CN110877303B - Organic ceramic grinding brush and preparation method thereof - Google Patents
Organic ceramic grinding brush and preparation method thereof Download PDFInfo
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- CN110877303B CN110877303B CN201911231813.0A CN201911231813A CN110877303B CN 110877303 B CN110877303 B CN 110877303B CN 201911231813 A CN201911231813 A CN 201911231813A CN 110877303 B CN110877303 B CN 110877303B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D13/00—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor
- B24D13/02—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by their periphery
- B24D13/10—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by their periphery comprising assemblies of brushes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D18/00—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for
- B24D18/0009—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for using moulds or presses
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D18/00—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for
- B24D18/0072—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for using adhesives for bonding abrasive particles or grinding elements to a support, e.g. by gluing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
- B24D3/02—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent
- B24D3/20—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially organic
- B24D3/28—Resins or natural or synthetic macromolecular compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
- B24D3/34—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties
- B24D3/342—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties incorporated in the bonding agent
- B24D3/344—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties incorporated in the bonding agent the bonding agent being organic
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D99/00—Subject matter not provided for in other groups of this subclass
- B24D99/005—Segments of abrasive wheels
Abstract
The invention provides a preparation method of an organic ceramic grinding brush, which comprises the following steps: (1) mixing an abrasive, acrylic hollow microspheres and an epoxy diluent, and filtering by using a screen to obtain a mixture A; (2) uniformly stirring liquid epoxy resin, phosphorus-containing modified epoxy resin, liquid amine curing agent, halogen-free flame retardant and thixotropic agent, and blending with the mixture A to obtain a mixture B; (3) the mixture B is subjected to hot pressing after being molded, and the organic combined ceramic grinding block is obtained after demolding; (4) bonding the organically combined ceramic grinding block with natural rubber by using an adhesive, and performing hot press molding to obtain a rubber substrate ceramic plate; (5) the side of the rubber-based ceramic plate containing natural rubber was wound around a support tube containing an elastic porous layer to prepare an organic ceramic brush. The organic ceramic grinding brush has the advantages of good grindability, excellent copper removal capability, long service life, good polishing effect, no halogen, environmental protection and excellent flame retardant effect. The invention also provides the organic ceramic grinding brush prepared by the preparation method.
Description
Technical Field
The invention relates to the technical field of ceramic grinding brush preparation, in particular to an organic ceramic grinding brush and a preparation method thereof.
Background
The rapid development of electronic circuits puts the emphasis on the promotion of high-precision standards, and the requirements and standards of PCB circuit board production and processing are also promoted because the semi-finished board needs to be subjected to surface grinding treatment in the reproduction and manufacturing process of the PCB circuit board industry so as to meet the technical requirements of different procedures. The traditional semi-finished PCB grinding treatment generally uses a non-woven fabric grinding brush, a nylon brush, an abrasive belt or a grinding wheel, however, although the product has great advantages in cost, the product is not enough to support the effect required by the semi-finished PCB processing grinding, the traditional product generally has the defects of scratching the board surface, insufficient grinding force, short service life, chipping and hole plugging and the like, the problems of the prior generation such as the conventional ceramic grinding brush are avoided in the using process, halogen is contained, flame retardance does not exist, the requirement of the halogen-free process of the PCB cannot be met, and the grinding effect needs to be improved. At present, the organic combined ceramic grinding tool used in the PCB circuit board grinding industry is prepared by curing phenolic resin at high temperature through curing agents such as hexamethylenetetramine and the like, and because the main material contains phenolic resin, toxic and harmful gases such as formaldehyde, phenol and the like can be generated in the manufacturing process, and the main material has the characteristic of difficulty in toughening, so that the final grinding brush cannot be used for a PCB semi-finished product board with the board thickness less than 0.2mm, and has great limitation.
Therefore, there is a need for an organic ceramic brush and a method for making the same that overcomes the above-mentioned deficiencies of the prior art.
Content of application
The invention aims to provide a preparation method of an organic ceramic grinding brush, and the organic ceramic grinding brush prepared by the method has the advantages of good grindability, excellent copper removal capability, long service life, good polishing effect, no halogen, environmental protection and excellent flame retardant effect.
The invention also aims to provide the organic ceramic grinding brush prepared by the preparation method.
