CN107987714A - A kind of high thermal polyurethane insulated paint and preparation method thereof - Google Patents
A kind of high thermal polyurethane insulated paint and preparation method thereof Download PDFInfo
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- CN107987714A CN107987714A CN201711185031.9A CN201711185031A CN107987714A CN 107987714 A CN107987714 A CN 107987714A CN 201711185031 A CN201711185031 A CN 201711185031A CN 107987714 A CN107987714 A CN 107987714A
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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
- C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
- C09D175/04—Polyurethanes
- C09D175/12—Polyurethanes from compounds containing nitrogen and active hydrogen, the nitrogen atom not being part of an isocyanate group
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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
- 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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- 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
- 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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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
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- Paints Or Removers (AREA)
- Polyurethanes Or Polyureas (AREA)
- Organic Insulating Materials (AREA)
Abstract
The present invention relates to insulated paint technical field, and in particular to a kind of high thermal polyurethane insulated paint and preparation method thereof, the high thermal polyurethane insulated paint are reacted and are made by polyester polyol, blocked isocyanate, modified PU resins, catalyst and mixed solvent；Wherein, the mass ratio of polyester polyol, blocked isocyanate, modified PU resins and mixed solvent is 1:1‑1.8:0‑0.5:0.4 1.5, the dosage of catalyst is the 0.1%~5% of reactant gross mass.The high thermal polyurethane insulated paint heat resistance of the present invention is high, high temperature classification reaches 180 grades, and directly weldering property is good, has higher electric property, mechanical strength, superior heat shock resistance and softening resistance energy, can be widely applied to the electrical equipment and electrical of high temperature resistant, freon-resistant.
Description
Technical field
The present invention relates to insulated paint technical field, and in particular to a kind of high thermal polyurethane insulated paint and preparation method thereof.
Background technology
High temperature classification (180 grades) insulated paint is that products application is wide based on polyester-imide insulated paint currently on the market, city
Market share is huge, but polyester-imide insulated paint does not possess direct-welding property, need to use paint stripper could be welded, using it is upper more
Inconvenience.
The content of the invention
In order to overcome shortcoming and defect existing in the prior art, it is an object of the invention to provide a kind of high ammonia of resistance to hot polymerization
Ester insulated paint, the high thermal polyurethane insulated paint heat resistance is high, and high temperature classification reaches 180 grades, and straight weldering property is good, has higher
Electric property, mechanical strength, superior heat shock resistance and softening resistance energy, can be widely applied to high temperature resistant, freon-resistant
Electrical equipment and electrical.
Another object of the present invention is to provide a kind of preparation method of high thermal polyurethane insulated paint, preparation method step
Rapid simple, convenient operation and control, stable quality, production efficiency is high, and manufacturing cost is low, can large-scale industrial production.
The purpose of the present invention is achieved through the following technical solutions：A kind of high thermal polyurethane insulated paint, the resistance to hot polymerization of height
Urethane insulated paint is reacted and is made by polyester polyol, blocked isocyanate, modified PU resins, catalyst and mixed solvent；Its
In, polyester polyol, blocked isocyanate, the mass ratio of modified PU resins and mixed solvent are 1:1-1.8:0-0.5:0.4-
1.5, the dosage of catalyst is the 0.1%~5% of reactant gross mass.
Preferably, the preparation method of the polyester polyol is：By acid imide carboxylic acid dihydric alcohol, binary acid, trihydroxylic alcohol and
Catalyst mixes, and is warming up to 160-170 DEG C of progress esterification after mixing, after water rate is up to 80%, is to slowly warm up to
210-240 DEG C, reaction 4-6h reaches reaction end, is then cooled to 150 DEG C and adds a certain amount of mixed solvent, stirs evenly,
It is modulated into the polyester polyol that solid content is 40%-50%；Wherein, the matter of acid imide carboxylic acid, dihydric alcohol, binary acid and trihydroxylic alcohol
Amount is than being 1：0.2-3：0.5-3：0.5-3, catalyst are metal solvent, and the dosage of catalyst is the 0.5%- of reactant gross mass
1.5%.
