CN114561085A - Preparation method and application of high-performance motor packaging material - Google Patents
Preparation method and application of high-performance motor packaging material Download PDFInfo
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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
- C08L63/00—Compositions of epoxy resins; Compositions of derivatives of epoxy resins
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- C—CHEMISTRY; METALLURGY
- 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
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/20—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the epoxy compounds used
- C08G59/22—Di-epoxy compounds
- C08G59/24—Di-epoxy compounds carbocyclic
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- C—CHEMISTRY; METALLURGY
- 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
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
- C08G59/42—Polycarboxylic acids; Anhydrides, halides or low molecular weight esters thereof
- C08G59/4215—Polycarboxylic acids; Anhydrides, halides or low molecular weight esters thereof cycloaliphatic
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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
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
- C08G59/42—Polycarboxylic acids; Anhydrides, halides or low molecular weight esters thereof
- C08G59/4284—Polycarboxylic acids; Anhydrides, halides or low molecular weight esters thereof together with other curing agents
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- C—CHEMISTRY; METALLURGY
- 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
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
- C08G59/62—Alcohols or phenols
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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
- C08L2203/206—Applications use in electrical or conductive gadgets use in coating or encapsulating of electronic parts
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- Chemical Kinetics & Catalysis (AREA)
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Abstract
The invention relates to the field of motor packaging, in particular to a preparation method and application of a high-performance motor packaging material. The preparation method of the high-performance motor packaging material comprises the following steps: (1): preparing resin A; (2): preparing a curing agent; (3): the resin and the curing agent are reacted to obtain the high-performance motor packaging material; wherein the mass ratio of the resin A to the curing agent is as follows: 1: 0.7-1.3; in the step (1), the preparation raw materials of the resin A comprise 3, 4-epoxy hexyl methyl-3, 4-epoxy cyclohexyl formic ether, acrylic polyurethane resin, a toughening agent, a novel functional filling agent, an anti-settling agent and a coupling agent; the raw materials prepared by the curing agent in the step (2) contain methyl tetrahydrophthalic anhydride, polyether polyol, novel functional filling powder, an anti-settling agent and an accelerator. The motor packaging material uses the modified powder as the filling material, has the characteristic of large using amount, and can reduce the cost; and on the basis of using a large amount of filling powder, the motor packaging material with good toughness, strength and temperature resistance effect is prepared.
Description
The technical field is as follows:
the invention relates to the field of motor packaging, in particular to a preparation method and application of a high-performance motor packaging material.
Background art:
with the development of society, people have higher and higher requirements on motor packaging; the potting material factory for motors requires the following characteristics: the motor has the advantages that the motor has good fluidity before solidification, can permeate into uneven gaps on the surface of a winding, and the outer surface of a workpiece after encapsulation is smooth and flat, so that the motor has basically the same rotational inertia during rotation, vibration caused by sudden change of mechanical stress when the rotation speed and the rotation direction of the motor are suddenly changed is reduced, and the resistance of a cooling medium to the rotating part of the motor is reduced. The adhesive has strong adhesive force to the motor winding, strong cold and hot impact resistance toughness and high enough mechanical strength. The heat conduction coefficient is high, so that the temperature difference between the inner surface and the outer surface of the encapsulating material is reduced, on one hand, heat generated during the operation of the motor can be quickly conducted to the outer surface of a workpiece, and on the other hand, the internal stress caused by the temperature difference can be reduced. Has good electrical insulation property and fermented wine property. Although many studies on the potting material exist in China, the major emphasis is on potting protection, and in the prior art, the toughness and the glass transition temperature of the system are improved by adding a toughening agent and alicyclic epoxy resin, and the glass transition temperature of the system is limited because the toughness of the system tends to be reduced along with the increase of the glass transition temperature.
In order to further improve the heat resistance of the material, the glass transition temperature of the system needs to be increased, but the mechanical properties of the epoxy resin are correspondingly reduced along with the increase of the glass transition temperature of the epoxy resin, and meanwhile, in order to improve the thermal conductivity of the system, a filler needs to be added, so that the toughness of the system is further reduced, and the durability and the manufacturability of the material are influenced.
