CN113199414A - Ceramic polishing grinding tool and preparation method thereof - Google Patents
Ceramic polishing grinding tool and preparation method thereof Download PDFInfo
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- CN113199414A CN113199414A CN202110465447.6A CN202110465447A CN113199414A CN 113199414 A CN113199414 A CN 113199414A CN 202110465447 A CN202110465447 A CN 202110465447A CN 113199414 A CN113199414 A CN 113199414A
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- resin
- grinding tool
- grinding
- elastic
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Classifications
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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
- B24D18/00—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for
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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
Abstract
The invention provides a ceramic polishing grinding tool and a preparation method thereof, wherein the grinding tool comprises 25-50% of elastic resin, 30-70% of grinding material, 0-25% of filling material, 0-10% of wax and 0-5% of functional auxiliary agent by weight percentage; the elasticity of the grinding tool is more than 120 percent, the hardness is 75A-95A, the adhesion strength is more than 6MPa, the resistance temperature is more than 150 ℃, wherein the elastic resin can be organic silicon rubber or polyurethane resin, and the polyurethane resin can be an elastic polyurethane rubber finished product or polyester polyol or polyether polyol which respectively reacts with polyisocyanate to generate elastic micro-foaming polyurethane resin; the elastic resin is used as a bonding agent material, and after the elastic resin and the abrasive are combined to form the composite material, the composite material has good elastic toughness, strength and durability, has strong grinding force on ceramics, and effectively solves the problems of grinding patterns, scratches and the like during ceramic polishing.
Description
Technical Field
The invention relates to the field of grinding tools, in particular to a ceramic polishing grinding tool and a preparation method thereof.
Background
The ceramic tile is an important component of building materials, and along with the improvement of production level and life quality of people, the quality requirement of the ceramic tile is also improved. After the ceramic is sintered and formed, sand points, concave-convex points and even grooves with different degrees exist on the surface of the ceramic tile, and the appearance quality of the ceramic tile is influenced. The ceramic tiles need to be ground and polished in order to improve the appearance quality of the tiles. After the ceramic tile is polished by a grinding tool, the surface of the ceramic tile becomes smoother, more attractive, more antifouling and easier to clean. The polished ceramic tiles can be divided into high-gloss tiles, antique tiles, matt tiles and soft-gloss tiles according to different polishing effects, and the high-gloss tiles are generally called matt tiles or soft-gloss tiles with the glossiness of above 80 degrees and below 80 degrees. As the highlight bricks and the archaized bricks on the market are relatively common, and the highlight bricks have the problems of easy reflection, easy abrasion and the like, the highlight bricks and the archaized bricks cannot meet the change of the aesthetic point of the market along with the improvement of the diversified requirements of the market on ceramics, the matt bricks or the soft bricks with soft luster and fine and smooth surfaces enrich the variety range of the ceramics, and the matt bricks and the soft bricks become a trend.
The existing ceramic polishing abrasive tools comprise melamine resin abrasive blocks, magnesia abrasive tools, grinding brushes, sponge abrasive blocks, fiber abrasive blocks and the like, and different application ranges of the abrasive tools are selected according to different characteristics of final products. The grinding tools such as melamine resin grinding blocks, lingering bitter earth and the like are hard in material and stronger in grinding force ratio, and are generally used in the coarse grinding stage. After coarse grinding, the wool wheel, the wool-like wheel and the sponge wheel are used for polishing wax water filling and flat grinding, and a relatively flat polishing effect can be achieved. After wax water is used for grinding and polishing, the glossiness of the brick surface basically reaches more than 80 degrees, and the grinding block grinding tool is mainly applied to high-gloss bricks. Grinding brushes, hairbrushes and sponge grinding blocks are distributed in a strip or porous mode, the grinding effect is poor, the cleaning effects of brushing, sweeping, wiping and the like are mainly achieved, the grinded bricks keep concave-convex feeling, and the grinding tools are applied to antique bricks. In recent years, with the market demand for matt and soft tiles, the application of the abrasive tools is more diversified, and melamine resin abrasive blocks, linger soil abrasive tools, grinding brushes, sponge abrasive blocks and the like are also applied to the polishing process of the matt or soft tiles.