Preferably, the preparation method of the acid imide carboxylic acid is：Trimellitic anhydride, diamine and cresols are mixed,
4-6h is reacted at a temperature of 160-170 DEG C, is cooled to 100-120 DEG C of discharging, acid imide carboxylic acid is made；Wherein, trimellitic anhydride acid
The mass ratio of acid anhydride and diamine is 2-4：1, the dosage of cresols is the 5%-15% of reactant gross mass.
Preferably, the preparation method of the blocked isocyanate is：By diisocyanate, dihydric alcohol, trihydroxylic alcohol and urge
Agent stirs evenly, and is to slowly warm up to 60-80 DEG C, reacts 6-10h, when NCO% reaches Theoretical Design amount, adds sealer,
And 120-140 DEG C is warming up to, 4-10h is reacted, sealer is reacted completely with free isocyano, final NCO% is less than 0.4%
To be issued to design load, cooling adds appropriate mixed solvent, and adjustment solid content is in 40%-60%；Wherein, diisocyanate,
The mass ratio of dihydric alcohol, trihydroxylic alcohol and sealer is 1：0-0.3：0-0.5：0.5-2, the dosage of catalyst is reactant gross mass
0.01%-0.5%.
Preferably, the dihydric alcohol be ethylene glycol, it is 1,3-PD, 1,2-PD, 1,4-butanediol, diethylene glycol (DEG), new
At least one in pentanediol, 2- methyl-1,3-propanediols, hexylene glycol, 3- methyl 1,5- pentanediols and 1,4 cyclohexane dimethanol
Kind；The trihydroxylic alcohol is glycerine, three (2- ethoxys) at least one of isocyanuric acid esters and 1,1,1- trimethylolpropanes.
Preferably, the binary acid is succinic acid, adipic acid, azelaic acid, sebacic acid, phthalic anhydride, terephthalic acid (TPA), isophthalic first
At least one of acid and maleic acid.
Preferably, the mixed solvent is with mass ratio 5-7 by phenols and benzene class:The mixture of 3-5 compositions.
Preferably, the sealer is at least one of phenol, cresols and xylenol.
Preferably, the catalyst for tetra-n-butyl titanate, titanium tetraisopropylate, butyl stannonic acid, triethylamine, zinc naphthenate,
At least one of zinc Isoocatanoate, cobalt-manganese catalyst, imidazole catalyst and N- methyl code woodss.
A kind of preparation method of high thermal polyurethane insulated paint, by polyester polyol, blocked isocyanate, modified PU trees
Fat and mixed solvent are with mass ratio 1:1-1.8:0-0.5:0.4-1.5 is uniformly mixed, and is heated to 30-50 DEG C, is then added appropriate
Catalyst, is sufficiently stirred, and polyurethane insulating varnish is made after filtering；Wherein, the dosage of catalyst is reactant gross mass
0.1%-5%.
The beneficial effects of the present invention are：The high thermal polyurethane insulated paint heat resistance of the present invention is high, and high temperature classification reaches
To 180 grades, and straight weldering property is good, has higher electric property, mechanical strength, superior heat shock resistance and softening resistance energy, can
It is widely used in the electrical equipment and electrical of high temperature resistant, freon-resistant.
The high thermal polyurethane insulated paint of the present invention, it is exhausted that its unique direct-welding property can solve current 180 grades of polyester-imides
Edge paint can not directly weldering property the problem of, not only with practical value, also have wide market potential.
The high thermal polyurethane insulated paint of the present invention improves poly- ammonia by using match gram (THEIC) and polyimide structures
The heat resistance of ester resin, introduces the mechanical strength that appropriate high molecular crosslink structure improves paint mould, and paint mould elasticity, prepares table
Face good leveling property, applies Wiring technology amplitude broad, breakdown voltage is high, hot punching performance is excellent.
The high thermal polyurethane insulated paint of the present invention has as follows a little：
(1) heat resistance is high, can be applicable in the electric equipment products of higher heat resistant requirements, application field is wider.
(2) straight weldering property is good, may replace existing polyester-imide insulated paint product.
(3) special thick level enameled wire is done to substitute three layer insulation wire.
