CN109181526A - Flexible high-temperature resistant wire-coating composition and preparation method thereof based on polysiloxanes modification by copolymerization polyimides - Google Patents
Flexible high-temperature resistant wire-coating composition and preparation method thereof based on polysiloxanes modification by copolymerization polyimides Download PDFInfo
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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
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D179/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen, with or without oxygen, or carbon only, not provided for in groups C09D161/00 - C09D177/00
- C09D179/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
- C09D179/08—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
- C08G73/1003—Preparatory processes
- C08G73/1007—Preparatory processes from tetracarboxylic acids or derivatives and diamines
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- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
- C08G73/1057—Polyimides containing other atoms than carbon, hydrogen, nitrogen or oxygen in the main chain
- C08G73/106—Polyimides containing other atoms than carbon, hydrogen, nitrogen or oxygen in the main chain containing silicon
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/06—Preparatory processes
- C08G77/08—Preparatory processes characterised by the catalysts used
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/04—Polysiloxanes
- C08G77/22—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen and oxygen
- C08G77/26—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen and oxygen nitrogen-containing groups
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/18—Fireproof paints including high temperature resistant paints
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/65—Additives macromolecular
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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Abstract
The present invention relates to the flexible high-temperature resistant wire-coating compositions and preparation method thereof based on polysiloxanes modification by copolymerization polyimides.The wire-coating composition includes: the polysiloxanes modification by copolymerization polyimides of 10-45%, the solvent of 30-70%, the diluent of 10-60%, the lubricant of 1-10%, the levelling agent of 0.1-2.0%, and weight percent summation is 100%.Wire-coating composition solid content of the invention is 15-45%.
Description
Technical field
The present invention relates to a kind of flexible high-temperature resistant wire-coating composition based on polysiloxanes modification by copolymerization polyimides,
It provides cable and not only high temperature resistant but also had had flexible enamel-cover surface.
Background technique
Enameled wire is made of bare conductor and insulation paint film two parts for being coated on outside it, be widely used in electromagnetic coil,
The electric energy of the devices such as industrial engine transmits, it may be said that enameled wire is motor, electric appliance and household electrical appliance, telecommunication, electronic instrument electricity
The critical component of magnetic winding, as long as almost there is the place of electricity all to be unable to do without enameled wire.With aerospace and household electrical appliance etc.
It rapidly develops, brings broader field to the application of enameled wire, but higher want also is proposed to the performance of enameled wire simultaneously
It asks, and the performance quality of enameled wire depends greatly on the performance and quality of wire enamel.The effect of wire enamel is
Make to form a good insulating layer in winding between conducting wire and conducting wire, to prevent the circulation of electric current.Wire enamel is that a kind of electricity is exhausted
The insulating layer of edge function admirable must have good chemical property, dielectricity, in addition to this must also as electric insulation paint
With excellent mechanical performance and flexibility, because enameled wire can be with electrical equipment and electrical fortune during the processing of enameled wire
Row generates miscellaneous mechanical stress and such as rubs, compresses, stretches, therefore for wire enamel, does not need only to have excellent
Mechanical strength, wearability and have good adhesion with conductor, must also have good elasticity and flexibility, to be subjected to plus
The effect of more than work process various complicated mechanical stresses and physical factor.
In recent years, the wire enamel being widely used mainly includes modified poly ester, polyurethane, polyamidoimide, polyether sulfone
Five major class such as (ketone) and polyimides.These wire enamels respectively have feature, and as needed, when application selects different enameled wires
Paint.Wherein, polyimide wire coating enamel is that the highest insulated paint of temperature classification, long-term use temperature are reachable in current enameled wire
220 DEG C or more, there are the excellent performances such as high temperature resistant, high, the ageing-resistant and radiation hardness of intensity, smaller than general insulating materials in thickness
Outstanding dielectric properties are achieved with when more, the lightness and miniaturization to motor device are highly beneficial.But polyimides is rigid
Property molecular chain structure, it is difficult to meet high speed machine bobbin winder device, embedding equipment and flat wire enameled wire to wire enamel pliability
Requirement, and wire enamel during embedding technology, and uses enamel wire coil as element during coiling
Electric product in the process of running, have mechanical stress on wire enamel, it is thus possible to generate wire enamel elongation,
Phenomena such as paint film damages.And as the technology of electric manufacturing is constantly progressive the popularization and application with automatic production line,
More stringent requirements are proposed for the pliability of high speed machine bobbin winder device and embedding equipment to wire enamel.