Matte bricks or soft bricks are different from highlight bricks and antique bricks. The flat surfaces of the matt or soft brick and the polished brick are smooth, but the glossiness of the high-gloss brick is higher after polishing due to wax water. The gloss of the matt or soft brick is lower, and is generally required to be 15-75 degrees. After the grinding tool such as a melamine resin grinding block and a lingering clay grinding tool is used for polishing, because the grinding tool is made of too hard materials, polishing contact points are too sharp, the grinding head printing is obvious after polishing, and after polishing, a soft hair wheel is needed to be used for waxing and filling the flat grinding printing to achieve a more attractive effect, however, if the wax filling is too little, the grinding head printing cannot cover the appearance, and if the wax filling is too much, the glossiness is too high and the matte effect cannot be achieved. If the hardness of the grinding tools such as melamine resin grinding blocks and magnesia grinding tools is adjusted to be low, the problem that the grinding tools are easy to fall off and are not wear-resistant due to insufficient toughness of a bonding material when the problem that the grinding head is obviously printed is solved. The grinding tools such as a grinding brush, a hairbrush and a sponge grinding block have porous structures, too large jump of grinding materials, poor grinding effect and obvious concave-convex feeling; if the structure of the grinding tool is looser, the grinding tool has the conditions of weak grinding force, larger abrasive jumping and uneven polished brick surface; if the structures of the grinding brush and the hairbrush are made to be very dense, the strength is too high, the problems of scratches, scratching and the like are easy to occur, and the sponge grinding block is made to be harder, abrasive particles are easy to agglomerate, and grinding patterns or grinding head marks are easy to generate.
In recent years, the market always has the demand of polishing the matt or soft tiles, and various grinding tools are used in the polishing process of the matt or soft tiles, but the polishing effect is not ideal enough, the quality is poor, the qualification rate is low, and the market popularization of the matt or soft tiles is adversely affected.
Disclosure of Invention
A first object of the present invention is to provide a ceramic polishing abrasive tool suitable for polishing matt or soft tiles.
The second purpose of the invention is to provide a preparation method of the ceramic polishing abrasive tool.
In order to achieve the main purpose, the ceramic polishing grinding tool provided by the invention comprises 25-50% of elastic resin, 30-70% of grinding material, 0-25% of filler, 0-10% of wax and 0-5% of functional auxiliary agent by weight percentage; the elasticity of the grinding tool is more than 120 percent, the hardness is 75A-95A, the adhesion strength is more than 6MPa, and the resistance temperature is more than 150 ℃.
According to the scheme, the binding material adopted in the grinding tool is elastic resin, and the elastic resin has good elasticity, so that the grinding tool also feels good elasticity, has good buffer effect when polishing and grinding ceramic, avoids the phenomena of scratches, scratching and the like on the ceramic tile, and simultaneously avoids the scratches generated when polishing by using a grinding brush with grinding materials distributed in a strip shape, the resin in the grinding tool has good toughness and sufficient compactness, and the phenomena of block falling or agglomeration cannot occur, so that the situation that the grinding materials are easy to fall or agglomerate due to insufficient strength of the grinding blocks when polishing by using a porous structure of a sponge grinding block is avoided, and the ceramic tile has good appearance quality; the grinding tool contains a certain proportion of elastic resin and a certain proportion of grinding materials, so that the grinding tool has strong enough adhesive strength and hardness, the grinding materials in the grinding tool are not easy to fall off in the grinding process, enough grinding force and grinding effect can be kept, and the heat resistance of the grinding tool can avoid the phenomenon of viscose or glue fusion in the polishing process; when the grinding tool is used for polishing, the grinding tool containing different contents of elastic resin and grinding materials is selected for polishing according to the glossiness of the ceramic tile, the application degree of the grinding tool is expanded, and the grinding tool can be used for polishing and forming more ceramic tiles with different glossiness.
The elastic resin comprises an organic silicon rubber bonding agent and an organic silicon rubber cross-linking agent, wherein the organic silicon rubber bonding agent accounts for 20-39.5% and the organic silicon rubber cross-linking agent accounts for 0.5-20% of the weight of the grinding tool.
Therefore, the grinding tool contains the two-component liquid organic silicon rubber, one component of the two-component liquid organic silicon rubber is used as a bonding agent, the other component of the two-component liquid organic silicon rubber is used as a cross-linking agent, and after the two-component liquid organic silicon rubber in the proportion is solidified, the resin has good elasticity, so that the grinding tool has better performance.
Further, the elastic resin is a polyurethane resin.
The elastic resin comprises an elastic polyurethane resin binder and a polyurethane rubber curing agent, wherein the elastic polyurethane resin binder accounts for 25-40% and the polyurethane rubber curing agent accounts for 4-25% of the weight of the grinding tool.
Therefore, the grinding tool contains two-component polyurethane rubber, one component of polyurethane rubber is used as a bonding agent, the other component of polyurethane rubber is used as a curing agent, and the two-component polyurethane rubber in the proportion enables the grinding tool to have good elasticity after being cured.
The polyurethane resin is mainly obtained by the reaction of liquid polyether glycol resin and polyisocyanate, and according to the weight percentage of the grinding tool, the liquid polyether glycol resin accounts for 25-40%, and the polyisocyanate accounts for 12.5-25%.
The polyurethane resin is mainly obtained by reacting liquid polyester polyol resin and polyisocyanate, and the proportion of the polyester polyol resin is 25-40% and the proportion of the polyisocyanate is 10-25% according to the weight percentage of the grinding tool.