Embodiment
For the ease of the understanding of those skilled in the art, with reference to embodiment, the present invention is further illustrated, real
The content that the mode of applying refers to not is limitation of the invention.
Embodiment 1
A kind of high thermal polyurethane insulated paint, the high thermal polyurethane insulated paint is by polyester polyol, enclosed type isocyanide
Acid esters, modified PU resins, catalyst and mixed solvent reaction are made；Wherein, polyester polyol, blocked isocyanate, modification
The mass ratio of PU resins and mixed solvent is 1:1:0:0.4, the dosage of catalyst is the 0.1% of reactant gross mass.
The preparation method of the polyester polyol is：Acid imide carboxylic acid dihydric alcohol, binary acid, trihydroxylic alcohol and catalyst are mixed
Close, be warming up to 160 DEG C of progress esterifications after mixing, after water rate is up to 80%, be to slowly warm up to 210 DEG C, react 4h
Reach reaction end, be then cooled to 150 DEG C and add a certain amount of mixed solvent, stir evenly, be modulated into solid content as 40%
Polyester polyol；Wherein, the mass ratio of acid imide carboxylic acid, dihydric alcohol, binary acid and trihydroxylic alcohol is 1：0.2：0.5：0.5, urge
Agent is metal solvent, and the dosage of catalyst is the 0.5% of reactant gross mass.
The preparation method of the acid imide carboxylic acid is：Trimellitic anhydride, diamine and cresols are mixed, in 160 DEG C of temperature
Lower reaction 4h, is cooled to 100 DEG C of dischargings, and acid imide carboxylic acid is made；Wherein, the mass ratio of trimellitic anhydride acid anhydrides and diamine is
2：1, the dosage of cresols is the 5% of reactant gross mass.
The preparation method of the blocked isocyanate is：Diisocyanate, dihydric alcohol, trihydroxylic alcohol and catalyst are stirred
Uniformly, 60 DEG C are to slowly warm up to, reacts 6h, when NCO% reaches Theoretical Design amount, adds sealer, and is warming up to 120 DEG C,
4h is reacted, sealer is reacted completely with free isocyano, final NCO% is less than 0.4% to be issued to design load, and cooling adds
Enter appropriate mixed solvent, adjustment solid content is 40%；Wherein, the quality of diisocyanate, dihydric alcohol, trihydroxylic alcohol and sealer
Than for 1：0：0：0.5, the dosage of catalyst is the 0.01% of reactant gross mass.
The dihydric alcohol is ethylene glycol, 1,3- propane diols or 1,2- propane diols；The trihydroxylic alcohol is glycerine.
The binary acid is succinic acid or adipic acid.
The mixed solvent is with mass ratio 5 by phenols and benzene class:The mixture of 5 compositions.
The sealer is phenol.
The catalyst is tetra-n-butyl titanate or titanium tetraisopropylate.
A kind of preparation method of high thermal polyurethane insulated paint, by polyester polyol, blocked isocyanate, modified PU trees
Fat and mixed solvent are with mass ratio 1:1:0:0.4 is uniformly mixed, and is heated to 30 DEG C, then adds proper catalyst, is sufficiently stirred,
Polyurethane insulating varnish is made after filtering；Wherein, the dosage of catalyst is the 0.1% of reactant gross mass.
Embodiment 2
A kind of high thermal polyurethane insulated paint, the high thermal polyurethane insulated paint is by polyester polyol, enclosed type isocyanide
Acid esters, modified PU resins, catalyst and mixed solvent reaction are made；Wherein, polyester polyol, blocked isocyanate, modification
The mass ratio of PU resins and mixed solvent is 1:1.2:0.1:0.7, the dosage of catalyst is the 1% of reactant gross mass.
The preparation method of the polyester polyol is：Acid imide carboxylic acid dihydric alcohol, binary acid, trihydroxylic alcohol and catalyst are mixed
Close, be warming up to 162 DEG C of progress esterifications after mixing, after water rate is up to 80%, be to slowly warm up to 215 DEG C, reaction
4.5h reaches reaction end, is then cooled to 150 DEG C and adds a certain amount of mixed solvent, stirs evenly, being modulated into solid content is
42% polyester polyol；Wherein, the mass ratio of acid imide carboxylic acid, dihydric alcohol, binary acid and trihydroxylic alcohol is 1：1：1：1, catalysis
Agent is metal solvent, and the dosage of catalyst is the 0.8% of reactant gross mass.