The invention content is as follows:
the technical scheme of the invention is provided for solving the problem that the existing motor packaging material cannot have better mechanical property, toughness and durability in use when a filler is added to increase the heat resistance and improve the glass transition temperature of the material.
The motor packaging material uses the modified powder as the filling material, has the characteristic of large using amount, and can reduce the cost; and on the basis of using a large amount of filling powder, the motor packaging material with good toughness, strength and temperature resistance effect is prepared.
On one hand, the invention provides a preparation method of a high-performance motor packaging material, which comprises the following steps: (1): preparing resin A; (2): preparing a curing agent; (3): the action process of the resin and the curing agent.
Wherein, the raw materials for preparing the resin A in the step (1) comprise 3, 4-epoxy hexyl methyl-3, 4-epoxy cyclohexyl formic ether, acrylic polyurethane resin, a flexibilizer, a novel functional filling agent, an anti-settling agent and a coupling agent;
in the step (1), the 3, 4-epoxyhexylmethyl-3, 4-epoxycyclohexyl formate accounts for 0.1-50 parts by weight, preferably 5-50 parts by weight, 10-50 parts by weight, 20-48 parts by weight, 30-45 parts by weight and 35-45 parts by weight.
In the step (1), the acrylic polyurethane resin is 0.1-10 parts by mass, preferably 0.5-10 parts by mass, 1-10 parts by mass, 2-10 parts by mass, 4-10 parts by mass and 5-9 parts by mass; preferred acrylic urethane resins are difunctional urethane acrylates such as: T20D, Easepi U600, SW2200, THUNCHEMT 21.
In the step (1), the mass parts of the toughening agent are 4-20 parts, preferably 5-18 parts, 5-15 parts, 7-13 parts and 8-12 parts. Preferably, the toughening agent is EPC-205.
In the step (1), the novel functional filling powder is 35-65 parts by weight, preferably 45-62 parts by weight, 50-60 parts by weight, 52-58 parts by weight and 53-57 parts by weight. The preparation method of the novel functional filling powder comprises the following steps: the powder is placed in a container, the coupling agent is sprayed while stirring, and then the powder is placed in a temperature of 100 ℃ and 150 ℃ for baking for 2 to 20 hours. The mass ratio of the powder to the coupling agent is 100: (0.01-10), preferably 100: (0.1-5), more preferably 100: (0.5-1). The coupling agent may be selected from: at least one of A-151, A-1120, A-171, A-174, A-1706, and A-187. The oven temperature is preferably at least 110-. The baking time is further preferably 5-15h, 6-10h, 6-8 h.
In the step (1), the anti-settling agent is 0.001-2 parts by weight, preferably 0.002-1.5 parts by weight, 0.005-1.2 parts by weight, 0.01-1 part by weight and 0.05-0.5 part by weight. Preferably, the anti-settling agent is bentonite.
In the step (1), the coupling agent is 0.001-2 parts by weight, preferably 0.002-1.5 parts by weight, 0.005-1.2 parts by weight, 0.01-1 part by weight and 0.05-0.5 part by weight. Preferably, the coupling agent is gamma- (2, 3-glycidoxy) propyltrimethoxysilane.
The preparation process in the step (1) comprises the following steps: (a) adding 3, 4-epoxy hexyl methyl-3, 4-epoxy cyclohexyl formic ether, acrylic polyurethane resin, toughening agent and coupling agent into a container, and uniformly stirring; (b) adding the novel functional filling powder and the anti-settling agent, and continuing stirring.
And (c) adding the novel functional filling powder and the anti-settling agent while stirring after the liquid material liquid in the step (a) is fully and uniformly stirred and has no obvious cluster, and continuing stirring.
Wherein, the stirring speed and the stirring time in the steps (a) and (b) are both 100 and 5000 revolutions per minute and 0.1 to 4 hours; preferably, the stirring speed and the stirring time are both 500-1000 rpm and 0.2-2 h.