Therefore, the liquid polyether polyol resin and the polyisocyanate are mixed and react to obtain the elastic micro-foaming polyurethane, and the liquid polyester polyol resin and the polyisocyanate are mixed and react to obtain the elastic micro-foaming polyurethane.
The further proposal is that the abrasive is at least one of green silicon carbide, black silicon carbide, white corundum, brown corundum, black corundum, diamond or cerium oxide.
It can be seen that the composition and combination of the abrasive can be adapted for use in the polishing process of tiles of different gloss levels.
The further proposal is that the filling material is at least one of quartz stone, calcium carbonate, alumina, chromic oxide and ferric oxide; the wax is at least one of paraffin wax, polyethylene wax, palm wax or stearate; the functional auxiliary may be at least one of a curing accelerator, a coupling agent, an antioxidant, or an antistatic agent.
Therefore, the filling material mainly plays a role in increasing the strength; the wax is used for lubricating, reducing the temperature of a grinding contact point and preventing resin from being burnt; the added functional auxiliary agent can relatively improve the performance of the grinding tool.
In order to achieve the second object, the invention provides a method for preparing a ceramic polishing grinding tool, which is used for preparing the ceramic polishing grinding tool;
the preparation method comprises the following steps:
a. dividing the elastic resin into two parts according to different functions;
b. mixing and stirring the first part of elastic resin, the abrasive and the filler to obtain a first mixture;
c. mixing and stirring a second part of elastic resin, the wax, the functional auxiliary agent and the first mixture to obtain a second mixture;
d. the second mixture is charged into a mold and cooled after solidification.
According to the scheme, the elastic resin is divided into two components according to different functions, so that different functions are achieved in the preparation process, and the grinding tool finally obtained has good performance by avoiding the addition of other impurities.
In order to achieve the second object, the invention provides a method for preparing a ceramic polishing grinding tool, which is used for preparing the ceramic polishing grinding tool; the preparation method comprises the following steps:
a. mixing and stirring liquid polyether polyol resin or liquid polyester polyol, abrasive and filler to obtain a first mixture;
b. mixing and stirring polyisocyanate, wax, functional auxiliary and the first mixture to obtain a second mixture;
c. the second mixture is charged into a mold and cooled after solidification.
Detailed Description
The ceramic polishing grinding tool is suitable for a ceramic polishing process, elastic resin is used as a bonding agent material, and after the elastic resin and the grinding material are combined to form a composite material, the ceramic polishing grinding tool has good elastic toughness, strength and durability, has strong grinding force on ceramic, effectively solves the problems of grinding patterns, scratches and the like during ceramic polishing, and can be used for polishing ceramic tiles with different glossiness and softness by using grinding tools prepared from the elastic resin and the grinding material with different contents. The grinding tool is bonded on the rubber cover surface which can be arranged on a clamping position of the polishing machine, the conventional polishing machine and a grinding disc head are not required to be changed, and the grinding tool is convenient to install or replace.
The ceramic polishing grinding tool comprises 25-50 wt% of elastic resin, 30-70 wt% of grinding material, 0-25 wt% of filler, 0-10 wt% of wax and 0-5 wt% of functional auxiliary agent; the elasticity of the grinding tool is more than 120%, the hardness is 75A-95A, the adhesion strength is more than 6MPa, and the tolerance temperature is more than 150 ℃, preferably, the elasticity of the grinding tool is more than 120%, the hardness is 80A, the adhesion strength is more than 6MPa, and the tolerance temperature is more than 150 ℃. Wherein the elastic resin can be a silicone resin or a polyurethane resin. When the elastic resin is organic silicon resin, the elastic resin in the grinding tool comprises organic silicon resin as a binding agent and organic silicon resin as a cross-linking agent, so that the grinding tool comprises 20-39.5 percent of organic silicon rubber, 0.5-20 percent of organic silicon cross-linking agent, 30-70 percent of grinding material, 0-25 percent of filling material, 0-10 percent of wax and 0-5 percent of functional auxiliary agent according to weight percentage. If the elastic resin is polyurethane resin, the elastic resin in the grinding tool comprises polyurethane resin as a binding agent and polyurethane resin as a curing agent, so that the grinding tool comprises 25-40 wt% of elastic polyurethane rubber, 4-25 wt% of polyurethane curing agent, 30-70 wt% of grinding material, 0-25 wt% of filler, 0-10 wt% of wax and 0-5 wt% of functional auxiliary agent. After the two-component organic silicon resin or polyurethane resin is cured, the elastic resin has better elasticity, so that the grinding tool has better performances of elastic toughness, strength and the like.