In order to achieve the above object, the present invention provides a method for preparing an organic ceramic brush, comprising the steps of:
(1) mixing 40-85 parts of abrasive, 1-10 parts of acrylic hollow microspheres and 1-10 parts of epoxy diluent, uniformly stirring, and filtering by using a screen to obtain a mixture A;
(2) mixing and uniformly stirring 10-30 parts of liquid epoxy resin, 5-30 parts of phosphorus-containing modified epoxy resin, 5-20 parts of liquid amine curing agent, 3-8 parts of halogen-free flame retardant and 0.1-1 part of thixotropic agent, and then blending and uniformly stirring the mixture A to obtain a mixture B;
(3) after the mixture B is subjected to die filling, hot pressing is carried out, and the organic combined ceramic grinding block is obtained after demoulding;
(4) bonding the organically combined ceramic grinding block with natural rubber by using an adhesive, and performing hot press molding to obtain a rubber substrate ceramic plate;
(5) the side of the rubber-based ceramic plate containing natural rubber was wound around a support tube containing an elastic porous layer to prepare an organic ceramic brush.
Compared with the prior art, in the preparation method of the organic ceramic grinding brush, the acrylic acid hollow microspheres and the grinding material are uniformly stirred in the stirring barrel and filtered by the screen, so that irregular and uneven-size aggregates can be removed. Secondly, mixing and uniformly stirring the liquid epoxy resin, the phosphorus-containing modified epoxy resin, the liquid amine curing agent, the halogen-free flame retardant and the thixotropic agent, uniformly dispersing, finally mixing and uniformly stirring all the materials, and then putting the materials into a mold for molding. In the process, the liquid epoxy resin and the liquid amine curing agent are used as the adhesive, and the phosphorus-containing modified epoxy resin and the liquid amine curing agent are compounded for co-curing, so that the participation of phenolic resin in the reaction is eliminated, and meanwhile, the halogen-free flame retardant is adopted, so that no toxic and harmful gas is generated in the reaction process, and the health of staff and the sanitation of the environment are ensured. Particularly, the acrylic hollow microspheres are directly introduced into the foam holes, the foam holes can not change along with the temperature change within the range from normal temperature to 100 ℃, and the foam holes are fine, dense and uniform, and the multiplying power is controllable, so that the service life of the organic ceramic grinding brush is effectively prolonged, and the toughness of the organic ceramic grinding brush is improved. Therefore, the organic ceramic grinding brush prepared by the method has the advantages of good grindability, excellent copper removal capability, long service life, good polishing effect, no halogen, environmental protection and excellent flame retardant effect.
Preferably, the liquid epoxy resin has a viscosity of 8000-20000cps at 25 ℃. Further, the liquid epoxy resin includes at least one of liquid bisphenol a epoxy resin, liquid bisphenol F epoxy resin, and liquid phenol novolac epoxy resin.
Preferably, the phosphorus-containing modified epoxy resin has a phosphorus content of 3%.
Preferably, the structural formula of the phosphorus-containing modified epoxy resin is as follows:
or:
wherein n is 0 to 10. For example, n can be 0, 2, 3, 4, 5, 6, 7, 8, 9, 10.
Preferably, the viscosity of the liquid amine curing agent is 2000-12000cps at 25 ℃. Further, the liquid amine curing agent is selected from one or more of phenolic aldehyde amine, polyether amine, fatty amine, polyamide and alicyclic amine.
Preferably, the microsphere material of the acrylic hollow microsphere adopts polymethyl methacrylate, and the glass transition temperature is 100-110 ℃. The polymethyl methacrylate is more easily and uniformly dispersed in the system, and a single-particle dispersed phase is formed in the system, so that compared with rigid hollow glass and hollow alumina, the polymethyl methacrylate has excellent flexibility, and the service life of the organic ceramic grinding brush can be prolonged. Further, the particle diameter D of the acrylic acid hollow microsphere5010-40 μm, wall thickness of 1-5 μm, and density of 0.08-0.3g/cm3。
Preferably, the adhesive is a two-component epoxy adhesive, and the two components are alicyclic amine and dimer acid modified epoxy resin respectively. Further, the thickness of the adhesive is 10-50 um. Specifically, a layer of adhesive is coated on the surface of the natural rubber. And (3) bonding and curing the organically combined ceramic grinding block and the glued natural rubber under the pressure of 1-10 tons, and performing hot press molding to obtain the rubber substrate ceramic plate.
Preferably, before step (5), further comprising the steps of: and processing one side of the rubber substrate ceramic plate containing the organic combined ceramic grinding block, and cutting the organic combined ceramic grinding block into strips. Furthermore, the strip can be a square with the side length of 7-12mm, and can also be a rectangle. Of course oblong shapes may also be cut.