The raw materials prepared by the curing agent in the step (2) contain methyl tetrahydrophthalic anhydride, polyether polyol, novel functional filling powder, an anti-settling agent and an accelerator.
In the step (2), the mass portion of the methyl tetrahydrophthalic anhydride is 40-99 parts, preferably 45-95 parts, 50-90 parts and 55-85 parts.
In the step (2), the polyether polyol is 0.01-12 parts by weight, preferably 0.1-11 parts by weight, 0.5-10 parts by weight and 2-8 parts by weight. The preferred polyether polyol is polyethylene glycol monooleate.
In the step (2), the novel functional filling powder is 35-65 parts by weight, preferably 45-62 parts by weight, 50-60 parts by weight, 52-58 parts by weight and 53-57 parts by weight. The preparation method of the novel functional filling powder comprises the following steps: the powder is placed in a container, the coupling agent is sprayed while stirring, and then the powder is placed in a temperature of 100 ℃ and 150 ℃ for baking for 2 to 20 hours. The mass ratio of the powder to the coupling agent is 100: (0.01-10), preferably 100: (0.1-5), more preferably 100: (0.5-1). The coupling agent may be selected from: at least one of A-151, A-1120, A-171, A-174, A-1706, and A-187. The oven temperature is preferably at least 110-. The baking time is further preferably 5-15h, 6-10h, 6-8 h.
In the step (2), the anti-settling agent accounts for 0.001-2 parts by mass, preferably 0.002-1.5 parts by mass, 0.005-1.2 parts by mass, 0.01-1 part by mass and 0.05-0.5 part by mass. Preferably, the anti-settling agent is bentonite.
In the step (2), the mass parts of the accelerator are 0.001-2 parts, preferably 0.002-1.5 parts, 0.005-1.2 parts, 0.01-1 part and 0.05-0.5 part. Preferably, the accelerator is at least one of benzyldimethylamine, cyanoimidazole, 2-methylimidazole and 2-methyl-4-ethylimidazole.
The preparation process in the step (2) comprises the following steps: (a1) adding methyl tetrahydrophthalic anhydride, polyether polyol and an accelerant into a container and stirring; (b1) and adding the novel functional filling powder and the anti-settling agent while stirring to obtain the curing agent.
Wherein, the step (a1) is to stir the reaction for 1-10h at the temperature of 120-200 ℃. And the stirring time of the step (b1b) is 0.1-5 h.
The stirring rotation speed of steps (a1) and (b1) is 100-. The stirring reaction temperature in the step (a1) is preferably 130-. The stirring time in the step (b1) is preferably 0.2-4h, 0.3-3h and 0.4-2 h.
The mass ratio of the resin A to the curing agent in the step (3) is as follows: 1: 0.7-1.3, preferably 1: 0.8-1.2, 1: 0.85-115, 1: 0.9-1.1.
The process of the step (3) comprises the following steps: (a3) combining the resin A and the curing agent, stirring, pouring into a mould, and degassing; (b3) and curing the degassed material at a first temperature, and then curing at a second temperature to obtain the motor packaging material. Wherein, the stirring speed in the step (a3) is preferably 100-5000 r/min, preferably 500-1000 r/min; the stirring time is 0.1-2h, preferably 0.2-1 h. Preferably, the first temperature curing condition of step (b3) is a curing temperature of 70-90 ℃ and a curing time of 1-9 hours, preferably the first curing temperature is 75-85 ℃ and the curing time is 3-8 hours. The second temperature curing condition in the step (b3) is preferably that the curing temperature is 110-150 ℃ and the curing time is 8-15h, and the second curing temperature is preferably 120-135 ℃ and the curing time is 10-13 h.
On the other hand, the invention provides a high-performance motor packaging material prepared by the preparation method.
On the other hand, the invention provides application of the high-performance motor packaging material, and the high-performance motor packaging material is applied to the field of motor packaging as the motor packaging material.