As another embodiment, when the elastic resin is a polyurethane resin, a reactant of the polyurethane resin may be selected as a raw material for preparing the abrasive tool. When the grinding tool comprises 25 to 27.5 weight percent of liquid polyether glycol resin, 12.5 to 25 weight percent of polyisocyanate, 30 to 70 weight percent of abrasive, 0 to 25 weight percent of filling material, 0 to 10 weight percent of wax and 0 to 5 weight percent of functional auxiliary agent. In the process of mixing, stirring and curing the raw materials, the liquid polyether glycol resin reacts with the polyisocyanate to obtain the elastic micro-foaming polyurethane resin, and the foaming of the polyurethane resin is controlled to a certain volume to achieve the elasticity and strength required by the elastic resin. The liquid polyether polyol resin can also be replaced by liquid polyether polyol resin, so that the grinding tool comprises 25-40% of liquid polyester polyol resin, 10-25% of polyisocyanate, 30-70% of grinding material, 0-25% of filler, 0-10% of wax and 0-5% of functional auxiliary agent according to weight percentage.
The abrasive is at least one of green silicon carbide, black silicon carbide, white corundum, brown corundum, black corundum, diamond or cerium oxide. The components of the abrasive and the combination of the components can be suitable for polishing the tiles with different gloss degrees. The abrasive grain size may be 60#, 80#, 120#, 180#, 240#, 320#, 400#, 600#, 800#, 1200#, 1500#, 2000# or 3000#, with different abrasives depending on the desired polishing gloss.
The further proposal is that the filling material is at least one of quartz stone, calcium carbonate, alumina, chromic oxide and ferric oxide; the wax is at least one of paraffin wax, polyethylene wax, palm wax or stearate; the functional auxiliary may be at least one of a curing accelerator, a coupling agent, an antioxidant, or an antistatic agent. The particle size of the filler can be 320#, 400#, 600#, 800#, 1200#, 1500#, 2000#, or 3000 #.
When the two-component organic silicon resin or the two-component polyurethane resin is used for preparing the grinding tool, the preparation method of the grinding tool comprises the following steps:
a. dividing the elastic resin into two parts according to different functions;
b. mixing and stirring a first part of elastic resin, an abrasive and a filler according to a proportion to obtain a first mixture;
c. mixing and stirring a second part of elastic resin, the wax, the functional auxiliary agent and the first mixture according to a proportion to obtain a second mixture;
d. the second mixture is charged into a mold and cooled after solidification.
The elastic resin is divided into two components according to different functions, so that different functions are achieved in the preparation process, and the finally obtained grinding tool has good performance by avoiding the addition of other impurities.
When a reactant of polyurethane resin is used as a raw material for manufacturing the abrasive tool, the method for manufacturing the abrasive tool includes the steps of:
a. mixing and stirring liquid polyether polyol resin or liquid polyester polyol, abrasive and filler to obtain a first mixture;
b. mixing and stirring polyisocyanate, wax, functional auxiliary and the first mixture to obtain a second mixture;
c. the second mixture is charged into a mold and cooled after solidification.
In order to make the technical solution and the technical effect of the present invention clearer and clearer, the following examples are given to further describe the specific embodiments of the present invention, but the present invention is not limited thereto.
Example 1
The resilient resin binder used in the abrasive article of example 1 was addition silicone rubber.
The abrasive article of example 1 was prepared by the following method of preparation: pouring 20 parts of organic silicon rubber A, 10 parts of 180# carborundum, 40 parts of 180# green silicon carbide and 4 parts of chromium oxide into a stirring cylinder, stirring at the speed of 1000 rpm for 10 minutes, then adding 20 parts of liquid organic silicon rubber curing agent B, 4.5 parts of liquid paraffin, 1 part of coupling agent and 0.5 part of catalyst, stirring at the speed of 1500 rpm for 5 minutes to form uniform slurry, pouring the slurry into a mold with the length of 13CM, the depth of 1.5CM and the width of 5.5CM, scraping, standing for 1 hour for curing, then placing the mold into a 100-DEG oven for curing for 5 hours, cooling and demolding to obtain the grinding tool.
Example 2
The elastic resin binder in the abrasive article of example 2 was addition silicone rubber.
The abrasive article of example 2 was prepared by the following method of preparation: weighing 25 parts of liquid organic silicon rubber A group, 10 parts of 180# carborundum, 30 parts of 180# green carbonization and 4 parts of chromium oxide, pouring the mixture into a stirring cylinder, stirring the mixture for 10 minutes at the speed of 1000 rpm, then adding 25 parts of liquid organic silicon rubber curing agent B group, 4.5 parts of liquid paraffin, 1 part of coupling agent and 0.5 part of catalyst, stirring the mixture for 5 minutes at the speed of 1500 rpm to form uniform slurry, pouring the slurry into a mold with the length of 13CM, the depth of 1.5CM and the width of 5.5CM, strickling the slurry, standing the slurry for 1 hour for curing, then placing the mold into a 100-DEG oven for curing for 5 hours, cooling and demolding to obtain the grinding tool.
Example 3
The elastic resin binder in the abrasive article of example 3 was a condensed silicone rubber.