The preparation method of the acid imide carboxylic acid is：Trimellitic anhydride, diamine and cresols are mixed, in 162 DEG C of temperature
Lower reaction 4.5h, is cooled to 105 DEG C of dischargings, and acid imide carboxylic acid is made；Wherein, the mass ratio of trimellitic anhydride acid anhydrides and diamine
For 2.5：1, the dosage of cresols is the 8% of reactant gross mass.
The preparation method of the blocked isocyanate is：Diisocyanate, dihydric alcohol, trihydroxylic alcohol and catalyst are stirred
Uniformly, 65 DEG C are to slowly warm up to, reacts 7h, when NCO% reaches Theoretical Design amount, adds sealer, and is warming up to 125 DEG C,
6h is reacted, sealer is reacted completely with free isocyano, final NCO% is less than 0.4% to be issued to design load, and cooling adds
Enter appropriate mixed solvent, adjustment solid content is 45%；Wherein, the quality of diisocyanate, dihydric alcohol, trihydroxylic alcohol and sealer
Than for 1：0.1：0.1：0.8, the dosage of catalyst is the 0.1% of reactant gross mass.
The dihydric alcohol is 1,4- butanediols or diethylene glycol (DEG)；The trihydroxylic alcohol is three (2- ethoxys) isocyanuric acid esters.
The binary acid is azelaic acid or sebacic acid.
The mixed solvent is with mass ratio 5.5 by phenols and benzene class:The mixture of 4.5 compositions.
The sealer is cresols.
The catalyst is butyl stannonic acid or triethylamine.
A kind of preparation method of high thermal polyurethane insulated paint, by polyester polyol, blocked isocyanate, modified PU trees
Fat and mixed solvent are with mass ratio 1:1.2:0.1:0.7 is uniformly mixed, and is heated to 35 DEG C, then adds proper catalyst, fully
Stirring, is made polyurethane insulating varnish after filtering；Wherein, the dosage of catalyst is the 1% of reactant gross mass.
Embodiment 3
A kind of high thermal polyurethane insulated paint, the high thermal polyurethane insulated paint is by polyester polyol, enclosed type isocyanide
Acid esters, modified PU resins, catalyst and mixed solvent reaction are made；Wherein, polyester polyol, blocked isocyanate, modification
The mass ratio of PU resins and mixed solvent is 1:1.4:0.25:0.8, the dosage of catalyst is the 2.5% of reactant gross mass.
The preparation method of the polyester polyol is：Acid imide carboxylic acid dihydric alcohol, binary acid, trihydroxylic alcohol and catalyst are mixed
Close, be warming up to 165 DEG C of progress esterifications after mixing, after water rate is up to 80%, be to slowly warm up to 225 DEG C, react 5h
Reach reaction end, be then cooled to 150 DEG C and add a certain amount of mixed solvent, stir evenly, be modulated into solid content as 45%
Polyester polyol；Wherein, the mass ratio of acid imide carboxylic acid, dihydric alcohol, binary acid and trihydroxylic alcohol is 1：1.5：1.5：1.5, urge
Agent is metal solvent, and the dosage of catalyst is the 1% of reactant gross mass.
The preparation method of the acid imide carboxylic acid is：Trimellitic anhydride, diamine and cresols are mixed, in 165 DEG C of temperature
Lower reaction 5h, is cooled to 110 DEG C of dischargings, and acid imide carboxylic acid is made；Wherein, the mass ratio of trimellitic anhydride acid anhydrides and diamine is
3：1, the dosage of cresols is the 10% of reactant gross mass.
