CN112300711A - Glue special for VCM motor and preparation method thereof - Google Patents
Glue special for VCM motor and preparation method thereof Download PDFInfo
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- CN112300711A CN112300711A CN202011295343.7A CN202011295343A CN112300711A CN 112300711 A CN112300711 A CN 112300711A CN 202011295343 A CN202011295343 A CN 202011295343A CN 112300711 A CN112300711 A CN 112300711A
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- epoxy resin
- glue
- vcm motor
- polyurethane
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J4/00—Adhesives based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; adhesives, based on monomers of macromolecular compounds of groups C09J183/00 - C09J183/16
- C09J4/06—Organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond in combination with a macromolecular compound other than an unsaturated polymer of groups C09J159/00 - C09J187/00
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
Abstract
The invention belongs to the technical field of adhesives, and particularly relates to a special adhesive for a VCM (vinyl chloride monomer) motor, which comprises the following components in parts by mass: 10-30 parts of prepolymer, 5-15 parts of reactive diluent, 5-10 parts of photoinitiator, 5-15 parts of thermal curing agent, 2-5 parts of filler, 1-5 parts of thickening agent and 0.5-2 parts of stabilizer; the prepolymer comprises polyurethane modified epoxy resin and alicyclic epoxy resin, and the polyurethane modified epoxy resin is prepared by reacting hydroxyl-terminated modified polyurethane prepolymer with epoxy resin. The invention provides a special glue for a VCM motor, which adopts a UV + heating curing dual curing system, firstly dries the surface of a glue layer through UV curing, rapidly shapes the glue layer, and then completely cures the glue layer through heating curing, thereby improving the bonding strength. In addition, the network interpenetrating structure is generated by the reaction of the polyurethane and the epoxy resin, so that the toughness of the polyurethane is enhanced.
Description
Technical Field
The invention belongs to the technical field of adhesives, and particularly relates to a special adhesive for a VCM (vinyl chloride monomer) motor and a preparation method thereof.
Background
The VCM motor, otherwise known as voice coil motor, is similar in principle to a loudspeaker. The VCM motor is a direct drive motor of a special type, and has the characteristics of simple structure, small volume, fast response, and the like. The VCM motor has a wide application range, and is mainly used in cameras of portable computers, network cameras, video monitors, scanners, mobile phones and other devices, and the main function is focusing.
The automatic focusing function is realized by locking the camera into the VCM motor, the VCM motor mainly comprises a coil, a magnet group, an elastic sheet, a gasket and the like, and the fixation of the magnet, the elastic sheet, the gasket and the like in the VCM of the voice coil motor needs to be realized by glue. This requires the glue to have high bond strength, good electrical insulation properties, solvent resistance, impact resistance, low stress, low shrinkage, etc.
The existing adhesive for the VCM motor is generally subjected to thermosetting, needs high-temperature baking at the temperature of over 100 ℃ for a long time, can cause element loss, improves the reject ratio of products, and easily causes the problems of glue overflow, precipitation, slippage dislocation, volatile substances and the like in the dispensing process, thereby causing the consequences of low production efficiency, poor operability, low yield and the like.
In addition, the prepolymer used by the existing adhesive for the VCM motor is bisphenol A epoxy resin, a molecular main chain of the prepolymer contains a large number of rigid benzene rings, a cured product is high in crosslinking density and shrinkage rate, the stress of a glue layer is difficult to release, the adhesive force is low, the toughness is poor, the adhesive is easy to crack, and the requirements of a drop test cannot be met. Particularly, the existing new process for preparing AA has high technical and performance requirements, and the existing single-component epoxy resin thermosetting adhesive cannot meet the requirements of the new process.
In view of the above, it is necessary to provide a technical solution to solve the above technical problems.
Disclosure of Invention
One of the objects of the present invention is: aiming at the defects of the prior art, the special glue for the VCM motor is provided, on one hand, the glue can be cured by UV and hot, and the problems of large shrinkage rate, glue overflow, precipitation, slippage and dislocation and volatile substances of the existing product are solved. On the other hand, the adhesive effect can be improved, and the problems of low adhesive force, poor toughness and easy cracking are solved.
In order to achieve the purpose, the invention adopts the following technical scheme:
a special glue for a VCM motor comprises the following components in parts by mass: 10-30 parts of prepolymer, 5-15 parts of reactive diluent, 5-10 parts of photoinitiator, 5-15 parts of thermal curing agent, 2-5 parts of filler, 1-5 parts of thickening agent and 0.5-2 parts of stabilizer; the prepolymer comprises polyurethane modified epoxy resin and alicyclic epoxy resin, and the polyurethane modified epoxy resin is prepared by reacting hydroxyl-terminated modified polyurethane prepolymer with epoxy resin.
