CN107474782A - A kind of antistatic polyurethane casting glue and its application method - Google Patents
A kind of antistatic polyurethane casting glue and its application method Download PDFInfo
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- CN107474782A CN107474782A CN201710701022.4A CN201710701022A CN107474782A CN 107474782 A CN107474782 A CN 107474782A CN 201710701022 A CN201710701022 A CN 201710701022A CN 107474782 A CN107474782 A CN 107474782A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
- C09J175/06—Polyurethanes from polyesters
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- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
- C08G18/4266—Polycondensates having carboxylic or carbonic ester groups in the main chain prepared from hydroxycarboxylic acids and/or lactones
- C08G18/4269—Lactones
- C08G18/4277—Caprolactone and/or substituted caprolactone
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- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4825—Polyethers containing two hydroxy groups
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- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4833—Polyethers containing oxyethylene units
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- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/48—Polyethers
- C08G18/4854—Polyethers containing oxyalkylene groups having four carbon atoms in the alkylene group
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- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
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- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
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- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
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- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/08—Macromolecular additives
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
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- C09J175/00—Adhesives based on polyureas or polyurethanes; Adhesives based on derivatives of such polymers
- C09J175/04—Polyurethanes
- C09J175/08—Polyurethanes from polyethers
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- 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
- C08K3/02—Elements
- C08K2003/026—Phosphorus
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- 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
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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- 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
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- 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
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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- C08K3/28—Nitrogen-containing compounds
- C08K2003/282—Binary compounds of nitrogen with aluminium
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- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/32—Phosphorus-containing compounds
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- C08K2003/323—Ammonium polyphosphate
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- C08L2201/04—Antistatic
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- C08L2203/206—Applications use in electrical or conductive gadgets use in coating or encapsulating of electronic parts
Abstract
The invention provides a kind of antistatic polyurethane casting glue and its application method.The antistatic polyurethane casting glue includes the component of following parts by weight：40 50 parts of polyisocyanates, 60 72 parts of polyalcohol, 2 2.4 parts of graphene oxide, 67 80 parts of filler, 0.05 0.08 parts of catalyst.The application method is：After each component of the antistatic polyurethane casting glue is mixed, embedding thing is treated in cast, then solidifies 24 48h at 20 30 DEG C, forms blob of viscose.There is good mechanical performance after antistatic polyurethane embedding adhesive curing provided by the invention, and have higher insulating properties and antistatic property concurrently, the embedding for the electric elements that are particularly suitable for use in.
Description
Technical field
The invention belongs to casting glue technical field, and in particular to a kind of antistatic polyurethane casting glue and its application method.
Background technology
It is widely available with electronic product, LED illumination and outdoor light artistic work so that element is increasingly inclined to corpusculum
Product, high integration development, cause wire pitch less and less, dielectric film more and more thinner, and electrical breakdown withstand performance is also more and more poor.And
Electrostatic potential of the electronic product accumulated in the processes such as production, storage and transport is but considerably beyond its breakdown voltage threshold (example
As the pressure-resistant threshold value of LED blue light wafers only have 1000 more lie prostrate, it is easy to by electrostatic breakdown), this may cause device breakdown or
Failure, reduces its reliability, brings potential safety hazard.
Casting glue is a kind of conventional glue sealed to device, plays moistureproof, dust-proof, insulation after hardening, prevents
The effect such as shake, its antistatic behaviour are increasingly taken seriously in fields such as electronics, LED.Current antistatic casting glue is mainly logical
Following two methods are crossed to reach anlistatig effect：
A. conductive-type filler is added in casting glue, such as：Metal powder, carbon black, graphite powder, acetylene black etc.；
B. the surfactants such as zwitterionic compound, anionic compound are mixed into casting glue.
Although method a can be accumulated by the electric conductivity of filler come minimizing electrostatic, it can also cause the resistance of colloid
Rate declines to a great extent, it is difficult to meets the insulating requirements of electronics and LED class products.Method b is by surfactant migration to embedding
The surface of glue, one layer of very thin moisture film is formed with the hydrone in air, so as to dissipate the electric charge of surface accumulation.But surface
The migration of activating agent is to all the winds, to be damaged behind the surfactant arrival electronics of migration or the surface of LED components
Its bad performance, and surfactant is antistatic ageing poor, is usually no more than six months.
Therefore, it is expected to obtain a kind of term of validity length in this area, and have the embedding of high insulating property and antistatic property concurrently
Glue.
