CN116003963B - Environment-friendly grinding brush roller and preparation method thereof - Google Patents
Environment-friendly grinding brush roller and preparation method thereof Download PDFInfo
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- CN116003963B CN116003963B CN202211743178.6A CN202211743178A CN116003963B CN 116003963 B CN116003963 B CN 116003963B CN 202211743178 A CN202211743178 A CN 202211743178A CN 116003963 B CN116003963 B CN 116003963B
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- 238000000227 grinding Methods 0.000 title claims abstract description 62
- 238000002360 preparation method Methods 0.000 title claims abstract description 23
- 239000003822 epoxy resin Substances 0.000 claims abstract description 94
- 229920000647 polyepoxide Polymers 0.000 claims abstract description 94
- 239000007787 solid Substances 0.000 claims abstract description 65
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 61
- 239000012948 isocyanate Substances 0.000 claims abstract description 33
- 238000001723 curing Methods 0.000 claims abstract description 25
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 22
- 150000002513 isocyanates Chemical class 0.000 claims abstract description 20
- 239000007822 coupling agent Substances 0.000 claims abstract description 18
- 230000001804 emulsifying effect Effects 0.000 claims abstract description 13
- 238000011049 filling Methods 0.000 claims abstract description 13
- 238000003756 stirring Methods 0.000 claims abstract description 13
- QGBSISYHAICWAH-UHFFFAOYSA-N dicyandiamide Chemical compound NC(N)=NC#N QGBSISYHAICWAH-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000000843 powder Substances 0.000 claims abstract description 10
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 18
- -1 alicyclic amine Chemical class 0.000 claims description 17
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 14
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 12
- 239000004952 Polyamide Substances 0.000 claims description 10
- 229920002647 polyamide Polymers 0.000 claims description 10
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 239000000377 silicon dioxide Substances 0.000 claims description 4
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 3
- 229910052582 BN Inorganic materials 0.000 claims description 2
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims description 2
- 150000004982 aromatic amines Chemical class 0.000 claims description 2
- 239000004841 bisphenol A epoxy resin Substances 0.000 claims description 2
- 229910021418 black silicon Inorganic materials 0.000 claims description 2
- ZBCBWPMODOFKDW-UHFFFAOYSA-N diethanolamine Chemical compound OCCNCCO ZBCBWPMODOFKDW-UHFFFAOYSA-N 0.000 claims description 2
- 239000004843 novolac epoxy resin Substances 0.000 claims description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 8
- 229910052802 copper Inorganic materials 0.000 abstract description 8
- 239000010949 copper Substances 0.000 abstract description 8
- 230000003746 surface roughness Effects 0.000 abstract description 6
- 239000003082 abrasive agent Substances 0.000 abstract description 5
- 238000010438 heat treatment Methods 0.000 description 18
- 229920005989 resin Polymers 0.000 description 14
- 239000011347 resin Substances 0.000 description 14
- 230000000052 comparative effect Effects 0.000 description 13
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical compound C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 12
- 238000007664 blowing Methods 0.000 description 10
- 238000007493 shaping process Methods 0.000 description 10
- 238000012360 testing method Methods 0.000 description 9
- 229920001213 Polysorbate 20 Polymers 0.000 description 8
- 239000000256 polyoxyethylene sorbitan monolaurate Substances 0.000 description 8
- 235000010486 polyoxyethylene sorbitan monolaurate Nutrition 0.000 description 8
- 238000004898 kneading Methods 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- 239000008601 oleoresin Substances 0.000 description 5
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 3
- IQPQWNKOIGAROB-UHFFFAOYSA-N isocyanate group Chemical group [N-]=C=O IQPQWNKOIGAROB-UHFFFAOYSA-N 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 238000007711 solidification Methods 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 150000001412 amines Chemical class 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 2
- 238000007873 sieving Methods 0.000 description 2
- 235000012239 silicon dioxide Nutrition 0.000 description 2
- 239000004375 Dextrin Substances 0.000 description 1
- 229920001353 Dextrin Polymers 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 206010024769 Local reaction Diseases 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 125000000129 anionic group Chemical group 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- QXJJQWWVWRCVQT-UHFFFAOYSA-K calcium;sodium;phosphate Chemical compound [Na+].[Ca+2].[O-]P([O-])([O-])=O QXJJQWWVWRCVQT-UHFFFAOYSA-K 0.000 description 1