Summary of the invention
The object of the present invention is to provide a kind of flexible high-temperature resistant enameled wires based on polysiloxanes modification by copolymerization polyimides
Coating compositions.Polysiloxanes is a kind of elastomeric material for having both flexibility and high temperature resistance, and polysiloxanes is passed through copolymerization
Reaction is introduced into polyimide molecule chain, the flexibility of silicon oxygen bond while on the one hand destroying polyimide molecule chain regularity
The flexibility and extendability that can make copolymer improve, and another aspect silicon oxygen bond bond energy with higher is improving polyimides
It is flexible and meanwhile its heat resistance will not be reduced.Have complementary advantages both to make, improves polyimide wire coating enamel and enamel-cover
The flexibility of line obtains not only high temperature resistant but also has flexible wire enamel, is essential with meeting domestic market to the urgent of such product
It asks.
Flexible high-temperature resistant wire-coating composition based on polysiloxanes modification by copolymerization polyimides of the invention, it includes
(A) the polysiloxanes modification by copolymerization polyimides of 10-45% weight percent,
(B) solvent of 30-70% weight percent,
(C) diluent of 10-60% weight percent,
(D) lubricant of 1-10% weight percent, and
(E) levelling agent of 0.1-2.0% weight percent,
And the weight percent summation of (A)-(E) is 100%.
Flexible high-temperature resistant wire-coating composition based on polysiloxanes modification by copolymerization polyimides of the invention, feature
The molecular weight for being the polysiloxanes modification by copolymerization polyimides is 4000-200000.
Flexible high-temperature resistant wire-coating composition based on polysiloxanes modification by copolymerization polyimides of the invention, feature
It is that polysiloxane level is 0.5-30mol% in the polysiloxanes modification by copolymerization polyimides.
Flexible high-temperature resistant wire-coating composition based on polysiloxanes modification by copolymerization polyimides of the invention, feature
The molecular weight for being polysiloxanes in the polysiloxanes modification by copolymerization polyimides is 500-30000.
Flexible high-temperature resistant wire-coating composition based on polysiloxanes modification by copolymerization polyimides of the invention, feature
Be the solvent be isopropanol, n-butanol, chloroform, 1,2- dichloroethanes, tetrahydrofuran (THF), n,N-Dimethylformamide
(DMF), or mixtures thereof N-Methyl pyrrolidone (NMP), dimethyl acetamide (DMAc), dimethyl sulfoxide.
Flexible high-temperature resistant wire-coating composition based on polysiloxanes modification by copolymerization polyimides of the invention, feature
It is the diluent is non-polar hydrocarbon compound.
Flexible high-temperature resistant wire-coating composition based on polysiloxanes modification by copolymerization polyimides of the invention, feature
It is the diluent is toluene, hexane, hexamethylene, heptane, or mixtures thereof octane.
Flexible high-temperature resistant wire-coating composition based on polysiloxanes modification by copolymerization polyimides of the invention, feature
Be the lubricant be polyethylene wax, polyester wax, polyamide wax, or mixtures thereof palm wax.
Flexible high-temperature resistant wire-coating composition based on polysiloxanes modification by copolymerization polyimides of the invention, feature
Be the levelling agent be or mixtures thereof low molecular weight propylene acid copolymer, Siloxane-Oxyalkylene Copolymers, silicone polymer.
The present invention is based on the preparation sides of the flexible high-temperature resistant wire-coating composition of polysiloxanes modification by copolymerization polyimides
Method, it is characterised in that: polysiloxanes modification by copolymerization polyimides is added in solvent keeps its molten in 20-90 DEG C of stirring 0.5-3h
Solution, is then added diluent and continues to stir, and stirring 0.5-1h is added in lubricant and levelling agent.