The beneficial technical effects are as follows:
after the surface treatment is carried out on the powder, the property of the powder interface can be improved and changed, and the affinity between the powder and the organic polymer material is improved; the dispersibility and the fluidity in the organic polymer material are improved, the various performances of the product are enhanced, and the functional effect is achieved; the addition of powder is increased, the product grade is improved, and the product cost is reduced. The combination of the acrylic polyurethane resin and the toughening agent can effectively improve the toughness of the system, the acrylic polyurethane resin and the toughening agent synergistically enhance the toughness of the material, and meanwhile, the material can be ensured to have good tensile strength and high glass transition temperature. The curing agent can further improve the toughness of the system, and the methyl tetrahydrophthalic anhydride and the polyethylene glycol monooleate can further balance the tensile strength and toughness effect of the material.
The tensile strength of the motor packaging material can reach 93.8MPa, and the impact strength reaches 38.1KJ × m-2The glass-transition temperature is high, the heat resistance is good, and the cracking is avoided at low temperature.
The specific implementation mode is as follows:
the present invention will be described in detail below with reference to specific embodiments and examples, and the advantages and various effects of the present invention will be more clearly apparent therefrom. It will be understood by those skilled in the art that these specific embodiments and examples are for the purpose of illustrating the invention and are not to be construed as limiting the invention.
Throughout the specification, unless otherwise specifically noted, terms used herein should be understood as having meanings as commonly used in the art. Accordingly, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. If there is a conflict, the present specification will control.
Unless otherwise specifically indicated, various raw materials, reagents, instruments, equipment and the like used in the present invention may be commercially available or may be prepared by existing methods.
Example 1:
a preparation method of a high-performance motor packaging material comprises the following steps: (1): preparing resin A; (2): preparing a curing agent; (3): the action process of the resin and the curing agent;
the preparation process of the resin A in the step (1) comprises the following steps: (a) adding 40 g of 3, 4-epoxyhexylmethyl-3, 4-epoxycyclohexyl formate, 8 g of acrylic polyurethane resin T20D, 9 g of toughening agent EPC-205 and 0.1 g of coupling agent gamma- (2, 3-epoxypropoxy) propyl trimethoxy silane into a container, and uniformly stirring; (b) when the liquid feed liquid is fully and uniformly stirred and no obvious cluster substance exists, adding 55 g of novel functional filling powder and 0.2 g of anti-settling agent bentonite while stirring, and continuously stirring; wherein, the stirring speed and the stirring time in the steps (a) and (b) are both 500 revolutions per minute and 0.5 h;
the preparation process of the curing agent in the step (2) comprises the following steps: (a1) adding 70 g of methyl tetrahydrophthalic anhydride, 7 g of polyether polyol polyethylene glycol monooleate and 0.2 g of promoter benzyldimethylamine into a container, and stirring and reacting for 4 hours at the temperature of 140 ℃; (b1) adding 55 g of novel functional filling powder and 0.1 g of bentonite as an anti-settling agent while stirring, and continuously stirring for 4 hours to obtain a curing agent; wherein the stirring rotation speed of the steps (a1) and (b1) is 600 revolutions per minute; the stirring reaction temperature of the step (a1) is preferably 150 ℃, and the stirring reaction time is 6 hours; the stirring time of the step (b1) is 0.4 h;
the preparation process in the step (3) comprises the following steps: (a3) combining the resin A and the curing agent, stirring, pouring into a mold, and degassing; (b3) curing the degassed material at a first temperature, and then curing at a second temperature to obtain a motor packaging material; wherein the stirring speed in the step (a3) is 500 rpm; stirring for 1 h; the first temperature curing condition of the step (b3) is that the curing temperature is 85 ℃ and the curing time is 3 hours; step (b3) second temperature curing conditions of curing temperature of 120 and curing time of 13 h;
the preparation method of the novel functional filling powder used in the steps (1) and (2) comprises the following steps: putting the powder in a container, spraying the coupling agent A-151 while stirring, and then putting in an oven at 120 ℃ for baking for 8 hours; the mass ratio of the powder to the coupling agent is 100: 1.