- 125000002091 cationic group Chemical group 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 235000019425 dextrin Nutrition 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 238000013007 heat curing Methods 0.000 description 1
- 239000004850 liquid epoxy resins (LERs) Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
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- 239000000049 pigment Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 235000010482 polyoxyethylene sorbitan monooleate Nutrition 0.000 description 1
- 229920000053 polysorbate 80 Polymers 0.000 description 1
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- 239000004094 surface-active agent Substances 0.000 description 1
Landscapes
- Epoxy Resins (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses an environment-friendly grinding brush roller and a preparation method thereof, wherein the preparation method comprises the following steps: emulsifying aqueous epoxy resin, aqueous closed isocyanate, modified solid epoxy resin, water, abrasive and auxiliary agent, then adding aqueous curing agent, stirring uniformly, filling into a mould, and baking to obtain the environment-friendly grinding brush roller, wherein the modified solid epoxy resin is prepared by the following steps: according to parts by weight, 25-35 parts of solid epoxy resin, 0.5-3 parts of dicyandiamide and 1-3 parts of coupling agent are kneaded for 1-3 hours at the temperature of 80-90 ℃, cooled to room temperature, crushed into powder, and then screened by a screen to prepare the modified solid epoxy resin. The environment-friendly grinding brush roller disclosed by the invention is simple in preparation process, free of VOC gas emission, environment-friendly and environment-friendly, and excellent in strength performance, and the environment-friendly grinding brush roller has excellent performance in the aspects of hardness, surface roughness, copper removal amount, sheet appearance and the like.
Description
Technical Field
The invention relates to the technical field of grinding brush rollers, in particular to an environment-friendly grinding brush roller and a preparation method thereof.
Background
The PCB circuit board generally needs to adopt a grinding brush roller to carry out surface grinding treatment so as to meet the technical requirements of different procedures. At present, the grinding brush roller production in the PCB industry is basically formed by combining resin of an oily system, abrasive materials, pore formers and some auxiliary agents. The use of oleoresin as a bonding carrier has two disadvantages: firstly, the contact angle of the oleoresin to the abrasive is large, the abrasive is difficult to wet, the abrasive is difficult to be coated by the resin and is easy to agglomerate, and scratches are formed on the surface of the plate after molding; secondly, the oleoresin is more or less required to be added with solvent, and a certain temperature is required to post-cure the resin in the molding process, so that the solvent is released, a certain amount of VOC gas is discharged, the environment is harmed, and the environmental protection problem is caused. The aqueous resin is very environmentally friendly, and the resin bonding strength of the aqueous resin with respect to the oleoresin is much inferior, so how to improve the strength of the aqueous resin is very critical.
Disclosure of Invention
The invention aims to provide a preparation method of an environment-friendly grinding brush roller, which is environment-friendly, and the prepared environment-friendly grinding brush roller has excellent strength performance.
The second purpose of the invention is to provide an environment-friendly grinding brush roller, which is manufactured by adopting the manufacturing method of the environment-friendly grinding brush roller.
In order to achieve the above purpose, the invention discloses a preparation method of an environment-friendly grinding brush roller, which comprises the following steps:
(1) Emulsifying aqueous epoxy resin, aqueous closed isocyanate, modified solid epoxy resin, water, abrasive and auxiliary agent, adding aqueous curing agent, stirring uniformly, filling into a mould, baking to obtain the environment-friendly grinding brush roller,
Wherein the modified solid epoxy resin is prepared by the following method:
Adding 25-35 parts by weight of solid epoxy resin, 0.5-3 parts by weight of dicyandiamide and 1-3 parts by weight of coupling agent into a kneader, kneading for 1-3 hours at 80-90 ℃, cooling to room temperature, grinding into powder by a wall breaking machine, and sieving to obtain the modified solid epoxy resin.