The content of the invention
In view of the deficienciess of the prior art, it is an object of the invention to provide a kind of antistatic polyurethane casting glue and its
Application method.There is good mechanical performance after the antistatic polyurethane embedding adhesive curing, and have concurrently higher insulating properties and
Antistatic property.
To use following technical scheme up to this purpose, the present invention：
On the one hand, the present invention provides a kind of antistatic polyurethane casting glue, includes the component of following parts by weight：
Graphene oxide is the oxide of graphene, is a kind of new carbon of excellent performance, has good heat conduction
Performance, mechanical property and insulating properties, and with the abundant functional group of higher specific surface area and surface.Graphene oxide is equal
Even is distributed in resinae matrix, can improve mechanical property and heat conductivility of material etc., therefore is commonly used for heat filling,
But it there is no the research on improving antistatic property using graphene oxide.
Graphene oxide is used for polyurethane pouring sealant by the present invention, makes the blob of viscose surface after solidification with hydroxyl, carboxyl, ring
Epoxide and carbonyl isopolarity group, can adsorb the moisture in air and form very thin moisture film, accelerate the dissipation of surface electrostatic, suppression
Buildup of static electricity processed；And the larger specific surface area of graphene oxide makes it have good adsorptivity, it helps the shape of moisture film
Into, moreover it is possible to prevent it from migrating and coming off from blob of viscose, there is permanent antistatic；Further, since graphene oxide sheet is as exhausted
Edge material, therefore obtained blob of viscose also has good insulating properties concurrently.
In the present invention, the parts by weight of the polyisocyanates can be 40 parts, 41 parts, 42 parts, 43 parts, 44 parts, 45 parts,
46 parts, 47 parts, 48 parts, 49 parts or 50 parts etc..
The parts by weight of the polyalcohol can be 60 parts, 61 parts, 62 parts, 63 parts, 64 parts, 65 parts, 66 parts, 67 parts, 68
Part, 69 parts, 70 parts, 71 parts or 72 parts etc..
The parts by weight of the graphene oxide can be 1.6 parts, 1.7 parts, 1.8 parts, 1.9 parts, 2 parts, 2.1 parts, 2.2
Part, 2.3 parts, 2.4 parts, 2.5 parts, 2.6 parts, 2.7 parts, 2.8 parts, 2.9 parts, 3 parts, 3.1 parts, 3.2 parts, 3.3 parts, 3.4 parts or 3.5
Part etc..
In the present invention, the dosage of graphene oxide is very few, then is difficult to play anlistatig effect, its dosage is excessive, then can
Cause the viscosity of casting glue excessive, it is difficult to embedding.
The parts by weight of the filler can be 67 parts, 68 parts, 69 parts, 70 parts, 71 parts, 72 parts, 73 parts, 74 parts, 75 parts,
76 parts, 77 parts, 78 parts, 79 parts or 80 parts etc..
The parts by weight of the catalyst can be 0.05 part, 0.06 part, 0.07 part or 0.08 part etc..
As the preferred technical solution of the present invention, the antistatic polyurethane casting glue also include 4.3-5.3 parts (such as
4.3 parts, 4.4 parts, 4.5 parts, 4.6 parts, 4.7 parts, 4.8 parts, 4.9 parts, 5 parts, 5.1 parts, 5.2 parts or 5.3 parts etc.) anti-blushing agent.
Preferably, the anti-blushing agent is 3A molecular sieves.
Preferably, the antistatic polyurethane casting glue also include 0.8-1.3 parts (such as 0.8 part, 0.9 part, 1 part, 1.1
Part, 1.2 parts or 1.3 parts etc.) anti-settling agent.
Preferably, the anti-settling agent is selected from montmorillonite, organobentonite, aerosil, kaolin or nano-calcium carbonate
One kind or at least two combination in calcium；Such as can be montmorillonite combined with bentonite, montmorillonite and gas phase two
The combination of silica, montmorillonite with it is kaolinic combine, the combination of organobentonite and aerosil, organobentonite with
Kaolinic combination, the combination of organobentonite and nano-calcium carbonate, aerosil and kaolinic combination or kaolin
With the combination of nano-calcium carbonate etc..
Preferably, the antistatic polyurethane casting glue also include 1.5-1.8 parts (such as 1.5 parts, 1.6 parts, 1.7 parts or
1.8 parts etc.) fire retardant.
Preferably, the fire retardant is in APP, tributyl phosphate, aluminium hydroxide, magnesium hydroxide or red phosphorus
It is a kind of or at least two combination.