example 2:
a preparation method of a high-performance motor packaging material comprises the following steps: (1): preparing resin A; (2): preparing a curing agent; (3): the action process of the resin and the curing agent;
the preparation process of the resin A in the step (1) comprises the following steps: (a) adding 45 g of 3, 4-epoxyhexylmethyl-3, 4-epoxycyclohexyl formate, 9 g of acrylic polyurethane resin Easepi U600, 10 g of toughening agent EPC-205 and 0.3 g of coupling agent gamma- (2, 3-epoxypropoxy) propyl trimethoxy silane into a container, and uniformly stirring; (b) when the liquid feed liquid is fully and uniformly stirred and no obvious cluster is generated, adding 54 g of novel functional filling powder and 0.1 g of anti-settling agent bentonite while stirring, and continuing stirring; wherein, the stirring speed and the stirring time in the steps (a) and (b) are both 500 revolutions per minute and 0.5 h;
the preparation process of the curing agent in the step (2) comprises the following steps: (a1) adding 59 g of methyl tetrahydrophthalic anhydride, 6 g of polyether polyol polyethylene glycol monooleate and 0.3 g of accelerator 2-methylimidazole into a container, and stirring and reacting for 4 hours at the temperature of 140 ℃; (b1) adding 53 g of novel functional filling powder and 0.2 g of anti-settling agent bentonite while stirring, and continuously stirring for 4 hours to obtain a curing agent; wherein the stirring rotation speed of the steps (a1) and (b1) is 600 revolutions per minute; the stirring reaction temperature of the step (a1) is preferably 150 ℃, and the stirring reaction time is 6 hours; the stirring time of the step (b1) is 0.4 h;
the preparation process in the step (3) comprises the following steps: (a3) combining the resin A and the curing agent, stirring, pouring into a mold, and degassing; (b3) curing the degassed material at a first temperature, and then curing at a second temperature to obtain a motor packaging material; wherein the stirring speed in the step (a3) is 500 rpm; stirring for 1 h; the first temperature curing condition of the step (b3) is that the curing temperature is 85 ℃ and the curing time is 3 hours; the second temperature curing condition of the step (b3) is that the curing temperature is 120 ℃ and the curing time is 13 h;
the preparation method of the novel functional filling powder used in the steps (1) and (2) comprises the following steps: putting the powder into a container, spraying a coupling agent A-171 while stirring, and then putting into a 120 ℃ oven for baking for 8 hours; the mass ratio of the powder to the coupling agent is 100: 1.
Example 3:
a preparation method of a high-performance motor packaging material comprises the following steps: (1): preparing resin A; (2): preparing a curing agent; (3): the action process of the resin and the curing agent;
the preparation process of the resin A in the step (1) comprises the following steps: (a) adding 35 g of 3, 4-epoxyhexylmethyl-3, 4-epoxycyclohexyl formate, 5 g of acrylic polyurethane resin SW2200, 12 g of flexibilizer EPC-205 and 0.05 g of coupling agent gamma- (2, 3-epoxypropoxy) propyl trimethoxy silane into a container, and uniformly stirring; (b) when the liquid feed liquid is fully and uniformly stirred and no obvious agglomerate exists, 53 g of novel functional filling powder and 0.5 g of anti-settling agent bentonite are added while stirring, and stirring is continued; wherein, the stirring speed and the stirring time in the steps (a) and (b) are both 500 revolutions per minute and 0.5 h;
the preparation process of the curing agent in the step (2) comprises the following steps: (a1) adding 45 g of methyl tetrahydrophthalic anhydride, 2 g of polyether polyol polyethylene glycol monooleate and 0.05 g of accelerator cyanoimidazole into a container, and stirring and reacting for 4 hours at the temperature of 140 ℃; (b1) adding 53 g of novel functional filling powder and 0.05 g of anti-settling agent bentonite while stirring, and continuously stirring for 4 hours to obtain a curing agent; wherein the stirring rotation speed of the steps (a1) and (b1) is 600 revolutions per minute; the stirring reaction temperature of the step (a1) is preferably 150 ℃, and the stirring reaction time is 6 hours; the stirring time of the step (b1) is 0.4 h;
the preparation process in the step (3) comprises the following steps: (a3) combining the resin A and the curing agent, stirring, pouring into a mold, and degassing; (b3) curing the degassed material at a first temperature, and then curing at a second temperature to obtain a motor packaging material; wherein the stirring speed in step (a3) is 500 rpm; stirring for 1 h; the first temperature curing condition of the step (b3) is that the curing temperature is 85 ℃ and the curing time is 3 hours; the second temperature curing condition of the step (b3) is that the curing temperature is 120 ℃ and the curing time is 13 h;
the preparation method of the novel functional filling powder used in the steps (1) and (2) comprises the following steps: putting the powder into a container, spraying the coupling agent A-1706 while stirring, and then putting the powder into an oven at 120 ℃ for baking for 8 hours; the mass ratio of the powder to the coupling agent is 100: 1.