Compared with the prior art, the preparation method of the environment-friendly grinding brush roller solves the problem of VOC gas emission by using water as a solvent, the water can be used as a dispersion carrier to be beneficial to dispersion of the grinding materials, fine honeycomb-shaped pores can be formed in the system by volatilizing the water after heating, the grinding materials and the resin are uniformly attached around the pores, and the grinding materials are good in falling synchronism and good in plate surface effect consistency during grinding. More importantly, the strength is enhanced by using the water-based blocked isocyanate and the modified solid epoxy resin, the water-based blocked isocyanate releases isocyanate groups during heat treatment, and reacts with hydroxyl, carboxyl, amino and other groups on the molecular chain of the water-based epoxy resin to form a crosslinked structure, the water-based epoxy resin is originally coated with water in a single particle form in the system, the resin and the resin are difficult to combine, but after the water is removed during baking, the water-based blocked isocyanate is unblocked and crosslinked with the water-based epoxy resin to enhance the curing strength. The modified solid epoxy resin is characterized in that the coupling agent lipophilic group is grafted onto the epoxy resin molecular chain preferentially, the coupling agent plays a bridging role after mixing, the abrasive and the modified solid epoxy resin can be connected together, and after heat treatment and solidification, the strength of the system can be secondarily enhanced by the modified solid epoxy resin. Therefore, the preparation process of the environment-friendly grinding brush roller is simple, no VOC gas is discharged, the environment is protected, and the strength of the prepared environment-friendly grinding brush roller is excellent.
It can be understood that after the solid epoxy resin is modified by dicyandiamide and a coupling agent, the coupling agent lipophilic group can be grafted on the solid epoxy resin molecular chain, the coupling agent plays a bridging role after mixing, the abrasive and the modified solid epoxy resin can be connected together, and after heat treatment and solidification, the strength of the system can be secondarily enhanced by the modified solid epoxy resin.
Illustratively, the solid epoxy resin content may be, but is not limited to, 25 parts, 26 parts, 27 parts, 28 parts, 29 parts, 30 parts, 31 parts, 32 parts, 33 parts, 34 parts, 35 parts; the dicyandiamide content may be, but is not limited to, 0.5 parts, 1 part, 1.5 parts, 2 parts, 2.5 parts, 3 parts; the content of the coupling agent may be, but is not limited to, 1 part, 1.5 parts, 2 parts, 2.5 parts, 3 parts.
In some embodiments, the crushed powder is passed through a 200-500 mesh screen, such as, but not limited to, a 200 mesh screen, a 300 mesh screen, a 400 mesh screen, a 500 mesh screen.
In some embodiments, 16-22 parts by weight of the aqueous epoxy resin, 2-4 parts of the aqueous blocked isocyanate, 4-8 parts of the modified solid epoxy resin, 20-60 parts of water, 35-60 parts of the abrasive and 1-3 parts of the auxiliary agent are emulsified, and then 14-20 parts of the aqueous curing agent is added.
Illustratively, the content of the aqueous epoxy resin may be, but is not limited to, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts, 21 parts, 22 parts; the content of the aqueous blocked isocyanate may be, but is not limited to, 2 parts, 3 parts, 4 parts; the content of the modified solid epoxy resin may be, but is not limited to, 4 parts, 5 parts, 6 parts, 7 parts, 8 parts; the water content may be, but is not limited to, 20 parts, 30 parts, 40 parts, 50 parts, 60 parts; the abrasive content may be, but is not limited to, 35 parts, 40 parts, 45 parts, 50 parts, 55 parts, 60 parts; the content of the auxiliary agent can be, but is not limited to, 1 part, 2 parts, 3 parts; the content of the aqueous curing agent may be, but is not limited to, 14 parts, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts.
