KR20160100984A - Abrasive, abrasive article and the method for preparing the same - Google Patents

Abstract

There is provided an abrasive comprising abrasive particles and an adhesive matrix, wherein the abrasive particles are distributed in an adhesive matrix, the abrasive particles comprise aluminum hydroxide abrasive particles, and the adhesive matrix comprises a triacrylate, a diacrylate and an initiator. An abrasive article made using the abrasive article of the present invention has adequate wear resistance and can be used to clean an LCD panel surface without scratching the ITO coating on the surface of the LCD panel.

Description

BACKGROUND OF THE INVENTION Field of the Invention [0001] The present invention relates to abrasive articles, abrasive articles,

The present invention relates to a polishing field, in particular, an abrasive article, a polishing article and a method of manufacturing the article.

In the manufacturing method of the LCD panel, there is a cleaning step of the surface of the LCD panel. At this stage, a scraping knife or abrasive band is typically used to remove impurities or glass debris from the surface of the LCD panel.

However, scraping knives can not be used to clean LCD panel surfaces with ITO (transparent and conductive indium-tin oxide film) coating, because it can scratch ITO coatings. Conventional abrasive bands used to clean ITO coatings on the surface of LCD panels primarily include aluminum oxide abrasive particles capable of scratching ITO coatings, affecting the yield rate of LCD panels.

Therefore, there is a need to develop new abrasives and new abrasive articles that can be used to clean LCD panel surfaces without scratching the ITO coating on the surface of the LCD panel.

It is an object of the present invention to provide a new abrasive and abrasive article having a relatively low wear resistance and using the abrasive article to clean an LCD panel surface without scratching the ITO coating on the surface of the LCD panel.

According to an aspect of the present invention there is provided an abrasive comprising abrasive particles and an adhesive matrix, wherein the abrasive particles are distributed within an adhesive matrix, the abrasive particles comprise aluminum hydroxide abrasive grains and the adhesive matrix comprises a triacrylate, Rate and initiator.

According to certain preferred embodiments of the invention, the aluminum hydroxide abrasive particles have an average particle size of 0.5 to 10 占 퐉.

According to certain preferred embodiments of the present invention, the aluminum hydroxide abrasive particles are present in an amount of 15 to 30 wt.%, Based on the total weight of the abrasive as 100 wt.%.

According to certain preferred embodiments of the present invention, the abrasive particles may further comprise calcium carbonate abrasive particles.

According to certain preferred embodiments of the present invention, the calcium carbonate abrasive grains have an average particle size of 0.5 to 5 占 퐉.

According to certain preferred embodiments of the present invention, the calcium carbonate abrasive particles are present in an amount of 0.5 to 5 wt.%, Based on the total weight of the abrasive as 100 wt.%.

According to certain preferred embodiments of the present invention, the abrasive particles further comprise aluminum oxide abrasive particles.

According to certain preferred embodiments of the present invention, the aluminum oxide abrasive grains have an average particle size of 0.5 to 5 占 퐉.

According to certain preferred embodiments of the present invention, the aluminum oxide abrasive particles are present in an amount of 0.5 to 2 wt.%, Based on the total weight of the abrasive as 100 wt.%.

According to certain preferred embodiments of the present invention, the adhesive matrix is present in an amount of 60 to 85 wt.%, Based on the total weight of the abrasive as 100 wt.%.

According to certain preferred embodiments of the present invention, the triacrylate has an average molecular weight of from 150 to 500.

According to certain preferred embodiments of the present invention, the triacrylate is selected from one or more from the group consisting of isocyanurate-acrylate and trimethylolpropane triacrylate.

According to certain preferred embodiments of the present invention, the triacrylate is present in an amount of 10 to 40 wt.%, Based on the total weight of the abrasive as 100 wt.%.

According to certain preferred embodiments of the present invention, the diacrylate has an average molecular weight of 100 to 600.

According to certain preferred embodiments of the present invention, the diacrylate is selected from one or more from the group consisting of polyethylene glycol (200) diacrylate and oxyethylene bisphenol A diacrylate.

According to certain preferred embodiments of the present invention, the diacrylate is present in an amount of 30 to 60 wt.%, Based on the total weight of the abrasive as 100 wt.%.

According to certain preferred embodiments of the present invention, the initiator is present in an amount of 0.1 to 5 wt.%, Based on the total weight of the abrasive as 100 wt.%.

According to certain preferred embodiments of the present invention, the adhesive matrix may further comprise one or more from the group consisting of a surfactant, a suspending agent, a coupling agent or a dispersing agent.

According to another aspect of the present invention, there is provided an abrasive article comprising a cured abrasive provided in accordance with the present invention.

According to certain preferred embodiments of the present invention, the abrasive article comprises a protruding member or a plurality of projecting members.

According to certain preferred embodiments of the present invention, the cross sectional shape of the projecting member in the horizontal direction includes at least one of the group consisting of a triangle, a rectangle, a rhombus, a pentagon, a hexagon, a circle and an ellipse.

According to certain preferred embodiments of the present invention, the upper surface of the projecting member is parallel to the cross-section of the projecting member in the horizontal direction.