Present invention has the advantages that the flexible high-temperature resistant wire enamel group of the polysiloxanes modification by copolymerization polyimides provided
It closes object and not only high temperature resistant but also had had flexibility.
Specific embodiment
The present invention is further described for embodiment again below.
Polysiloxanes modification by copolymerization polyimide structures test: using the NEXUS- of Thermo Nicolet company of the U.S.
670 FTIR spectrum instrument carries out structural characterization to sample.A small amount of sample is mixed with KBr, levigate, tabletting obtains test specimens
Product.Using KBr as reference, the acquisition of FTIR spectrogram is carried out.Test scope is 4000~650cm-1。
Structural characterization is carried out to sample with the 510 type nuclear magnetic resonance chemical analyser of Bruker of Brooker,Switzerland company.Test-strips
Part: solvent CDCl3Or DMSO, inside it is designated as tetramethylsilane.
Thermal weight loss point is carried out to sample with the Netzch Sta 449c type thermogravimetric analyzer of German Nai Chi instrument manufacturing company
Analysis.Operating condition: N2Atmosphere, heating rate be 10 DEG C/min, 30 DEG C~900 DEG C of temperature range.
With the molecular weight (Mn) of 1515 gel permeation chromatograph of the Waters measurement sample of Waters, US.Operation
Condition: sample volume is 50 μ L, and mobile phase is tetrahydrofuran, and flow velocity 1mL/min, stationary phase is polystyrene.
Embodiment 1:
The synthesis of Amino End Group polysiloxanes: starting stirring, and 47.68g octamethylcy-clotetrasiloxane, catalyst tetramethyl is added
Amino-terminated dose of 1,3- bis- (3- aminopropyls) -1,1 is added in ammonium hydroxide 1.8976g, promotor dimethyl sulfoxide 0.2512g,
3,3- tetramethyl disiloxane 1.4268g are heated to 90 DEG C of insulation reaction 6h under nitrogen protection；Then, 140 are warming up to
DEG C and maintain 1h, make catalyst inactivation, be down to room temperature, finally carry out vacuum distillation and remove oligomer and unreacted raw material, obtain
The Amino End Group polysiloxanes for being 1243 to molecular weight.By changing amino-terminated dose of dosage, the end of different molecular weight can be prepared
Amino silicones.
The synthesis of polysiloxanes modification by copolymerization polyimides: it in 1200ml N, N '-solvent dimethylformamide, is added
0.076mol Amino End Group polysiloxanes and 4,4 ' -10 grams of diaminodiphenyl ethers (0.05mol), is stirred at room temperature 0.5h to 4,4 '-two
Amino-diphenylethers is completely dissolved, under nitrogen protection, point 4 batches of additions, 28 grams of (0.128mol) pyromellitic acid anhydrides, and room temperature reaction
4h, 60 DEG C of revolvings obtain polysiloxanes modification by copolymerization polyimides to remove solvent.Pass through point of regulation Amino End Group polysiloxanes
Different molecular weight and different polysiloxane levels can be prepared in son amount and its with 4, the molar ratio of 4 '-diaminodiphenyl ethers
Polysiloxanes modification by copolymerization polyimides.
Wire enamel preparation:
By 40 grams of polysiloxanes modification by copolymerization polyimides (molecular weight: 10034；Polysiloxanes: molecular weight 1243, content
It 30mol%) is added in 90 milliliters of n,N-Dimethylformamide, is dissolved in 30 DEG C, stir 50 minutes formation solution, be then added 1
Gram silicone polymer and 5 grams of polyester wax, are added 10 milliliters of toluene after being completely dissolved, and in 30 DEG C insulated and stirred 3 hours, i.e.,
Obtain wire enamel.
The wire enamel solid content as made from the present embodiment is 34%, and rotary viscosity is 1750mPas at 25 DEG C.