The abrasive article of example 3 was prepared by the following method: weighing 39.5 parts of liquid organic silicon rubber A group, 10 parts of 240# carborundum, 40 parts of 240# green silicon carbide and 4 parts of chromium oxide, pouring the mixture into a stirring cylinder, stirring the mixture for 10 minutes at the speed of 1000 rpm, then adding 0.5 part of liquid organic silicon rubber curing agent B group, 4.5 parts of liquid paraffin, 1 part of coupling agent and 0.5 part of catalyst, stirring the mixture for 5 minutes at the speed of 1500 rpm to form uniform slurry, pouring the slurry into a mold with the length of 13CM, the depth of 1.5CM and the width of 5.5CM, strickling the slurry, standing the slurry for 2 hours for curing, then placing the mold into a 100-DEG oven for curing for 5 hours, cooling and demolding.
Example 4
The elastic resin binder in the abrasive article of example 4 was a condensed silicone rubber.
The abrasive article of example 4 was prepared by the following method: weighing 50 parts of liquid organic silicon rubber A group, 10 parts of 180# carborundum, 30 parts of 180# green silicon carbide and 4 parts of chromium oxide, pouring the mixture into a stirring cylinder, stirring the mixture for 10 minutes at the speed of 1000 rpm, then adding 0.5 part of liquid organic silicon rubber curing agent B group, 4.5 parts of liquid paraffin, 1 part of coupling agent and 0.5 part of catalyst, stirring the mixture for 5 minutes at the speed of 1500 rpm to form uniform slurry, pouring the slurry into a mold with the length of 13CM, the depth of 1.5CM and the width of 5.5CM, strickling off, standing the slurry for 1 hour for curing, then placing the mold into a 100-DEG oven for curing for 5 hours, and demolding after cooling to obtain a grinding tool.
Comparative example 1
The abrasive article in comparative example 1 was prepared differently from that in example 1 in that: in comparative example 1, no silicone rubber curing agent group B was added.
Comparative example 2
The abrasive article of comparative example 2 was prepared differently from example 2 in that: the condensed curing agent tetraethoxysilane is used for replacing the organic silicon rubber curing agent B group.
Example 5
The resilient resin binder in the abrasive article of example 5 was an elastomeric urethane rubber.
The abrasive article of example 5 was prepared by the following method: weighing 36 parts of a liquid elastic polyurethane prepolymer resin A group, 10 parts of 400# carborundum, 25 parts of 400# green silicon carbide, 15 parts of 800# aluminum oxide and 4 parts of chromium oxide, pouring the mixture into a stirring cylinder, stirring the mixture for 10 minutes at the speed of 1000 rpm, then adding 4 parts of a polyurethane resin curing agent B group, 4.5 parts of barium stearate, 1 part of a coupling agent and 0.5 part of a catalyst, stirring the mixture for 5 minutes at the speed of 1500 rpm to form uniform slurry, pouring the slurry into a mold with the length of 13CM, the depth of 1.5CM and the width of 5.5CM, leveling, standing the slurry for 2 hours, then placing the mold into a 120-degree oven for curing for 5 hours, cooling and demolding to obtain the grinding tool.
Example 6
The resilient resin binder in the abrasive article of example 6 was elastomeric urethane rubber.
The abrasive article of example 6 was prepared by the following method: weighing 25 parts of a liquid elastic polyurethane prepolymer resin A group, 10 parts of 400# carborundum, 25 parts of 400# green silicon carbide, 15 parts of 800# aluminum oxide and 4 parts of chromium oxide, pouring the mixture into a stirring cylinder, stirring the mixture for 10 minutes at the speed of 1000 rpm, then adding 25 parts of a polyurethane resin curing agent B group, 4.5 parts of barium stearate, 1 part of a coupling agent and 0.5 part of a catalyst, stirring the mixture for 5 minutes at the speed of 1500 rpm to form uniform slurry, pouring the slurry into a mold with the length of 13CM, the depth of 1.5CM and the width of 5.5CM, leveling, standing the slurry for 2 hours, then placing the mold into a 120-DEG oven for curing for 5 hours, cooling and demolding to obtain the grinding tool. Wherein the number of long-chain groups in the polyurethane resin a group in example 5 is larger than that in the polyurethane resin a group in example 6, and the number of long-chain groups in the polyurethane resin B group in example 5 is smaller than that in the polyurethane resin B group in example 6.
Example 7
The resilient resin binder in the abrasive article of example 7 was a polyurethane resin.