It should be noted that the polyurethane chain segment is randomly interpenetrated in the epoxy resin chain segment to form an interpenetrating network structure or a semi-interpenetrating network structure. Because of the different solubility of polyurethane and epoxy resin, there are different degrees of phase separation in the system, but the molecular chain segments are "forced to be compatible" through mutual entanglement, so that the compatibility is improved. The chain segments are independent and interpenetrated, the two-phase interface with good compatibility is fuzzy, and the two-phase interface with poor compatibility is clear. When the chain segments are acted by external force, the stress can be mutually transmitted among the chain segments, so that the chain segments are dispersed more uniformly. Meanwhile, relative sliding motion can occur between chain segments, so that more energy is needed for destroying the IPN structure, and the capability of the polymer for resisting external force is enhanced. In addition, after the polymer is subjected to a curing reaction, the phase regions in the structure are fixed. When the composite material is damaged by external force, the two phases can play a role of mutual synergy, and the 'positive synergy' enables the comprehensive performance of the crosslinked network to be improved.
As an improvement of the special glue for the VCM motor, the alicyclic epoxy resin is UVR-6110.
As an improvement of the special glue for the VCM motor, the reactive diluent is at least one of 4-hydroxybutyl vinyl ether (HBVE) and vinyl diglycol ether (DEGVE).
As an improvement of the special glue for the VCM motor, the photoinitiator comprises 6-cumeneferrocenium hexafluorophosphate.
As an improvement of the VCM motor specific paste according to the present invention, the thermal curing agent includes boron trifluoride-monoethylamine complex (BF 3-MEA).
As an improvement of the glue specially used for the VCM motor, the filler includes at least one of calcium silicate, magnesium oxide, titanium dioxide, aluminum trioxide, calcium carbonate, boron nitride, and silicon dioxide.
As an improvement of the VCM motor specific glue according to the present invention, the stabilizer includes at least one of zinc dialkyldithiophosphate, zinc dialkyldithiocarbamate and N-phenyl- α -naphthylamine.
As an improvement of the special glue for the VCM motor, the thickener includes white carbon black.
Another object of the present invention is to provide a method for preparing a glue for a VCM motor, which comprises the following steps:
s1, mixing polyether polyol and isobornyl acrylate, adding 4,4' -dicyclohexylmethane diisocyanate, and adding a catalyst to obtain a first reactant;
s2, adding a polyurethane prepolymer, epoxy resin and a catalyst into the first reactant, and after reaction, vacuumizing and cooling to obtain polyurethane modified epoxy resin;
s3, weighing the polyurethane modified epoxy resin, the alicyclic epoxy resin, the reactive diluent, the photoinitiator, the thermal curing agent, the filler, the thickening agent and the stabilizer, uniformly mixing, and then centrifuging and defoaming to prepare the special VCM motor glue.
The beneficial effects of the invention include but are not limited to: the invention provides a special glue for a VCM motor, which adopts a UV + heating curing dual curing system, firstly dries the surface of a glue layer through UV curing, rapidly shapes the glue layer, and then completely cures the glue layer through thermal curing, thereby improving the bonding strength. In addition, the network interpenetrating structure is generated by the reaction of the polyurethane and the epoxy resin, so that the toughness of the polyurethane is enhanced.
According to the invention, a polyurethane prepolymer terminated by-NCO is synthesized through the reaction of-OH in polyether diol and-NCO in HMDI, then the polyurethane prepolymer is reacted with secondary-OH in epoxy resin to synthesize polyurethane modified epoxy resin, and then the polyurethane modified epoxy resin and alicyclic epoxy resin are used as prepolymers, and other components are added to prepare the UV + heating cured dual-curing adhesive which has the advantages of low CTE, low shrinkage, low-temperature curing and UV curing, good bonding property and good weather resistance, and can meet the requirement of large-scale industrial production of VCM motors.