The preparation method of the blocked isocyanate is：Diisocyanate, dihydric alcohol, trihydroxylic alcohol and catalyst are stirred
Uniformly, 70 DEG C are to slowly warm up to, reacts 8h, when NCO% reaches Theoretical Design amount, adds sealer, and is warming up to 130 DEG C,
7h is reacted, sealer is reacted completely with free isocyano, final NCO% is less than 0.4% to be issued to design load, and cooling adds
Enter appropriate mixed solvent, adjustment solid content is 50%；Wherein, the quality of diisocyanate, dihydric alcohol, trihydroxylic alcohol and sealer
Than for 1：0.15：0.25：1.2, the dosage of catalyst is the 0.25% of reactant gross mass.
The dihydric alcohol is neopentyl glycol；The trihydroxylic alcohol is 1,1,1- trimethylolpropanes.
The binary acid is phthalic anhydride.
The mixed solvent is with mass ratio 6 by phenols and benzene class:The mixture of 4 compositions.
The sealer is xylenol.
The catalyst is zinc naphthenate or zinc Isoocatanoate.
A kind of preparation method of high thermal polyurethane insulated paint, by polyester polyol, blocked isocyanate, modified PU trees
Fat and mixed solvent are with mass ratio 1:1.4:0.25:0.8 is uniformly mixed, and is heated to 40 DEG C, then adds proper catalyst, fully
Stirring, is made polyurethane insulating varnish after filtering；Wherein, the dosage of catalyst is the 2.5% of reactant gross mass.
Embodiment 4
A kind of high thermal polyurethane insulated paint, the high thermal polyurethane insulated paint is by polyester polyol, enclosed type isocyanide
Acid esters, modified PU resins, catalyst and mixed solvent reaction are made；Wherein, polyester polyol, blocked isocyanate, modification
The mass ratio of PU resins and mixed solvent is 1:1.6:0.4:1.2, the dosage of catalyst is the 4% of reactant gross mass.
The preparation method of the polyester polyol is：Acid imide carboxylic acid dihydric alcohol, binary acid, trihydroxylic alcohol and catalyst are mixed
Close, be warming up to 168 DEG C of progress esterifications after mixing, after water rate is up to 80%, be to slowly warm up to 230 DEG C, reaction
5.5h reaches reaction end, is then cooled to 150 DEG C and adds a certain amount of mixed solvent, stirs evenly, being modulated into solid content is
48% polyester polyol；Wherein, the mass ratio of acid imide carboxylic acid, dihydric alcohol, binary acid and trihydroxylic alcohol is 1：2：2：2, catalysis
Agent is metal solvent, and the dosage of catalyst is the 1.2% of reactant gross mass.
The preparation method of the acid imide carboxylic acid is：Trimellitic anhydride, diamine and cresols are mixed, in 168 DEG C of temperature
Lower reaction 5.5h, is cooled to 115 DEG C of dischargings, and acid imide carboxylic acid is made；Wherein, the mass ratio of trimellitic anhydride acid anhydrides and diamine
For 3.5：1, the dosage of cresols is the 12% of reactant gross mass.
The preparation method of the blocked isocyanate is：Diisocyanate, dihydric alcohol, trihydroxylic alcohol and catalyst are stirred
Uniformly, 75 DEG C are to slowly warm up to, reacts 9h, when NCO% reaches Theoretical Design amount, adds sealer, and is warming up to 135 DEG C,
8h is reacted, sealer is reacted completely with free isocyano, final NCO% is less than 0.4% to be issued to design load, and cooling adds
Enter appropriate mixed solvent, adjustment solid content is 55%；Wherein, the quality of diisocyanate, dihydric alcohol, trihydroxylic alcohol and sealer
Than for 1：0.2：0.4：1.6, the dosage of catalyst is the 0.4% of reactant gross mass.
The dihydric alcohol is 2- methyl-1,3-propanediols or hexylene glycol；The trihydroxylic alcohol is glycerine.
The binary acid is terephthalic acid (TPA) or a benzoic acid.
The mixed solvent is with mass ratio 6.5 by phenols and benzene class:The mixture of 3.5 compositions.
The sealer is phenol.
The catalyst is cobalt-manganese catalyst or imidazole catalyst.