The abrasive article of example 7 was prepared by the following method: weighing 30 parts of a liquid elastic polyurethane prepolymer resin A group, 10 parts of 400# carborundum, 25 parts of 400# green silicon carbide, 15 parts of 800# aluminum oxide and 4 parts of chromium oxide, pouring the mixture into a stirring cylinder, stirring the mixture for 10 minutes at the speed of 1000 rpm, then adding 10 parts of a polyurethane resin curing agent B group, 4.5 parts of barium stearate, 1 part of a coupling agent and 0.5 part of a catalyst, stirring the mixture for 5 minutes at the speed of 1500 rpm to form uniform slurry, pouring the slurry into a mold with the length of 13CM, the depth of 1.5CM and the width of 5.5CM, leveling, standing the slurry for 2 hours, then placing the mold into a 120-degree oven for curing for 5 hours, cooling and demolding to obtain the grinding tool.
Comparative example 3
The abrasive article of comparative example 3 was prepared differently from the abrasive article of example 5 in that: the polyurethane tree curing agent group B is not added.
Comparative example 4
The abrasive article of comparative example 4 used a non-elastic resin.
Comparative example 4 the abrasive article was prepared by the following preparation method: weighing 40 parts of non-elastic resin epoxy, 10 parts of 400# carborundum, 25 parts of 400# green silicon carbide, 15 parts of 800# aluminum oxide and 4 parts of chromium oxide, pouring the mixture into a stirring cylinder, stirring the mixture for 10 minutes at the speed of 1000 rpm, then adding 4.5 parts of barium stearate, 1 part of coupling agent and 0.5 part of catalyst, stirring the mixture for 5 minutes at the speed of 1500 rpm to form uniform slurry, pouring the slurry into a mold with the length of 13CM, the depth of 1.5CM and the width of 5.5CM, scraping the slurry, standing the slurry for 2 hours for solidification, then placing the mold into a 120-DEG oven for solidification for 5 hours, and cooling and demolding to obtain the grinding tool.
Example 8
The resilient resin binder in the abrasive article of example 8 was resilient microcellular polyurethane.
The abrasive article of example 8 was prepared by the following method: weighing 37.5 parts of liquid polyester polyol resin A group, 5 parts of 600# carborundum, 15 parts of 600# white corundum, 15 parts of 600# aluminum oxide and 4 parts of chromium oxide, pouring the mixture into a stirring cylinder, stirring the mixture for 10 minutes at the speed of 1500 rpm, then adding 12.5 parts of polyisocyanate B group, 4.6 parts of barium stearate, 1 part of coupling agent, 0.2 part of catalyst and 0.2 part of foaming agent, stirring the mixture for 2 minutes at the speed of 3000 rpm to form uniform slurry, pouring the slurry into a mold with the length of 13CM, the depth of 1.5CM and the width of 5.5CM according to the mass density of 0.9, sealing and foaming, standing the slurry for 2 hours for solidification, then placing the mold into a 120-degree oven for solidification for 5 hours, and cooling and demolding to obtain the grinding tool.
Example 9
The abrasive article of example 9 was selected to use an elastomeric microcellular polyurethane resin as the binder.
The abrasive article of example 9 was prepared by the following method: weighing 25 parts of liquid polyester polyol resin A group, 5 parts of 600# carborundum, 15 parts of 600# white corundum, 15 parts of 600# aluminum oxide and 4 parts of chromium oxide, pouring the mixture into a stirring cylinder, stirring the mixture for 10 minutes at the speed of 1500 rpm, then adding 25 parts of polyisocyanate B group, 4.6 parts of barium stearate, 1 part of coupling agent, 0.2 part of catalyst and 0.2 part of foaming agent, stirring the mixture for 5 minutes at the speed of 3000 rpm to form uniform slurry, pouring the slurry into a mold with the length of 13CM, the depth of 1.5CM and the width of 5.5CM according to the mass density of 0.9, sealing and foaming the slurry, standing the slurry for 2 hours for solidification, then placing the mold into a 120-DEG oven for solidification for 5 hours, cooling and demolding to obtain the grinding tool.
Example 10
The abrasive article of example 10 was selected to use an elastomeric microcellular polyurethane resin as the binder.
The abrasive article of example 10 was prepared by the following method: weighing 40 parts of liquid polyether polyol resin A group, 5 parts of 800# carborundum, 15 parts of 800# brown corundum, 15 parts of 800# aluminum oxide and 4 parts of ferric oxide, pouring the mixture into a stirring cylinder, stirring the mixture for 10 minutes at the speed of 1000 revolutions per minute, then adding 10 parts of polyisocyanate B group, 4.7 parts of barium stearate, 1 part of coupling agent, 0.1 part of catalyst and 0.2 part of foaming agent, stirring the mixture for 5 minutes at the speed of 1500 revolutions per minute to form uniform slurry, pouring the slurry into a mold with the length of 13CM, the depth of 1.5CM and the width of 5.5CM according to the mass density of 0.9, sealing and foaming, standing the slurry for 2 hours for solidification, then placing the mold into a 120-degree oven for solidification for 5 hours, cooling and demolding to obtain the grinding tool.