Detailed Description
In order to make the technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to specific embodiments, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
The embodiment provides a special glue for a VCM motor, and the preparation method comprises the following steps:
s1, mixing polyether polyol and isobornyl acrylate, adding 4,4' -dicyclohexylmethane diisocyanate, and adding a catalyst to obtain a first reactant;
s2, adding a polyurethane prepolymer, epoxy resin and a catalyst into the first reactant, and after reaction, vacuumizing and cooling to obtain polyurethane modified epoxy resin;
s3, weighing 20 parts of polyurethane modified epoxy resin, 10 parts of alicyclic epoxy resin, 10 parts of reactive diluent, 10 parts of photoinitiator, 10 parts of thermal curing agent, 3 parts of filler, 3 parts of thickener and 1 part of stabilizer, uniformly mixing, and centrifuging and defoaming to prepare the special VCM motor adhesive.
Wherein, the alicyclic epoxy resin is UVR-6110. The reactive diluent is 4-hydroxybutyl vinyl ether. The photoinitiator is 6-isopropylbenzene cyclopentadienyl iron hexafluorophosphate. The thermal curing agent is boron trifluoride-monoethylamine complex. The fillers are calcium silicate, magnesium oxide and titanium dioxide. The thickening agent is white carbon black.
Example 2
The present embodiment provides a glue for a VCM motor, which is different from embodiment 1 in S3: weighing 20 parts of polyurethane modified epoxy resin, 5 parts of alicyclic epoxy resin, 15 parts of reactive diluent, 5 parts of photoinitiator, 15 parts of thermal curing agent, 2 parts of filler, 1 part of thickening agent and 0.5 part of stabilizer, uniformly mixing, and then centrifuging and defoaming to prepare the special VCM motor glue.
Wherein, the alicyclic epoxy resin is UVR-6110. The reactive diluent is at least one of vinyl diglycol ether. The photoinitiator is 6-isopropylbenzene cyclopentadienyl iron hexafluorophosphate. The thermal curing agent is boron trifluoride-monoethylamine complex. The filler is calcium silicate and magnesium oxide. The thickening agent is white carbon black.
The rest is the same as embodiment 1, and the description is omitted here.
Example 3
The present embodiment provides a glue for a VCM motor, which is different from embodiment 1 in S3: weighing 10 parts of polyurethane modified epoxy resin, 10 parts of alicyclic epoxy resin, 5 parts of reactive diluent, 10 parts of photoinitiator, 5 parts of thermal curing agent, 2 parts of filler, 5 parts of thickening agent and 2 parts of stabilizer, uniformly mixing, and then performing centrifugal deaeration to prepare the special VCM motor glue.
Wherein, the alicyclic epoxy resin is UVR-6110. The reactive diluent is vinyl diglycol ether and 4-hydroxybutyl vinyl ether. The photoinitiator is 6-isopropylbenzene cyclopentadienyl iron hexafluorophosphate. The thermal curing agent is boron trifluoride-monoethylamine complex. The fillers are boron nitride and silicon dioxide. The thickening agent is white carbon black.
The rest is the same as embodiment 1, and the description is omitted here.
Comparative example 1
A commercially available VCM motor paste was taken as a comparative example.
The VCM motor glues of examples 1-3 and comparative example 1 were UV + heat cured and the following curing performance test, peel strength test and thermal expansion coefficient test were performed:
the test results are shown in Table 1.
TABLE 1
As can be seen from Table 1, the special glue for the VCM motor is prepared by adopting a UV + heating curing dual-curing system, firstly performing UV curing to dry the surface of a glue layer, quickly setting, and then performing thermal curing to completely cure the glue layer, so that the bonding strength is improved. In addition, the network interpenetrating structure is generated by the reaction of the polyurethane and the epoxy resin, so that the toughness of the polyurethane is enhanced.
The foregoing description shows and describes several preferred embodiments of the invention, but as aforementioned, it is to be understood that the invention is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as expressed herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. The special glue for the VCM motor is characterized by comprising the following components in parts by mass: 10-30 parts of prepolymer, 5-15 parts of reactive diluent, 5-10 parts of photoinitiator, 5-15 parts of thermal curing agent, 2-5 parts of filler, 1-5 parts of thickening agent and 0.5-2 parts of stabilizer; the prepolymer comprises polyurethane modified epoxy resin and alicyclic epoxy resin, and the polyurethane modified epoxy resin is prepared by reacting hydroxyl-terminated modified polyurethane prepolymer with epoxy resin.
2. The glue dedicated to a VCM motor according to claim 1, wherein said cycloaliphatic epoxy resin is UVR-6110.
3. The glue dedicated to a VCM motor according to claim 1, wherein said reactive diluent is at least one of 4-hydroxybutyl vinyl ether and vinyl diglycol ether.