A kind of preparation method of high thermal polyurethane insulated paint, by polyester polyol, blocked isocyanate, modified PU trees
Fat and mixed solvent are with mass ratio 1:1.6:0.4:1.2 are uniformly mixed, and are heated to 45 DEG C, then add proper catalyst, fully
Stirring, is made polyurethane insulating varnish after filtering；Wherein, the dosage of catalyst is the 4% of reactant gross mass.
Embodiment 5
A kind of high thermal polyurethane insulated paint, the high thermal polyurethane insulated paint is by polyester polyol, enclosed type isocyanide
Acid esters, modified PU resins, catalyst and mixed solvent reaction are made；Wherein, polyester polyol, blocked isocyanate, modification
The mass ratio of PU resins and mixed solvent is 1:1.8:0.5:1.5, the dosage of catalyst is the 5% of reactant gross mass.
The preparation method of the polyester polyol is：Acid imide carboxylic acid dihydric alcohol, binary acid, trihydroxylic alcohol and catalyst are mixed
Close, be warming up to 170 DEG C of progress esterifications after mixing, after water rate is up to 80%, be to slowly warm up to 240 DEG C, react 6h
Reach reaction end, be then cooled to 150 DEG C and add a certain amount of mixed solvent, stir evenly, be modulated into solid content as 50%
Polyester polyol；Wherein, the mass ratio of acid imide carboxylic acid, dihydric alcohol, binary acid and trihydroxylic alcohol is 1：3：3：3, catalyst is
Metal solvent, the dosage of catalyst are the 1.5% of reactant gross mass.
The preparation method of the acid imide carboxylic acid is：Trimellitic anhydride, diamine and cresols are mixed, in 170 DEG C of temperature
Lower reaction 6h, is cooled to 120 DEG C of dischargings, and acid imide carboxylic acid is made；Wherein, the mass ratio of trimellitic anhydride acid anhydrides and diamine is
4：1, the dosage of cresols is the 15% of reactant gross mass.
The preparation method of the blocked isocyanate is：Diisocyanate, dihydric alcohol, trihydroxylic alcohol and catalyst are stirred
Uniformly, 80 DEG C are to slowly warm up to, reacts 10h, when NCO% reaches Theoretical Design amount, adds sealer, and is warming up to 140 DEG C,
10h is reacted, sealer is reacted completely with free isocyano, final NCO% is less than 0.4% to be issued to design load, cools down
Appropriate mixed solvent is added, adjustment solid content is 60%；Wherein, the matter of diisocyanate, dihydric alcohol, trihydroxylic alcohol and sealer
Amount is than being 1：0.3：0.5：2, the dosage of catalyst is the 0.5% of reactant gross mass.
The dihydric alcohol is 3- methyl 1,5- pentanediols or 1,4 cyclohexane dimethanol；The trihydroxylic alcohol is three (2- hydroxyl second
Base) isocyanuric acid ester.
The binary acid is maleic acid.
The mixed solvent is with mass ratio 7 by phenols and benzene class:The mixture of 3 compositions.
The sealer is cresols.
The catalyst is N- methyl code woodss.
A kind of preparation method of high thermal polyurethane insulated paint, by polyester polyol, blocked isocyanate, modified PU trees
Fat and mixed solvent are with mass ratio 1:1.8:0.5:1.5 are uniformly mixed, and are heated to 50 DEG C, then add proper catalyst, fully
Stirring, is made polyurethane insulating varnish after filtering；Wherein, the dosage of catalyst is the 5% of reactant gross mass.
High thermal polyurethane insulated paint produced by the present invention carries out enamel-cover thread test：Horizontal type recirculation furnace (furnace superintendent
3.8m)；Furnace temperature (380 DEG C of evaporator strip, central 400 DEG C, 420 DEG C of hardenability band) cored wire (φ 0.5mm)；Coating method：Mould 8 returns；
Arrangement of molds：0.53 ㎜, 0.54 ㎜, 0.55 × 2 ㎜, 0.56 × 2 ㎜, 0.57 ㎜, 0.58 ㎜.It is as follows to detect data：
As can be seen from the above table, high thermal polyurethane insulated paint heat resistance produced by the present invention is high, and high temperature classification reaches
180 grades, and straight weldering property is good, has higher electric property, mechanical strength, superior heat shock resistance and softening resistance energy, can be wide
It is general to be applied to high temperature resistant, the electrical equipment and electrical of freon-resistant.