Example 11
The abrasive article of example 11 was formed using an elastomeric microcellular polyurethane resin as the binder.
The abrasive article of example 11 was prepared by the following method: weighing 25 parts of liquid polyether polyol resin A group, 5 parts of 800# carborundum, 15 parts of 800# brown corundum, 15 parts of 800# aluminum oxide and 4 parts of ferric oxide, pouring the mixture into a stirring cylinder, stirring the mixture for 10 minutes at the speed of 1500 rpm, then adding 25 parts of polyisocyanate B group, 4.7 parts of barium stearate, 1 part of coupling agent, 0.1 part of catalyst and 0.2 part of foaming agent, stirring the mixture for 3 minutes at the speed of 3000 rpm to form uniform slurry, pouring the slurry into a mold with the length of 13CM, the depth of 1.5CM and the width of 5.5CM according to the mass density of 0.9, sealing and foaming the slurry, standing the slurry for 2 hours for solidification, then placing the slurry into a 120-DEG oven for solidification for 5 hours, cooling and demolding to obtain the grinding tool. Since the content of the active groups in the polyether polyol in example 10 is larger than that in the polyether polyol in example 11, the number of long-chain groups of the polyurethane resin in example 10 after the polyether polyol is reacted with the polyisocyanate is larger than that of the polyurethane resin in example 11.
Example 12
The abrasive article of example 12 used an elastic resin binder and an elastic microcellular polyurethane resin.
The abrasive article of example 12 was prepared by the following method: weighing 35 parts of a liquid polyether polyol resin A group, 5 parts of a chain extender, 5 parts of 800# carborundum, 15 parts of 800# white corundum, 15 parts of 800# aluminum oxide and 4 parts of cerium oxide, pouring the mixture into a stirring cylinder, stirring the mixture for 10 minutes at the speed of 1500 rpm, then adding 10 parts of polyisocyanate (B group), 4.6 parts of barium stearate, 1 part of a coupling agent, 0.1 part of a catalyst and 0.3 part of a foaming agent, stirring the mixture for 3 minutes at the speed of 3000 rpm to form uniform slurry, pouring the uniform slurry into a mold with the length of 13CM, the depth of 1.5CM and the width of 5.5CM according to the mass density of 0.9, sealing and foaming, standing the mixture for 2 hours for solidification, then placing the mixture into a 120-degree furnace for solidification for 5 hours, and demolding after cooling to obtain the grinding tool. Wherein the polyether polyol resin of example 12 has a lower content of long-chain groups than the polyether polyol resin of example 11.
The shore hardness, tensile strength, elongation at break, tear strength, resilience, heat resistance and akron abrasion of the abrasive tools in the examples and comparative examples were measured and recorded, and the specific measurement results are shown in table 1.
TABLE 1
As can be seen from table 1, the grinding tools in examples 1 to 4 include two-component silicone resin, and the grinding tools finally prepared have little difference from each other, wherein the grinding tools in examples 1 and 2 can be used at a ceramic plate surface luminosity of 20 to 30 degrees, the grinding tool in example 3 can be used at a ceramic plate surface luminosity of 23 to 25 degrees, the grinding tool in example 4 can be used at a ceramic plate surface luminosity of 25 to 28 degrees, and in examples 1 to 4, the grinding tool prepared by using the condensed type silicone rubber is more suitable for a coarse grinding material than the grinding tool prepared by using the addition type silicone rubber, and a grinding material with a finer luminosity is obtained after polishing. In the comparative example 1, no curing agent is added in the preparation process of the grinding tool, and the grinding tool cannot be finally formed after curing; in the comparative example 2, the curing agent which is not the same as the binder is added in the preparation process of the grinding tool, so that the curing effect is poor or even the grinding tool cannot be cured. The abrasive articles of examples 5 to 7 comprised two-component polyurethane resin, the final performance of the abrasive articles of examples 5 and 7 was not significantly different from that of the abrasive articles of examples 1 to 4, and the abrasive articles of examples 5 and 6 were suitable for use with ceramic plate finishes ranging from 30 to 35 degrees; similarly, in comparative example 3, no curing agent is added, so that the abrasive cannot be cured to form the abrasive, and in comparative example 4, a curing agent which is not the same as the binder is added, so that the curing effect is poor, even the curing cannot be performed, and therefore, a better curing effect can be achieved by adding the two-component elastic resin in the process of preparing the abrasive. Examples 8 and 9 obtained polyurethane resins from the reaction of polyester polyol with polyisocyanate, examples 10, 11 and 12 obtained polyurethane resins from the reaction of polyether polyol with polyisocyanate, and examples 8 to 12 obtained abrasive articles with little difference in final properties, although examples 8 and 9 used polyester polyol and examples 10 to 12 used polyether polyol, the final abrasive articles obtained similar elastic toughness after reaction through microfoaming. In examples 5 and 6, the number of long chain groups between groups A and B in the two groups of examples was different, but after A and B were cured, the final properties of the abrasive article were similar. In examples 11 and 12, since the polyether polyol resin of example 12 had a lower content of long chain groups than the polyether polyol resin of example 11, the final properties of the abrasive article of example 12 and the abrasive article of example 11 did not differ much after the addition of the chain extender in example 12. The abrasive articles of examples 8 and 9 were suitable for polishing ceramic panels at a gloss level of 40 to 45 degrees; the abrasive articles of examples 10 and 11 were suitable for polishing ceramic panels at a gloss level of 50 to 55 degrees; the abrasive article of example 12 was suitable for polishing ceramic panels at a gloss level of 60 to 65 degrees. The grinding tool prepared by adopting different raw materials in the embodiments 1 to 12 has similar performance, the grinding tool is stuck on the clamping seat by glue, and then the ceramic is polished on the polishing machine, so that the luminosity range of the ceramic plate surface is wide, the surface lines are uniform, no grinding flower and no scratch are caused, and the grinding tool does not have the phenomena of agglomeration, block falling, sticking and the like.