Such as can be the combination of APP and tributyl phosphate, the combination of APP and aluminium hydroxide, polyphosphoric acid
The combination of ammonium and red phosphorus, the combination of tributyl phosphate and aluminium hydroxide, combination or the hydroxide of tributyl phosphate and magnesium hydroxide
Combination of magnesium and red phosphorus etc..
As the preferred technical solution of the present invention, the antistatic polyurethane casting glue also include 0.5-1.6 parts (such as
0.5 part, 0.6 part, 0.7 part, 0.8 part, 0.9 part, 1 part, 1.1 parts, 1.2 parts, 1.3 parts, 1.4 parts, 1.5 parts or 1.6 parts etc.) disappear
Infusion.
Preferably, the defoamer is polyethers and/or polyesters defoamer without organosilicon.
Preferably, the defoamer is selected from polypropylene glycerol aether, polyoxyethylene polyoxypropylene glycerin ether, polyoxyethylene and gathered
One kind or at least two in oxypropylene pentaerythrite ether, polyoxyethylene polyoxy propyl alcohol amidogen ether or the fatty acid ester compounded thing of higher alcohols
Combination；Such as can be the combination of polypropylene glycerol aether and polyoxyethylene polyoxypropylene glycerin ether, polypropylene glycerol aether
The group of combination, polypropylene glycerol aether and polyoxyethylene polyoxy propyl alcohol amidogen ether with polyoxyethylene polyoxypropylene pentaerythrite ether
Combination, polyoxyethylene polyoxypropylene glycerin ether and the polyoxy second of conjunction, polypropylene glycerol aether and the fatty acid ester compounded thing of higher alcohols
The combination of alkene polyoxypropylene pentaerythrite ether, the group of oxygen ethene polyoxypropylene pentaerythrite ether and polyoxyethylene polyoxy propyl alcohol amidogen ether
Conjunction or the combination of polyoxyethylene polyoxy propyl alcohol amidogen ether and the fatty acid ester compounded thing of higher alcohols etc..
As the preferred technical solution of the present invention, the polyisocyanates is aliphatic polyisocyante.
Preferably, the aliphatic polyisocyante is selected from hexamethylene diisocyanate (HDI), cyclohexanedimethyleterephthalate
Diisocyanate (H6) or one kind in IPDI (IPDI) or at least two combination XDI；Such as can be with
It is HDI and H6XDI combination, HDI and IPDI combination or H6XDI and IPDI combination etc..
As the preferred technical solution of the present invention, it is more that the polyalcohol is selected from polyoxyethylated polyols, PPOX
One kind or at least two combination in first alcohol, polytetrahydrofuran polyol, castor oil or polycaprolactone polyol；Such as can be with
It is combination, polyoxyethylated polyols and the polytetrahydrofuran polyol of polyoxyethylated polyols and polyoxypropylene polyol
Combination, the combinations of polyoxyethylated polyols and castor oil, the combination of polyoxyethylated polyols and polycaprolactone polyol,
The combination of polyoxypropylene polyol and polytetrahydrofuran polyol, the combining of polyoxypropylene polyol and castor oil, poly- four
The combination of hydrogen furan polyols and castor oil or the combination of castor oil and polycaprolactone polyol etc..
Preferably, the graphene oxide is Hummers method graphene oxides.
As the preferred technical solution of the present invention, the filler is heat filling and/or non-conductive filler.
Preferably, the heat filling is in Alpha-alumina, zinc oxide, silicon powder, aluminium nitride, boron nitride or carborundum
One kind or at least two combination；Such as can be the group of the combination of Alpha-alumina and zinc oxide, Alpha-alumina and silicon powder
Close, Alpha-alumina and the combination of aluminium nitride, the combination of Alpha-alumina and boron nitride, combination, the oxidation of Alpha-alumina and carborundum
The combination of zinc and silicon powder, the combination of zinc oxide and aluminium nitride, the combination of zinc oxide and boron nitride, the group of zinc oxide and carborundum
Close, aluminium nitride and the combination of boron nitride, the combination of aluminium nitride and carborundum or the combination of boron nitride and carborundum etc..
Preferably, the non-conductive filler is calcium carbonate and/or calcium sulfate.
As the preferred technical solution of the present invention, the catalyst is selected from dibutyl tin dilaurate, bismuth naphthenate, cycloalkanes
Sour cobalt, zinc naphthenate, tributyl phosphorus or one kind in triethyl phosphine or at least two combination；Such as can be dibutyl tin
The combination of cinnamic acid tin and bismuth naphthenate, the combination of dibutyl tin dilaurate and zinc naphthenate, dibutyl tin dilaurate and three
The combination of butyl phosphorus, the combination of bismuth naphthenate and tributyl phosphorus, bismuth naphthenate and the combination of triethyl phosphine or cobalt naphthenate and three
Combination of ethyl phosphorus etc..
