-12-19 | 2017-05-31 | 国网山东省电力公司东阿县供电公司 | Agriculture distribution environmentally friendly insulated cable material and preparation method thereof |
| CN106751899A (en) * | 2016-12-14 | 2017-05-31 | 东至绿洲环保化工有限公司 | A kind of composite type antioxidant silicon rubber |
| CN107793992A (en) * | 2017-11-01 | 2018-03-13 | 杭州之江有机硅化工有限公司 | A kind of additional organosilicon casting glue and preparation method thereof |
| CN110016231A (en) * | 2019-04-26 | 2019-07-16 | 常州市沃科科技有限公司 | Fire-resistant silicon rubber and preparation method thereof, conducting wire |
| CN111020871A (en) * | 2019-12-31 | 2020-04-17 | 苏州卫生职业技术学院 | Nanofiber membrane for enzyme immobilization and preparation method thereof |
| CN112500706A (en) * | 2020-11-23 | 2021-03-16 | 中广核高新核材科技（苏州）有限公司 | Neutron shielding fireproof silicone adhesive and preparation method thereof |
| CN112759851A (en) * | 2021-01-20 | 2021-05-07 | 江苏中信国安新材料有限公司 | Flame-retardant polystyrene composite material and preparation method and application thereof |
| CN112778875A (en) * | 2020-12-31 | 2021-05-11 | 滁州圣好材料科技有限公司 | Water-based alkali-resistant primer for exterior wall and manufacturing method thereof |
| CN114223094A (en) * | 2020-04-13 | 2022-03-22 | 旭化成株式会社 | Composite single-layer chemically cross-linked separator |
-
2022
- 2022-03-31 CN CN202210332340.9A patent/CN114806179A/en active Pending
Patent Citations (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5880199A (en) * | 1996-05-24 | 1999-03-09 | Dow Corning Toray Silicone Co., Ltd. | Liquid silicone rubber composition and method for the preparation thereof |
| CN1348478A (en) * | 1998-12-22 | 2002-05-08 | 罗狄亚化学公司 | Method for preparing a silica suspension in a silicone matrix crosslinkable by polycondensation to form elastomers |
| JP2004067938A (en) * | 2002-08-08 | 2004-03-04 | Dainippon Printing Co Ltd | Addition curing type silicone rubber composition,blanket for offset printing, offset printing method and offset printed artticle |
| JP2011001424A (en) * | 2009-06-17 | 2011-01-06 | Hitachi Industrial Equipment Systems Co Ltd | Insulated casting resin for electric appliance, and high voltage electric appliance using the same |
| CN105358630A (en) * | 2012-05-07 | 2016-02-24 | 纽卡尔有限公司 | Silica-surface modified alpha-alumina whiskers and uses thereof |
| CN103509347A (en) * | 2012-06-21 | 2014-01-15 | 日东电工株式会社 | Silicone resin composition, semi-cured material sheet, producing method of silicone cured material, light emitting diode device, and producing method thereof |
| CN104804705A (en) * | 2015-05-06 | 2015-07-29 | 成都拓利化工实业有限公司 | Low release quantity additive halogen-free flame-retardant heat-conduction organic silicon pouring sealant and preparation method thereof |
| CN106147602A (en) * | 2016-07-27 | 2016-11-23 | 天津凯华绝缘材料股份有限公司 | A kind of electronic package silicon composition and preparation method thereof |