Finally, it should be emphasized that the above-described preferred embodiments of the present invention are merely examples of implementations, rather than limitations, and that many variations and modifications of the invention are possible to those skilled in the art, without departing from the spirit and scope of the invention.
Claims (10)
1. The ceramic polishing grinding tool is characterized in that: according to weight percentage, the material comprises 25 to 50 percent of elastic resin, 30 to 70 percent of abrasive, 0 to 25 percent of filling material, 0 to 10 percent of wax and 0 to 5 percent of functional auxiliary agent;
the elasticity of the grinding tool is more than 120%, the hardness is 75-95A, the adhesion strength is more than 6MPa, and the resistance temperature is more than 150 ℃.
2. The ceramic polishing abrasive tool of claim 1, wherein:
the elastic resin comprises an organic silicon rubber bonding agent and an organic silicon rubber cross-linking agent, and according to the weight percentage of the grinding tool, the organic silicon rubber bonding agent accounts for 20-39.5%, and the organic silicon rubber cross-linking agent accounts for 0.5-20%.
3. The ceramic polishing abrasive tool of claim 1, wherein:
the elastic resin is polyurethane resin.
4. The ceramic polishing abrasive tool of claim 3, wherein:
the elastic resin comprises an elastic polyurethane resin binder and a polyurethane rubber curing agent, wherein the elastic polyurethane resin binder accounts for 25-40% and the polyurethane rubber curing agent accounts for 4-25% of the weight of the grinding tool.
5. The ceramic polishing abrasive tool of claim 3, wherein:
the polyurethane resin is mainly obtained by reacting liquid polyether glycol resin and polyisocyanate, wherein the liquid polyether glycol resin accounts for 25-40% of the weight of the grinding tool, and the polyisocyanate accounts for 12.5-25%.
6. The ceramic polishing abrasive tool of claim 3, wherein:
the polyurethane resin is mainly obtained by reacting liquid polyester polyol resin and polyisocyanate, and according to the weight percentage of the grinding tool, the polyester polyol resin accounts for 25-40%, and the polyisocyanate accounts for 10-25%.
7. The ceramic polishing abrasive tool according to any one of claims 1 to 6, characterized in that:
the abrasive is at least one of green silicon carbide, black silicon carbide, white corundum, brown corundum, black corundum, diamond or cerium oxide.
8. The ceramic polishing abrasive tool according to any one of claims 1 to 6, characterized in that:
the filler is at least one of quartz stone, calcium carbonate, alumina, chromium oxide and ferric oxide; the wax is at least one of paraffin wax, polyethylene wax, palm wax or stearate; the functional auxiliary may be at least one of a curing accelerator, a coupling agent, an antioxidant, or an antistatic agent.
9. The preparation method of the ceramic polishing grinding tool is characterized by comprising the following steps: the production method is used for producing the ceramic polishing abrasive tool according to any one of claims 1 to 4;
the preparation method comprises the following steps:
a. dividing the elastic resin into two parts according to different functions;
b. mixing and stirring a first part of the elastic resin, the abrasive and the filler to obtain a first mixture;
c. mixing and stirring a second part of the elastic resin with the wax, the functional auxiliary and the first mixture to obtain a second mixture;
d. and filling the second mixture into a mold, solidifying and cooling.
10. The preparation method of the ceramic polishing grinding tool is characterized by comprising the following steps: the manufacturing method is used for manufacturing the ceramic polishing grinding tool according to claim 5 or 6;
the preparation method comprises the following steps:
a. mixing and stirring the liquid polyether polyol resin or the liquid polyester polyol resin, the abrasive and the filler to obtain a first mixture;
b. mixing and stirring the polyisocyanate with the wax, the functional auxiliary and the first mixture to obtain a second mixture;
c. and filling the second mixture into a mold, solidifying and cooling.
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