According to certain preferred embodiments of the present invention, the projecting member has a pyramidal structure.

According to certain preferred embodiments of the present invention, the protruding member has a height of 10 to 500 [mu] m.

According to certain preferred embodiments of the present invention, the plurality of projecting members have the same height.

According to certain preferred embodiments of the present invention, the plurality of projecting members are regularly arranged.

According to certain preferred embodiments of the present invention, the abrasive article further comprises a backing layer on which the projecting members are disposed.

According to certain preferred embodiments of the present invention, the backing layer material comprises at least one of the group consisting of a polyethylene film, a polyester woven fabric, a blended woven fabric, a cotton woven fabric and a paper.

According to certain preferred embodiments of the present invention, a primer coating layer is contained between the projecting member and the backing layer.

According to certain preferred embodiments of the present invention, the material for the primer coating layer comprises at least one from the group consisting of a polyurethane and an ethylene / acrylic acid copolymer.

According to another aspect of the present invention, there is provided a method of manufacturing an abrasive article comprising curing the abrasive provided in accordance with the present invention.

According to certain preferred embodiments of the present invention, the abrasive may be cured by ultraviolet light.

According to certain preferred embodiments of the present invention, the intensity of ultraviolet light is 500 to 700 watts / decimeter, preferably 600 watts / decimeter.

According to certain preferred embodiments of the present invention, prior to the step of curing the abrasive, the abrasive provided in accordance with the present invention may first be placed on the backing layer. Preferably, the abrasive provided in accordance with the present invention may be disposed on the backing layer by coating application.

According to certain preferred embodiments of the present invention, the backing layer material comprises at least one of the group consisting of a polyethylene film, a polyester woven fabric, a blended woven fabric, a cotton woven fabric and a paper.

According to certain preferred embodiments of the present invention, the primer coating layer is first placed on the backing layer prior to placing the abrasive on the backing layer.

According to certain preferred embodiments of the present invention, the material for the primer coating layer comprises at least one from the group consisting of a polyurethane and an ethylene / acrylic acid copolymer.

The abrasive article provided in accordance with the present invention has relatively low abrasion resistance and can be used to clean the LCD panel surface without scratching the ITO coating on the surface of the LCD panel.

The above summary is not intended to describe each disclosed embodiment of every implementation of the present invention. The features and advantages of the above embodiments and additional embodiments of the present invention will become more apparent from the following detailed description of exemplary embodiments of the invention when taken in conjunction with the drawings.

IA is a top view of an abrasive article provided in accordance with some preferred embodiments of the present invention;
1B is a cross-sectional view in the vertical direction of a polishing article provided in accordance with some preferred embodiments of the present invention;
Figure 2a is a plan view of a rectangular mold cavity for manufacturing an abrasive article provided in accordance with some preferred embodiments of the present invention;
Figure 2b is a cross-sectional view in the vertical direction of a rectangular mold cavity for producing an abrasive article provided in accordance with some preferred embodiments of the present invention;
3 is a schematic diagram of a Schiefer test.

It is to be understood that various other embodiments may be contemplated and modified by those skilled in the art in light of the teachings of the present disclosure without departing from the scope and spirit of the invention. Accordingly, the following detailed description should not be construed in a limiting sense.

Unless otherwise indicated, all numbers expressing feature sizes, amounts, and physical properties used in the specification and claims are to be understood as being modified in all instances by the term "about ". Accordingly, unless indicated to the contrary, the numerical parameters set forth in the foregoing specification and the appended claims are approximations that may vary depending upon the desired properties sought to be obtained by those skilled in the art using the teachings disclosed herein. Descriptions of numerical ranges by endpoints include all numbers contained within that range and any range within that range. For example, 1, 2, 3, 4, and 5 include 1, 1.1, 1.3, 1.5, 2, 2.75, 3, 3.80, 4,

Abrasive

The present invention provides an abrasive that can be cured to obtain abrasive articles having relatively low abrasion resistance and can be used to clean the LCD panel surface without scratching the ITO coating on the LCD panel surface.

The abrasive material provided by the present invention comprises abrasive particles and an adhesive matrix, wherein the abrasive particles are distributed in an adhesive matrix, the abrasive particles comprise aluminum hydroxide abrasive particles, and the adhesive matrix comprises a triacrylate, a diacrylate, .

The aluminum hydroxide abrasive particles have an average particle size of 0.5 to 10 μm, preferably 0.5 to 5 μm, more preferably 0.5 to 1 μm. The aluminum hydroxide abrasive particles are present in an amount of 15 to 30 wt.%, Preferably 25 to 30 wt.%, Based on the total weight of the abrasive as 100 wt.%.

The abrasive grains may further comprise calcium carbonate abrasive grains. The calcium carbonate abrasive grains have an average particle size of 0.5 to 5 μm, preferably 1 to 3 μm. The calcium carbonate abrasive particles are present in an amount of 0.5 to 5 wt.%, Preferably 1 to 5 wt.%, Based on the total weight of the abrasive as 100 wt.%.