Embodiment 2:
By 30 grams of polysiloxanes modification by copolymerization polyimides (molecular weight: 4538；Polysiloxanes: molecular weight 532, content
1mol%；) be added in 70 milliliters of N-Methyl pyrrolidones, it is dissolved in 90 DEG C, stirs 30 minutes formation solution, be then added 0.3
Gram low molecular weight propylene acid copolymer；0.5 gram of polyethylene wax is added to 90 DEG C, in 20 milliliters of dimethylbenzene to completely molten
Solution, is then mixed and added into 10 milliliters of n-butanols for the xylene solution of sulfonated polyether-ether-ketone solution and polyethylene wax, in 90 DEG C
Insulated and stirred 3 hours.Emulsion temperature is down to 45 DEG C to get enamel-cover rapidly by the inner-outer circulation type of cooling with 30 DEG C of cold water
Line paint.
The wire enamel solid content as made from the present embodiment is 25%, and rotary viscosity is 1180mPas at 25 DEG C.
Embodiment 3:
By 57 grams of polysiloxanes modification by copolymerization polyimides (molecular weight: 21181；Polysiloxanes: 2242 content of molecular weight
It 5mol%) is added in the mixture of 65 milliliters of N-Methyl pyrrolidones and 5 milliliters of isopropanols, is dissolved in 50 DEG C, stirred 30 minutes
Solution is formed, 3 grams of polyamide waxes and 0.5 gram of Siloxane-Oxyalkylene Copolymers are then added, 15 milliliters of first is added after being completely dissolved
Benzene, and in 50 DEG C insulated and stirred 3 hours.Emulsion temperature is down to 45 rapidly by the inner-outer circulation type of cooling with 30 DEG C of cold water
DEG C to get wire enamel.
The wire enamel solid content as made from the present embodiment is 45%, and rotary viscosity is 3000mPas at 25 DEG C.
Embodiment 4:
By 30 grams of polysiloxanes modification by copolymerization polyimides (molecular weight: 57147；Polysiloxanes: molecular weight 4198, content
It 20mol%) is added in 80 milliliters of tetrahydrofurans, is dissolved in 40 DEG C, stir 30 minutes formation solution, 10 grams of polyester is then added
Wax and 1 gram of low molecular weight propylene acid copolymer, after being completely dissolved be added 20 milliliters of toluene, and in 40 DEG C insulated and stirred 3 hours, i.e.,
Obtain wire enamel.
The wire enamel solid content as made from the present embodiment is 31%, and rotary viscosity is 2100mPas at 25 DEG C.
Embodiment 5:
By 20 grams of polysiloxanes modification by copolymerization polyimides (molecular weight: 134318；Polysiloxanes: molecular weight: 8195, contain
Measure 10mol%) it is added in the mixture of 60 milliliters of dimethyl acetamides and 10 milliliters of n-butanols, it is dissolved in 65 DEG C, stirs 30 points
It is bell at solution, 0.5 gram of palm wax and 0.2 gram of low molecular weight propylene acid copolymer is then added, is added 30 after being completely dissolved
Milliliter hexane, and in 65 DEG C insulated and stirred 3 hours.With 30 DEG C of cold water by the inner-outer circulation type of cooling rapidly by solution temperature
Degree is down to 45 DEG C to get wire enamel.
The wire enamel solid content as made from the present embodiment is 18%, and rotary viscosity is 3500mPas at 25 DEG C.
Comparative example:
(molecular weight: the mixed of 65 milliliters of N-Methyl pyrrolidones and 5 milliliters of isopropanols 20317) is added in 57 grams of polyimides
It closes in object, is dissolved in 50 DEG C, stir 30 minutes formation solution, 3 grams of polyamide waxes and 0.5 gram of polyether-modified poly- silicon oxygen is then added
Alkane, is added 15 milliliters of toluene after being completely dissolved, and in 50 DEG C insulated and stirred 3 hours.Cold water with 30 DEG C passes through inner-outer circulation
Emulsion temperature is down to 45 DEG C rapidly to get wire enamel by the type of cooling.