In some embodiments, the baking process comprises a first bake, followed by a second bake, the first bake being at a temperature of 80-100deg.C for a baking time of 4-8 hours; the temperature of the secondary baking is 140-160 ℃, the baking time is 2-3h, and the primary baking is used for drying water, so that the foaming agent is foamed and the glue is cured in the secondary baking. In the heat treatment, the water-based blocked isocyanate releases isocyanate groups, and reacts with hydroxyl, carboxyl, amino and other groups on the molecular chain of the water-based epoxy resin to form a crosslinked structure, the water-based epoxy resin is originally coated with water in a single particle form in the system, the resin and the resin are difficult to combine, but after the water is removed in the baking process, the water-based blocked isocyanate is unblocked and crosslinked with the water-based epoxy resin to enhance the curing strength, and after the heat treatment and curing, the modified solid epoxy resin can secondarily enhance the strength of the system.
In some embodiments, the viscosity of the aqueous epoxy resin is below 5000cps at 25 ℃, as examples, the viscosity of the aqueous epoxy resin may be, but is not limited to, 5000cps, 4800cps, 4600cps, 4500cps, 4000cps, and the like. The aqueous epoxy resin may be at least one of an anionic aqueous epoxy resin, a nonionic aqueous epoxy resin, or a cationic aqueous epoxy resin. Further, the solid content of the aqueous epoxy resin is 50-60%.
In some embodiments, the viscosity of the aqueous blocked isocyanate is below 3000cps at 25 ℃. By way of example, the viscosity of the aqueous blocked isocyanate may be, but is not limited to, 3000cps, 2800cps, 2600cps, 2500cps, 2000cps, and the like. Further, the aqueous blocked isocyanate is at least one of aromatic isocyanate, aliphatic isocyanate and alicyclic isocyanate. Further, the deblocking temperature of the aqueous blocked isocyanate is 110-130 ℃. In a preferred embodiment, the solids content of the aqueous blocked isocyanate is 50-80%, but not limited thereto.
In some embodiments, the solid epoxy resin is selected from at least one of bisphenol a epoxy resin, phenol novolac epoxy resin. Further, the particle diameter D50 of the solid epoxy resin is 1-30um, but not limited thereto. Further, the softening point of the solid epoxy resin is 60-80 ℃, but the softening point is not limited to the above.
In some embodiments, the dicyandiamide powder has a particle size D50 of 1-15um, but not limited thereto.
In some embodiments, the coupling agent is any one or more of organochromium complexes, silanes, titanates, and aluminate compounds.
In some embodiments, the abrasive comprises any one or more of green silicon carbide, black silicon carbide, aluminum oxide, silicon dioxide, boron nitride, hollow silicon dioxide, hollow aluminum oxide. Further, the particle diameter D50 of the abrasive is 1-120um, but not limited thereto.
In some embodiments, the auxiliary agent is one or more of an epoxy diluent, dextrin, surfactant, pigment, or a combination thereof.
In some embodiments, the viscosity of the aqueous curing agent is below 5000cps at 25 ℃, as examples, the viscosity of the aqueous curing agent may be, but is not limited to, 5000cps, 4800cps, 4600cps, 4500cps, 4000cps, and the like. In some embodiments, the aqueous curing agent is at least one of an aromatic amine, an aliphatic amine, a cycloaliphatic amine, and a polyamide. In some preferred embodiments, the solids content of the aqueous curing agent is 60-80%, but not limited thereto.
Correspondingly, the invention also provides an environment-friendly grinding brush roller which has better performances in the aspects of hardness, surface roughness, copper removal amount, sheet appearance and the like.
Detailed Description
The technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
The preparation method of the environment-friendly grinding brush roller comprises the following steps:
According to the weight portions, 18 portions of water-based self-emulsifying epoxy resin CYDW (Baling petrochemical), 3 portions of water-based closed aromatic isocyanate, 6 portions of modified solid epoxy resin, 30 portions of water, 40 portions of silicon carbide and 1 portion of Tween 20 are emulsified for 3 hours in an emulsifying machine,
Then adding 16 parts of aqueous polyamide curing agent, stirring for 20min in a stirrer, filling into a mould, shaping for 6h at normal temperature, putting into an electrothermal blowing oven for baking for 6h at 90 ℃, continuously heating to 150 ℃ for baking for 2h, obtaining the environment-friendly grinding brush roller,
Wherein the modified solid epoxy resin is prepared by the following method:
According to parts by weight, 30 parts of bisphenol A solid epoxy resin E20, 1 part of dicyandiamide and 1 part of coupling agent KH-560 are added into a kneader, heated to 80 ℃ for kneading for 2 hours, cooled to room temperature, crushed into powder by a wall breaking machine, and then screened by a 300-mesh screen, so as to prepare the modified solid epoxy resin.