On the other hand, the present invention provides a kind of application method of above-mentioned antistatic polyurethane casting glue, the application method
For：
After each component of the antistatic polyurethane casting glue is mixed, embedding thing is treated in cast, then solid at 20-30 DEG C
Change 24-48h, form blob of viscose.
Preferably, the step of mixing is：First polyisocyanates is mixed with graphene oxide by formula, ultrasound point
Dissipate, then mixed with other components.
First polyisocyanates is mixed with graphene oxide, make the hydroxyl of surface of graphene oxide and edge random distribution with
A small amount of isocyano reaction, helps to increase the steric hindrance between graphene oxide, reduces graphene oxide layer and layer
Between Van der Waals force, prevent graphene oxide from reuniting, can uniformly, be dispersed stably in polyisocyanates.
In actual applications, each component of antistatic polyurethane casting glue provided by the invention can be separated and deposited, and be made
Used time is just mixed, and is deposited after can also constituent part be mixed in advance, to reduce operating time when using.If mix in advance
Close, then in addition to ensureing polyisocyanates and separately being deposited with polyalcohol, the present invention is not particularly limited to hybrid mode.But consider
Filler easily settles, and to make mixed system keep stable, each component can be exemplarily divided into two parts of following A, B, mixed respectively
Close：
Component A：Polyisocyanates 40-50 parts by weight, filler 40-45 parts by weight, graphene oxide 1.6-3.5 parts by weight,
Anti-blushing agent 1.5-2 parts by weight, anti-settling agent 0.5-0.7 parts by weight, fire retardant 1.5-1.8 parts by weight and defoamer 0.3-0.8 weight
Part；
B component：Polyalcohol 60-72 parts by weight, filler 27-35 parts by weight, catalyst 0.05-0.08 parts by weight, anti-blushing agent
2.8-3.3 parts by weight, anti-settling agent 0.3-0.6 parts by weight and defoamer 0.2-0.8 parts by weight.
Preferably, it is described to treat that embedding thing is electric elements.
Compared with prior art, the invention has the advantages that：
Graphene oxide is used for polyurethane pouring sealant by the present invention, makes the blob of viscose surface after solidification with hydroxyl, carboxyl, ring
Epoxide and carbonyl isopolarity group, can adsorb the moisture in air and form very thin moisture film, accelerate the dissipation of surface electrostatic, suppression
Buildup of static electricity processed；And the larger specific surface area of graphene oxide makes it have good adsorptivity, it helps the shape of moisture film
Into, moreover it is possible to prevent it from migrating and coming off from blob of viscose, there is permanent antistatic；Further, since graphene oxide sheet is as exhausted
Edge material, therefore obtained blob of viscose also has good insulating properties concurrently.
Tensile strength after encapsulating polyurethane adhesive curing provided by the invention is 2.2-2.5MPa, shear strength (aluminium/aluminium)
For 1.8-3.5MPa；Specific insulation under dry environment is 1013-1014Ω·cm；Sheet resistance is 108-109Ω。
Embodiment
Technical scheme is further illustrated below by specific embodiment.Those skilled in the art should be bright
, the embodiment be only to aid in understand the present invention, be not construed as to the present invention concrete restriction.
Embodiment 1
A kind of antistatic polyurethane casting glue, include the component of following parts by weight：
Embodiment 2
A kind of antistatic polyurethane casting glue, include the component of following parts by weight：
Embodiment 3
A kind of antistatic polyurethane casting glue, include the component of following parts by weight：
Embodiment 4
A kind of antistatic polyurethane casting glue, include the component of following parts by weight：
Embodiment 5
A kind of antistatic polyurethane casting glue, include the component of following parts by weight：
Embodiment 6
A kind of antistatic polyurethane casting glue, include the component of following parts by weight：
Comparative example 1
Difference with embodiment 6 is that the parts by weight of graphene oxide are 0.
The component polyisocyanates and graphene oxide for the polyurethane pouring sealant that above-described embodiment and comparative example are provided mix
Ultrasonic disperse after conjunction, then after being mixed with other components, solidify 24h at 25 DEG C, form blob of viscose.To the electrical property and machinery of blob of viscose
Performance is measured, as a result as shown in table 1 below.