Preferably, the abrasive is selected from any one or more of green silicon carbide, black silicon carbide, alumina, silica, boron nitride, hollow silica and hollow alumina. Further, the particle diameter D of the abrasive50Is 1-120 μm. Preferably hollow silica or alumina hollow spheres. The introduction of the hollow silica or alumina hollow sphere can effectively improve the grinding force of the organic ceramic grinding tool.
Preferably, the halogen-free flame retardant is tris (hydroxymethyl) phosphonium oxide. Further, the phosphorous trimethyoxide is selected from 3500cps with a viscosity of 3000-3500cps at 25 deg.C, a phosphorous content of 16-18%, and a density of 1.2-1.4g/cm3The hydroxyl value is 150-190 KOH/g.
Preferably, the mixture B in the step (3) is subjected to hot press molding in a hot press after being molded to obtain the organic bonded ceramic grinding block, wherein the molding hot press pressure is 5-100 tons, and the molding temperature is 50-150 ℃.
Preferably, the supporting pipe is made of bakelite pipe.
Preferably, the elastic porous layer is made of EVA sponge.
Preferably, the epoxy diluent is selected from trimethylolpropane triglycidyl ether or 1, 4-butanediol diglycidyl ether.
Preferably, the thixotropic agent may be any one selected from the group consisting of organobentonite, polyvinyl alcohol, fumed silica, and hydrogenated castor oil.
Correspondingly, the invention also provides the organic ceramic grinding brush prepared by the preparation method of the organic ceramic grinding brush.
Drawings
FIG. 1 is a schematic view of the structure of an organic ceramic brush according to the present invention.
FIG. 2 is a partial front view of the organo-ceramic brush shown in FIG. 1.
Detailed Description
To explain technical aspects, structural features, and technical effects of the present invention in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with specific embodiments.
Referring to fig. 1-2, the organic ceramic polishing brush 100 of the present invention includes a support tube 10, an elastic porous layer 30 covering the surface of the support tube 10, a natural rubber layer 50 covering the surface of the elastic porous layer 30, and an organic bonded ceramic polishing block 90 covering the surface of the natural rubber layer 50, wherein the natural rubber layer 50 and the organic bonded ceramic polishing block 90 are bonded and fixed by an adhesive layer 70. In the present embodiment, the support tube 10 may be a bakelite tube, but not limited thereto, for example, the support tube 10 may also be a phenolic paper tube. The elastic porous layer 30 is made of a foam tube and an EVA sponge material, and preferably, the hardness of the elastic porous layer 30 is Shore A25-40. Further, the organically bonded ceramic abrasive block 90 may be cut into a shape. The cutting die is cut into strips in the embodiment, and the strips can be squares with the side length of 7-12mm or rectangles. Of course oblong shapes may also be cut.
The preparation method of the organic ceramic grinding brush comprises the following steps:
(1) mixing 40-85 parts of abrasive, 1-10 parts of acrylic hollow microspheres and 1-10 parts of epoxy diluent, uniformly stirring, and filtering by using a screen to obtain a mixture A;
(2) mixing and uniformly stirring 10-30 parts of liquid epoxy resin, 5-30 parts of phosphorus-containing modified epoxy resin, 5-20 parts of liquid amine curing agent, 3-8 parts of halogen-free flame retardant and 0.1-1 part of thixotropic agent, and then blending and uniformly stirring the mixture A to obtain a mixture B;
(3) after the mixture B is subjected to die filling, hot pressing is carried out, and the organic combined ceramic grinding block is obtained after demoulding;
(4) bonding the organically combined ceramic grinding block with natural rubber by using an adhesive, and performing hot press molding to obtain a rubber substrate ceramic plate;
(5) the side of the rubber-based ceramic plate containing natural rubber was wound around a support tube containing an elastic porous layer to prepare an organic ceramic brush.
The method of making the organic ceramic brush of the present invention will now be described in detail with reference to specific examples, all of which are commercially available.