Comparative example 1: based on example 2, the toughening agent EPC-205 is not used, and the rest is not changed.
Comparative example 2: in addition to example 2, the acrylic urethane resin easipi U600 was not used, and the others were not changed.
Comparative example 3: on the basis of example 2, the dosage of the acrylic polyurethane resin Easepi U600 is changed to 3 g, the dosage of the toughening agent EPC-205 is changed to 25 g, and the rest is not changed.
Comparative example 4: based on example 2, EPC-205 was replaced with tea polyphenols, all other things being unchanged.
Comparative example 5: on the basis of the embodiment 2, the powder is used for replacing the novel functional filling powder, and the rest is not changed.
Comparative example 6: on the basis of the embodiment 2, the novel functional filling powder is not used, and the rest is not changed.
Comparative example 7: on the basis of example 2, methyl tetrahydrophthalic anhydride was not used, and the others were not changed.
Comparative example 8: based on example 2, polyethylene glycol monooleate was not used, and the others were not changed.
Comparative example 9: based on the embodiment 2, the polyethylene glycol monooleate is replaced by PEG1000, and the rest are not changed.
The test results of the tests of the examples and comparative examples of the invention are as follows:
the tensile strength test is carried out by the method described in GBT 1040.2-2006. The impact strength test was carried out with reference to the method described in GBT 1843-2008. All tests were performed using differential scanning calorimetry. Low temperature Performance test methods the test was carried out with reference to the method described in GB 1035-70.
The tests show that the tensile strength of the motor packaging material can reach 93.8MPa, and the impact strength reaches 38.1KJ × m-2The glass-transition temperature is high, the heat resistance is good, and the cracking is avoided at low temperature. The invention is significantly improved in tensile strength, impact strength, glass transition temperature and cracking effect compared to the comparative examples.
Finally, it should be further noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. A preparation method of a high-performance motor packaging material is characterized by comprising the following steps: the method comprises the following steps: (1): preparing resin A; (2): preparing a curing agent; (3): the action process of the resin and the curing agent is used for obtaining the high-performance motor packaging material; the mass ratio of the resin A to the curing agent is as follows: 1: 0.7-1.3;
wherein, the raw materials for preparing the resin A in the step (1) comprise 3, 4-epoxy hexyl methyl-3, 4-epoxy cyclohexyl formic ether, acrylic polyurethane resin, a flexibilizer, a novel functional filling agent, an anti-settling agent and a coupling agent; the preparation process in the step (1) comprises the following steps: (a) adding 3, 4-epoxy hexyl methyl-3, 4-epoxy cyclohexyl formic ether, acrylic polyurethane resin, toughening agent and coupling agent into a container, and uniformly stirring; (b) adding the novel functional filling powder and the anti-settling agent, and continuing stirring;
the raw materials prepared by the curing agent in the step (2) contain methyl tetrahydrophthalic anhydride, polyether polyol, novel functional filling powder, an anti-settling agent and an accelerator; the preparation process in the step (2) comprises the following steps: (a1) adding methyl tetrahydrophthalic anhydride, polyether polyol and an accelerant into a container and stirring; (b1) adding the novel functional filling powder and the anti-settling agent while stirring to obtain a curing agent;
the process of the step (3) comprises the following steps: (a3) combining the resin A and the curing agent, stirring, pouring into a mold, and degassing; (b3) and curing the degassed material at a first temperature, and then curing at a second temperature to obtain the motor packaging material.