Example 2
The preparation method of the environment-friendly grinding brush roller comprises the following steps:
According to the weight portions, 20 portions of water-based self-emulsifying epoxy resin CYDW (Baling petrochemical), 4 portions of water-based closed aromatic isocyanate, 7 portions of modified solid epoxy resin, 25 portions of water, 35 portions of silicon carbide and 1 portion of Tween 80 are emulsified for 3 hours in an emulsifying machine,
Then adding 15 parts of aqueous fatty amine curing agent, stirring for 20min in a stirrer, filling into a mould, shaping for 7h at normal temperature, putting into an electrothermal blowing oven for baking for 6h at 90 ℃, continuously heating to 150 ℃ for baking for 2h to prepare the environment-friendly grinding brush roller,
Wherein the modified solid epoxy resin is prepared by the following method:
according to parts by weight, adding 35 parts of phenol novolac solid epoxy resin, 1 part of dicyandiamide and 1 part of coupling agent KH-560 into a kneader, heating to 90 ℃ and kneading for 3 hours, cooling to room temperature, grinding into powder by adopting a wall breaking machine, and then sieving with a 300-mesh screen to obtain the modified solid epoxy resin.
Example 3
The preparation method of the environment-friendly grinding brush roller comprises the following steps:
16 parts of water-based self-emulsifying epoxy resin CYDW (Baling petrochemical), 3 parts of water-based closed aromatic isocyanate, 6 parts of modified solid epoxy resin, 35 parts of water, 45 parts of silicon carbide and 1.5 parts of Tween 20 are emulsified in an emulsifying machine for 3 hours according to parts by weight,
Then adding 18 parts of aqueous alicyclic amine curing agent, stirring for 20min in a stirrer, filling into a mould, shaping for 6h at normal temperature, putting into an electrothermal blowing oven for baking for 8h at 80 ℃, continuously heating to 150 ℃ for baking for 2h to prepare the environment-friendly grinding brush roller,
Wherein the modified solid epoxy resin is prepared by the following method:
According to the weight portion, 25 portions of bisphenol A solid epoxy resin E20, 1 portion of dicyandiamide and 1.2 portions of coupling agent KH-560 are added into a kneader, heated to 80 ℃ for kneading for 2 hours, cooled to room temperature, crushed into powder by a wall breaking machine, and then screened by a 300-mesh screen, thus obtaining the modified solid epoxy resin.
Example 4
The preparation method of the environment-friendly grinding brush roller comprises the following steps:
16 parts of water-based self-emulsifying epoxy resin CYDW (Baling petrochemical industry), 3 parts of water-based closed aromatic isocyanate, 6 parts of modified solid epoxy resin, 20 parts of water, 60 parts of silicon carbide and 1 part of Tween 20 are emulsified in an emulsifying machine for 3 hours according to the parts by weight,
Then adding 14 parts of aqueous polyamide curing agent, stirring for 20min in a stirrer, filling into a mould, shaping for 6h at normal temperature, putting into an electrothermal blowing oven for baking for 4h at 90 ℃, continuously heating to 150 ℃ for baking for 2h, obtaining the environment-friendly grinding brush roller,
Wherein the modified solid epoxy resin is prepared by the following method:
According to parts by weight, 30 parts of bisphenol A solid epoxy resin E20, 1 part of dicyandiamide and 2 parts of coupling agent KH-560 are added into a kneader, heated to 80 ℃ for kneading for 2 hours, cooled to room temperature, crushed into powder by a wall breaking machine, and then screened by a 300-mesh screen, so as to prepare the modified solid epoxy resin.