Example 1
A preparation method of an organic ceramic grinding brush comprises the following steps:
(1) mixing 60 parts of green silicon carbide, 5 parts of acrylic acid hollow microspheres and 1 part of trimethylolpropane triglycidyl ether, uniformly stirring by using a stirrer, and filtering out agglomerates by using a 50-mesh screen to obtain a mixture A;
(2) adding 30 parts of liquid bisphenol F epoxy resin, 15 parts of phosphorus-containing modified epoxy resin, 15 parts of polyamide curing agent, 4 parts of phosphorus trimethylol oxide and 0.5 part of organic bentonite into a stirrer, uniformly mixing and stirring, then blending with the mixture A, and stirring for 5 minutes by adopting a double-planet stirrer to obtain a mixture B;
(3) filling the mixture B into a mold, carrying out hot pressing in a hot press at the temperature of 100 ℃ for 20 minutes, and cooling and demolding to obtain an organic bonded ceramic grinding block;
(4) coating a layer of bi-component epoxy adhesive on the surface of natural rubber, and hot-pressing the organically-combined ceramic grinding block and the glued natural rubber in a hot press at the hot-pressing temperature of 100 ℃ for 15 minutes under the pressure of 5 tons to obtain the rubber substrate ceramic plate.
(5) The side of the rubber-based ceramic plate containing the organically bonded ceramic grinding block was machined and the organically bonded ceramic grinding block was cut into 8mm squares. Winding one side of the rubber substrate ceramic plate containing natural rubber on a bakelite tube containing EVA sponge and cloth-sandwiched rubber reinforcing materials to prepare the organic ceramic grinding brush,
wherein the structural formula of the phosphorus-containing modified epoxy resin is as follows:
wherein n is 2.
Example 2
A preparation method of an organic ceramic grinding brush comprises the following steps:
(1) mixing 40 parts of silicon dioxide, 2 parts of acrylic acid hollow microspheres and 5 parts of trimethylolpropane triglycidyl ether, uniformly stirring by using a stirrer, and filtering out agglomerates by using a 50-mesh screen to obtain a mixture A;
(2) adding 20 parts of liquid bisphenol A epoxy resin, 30 parts of phosphorus-containing modified epoxy resin, 5 parts of alicyclic amine curing agent, 6 parts of phosphorus trimethylol oxide and 0.8 part of hydrogenated castor oil into a stirrer, uniformly mixing and stirring, then blending with the mixture A, and stirring for 7 minutes by adopting a double-planet stirrer to obtain a mixture B;
(3) filling the mixture B into a mold, carrying out hot pressing in a hot press at the temperature of 100 ℃ for 20 minutes, and cooling and demolding to obtain an organic bonded ceramic grinding block;
(4) coating a layer of bi-component epoxy adhesive on the surface of natural rubber, and hot-pressing the organically-combined ceramic grinding block and the glued natural rubber in a hot press at the hot-pressing temperature of 80 ℃, for 20 minutes and under the pressure of 5 tons to obtain the rubber-based ceramic plate.
(5) The side of the rubber-based ceramic plate containing the organically bonded ceramic grinding block was machined and the organically bonded ceramic grinding block was cut into 10mm squares. And winding one side of the rubber substrate ceramic plate containing natural rubber on an bakelite pipe containing EVA sponge and a cloth-sandwiched rubber reinforcing material to prepare the organic ceramic grinding brush.
Wherein the structural formula of the phosphorus-containing modified epoxy resin is as follows:
wherein n is 7.
Example 3
This example is prepared in essentially the same manner as example 1, except that: the structural formula of the phosphorus-containing modified epoxy resin adopted in the embodiment is as follows:
wherein n is 2.
Example 4
A preparation method of an organic ceramic grinding brush comprises the following steps:
(1) mixing 80 parts of boron nitride, 8 parts of acrylic acid hollow microspheres and 10 parts of 1, 4-butanediol diglycidyl ether, uniformly stirring by using a stirrer, and filtering out agglomerates by using a 50-mesh screen to obtain a mixture A;
(2) adding 10 parts of liquid phenol novolac epoxy resin, 30 parts of phosphorus-containing modified epoxy resin, 20 parts of phenolic aldehyde amine curing agent, 6 parts of phosphorus trimethylol oxide and 0.2 part of fumed silica into a stirrer, uniformly mixing and stirring, then blending with the mixture A, and stirring for 10 minutes by adopting a double-planet stirrer to obtain a mixture B;
(3) filling the mixture B into a mold, carrying out hot pressing in a hot press at the temperature of 120 ℃ for 20 minutes, and cooling and demolding to obtain an organic bonded ceramic grinding block;
(4) coating a layer of bi-component epoxy adhesive on the surface of natural rubber, and hot-pressing the organically-combined ceramic grinding block and the glued natural rubber in a hot press at the hot-pressing temperature of 120 ℃, for 10 minutes and under the pressure of 5 tons to obtain the rubber-based ceramic plate.