2. The method for preparing a high-performance motor encapsulating material according to claim 1, characterized in that: in the step (1), the mass parts of the 3, 4-epoxyhexylmethyl-3, 4-epoxycyclohexyl formate are 0.1-50, the mass parts of the acrylic polyurethane resin are 0.1-10, the mass parts of the toughening agent are 4-20, the mass parts of the novel functional filling powder are 35-65, the mass parts of the anti-settling agent are 0.001-2 and the mass parts of the coupling agent are 0.001-2.
3. The method for preparing a high-performance motor encapsulating material as claimed in any one of claims 1 to 2, wherein: the acrylic polyurethane resin is bifunctional urethane acrylate, and preferably, the acrylic polyurethane resin is T20D, Easepi U600, SW2200, THUNCHEM T21.
4. A method for preparing a high-performance motor packaging material as claimed in any one of claims 1 to 3, wherein: the toughening agent is EPC-205; preferably, the coupling agent is gamma- (2, 3-glycidoxy) propyltrimethoxysilane.
5. The method for preparing a high-performance motor encapsulating material as claimed in any one of claims 1 to 4, wherein: in the step (2), the mass parts of the methyl tetrahydrophthalic anhydride, the polyether polyol, the novel functional filling powder and the accelerator are 40-99 parts, 0.01-12 parts, 35-65 parts, 0.001-2 parts and 0.001-2 parts respectively.
6. The method for preparing a high-performance motor encapsulating material as claimed in any one of claims 1 to 5, wherein: the polyether polyol is polyethylene glycol monooleate; preferably, the accelerator is at least one of benzyldimethylamine, cyanoimidazole, 2-methylimidazole and 2-methyl-4-ethylimidazole.
7. The method for preparing a high-performance motor encapsulating material as claimed in any one of claims 1 to 6, wherein: the anti-settling agent used in the steps (1) and (2) is bentonite; the preparation method of the novel functional filling powder comprises the following steps: placing the powder in a container, spraying a coupling agent while stirring, and then placing at 100-150 ℃ for baking for 2-20 h; the mass ratio of the powder to the coupling agent is 100: 0.01-10; the coupling agent is selected from: at least one of A-151, A-1120, A-171, A-174, A-1706, and A-187.
8. The method for preparing a high-performance motor encapsulating material as claimed in any one of claims 1 to 7, wherein: the stirring speed and the stirring time in the steps (a) and (b) are respectively 100-5000 rpm and 0.1-4 h;
preferably, the step (a1) is stirred and reacted for 1-10h at the temperature of 120-200 ℃, the stirring time of the step (b1b) is 0.1-5h, and the stirring rotating speeds of the step (a1) and the step (b1) are both 100-5000 r/min; preferably, the stirring speed in the step (a3) is 100-5000 r/min, and the stirring time is 0.1-2 h.
Preferably, the first temperature curing condition of the step (b3) is that the curing temperature is 70-90 ℃ and the curing time is 1-9 h; the second temperature curing condition of the step (b3) is preferably a curing temperature of 110-150 ℃ and a curing time of 8-15 h.
9. The high-performance motor packaging material obtained by the preparation method of the high-performance motor packaging material according to any one of claims 1 to 8.
10. The use of the high-performance motor encapsulating material obtained by the method of preparing a high-performance motor encapsulating material according to any one of claims 1 to 8, wherein: the high-performance motor packaging material is applied to the field of motor packaging.
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105255429A (en) * | 2015-10-30 | 2016-01-20 | 浙江港流高分子科技有限公司 | Floor caulking agent, preparation method of floor caulking agent and application of floor caulking agent |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105255429A (en) * | 2015-10-30 | 2016-01-20 | 浙江港流高分子科技有限公司 | Floor caulking agent, preparation method of floor caulking agent and application of floor caulking agent |
Non-Patent Citations (1)
| Title |
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| 何曼君 等: "高分子物理", vol. 3, 复旦大学出版社, pages: 213 - 217 * |
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