Above-described embodiment is the preferable implementation of the present invention, and in addition, the present invention can be realized with other manner,
Do not depart from and any on the premise of present inventive concept obviously replace within protection scope of the present invention.
Claims (10)
- A kind of 1. high thermal polyurethane insulated paint, it is characterised in that：The high thermal polyurethane insulated paint is by polyester polyol, envelope Closed form isocyanates, modified PU resins, catalyst and mixed solvent reaction are made；Wherein, polyester polyol, enclosed type isocyanic acid The mass ratio of ester, modified PU resins and mixed solvent is 1:1-1.8:0-0.5:0.4-1.5, the dosage of catalyst are total for reactant The 0.1%~5% of quality.
- A kind of 2. high thermal polyurethane insulated paint according to claim 1, it is characterised in that：The system of the polyester polyol Preparation Method is：Acid imide carboxylic acid dihydric alcohol, binary acid, trihydroxylic alcohol and catalyst are mixed, are warming up to 160-170 after mixing DEG C esterification is carried out, after water rate is up to 80%, be to slowly warm up to 210-240 DEG C, reaction 4-6h reaches reaction end, then It is cooled to 150 DEG C and adds a certain amount of mixed solvent, stir evenly, is modulated into the polyester polyol that solid content is 40%-50%； Wherein, the mass ratio of acid imide carboxylic acid, dihydric alcohol, binary acid and trihydroxylic alcohol is 1：0.2-3：0.5-3：0.5-3, catalyst are gold Belong to catalyst, the dosage of catalyst is the 0.5%-1.5% of reactant gross mass.
- A kind of 3. high thermal polyurethane insulated paint according to claim 2, it is characterised in that：The system of the acid imide carboxylic acid Preparation Method is：Trimellitic anhydride, diamine and cresols are mixed, 4-6h is reacted at a temperature of 160-170 DEG C, is cooled to 100- 120 DEG C of dischargings, are made acid imide carboxylic acid；Wherein, the mass ratio of trimellitic anhydride acid anhydrides and diamine is 2-4：1, the use of cresols Measure the 5%-15% for reactant gross mass.
- A kind of 4. high thermal polyurethane insulated paint according to claim 1, it is characterised in that：The blocked isocyanate Preparation method be：Diisocyanate, dihydric alcohol, trihydroxylic alcohol and catalyst are stirred evenly, are to slowly warm up to 60-80 DEG C, instead 6-10h is answered, when NCO% reaches Theoretical Design amount, adds sealer, and is warming up to 120-140 DEG C, 4-10h is reacted, makes closing Agent is reacted completely with free isocyano, and final NCO% is less than 0.4% to be issued to design load, and cooling adds appropriate mixing Solvent, adjustment solid content is in 40%-60%；Wherein, the mass ratio of diisocyanate, dihydric alcohol, trihydroxylic alcohol and sealer is 1： 0-0.3：0-0.5：0.5-2, the dosage of catalyst are the 0.01%-0.5% of reactant gross mass.
- A kind of 5. high thermal polyurethane insulated paint according to claim 2 or 4, it is characterised in that：The dihydric alcohol is second Glycol, 1,3- propane diols, 1,2- propane diols, 1,4- butanediols, diethylene glycol (DEG), neopentyl glycol, 2- methyl-1,3-propanediols, oneself two At least one of alcohol, 3- methyl 1,5- pentanediols and 1,4 cyclohexane dimethanol；The trihydroxylic alcohol is glycerine, three (2- hydroxyls Ethyl) at least one of isocyanuric acid ester and 1,1,1- trimethylolpropanes.
- A kind of 6. high thermal polyurethane insulated paint according to claim 2, it is characterised in that：The binary acid is fourth two At least one of acid, adipic acid, azelaic acid, sebacic acid, phthalic anhydride, terephthalic acid (TPA), a benzoic acid and maleic acid.