4. The glue dedicated to a VCM motor according to claim 1, wherein said photoinitiator comprises 6-cumeneferrocenium hexafluorophosphate.
5. A VCM motor specific glue according to claim 1, wherein said thermal curing agent comprises boron trifluoride-monoethylamine complex.
6. The paste for a VCM motor according to claim 1, wherein said filler comprises at least one of calcium silicate, magnesium oxide, titanium dioxide, aluminum trioxide, calcium carbonate, boron nitride, and silicon dioxide.
7. The VCM motor specific glue of claim 1, wherein the stabilizer comprises at least one of zinc dialkyldithiophosphate, zinc dialkyldithiocarbamate and N-phenyl- α -naphthylamine.
8. The glue special for a VCM motor according to claim 1, wherein said thickener comprises white carbon black.
9. A preparation method of the glue special for the VCM motor as claimed in any one of claims 1 to 8, characterized by comprising the following steps:
s1, mixing polyether polyol and isobornyl acrylate, adding 4,4' -dicyclohexylmethane diisocyanate, and adding a catalyst to obtain a first reactant;
s2, adding a polyurethane prepolymer, epoxy resin and a catalyst into the first reactant, and after reaction, vacuumizing and cooling to obtain polyurethane modified epoxy resin;
s3, weighing the polyurethane modified epoxy resin, the alicyclic epoxy resin, the reactive diluent, the photoinitiator, the thermal curing agent, the filler, the thickening agent and the stabilizer, uniformly mixing, and then centrifuging and defoaming to prepare the special VCM motor glue.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011295343.7A CN112300711A (en) | 2020-11-18 | 2020-11-18 | Glue special for VCM motor and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011295343.7A CN112300711A (en) | 2020-11-18 | 2020-11-18 | Glue special for VCM motor and preparation method thereof |
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| Publication Number | Publication Date |
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| CN112300711A true CN112300711A (en) | 2021-02-02 |
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| CN202011295343.7A Pending CN112300711A (en) | 2020-11-18 | 2020-11-18 | Glue special for VCM motor and preparation method thereof |
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Citations (6)
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| CN101798492A (en) * | 2010-02-22 | 2010-08-11 | 北京高盟新材料股份有限公司 | Preparation method of ultraviolet light curing composite binding agent |
| CN101824152A (en) * | 2010-04-13 | 2010-09-08 | 深圳职业技术学院 | Preparation method and application of resin having double curing groups |
| CN102079810A (en) * | 2010-12-15 | 2011-06-01 | 北京航空航天大学 | Synthesis and application of light-cured polyurethane-acrylic acid-epoxy resin adhesive |
| CN105419714A (en) * | 2014-09-09 | 2016-03-23 | 贵阳时代沃顿科技有限公司 | Epoxy resin two-component polyurethane adhesive and preparation method thereof |
| CN108395849A (en) * | 2018-03-21 | 2018-08-14 | 烟台泰盛精化科技有限公司 | A kind of UV/ heat dual curings adhesive and preparation method thereof |
| CN111073522A (en) * | 2019-12-04 | 2020-04-28 | 络合高新材料(上海)有限公司 | Special epoxy adhesive for bonding UV (ultraviolet) photocuring PVC (polyvinyl chloride) base materials |
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2020
- 2020-11-18 CN CN202011295343.7A patent/CN112300711A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101798492A (en) * | 2010-02-22 | 2010-08-11 | 北京高盟新材料股份有限公司 | Preparation method of ultraviolet light curing composite binding agent |
| CN101824152A (en) * | 2010-04-13 | 2010-09-08 | 深圳职业技术学院 | Preparation method and application of resin having double curing groups |
| CN102079810A (en) * | 2010-12-15 | 2011-06-01 | 北京航空航天大学 | Synthesis and application of light-cured polyurethane-acrylic acid-epoxy resin adhesive |
| CN105419714A (en) * | 2014-09-09 | 2016-03-23 | 贵阳时代沃顿科技有限公司 | Epoxy resin two-component polyurethane adhesive and preparation method thereof |
| CN108395849A (en) * | 2018-03-21 | 2018-08-14 | 烟台泰盛精化科技有限公司 | A kind of UV/ heat dual curings adhesive and preparation method thereof |
| CN111073522A (en) * | 2019-12-04 | 2020-04-28 | 络合高新材料(上海)有限公司 | Special epoxy adhesive for bonding UV (ultraviolet) photocuring PVC (polyvinyl chloride) base materials |
Non-Patent Citations (1)
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