Example 5
The preparation method of the environment-friendly grinding brush roller comprises the following steps:
According to the weight portions, 20 portions of water-based self-emulsifying epoxy resin CYDW (Baling petrochemical), 3 portions of water-based closed aromatic isocyanate, 6 portions of modified solid epoxy resin, 60 portions of water, 40 portions of silicon carbide and 1 portion of Tween 20 are emulsified for 3 hours in an emulsifying machine,
Then adding 18 parts of aqueous polyamide curing agent, stirring for 20min in a stirrer, filling into a mould, shaping for 8h at normal temperature, putting into an electrothermal blowing oven for baking for 8h at 100 ℃, continuously heating to 150 ℃ for baking for 2h to prepare the environment-friendly grinding brush roller,
Wherein the modified solid epoxy resin is prepared by the following method:
According to parts by weight, 30 parts of bisphenol A solid epoxy resin E20, 1 part of dicyandiamide and 2 parts of coupling agent KH-560 are added into a kneader, heated to 80 ℃ for kneading for 2 hours, cooled to room temperature, crushed into powder by a wall breaking machine, and then screened by a 300-mesh screen, so as to prepare the modified solid epoxy resin.
Comparative example 1
The preparation method of the environment-friendly grinding brush roller comprises the following steps:
according to the weight portions, 18 portions of water self-emulsifying epoxy resin CYDW (Baling petrochemical), 6 portions of modified solid epoxy resin, 30 portions of water, 40 portions of silicon carbide and 1 portion of Tween 20 are emulsified for 3 hours in an emulsifying machine,
Then adding 16 parts of aqueous polyamide curing agent, stirring for 20min in a stirrer, filling into a mould, shaping for 6h at normal temperature, putting into an electrothermal blowing oven for baking for 6h at 90 ℃, continuously heating to 150 ℃ for baking for 2h, obtaining the environment-friendly grinding brush roller,
The preparation method of the modified solid epoxy resin is the same as that of example 1, and is not described here.
Comparative example 2
The preparation method of the environment-friendly grinding brush roller comprises the following steps:
according to the weight portions, 18 portions of water self-emulsifying epoxy resin CYDW (Baling petrochemical), 3 portions of water-based closed aromatic isocyanate, 30 portions of water, 40 portions of silicon carbide and 1 portion of Tween 20 are emulsified for 3 hours in an emulsifying machine,
Then adding 16 parts of aqueous polyamide curing agent, stirring for 20min in a stirrer, filling into a mould, shaping for 6h at normal temperature, putting into an electrothermal blowing oven for baking for 6h at 90 ℃, and continuously heating to 150 ℃ for baking for 2h to obtain the environment-friendly grinding brush roller.
Comparative example 3
The preparation method of the environment-friendly grinding brush roller comprises the following steps:
According to the weight portions, 18 portions of water-based self-emulsifying epoxy resin CYDW (Baling petrochemical), 30 portions of water, 40 portions of silicon carbide and 1 portion of Tween 20 are emulsified for 3 hours in an emulsifying machine,
Then adding 16 parts of aqueous polyamide curing agent, stirring for 20min in a stirrer, filling into a mould, shaping for 6h at normal temperature, putting into an electrothermal blowing oven for baking for 6h at 90 ℃, and continuously heating to 150 ℃ for baking for 2h to obtain the environment-friendly grinding brush roller.
Comparative example 4
A preparation method of a grinding brush roller comprises the following steps:
1) 25 parts of bisphenol A liquid epoxy resin E51, 10 parts of absolute ethyl alcohol, 5 parts of hollow glass spheres, 40 parts of silicon carbide and 0.5 part of coupling agent are put into an emulsifying machine to be emulsified for 3 hours;
2) Continuously adding 15 parts of polyamide curing agent, stirring for 20min in a stirrer, filling into a mould, shaping for 6h at normal temperature, and putting into an electrothermal blowing oven for baking for 2h at 120 ℃ to obtain the grinding brush roller.