- A kind of 7. high thermal polyurethane insulated paint according to claim 1 or 2 or 4, it is characterised in that：The mixed solvent It is with mass ratio 5-7 by phenols and benzene class:The mixture of 3-5 compositions.
- A kind of 8. high thermal polyurethane insulated paint according to claim 4, it is characterised in that：The sealer for phenol, At least one of cresols and xylenol.
- A kind of 9. high thermal polyurethane insulated paint according to claim 1 or 4, it is characterised in that：The catalyst is titanium Sour four N-butyls, titanium tetraisopropylate, butyl stannonic acid, triethylamine, zinc naphthenate, zinc Isoocatanoate, cobalt-manganese catalyst, imidazole catalyst At least one of with N- methyl code woodss.
- 10. such as a kind of preparation method of high thermal polyurethane insulated paint of claim 1-9 any one of them, it is characterised in that： By polyester polyol, blocked isocyanate, modified PU resins and mixed solvent with mass ratio 1:1-1.8:0-0.5:0.4-1.5 It is uniformly mixed, is heated to 30-50 DEG C, then adds proper catalyst, be sufficiently stirred, polyurethane insulating varnish is made after filtering； Wherein, the dosage of catalyst is the 0.1%-5% of reactant gross mass.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109468048A (en) * | 2018-10-29 | 2019-03-15 | 苏州太湖电工新材料股份有限公司 | A kind of water-based insulating paint of electronic transformer and its preparation method and application |
| CN109887656A (en) * | 2019-04-12 | 2019-06-14 | 珠海蓉胜超微线材有限公司 | The polyester enamelled wire and its production method that can directly weld |
| CN111040602A (en) * | 2019-12-27 | 2020-04-21 | 阜阳欣奕华材料科技有限公司 | Polyurethane coating agent and preparation method and application thereof |
| CN112430425A (en) * | 2020-12-25 | 2021-03-02 | 东莞宏石功能材料科技有限公司 | High-heat-resistance polyurethane insulating paint and preparation method thereof |
| CN115141539A (en) * | 2022-05-23 | 2022-10-04 | 东莞宇隆电工材料有限公司 | High-frequency-resistant low-temperature soldering tin H-grade insulating varnish and enameled wire |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103965764A (en) * | 2014-04-15 | 2014-08-06 | 丹阳四达化工有限公司 | Synthetic method of polyester polyurethane wire enamel with high heat-resistant grade |
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2017
- 2017-11-23 CN CN201711185031.9A patent/CN107987714B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103965764A (en) * | 2014-04-15 | 2014-08-06 | 丹阳四达化工有限公司 | Synthetic method of polyester polyurethane wire enamel with high heat-resistant grade |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109468048A (en) * | 2018-10-29 | 2019-03-15 | 苏州太湖电工新材料股份有限公司 | A kind of water-based insulating paint of electronic transformer and its preparation method and application |
| CN109468048B (en) * | 2018-10-29 | 2020-01-14 | 苏州太湖电工新材料股份有限公司 | Water-based insulating paint for electronic transformer and preparation method and application thereof |
| WO2020088429A1 (en) * | 2018-10-29 | 2020-05-07 | 苏州太湖电工新材料股份有限公司 | Water-based insulating varnish for transformer, preparation method and application thereof |
| CN109887656A (en) * | 2019-04-12 | 2019-06-14 | 珠海蓉胜超微线材有限公司 | The polyester enamelled wire and its production method that can directly weld |
| CN111040602A (en) * | 2019-12-27 | 2020-04-21 | 阜阳欣奕华材料科技有限公司 | Polyurethane coating agent and preparation method and application thereof |
| CN112430425A (en) * | 2020-12-25 | 2021-03-02 | 东莞宏石功能材料科技有限公司 | High-heat-resistance polyurethane insulating paint and preparation method thereof |
| CN115141539A (en) * | 2022-05-23 | 2022-10-04 | 东莞宇隆电工材料有限公司 | High-frequency-resistant low-temperature soldering tin H-grade insulating varnish and enameled wire |
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| CN107987714B (en) | 2020-11-13 |
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