| CN106751899A (en) * | 2016-12-14 | 2017-05-31 | 东至绿洲环保化工有限公司 | A kind of composite type antioxidant silicon rubber |
| GB201621650D0 (en) * | 2016-12-16 | 2017-02-01 | Formformform Ltd | Silicone elastomer composition |
| CN106750793A (en) * | 2016-12-19 | 2017-05-31 | 国网山东省电力公司东阿县供电公司 | Agriculture distribution environmentally friendly insulated cable material and preparation method thereof |
| CN107793992A (en) * | 2017-11-01 | 2018-03-13 | 杭州之江有机硅化工有限公司 | A kind of additional organosilicon casting glue and preparation method thereof |
| CN110016231A (en) * | 2019-04-26 | 2019-07-16 | 常州市沃科科技有限公司 | Fire-resistant silicon rubber and preparation method thereof, conducting wire |
| CN111020871A (en) * | 2019-12-31 | 2020-04-17 | 苏州卫生职业技术学院 | Nanofiber membrane for enzyme immobilization and preparation method thereof |
| CN114223094A (en) * | 2020-04-13 | 2022-03-22 | 旭化成株式会社 | Composite single-layer chemically cross-linked separator |
| CN112500706A (en) * | 2020-11-23 | 2021-03-16 | 中广核高新核材科技（苏州）有限公司 | Neutron shielding fireproof silicone adhesive and preparation method thereof |
| CN112778875A (en) * | 2020-12-31 | 2021-05-11 | 滁州圣好材料科技有限公司 | Water-based alkali-resistant primer for exterior wall and manufacturing method thereof |
| CN112759851A (en) * | 2021-01-20 | 2021-05-07 | 江苏中信国安新材料有限公司 | Flame-retardant polystyrene composite material and preparation method and application thereof |
Non-Patent Citations (11)
| Title |
|---|
| NORDSTROM, EG等: "Fracture toughness of hydroxyapatite/mica composite, packed hydroxyapatite, alumina ceramics, silicon nitride and -carbide", 《BIO-MEDICAL MATERIALS AND ENGINEERING 》 * |
| NORDSTROM, EG等: "Fracture toughness of hydroxyapatite/mica composite, packed hydroxyapatite, alumina ceramics, silicon nitride and -carbide", 《BIO-MEDICAL MATERIALS AND ENGINEERING 》, vol. 8, no. 1, 31 December 1998 (1998-12-31), pages 37 - 43 * |
| 刘德荣等: "马来酸酐聚乙二醇双酯-丙烯酸共聚物分散剂对碳酸钙在尼龙-6树脂中的分散效果研究", 《化学建材》 * |
| 刘德荣等: "马来酸酐聚乙二醇双酯-丙烯酸共聚物分散剂对碳酸钙在尼龙-6树脂中的分散效果研究", 《化学建材》, no. 06, 20 November 2008 (2008-11-20), pages 4 - 6 * |
| 李小瑞等: "马来酸聚乙二醇半酯与丙烯酸共聚物分散剂对Al_2O_3浆料的分散效果及机理研究", 《现代化工》 * |
| 李小瑞等: "马来酸聚乙二醇半酯与丙烯酸共聚物分散剂对Al_2O_3浆料的分散效果及机理研究", 《现代化工》, no. 1, 30 July 2005 (2005-07-30), pages 251 - 253 * |
| 胡伟兆等: "大分子分散改性剂PEG400-PMAH-PAA的合成及应用", 《合成化学》 * |
| 胡伟兆等: "大分子分散改性剂PEG400-PMAH-PAA的合成及应用", 《合成化学》, no. 03, 20 June 2011 (2011-06-20), pages 51 - 53 * |
| 胡伟兆等: "大分子分散改性剂PEG400-PMAH-PAA的合成及应用", 合成化学, vol. 19, no. 3, pages 331 - 333 * |
| 苑成: "陶瓷化硅橡胶阻燃体系的应用与研究进展", 《橡塑资源利用》 * |
| 苑成: "陶瓷化硅橡胶阻燃体系的应用与研究进展", 《橡塑资源利用》, no. 02, 28 April 2018 (2018-04-28), pages 28 - 31 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115522209A (en) * | 2022-10-09 | 2022-12-27 | 浙江丰业集团有限公司 | Steel strengthening treatment liquid and steel treatment process |
| CN115522209B (en) * | 2022-10-09 | 2024-01-30 | 浙江丰业集团有限公司 | Steel strengthening treatment liquid and steel treatment process |
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