(5) The side of the rubber-based ceramic plate containing the organically bonded ceramic grinding block was machined and the organically bonded ceramic grinding block was cut into 10mm squares. And winding one side of the rubber substrate ceramic plate containing natural rubber on an bakelite pipe containing EVA sponge and a cloth-sandwiched rubber reinforcing material to prepare the organic ceramic grinding brush.
Wherein the structural formula of the phosphorus-containing modified epoxy resin is as follows:
wherein n is 0.
Example 5
This example is prepared in substantially the same manner as example 2, except that: the content of the phosphorus-containing modified epoxy resin in this example was 20 parts.
Comparative example 1
The preparation method of the organic ceramic brush of the comparative example is the same as that of example 1 except that the acrylic acid hollow microspheres are not added.
Comparative example 2
The preparation method of the organic ceramic grinding brush in the comparative example comprises the following steps:
(1) adding 60 parts of green silicon carbide, 5 parts of acrylic acid hollow microspheres, 1 part of trimethylolpropane triglycidyl ether, 30 parts of liquid bisphenol F epoxy resin, 15 parts of phosphorus-containing modified epoxy resin, 15 parts of polyamide curing agent, 4 parts of phosphorus oxide and 0.5 part of organic bentonite into a stirrer, mixing and stirring uniformly, and stirring for 5 minutes by adopting a double-planet stirrer to obtain a mixture B; the rest of the procedure was the same as in example 1.
Comparative example 3
The organic ceramic brush of this comparative example was prepared in the same manner as in example 1, except that the resin used in example 1 was a liquid bisphenol F epoxy resin, and the resin used in this comparative example was a solid bisphenol a novolac epoxy resin powder.
Comparative example 4
The organic ceramic brush of this comparative example was prepared in the same manner as in example 1, except that the resin used in example 1 was a liquid bisphenol F epoxy resin, and the resin used in this comparative example was a phenol novolac resin.
Comparative example 5
The preparation method of the organic ceramic brush of this comparative example was the same as example 1 except that the phosphorus-containing modified epoxy resin was not added.
The performance of the organic ceramic brushes obtained in examples 1 to 5 and comparative examples 1 to 5 was measured, and the test items and conditions were as follows, and the results are shown in Table 1.
Hardness: shore D hardness test.
Grinding force: single brush grinder test: respectively and uniformly taking 20 points on the whole board surface by using a copper thickness tester, calculating an average value, and calculating the thickness difference between the ground copper clad laminate and the ground copper clad laminate to obtain the copper-removing grinding force, wherein the copper clad laminate with the thickness of 1.2mm is adopted.
Service life: single brush grinder test: and (3) grinding the board surface for 2000 times, measuring the thickness A before grinding the ceramic block and the consumed thickness B by using a vernier caliper, wherein the service life is 2000/B A, and obtaining the service life, wherein a copper-clad plate with the thickness of 1.2mm is adopted.
Sheet appearance: and (3) using a single-brush grinding machine to walk the plate for 2 times, drying and then observing the number of the ant feet visually, wherein a copper-clad plate with the thickness of 0.15mm is adopted.
And (3) testing the flame retardance: the UL94-V0 standard is adopted.
TABLE 1 organic ceramic scrub Performance test results
As can be seen from the data in Table 1, the organic ceramic brush prepared in examples 1-5 has the advantages of good grindability, excellent copper removal capability, long service life, good polishing effect, no halogen, environmental protection and excellent flame retardant effect. Example 1 the life of the organic ceramic brush made in example 3 is a strong advantage over example 1 in that the phosphorous epoxy resin used in example 1 contains ortho-methyl groups, has greater steric hindrance, and enhances the brittleness of the system, while the phosphorous epoxy resin used in example 3 does not contain ortho-methyl groups, is more flexible, and therefore has a longer life, as compared to example 3. Compared with example 2, the organic ceramic prepared in example 5 has better brushing performance than that of example 2, because the service life can be effectively prolonged along with the increase of organic substances of the phosphorus-containing modified epoxy resin. The acrylic acid hollow microspheres are not added in the comparative example 1, so that the grinding force is reduced more, and the acrylic acid hollow microspheres are directly introduced into foam holes, the foam holes are fine, dense and uniform, and the multiplying power is controllable, so that the service life of the organic ceramic grinding brush is effectively prolonged, and the toughness of the organic ceramic grinding brush is improved. In comparative example 2, all the substances were directly mixed, resulting in that irregular and non-uniform agglomerates could not be removed well, affecting the performance. Comparative example 3 is that solid bisphenol a novolac epoxy resin is used to combine with abrasive, and the viscosity is too high and easy to agglomerate during the manufacturing process, so that the abrasive cannot be uniformly dispersed, the sheet grinding performance is poor, and scratches are easy to generate, comparative example 4 is that linear phenolic resin is used, the same disadvantages exist as comparative example 3, and the service life of the ceramic grinding brush is sharply reduced due to the fact that the phenolic resin is extremely brittle and hard.