Table 1
From the data of table 1, when not adding graphene oxide, after obtained embedding adhesive curing, surface will not be formed
Moisture film, therefore its sheet resistance is higher, loses anlistatig performance；And graphene oxide also has the function that enhancing in itself,
Therefore the embedding adhesive curing post-tensioning intensity and shear strength that comparative example 1 provides also have decline.In addition, in measure volume resistance
During rate, because moisture film and the blob of viscose on the fast surface of glue form parallel circuit, therefore the filling that embodiment 1-6 is provided under home in itself
The measured value of specific insulation is relatively low after sealing solidification.But electronic device is packaged in inside casting glue in actual applications,
Therefore insulating properties will not be influenceed by moisture film.
Applicant states, the foregoing is only the embodiment of the present invention, but protection scope of the present invention not office
It is limited to this, person of ordinary skill in the field is it will be clearly understood that any belong to those skilled in the art and taken off in the present invention
In the technical scope of dew, the change or replacement that can readily occur in, all fall within protection scope of the present invention and it is open within the scope of.
Claims (10)
1. a kind of antistatic polyurethane casting glue, it is characterised in that the antistatic polyurethane casting glue includes following parts by weight
Several components：
2. antistatic polyurethane casting glue according to claim 1, it is characterised in that the antistatic polyurethane casting glue
Also include the anti-blushing agent of 4.3-5.3 parts；
Preferably, the anti-blushing agent is 3A molecular sieves；
Preferably, the antistatic polyurethane casting glue also includes the anti-settling agent of 0.8-1.3 parts；
Preferably, the anti-settling agent is in montmorillonite, organobentonite, aerosil, kaolin or nano-calcium carbonate
One kind or at least two combination；
Preferably, the antistatic polyurethane casting glue also includes the fire retardant of 1.5-1.8 parts；
Preferably, the one kind of the fire retardant in APP, tributyl phosphate, aluminium hydroxide, magnesium hydroxide or red phosphorus
Or at least two combination.
3. antistatic polyurethane casting glue according to claim 1 or 2, it is characterised in that the antistatic polyurethane fills
Sealing also includes the defoamer of 0.5-1.6 parts；
Preferably, the defoamer is polyethers and/or polyesters defoamer without organosilicon；
Preferably, the defoamer is selected from polypropylene glycerol aether, polyoxyethylene polyoxypropylene glycerin ether, polyoxyethylene polyoxy third
Alkene pentaerythrite ether, polyoxyethylene polyoxy propyl alcohol amidogen ether or one kind or at least two group in the fatty acid ester compounded thing of higher alcohols
Close.
4. according to the antistatic polyurethane casting glue described in claim any one of 1-3, it is characterised in that the polyisocyanates
For aliphatic polyisocyante；
Preferably, the aliphatic polyisocyante is selected from hexamethylene diisocyanate, the isocyanic acid of cyclohexanedimethyleterephthalate two
One kind or at least two combination in ester or IPDI.
5. according to the antistatic polyurethane casting glue described in claim any one of 1-4, it is characterised in that the polyalcohol is selected from
In polyoxyethylated polyols, polyoxypropylene polyol, polytetrahydrofuran polyol, castor oil or polycaprolactone polyol
It is a kind of or at least two combination；
Preferably, the graphene oxide is Hummers method graphene oxides.
6. according to the antistatic polyurethane casting glue described in claim any one of 1-5, it is characterised in that the filler is heat conduction
Filler and/or non-conductive filler；
Preferably, the heat filling in Alpha-alumina, zinc oxide, silicon powder, aluminium nitride, boron nitride or carborundum one
Kind or at least two combination；
Preferably, the non-conductive filler is calcium carbonate and/or calcium sulfate.
7. according to the antistatic polyurethane casting glue described in claim any one of 1-6, it is characterised in that the catalyst is selected from
Dibutyl tin dilaurate, bismuth naphthenate, cobalt naphthenate, zinc naphthenate, tributyl phosphorus or one kind in triethyl phosphine or at least
Two kinds of combination.
A kind of 8. application method of antistatic polyurethane casting glue as described in claim any one of 1-7, it is characterised in that institute
Stating application method is：
After each component of the antistatic polyurethane casting glue is mixed, embedding thing is treated in cast, is then solidified at 20-30 DEG C
24-48h, form blob of viscose.
9. application method according to claim 8, it is characterised in that be the step of the mixing：By formula first by polyisocyanate
Cyanate mixes with graphene oxide, ultrasonic disperse, then is mixed with other components.
10. application method according to claim 8 or claim 9, it is characterised in that described to treat that embedding thing is electric elements.
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| CN107987770A (en) * | 2017-12-28 | 2018-05-04 | 广东生益科技股份有限公司 | High heat conductive insulating adhesive compound and preparation method thereof |
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