Comparative example 5
The preparation method of the environment-friendly grinding brush roller comprises the following steps:
According to the weight portions, 18 portions of water-based self-emulsifying epoxy resin CYDW (Baling petrochemical), 3 portions of water-based closed aromatic isocyanate, 30 portions of bisphenol A solid epoxy resin E20, 30 portions of water, 40 portions of silicon carbide and 1 portion of Tween 20 are emulsified for 3 hours in an emulsifying machine,
Then adding 16 parts of aqueous polyamide curing agent, stirring for 20min in a stirrer, filling into a mould, shaping for 6h at normal temperature, putting into an electrothermal blowing oven for baking for 6h at 90 ℃, continuously heating to 150 ℃ for baking for 2h, obtaining the environment-friendly grinding brush roller,
The grinding brush rolls prepared in examples 1 to 5 and comparative examples 1 to 5 were subjected to performance test, and the test results are shown in Table 1.
Wherein, test items and test instruments are as follows:
Hardness: the Shore hardness D needle test is adopted;
density: testing by adopting a solid density measuring instrument;
roughness: testing by adopting a roughness tester;
Copper removal and sheet appearance: a single brush mill test was used in which a 2mm thick copper clad laminate was used.
TABLE 1 Performance test results
As is clear from the data in Table 1, the polishing brush rolls in examples 1 to 5 had excellent performance in terms of hardness, surface roughness, copper removal amount, plate surface performance and the like. The invention mainly uses the water-based blocked isocyanate and the modified solid epoxy resin to strengthen the strength, when in heat treatment, the water-based blocked isocyanate releases isocyanate groups, and reacts with hydroxyl groups, carboxyl groups, amino groups and other groups on the molecular chain of the water-based epoxy resin to form a crosslinked structure, the water-based epoxy resin is originally coated with water in a single particle in the system, the resin and the resin are difficult to combine, but after the water is removed in the baking process, the water-based blocked isocyanate is unblocked and crosslinked with the water-based epoxy resin to strengthen the curing strength. The modified solid epoxy resin is characterized in that the coupling agent lipophilic group is grafted onto the epoxy resin molecular chain preferentially, the coupling agent plays a bridging role after mixing, the abrasive and the modified solid epoxy resin can be connected together, and after heat treatment and solidification, the strength of the system can be secondarily enhanced by the modified solid epoxy resin.
The density of the grinding brush roller is adjusted in the embodiment 4-5, the embodiment 4 is a high-density product, the embodiment 5 is a low-density product, the product of the technical scheme can be made into high-density products or low-density products, the compatibility is stronger, the performance parameters of the brush roller can be adjusted at will, the copper removal amount is improved compared with the embodiment 1-3, but the surface roughness of the plate surface is also improved, and the product can be adjusted according to the requirement in actual production.
In comparison with example 1, comparative example 1 was free of aqueous blocked aromatic isocyanate, comparative example 2 was free of modified solid epoxy resin, comparative example 3 was free of aqueous blocked aromatic isocyanate and modified solid epoxy resin, and test results showed that the hardness of the products of comparative examples 1 to 3 was significantly reduced and the copper removal amount was poor, mainly due to lack of aqueous blocked aromatic isocyanate or modified solid epoxy resin, resulting in poor strength of the system, too low hardness, insufficient sharpness of the surface during grinding, resulting in reduced cutting force, especially the component of comparative example 3 which did not increase strength, too poor strength, and too low hardness, resulting in substantially no grinding force.
Comparative example 4 is an oleoresin formulation used for preparing a grinding brush roller normally and commonly, and test data shows that the product can be expressed in terms of hardness, surface roughness and copper removal amount, but the apparent effect of a thin plate is poor, the surface of the thin plate is scratched, because the glue of an oily system is poor in dispersion of abrasive materials and easy to agglomerate, and the agglomerated abrasive materials can cause scratches on the surface of the thin plate during grinding.
As is clear from the data, the non-modified solid epoxy resin is adopted in comparative example 5, and the hardness of the grinding brush roller is uneven, so that the roughness of each place of the plate surface is uneven, and the surface roughness of the thin plate is also uneven, two main reasons are that the non-modified solid epoxy resin is easy to agglomerate, the local reaction degree is different, the hardness is uneven, and the reaction degree of the non-modified solid epoxy resin and the aqueous curing agent is not high.
The foregoing description of the preferred embodiments of the present invention is not intended to limit the scope of the claims, which follow, as defined in the claims.