Finally, it should be noted that the above embodiments are only for technical solution of the present invention and not for limitation of the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, the present invention is not limited to the above disclosed embodiments, but should cover various modifications, equivalent combinations, made according to the essence of the present invention.
Claims (9)
1. The preparation method of the organic ceramic grinding brush is characterized by comprising the following steps:
firstly, mixing 40-85 parts of grinding material, 1-10 parts of acrylic hollow microspheres and 1-10 parts of epoxy diluent, uniformly stirring, and filtering by adopting a screen to obtain a mixture A;
secondly, mixing and uniformly stirring 10-30 parts of liquid epoxy resin, 5-30 parts of phosphorus-containing modified epoxy resin, 5-20 parts of liquid amine curing agent, 3-8 parts of halogen-free flame retardant and 0.1-1 part of thixotropic agent, and then blending and uniformly stirring the mixture A to obtain a mixture B;
thirdly, the mixture B is subjected to hot pressing after being molded, and the organic combined ceramic grinding block is obtained after demolding;
bonding the organic combined ceramic grinding block with natural rubber by using an adhesive, and performing hot press molding to obtain a rubber substrate ceramic plate;
fifthly, winding one side of the rubber substrate ceramic plate containing the natural rubber on a supporting pipe containing an elastic porous layer to prepare the organic ceramic grinding brush;
the structural formula of the phosphorus-containing modified epoxy resin is as follows:
wherein n is 0 to 10.
2. The method of claim 1, wherein the liquid epoxy resin comprises at least one of liquid bisphenol a epoxy resin, liquid bisphenol F epoxy resin, and liquid phenol novolac epoxy resin.
3. The method of claim 1, wherein the liquid amine curing agent is selected from one or more of phenol-aldehyde amine, polyether amine, aliphatic amine, polyamide, and alicyclic amine.
4. The method as claimed in claim 1, wherein the microspheres of the acrylic hollow microspheres are made of polymethyl methacrylate and have a glass transition temperature of 100-110 ℃.
5. The method of claim 1, wherein the adhesive is a two-component epoxy adhesive, and the two-component epoxy adhesive is an alicyclic amine and a dimer acid-modified epoxy resin, respectively.
6. The method of making an organic ceramic brush according to claim 1, further comprising, prior to step five, the steps of: and processing one side of the rubber substrate ceramic plate containing the organic combined ceramic grinding block, and cutting the organic combined ceramic grinding block into strips.
7. The method of claim 1, wherein the abrasive is selected from one or more of green silicon carbide, black silicon carbide, alumina, silica, and boron nitride.
8. The method of claim 1, wherein the halogen-free flame retardant is phosphorous trimethyoxide.
9. An organic ceramic brush obtained by the method for producing an organic ceramic brush according to any one of claims 1 to 8.
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| CN111604826A (en) * | 2020-06-22 | 2020-09-01 | 广东捷骏电子科技有限公司 | Large-cutting ceramic brush wheel and preparation method thereof |
| CN111687757B (en) * | 2020-06-22 | 2021-08-03 | 广东捷骏电子科技有限公司 | Rubber substrate ceramic resin abrasive disc and preparation method thereof |
| CN111673631A (en) * | 2020-06-22 | 2020-09-18 | 广东捷骏电子科技有限公司 | Soft metal grinding precision grinding wheel and preparation method thereof |
| CN113736132B (en) * | 2021-10-21 | 2023-06-06 | 东莞市鼎泰鑫电子有限公司 | Low-density epoxy foaming grinding wheel and preparation method thereof |
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| CN110423429A (en) * | 2019-08-16 | 2019-11-08 | 安徽省恒昌刷业有限公司 | A kind of high-efficiency abrasion-proof brush roll material and preparation method thereof |
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