The wire enamel solid content as made from the present embodiment is 45%, and rotary viscosity is 2831mPas at 25 DEG C.
The test of enameled wire performance obtained by the present invention:
The bare wire of selection diameter 1.0mm is painted on enamelling machine using wire enamel prepared by the various embodiments described above
Envelope curve japanning.Using micrometer caliper, mono- 6 type pinhole test instrument of XYZ, mono- H-type of HTJ springs back angle tester, mono- II type enamel-cover of HJD
Line jerks disconnected tester, and mono- I type of HQX unidirectionally scrapes the test that lacquer test instrument carries out enamelled wire surface performance and mechanical property, utilizes
Mono- 3 type electromagnetic wire voltage test instrument of DCX and mono- 11 type of HRJ softening breakdown test instrument carry out enameled wire electric performance test, utilize QTX
Type paint film compliance test apparatus carries out flexibility test, and test result is summarized in table 1.
The enameled wire performance of 1 embodiment of table preparation
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (9)
1. a kind of flexible high-temperature resistant wire-coating composition based on polysiloxanes modification by copolymerization polyimides, it includes
(A) the polysiloxanes modification by copolymerization polyimides of 10-45% weight percent,
(B) solvent of 30-70% weight percent,
(C) diluent of 10-60% weight percent,
(D) lubricant of 1-10% weight percent, and
(E) levelling agent of 0.1-2.0% weight percent,
And the weight percent summation of (A)-(E) is 100%.
2. the flexible high-temperature resistant wire enamel combination according to claim 1 based on polysiloxanes modification by copolymerization polyimides
Object, it is characterized in that the molecular weight of the polysiloxanes modification by copolymerization polyimides is 4000-200000, polysiloxanes modification by copolymerization
Polysiloxane level is 0.5-30mol% in polyimides.
3. the flexible high-temperature resistant wire enamel combination according to claim 1 based on polysiloxanes modification by copolymerization polyimides
Object, it is characterized in that the molecular weight of polysiloxanes is 500-30000 in the polysiloxanes modification by copolymerization polyimides.
4. the flexible high-temperature resistant wire enamel combination according to claim 1 based on polysiloxanes modification by copolymerization polyimides
Object, it is characterized in that the solvent is isopropanol, n-butanol, chloroform, 1,2- dichloroethanes, tetrahydrofuran (THF), N, N- diformazan
Or mixtures thereof base formamide (DMF), N-Methyl pyrrolidone (NMP), dimethyl acetamide (DMAc), dimethyl sulfoxide.
5. the flexible high-temperature resistant wire enamel combination according to claim 1 based on polysiloxanes modification by copolymerization polyimides
Object, it is characterized in that the diluent is non-polar hydrocarbon compound.
6. the flexible high-temperature resistant wire enamel combination according to claim 5 based on polysiloxanes modification by copolymerization polyimides
Object, it is characterized in that the diluent is toluene, hexane, hexamethylene, heptane, or mixtures thereof octane.
7. the flexible high-temperature resistant wire enamel combination according to claim 1 based on polysiloxanes modification by copolymerization polyimides
Object, it is characterized in that the lubricant is polyethylene wax, polyester wax, polyamide wax, or mixtures thereof palm wax.
8. the flexible high-temperature resistant wire enamel combination according to claim 1 based on polysiloxanes modification by copolymerization polyimides
Object, it is characterized in that the levelling agent be low molecular weight propylene acid copolymer, Siloxane-Oxyalkylene Copolymers, silicone polymer or its
Mixture.
9. a kind of flexible high-temperature resistant wire enamel according to claim 1 based on polysiloxanes modification by copolymerization polyimides
The preparation method of composition, it is characterised in that: polysiloxanes modification by copolymerization polyimides is added in solvent and is stirred in 20-90 DEG C
0.5-3h makes it dissolve, and diluent is then added and continues to stir, and stirring 0.5-1h is added in lubricant and levelling agent.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115512887A (en) * | 2022-10-08 | 2022-12-23 | 江苏远红电缆有限公司 | Crosslinked polyethylene heat-resistant insulated cable |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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