Claims (8)
1. The preparation method of the environment-friendly grinding brush roller is characterized by comprising the following steps:
According to parts by weight, emulsifying 16-22 parts of water-based epoxy resin, 2-4 parts of water-based closed isocyanate, 4-8 parts of modified solid epoxy resin, 20-60 parts of water, 35-60 parts of abrasive and 1-3 parts of auxiliary agent, adding 14-20 parts of water-based curing agent, uniformly stirring, filling into a mould, and baking to obtain an environment-friendly grinding brush roller, wherein the deblocking temperature of the water-based closed isocyanate is 110-130 ℃;
The baking process comprises the steps of first baking, and then performing second baking, wherein the temperature of the first baking is 80-100 ℃ and the baking time is 4-8 hours; the temperature of the second baking is 140-160 ℃, the baking time is 2-3h,
Wherein the modified solid epoxy resin is prepared by the following method:
According to parts by weight, 25-35 parts of solid epoxy resin, 0.5-3 parts of dicyandiamide and 1-3 parts of coupling agent are kneaded for 1-3 hours at the temperature of 80-90 ℃, cooled to room temperature, crushed into powder, and then screened by a screen to prepare the modified solid epoxy resin.
2. The method of preparing an environmentally friendly abrasive brush roll according to claim 1, wherein the aqueous epoxy resin has a viscosity of less than 5000cps at 25 ℃.
3. The method of making an environmentally friendly grinding brush roll of claim 1 wherein the viscosity of the aqueous blocked isocyanate is below 3000cps at 25 ℃.
4. The method for manufacturing an environment-friendly grinding brush roll according to claim 1, wherein the solid epoxy resin is at least one selected from bisphenol a epoxy resin and phenol novolac epoxy resin.
5. The method for preparing an environment-friendly grinding brush roll according to claim 1, wherein the abrasive comprises any one or more of green silicon carbide, black silicon carbide, alumina, silica, boron nitride, hollow silica and hollow alumina.
6. The method of preparing an environmentally friendly abrasive brush roll according to claim 1, wherein the aqueous curing agent has a viscosity of less than 5000cps at 25 ℃.
7. The method for preparing an environment-friendly grinding brush roll according to claim 1, wherein the aqueous curing agent is at least one of aromatic amine, aliphatic amine, alicyclic amine and polyamide.
8. An environment-friendly grinding brush roller, which is characterized in that the environment-friendly grinding brush roller is prepared by the preparation method of any one of claims 1-7.
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| CN202211743178.6A CN116003963B (en) | 2022-12-30 | 2022-12-30 | Environment-friendly grinding brush roller and preparation method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU1314649C (en) * | 1985-03-15 | 1994-10-30 | АООТ-Завод "Мстатор" | Composition for abrasive tool making |
| CN1121330A (en) * | 1993-04-19 | 1996-04-24 | 美国3M公司 | Abrasive articles comprising a grinding aid dispersed in a polymeric blend binder |
| US5556437A (en) * | 1990-11-14 | 1996-09-17 | Minnesota Mining And Manufacturing Company | Coated abrasive having an overcoating of an epoxy resin coatable from water |
| CN112243454A (en) * | 2018-06-14 | 2021-01-19 | 3M创新有限公司 | Method of treating a surface, surface modified abrasive particles and resin bonded abrasive articles |
-
2022
- 2022-12-30 CN CN202211743178.6A patent/CN116003963B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU1314649C (en) * | 1985-03-15 | 1994-10-30 | АООТ-Завод "Мстатор" | Composition for abrasive tool making |
| US5556437A (en) * | 1990-11-14 | 1996-09-17 | Minnesota Mining And Manufacturing Company | Coated abrasive having an overcoating of an epoxy resin coatable from water |
| CN1121330A (en) * | 1993-04-19 | 1996-04-24 | 美国3M公司 | Abrasive articles comprising a grinding aid dispersed in a polymeric blend binder |
| CN112243454A (en) * | 2018-06-14 | 2021-01-19 | 3M创新有限公司 | Method of treating a surface, surface modified abrasive particles and resin bonded abrasive articles |
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| CN116003963A (en) | 2023-04-25 |
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