The abrasive grains may further comprise aluminum oxide abrasive grains. The aluminum oxide abrasive particles have an average particle size of 0.5 to 5 μm, preferably 1 to 3 μm. The aluminum oxide abrasive particles are present in an amount of 0.5 to 2 wt.%, Preferably 1 to 2 wt.%, Based on the total weight of the abrasive as 100 wt.%.

The adhesive matrix is present in an amount of 60 to 85 wt.%, Based on the total weight of the abrasive as 100 wt.%

The triacrylate has an average molecular weight of 150 to 500, preferably 200 to 500. The triacrylate is preferably selected from one or more from the group consisting of isocyanurate-acrylate and trimethylolpropane triacrylate. For example, triacrylate isocyanurate-acrylate SR368D or trimethylolpropane triacrylate SR351 commercially available from Sartomer Corp. may be selected. The triacrylate is present in an amount of 10 to 40 wt.%, Based on the total weight of the abrasive as 100 wt.%. The triacrylate can be used to enhance the adhesive performance of the adhesive matrix so that the abrasive particles are bonded into the adhesive matrix. Moreover, triacrylate can be additionally used to bond the abrasive and backing layer together. In addition, the triacrylate can help cure the abrasive to form an abrasive article (see "abrasive article" in this document for a "abrasive article"). If the abrasive does not have triacrylate, the adhesive matrix will be too soft and the abrasive will fail to cure to form the abrasive article.

The diacrylate has an average molecular weight of 100 to 600, preferably 200 to 600. The diacrylate may be selected from one or more of the group consisting of polyethylene glycol (200) and oxyethylene bisphenol A diacrylate. For example, polyethylene glycol (200) diacrylate SR259 or oxyethylene bisphenol A diacrylate SR601, commercially available from Satoromarkoff, may be selected. The diacrylate is present in an amount of 30 to 60 wt.%, Based on the total weight of the abrasive as 100 wt.%. The diacrylate will help to ensure that the abrasive article formed after curing of the abrasive has a relatively low abrasion resistance so that scratches will not be produced on the ITO coating on the surface of the LCD panel. If the abrasive does not have a diacrylate, the abrasive matrix will be too stiff and the abrasion resistance of the abrasive article formed after curing of the abrasive is too high, resulting in scratches on the ITO coating on the surface of the LCD panel. Moreover, the diacrylate may also help to increase the hydrophilicity of the abrasive so that the abrasive article formed after curing of the abrasive has adequate abrasion resistance under water abrasion conditions. This can better control the abrasion rate of the abrasive article so that the abrasive article will wear too quickly and not too slowly. If the abrasive article is worn too quickly, its service life will be shortened, and if it is too slow, a scratch will be created on the ITO coating on the LCD panel surface.

The initiator can facilitate curing of the abrasive and will not only allow the abrasive grains to bond within the adhesive matrix, but will also allow the abrasive and backing layers to be joined together. The initiator may preferably be selected from one or more of the group consisting of photoinitiators or thermal radical initiators. The photoinitiator may preferably be selected from one or more of the group consisting of an ultraviolet initiator and a photo-activator, more preferably a UV initiator. For ultraviolet initiators, for example, Irgacure 819 commercially available from Ciba Corp. may be selected and used for photo-activating initiators such as, for example, BASF Corp. TPO-L commercially available from BASF Corp. may be selected. For thermal radical initiators, for example, VAZO 52 or VAZO 67 commercially available from Dupont Corp. may be selected. The initiator is present in an amount of 0.1 to 5 wt.%, Based on the total weight of the abrasive as 100 wt.%.

The adhesive matrix may further comprise one or more of the group consisting of a surfactant, a suspending agent, a coupling agent, and a dispersing agent.

Surfactants can be used to improve bond strength and affinity between the adhesive matrix and backing. The surfactant may preferably be selected from one or more of the group consisting of an ionic surfactant, a cationic surfactant and a nonionic surfactant, more preferably a nonionic surfactant. The nonionic surfactant is preferably an alcohol ether surfactant. For alcohol ether surfactants, for example, Tergitol 15-S-5, commercially available from DuPont Corp., may be selected. The surfactant is present in an amount of 0.1 to 10 wt.%, Based on the total weight of the abrasive as 100 wt.%.

Suspension can be used to reduce the precipitation of abrasive particles in the adhesive matrix. The suspending agent may preferably be amorphous silicon oxide particles, more preferably amorphous silicon oxide particles having a surface area of less than 150 m < ² > / g. For amorphous silicon oxide particles having a surface area of less than 150 m < ² > / g, for example, OX50 commercially available from Evonik Corp. may be selected. The suspending agent is present in an amount of 1 to 5 wt.%, Preferably 1 to 2 wt.%, Based on the total weight of the abrasive as 100 wt.%.

The coupling agent may provide an association bridge between the adhesive matrix and the abrasive particles. The coupling agent may preferably be selected from one or more members selected from the group consisting of a silane coupling agent, a titanate coupling agent, and a zirconium aluminate coupling agent. The coupling agent may be added in a different manner depending on the purpose. For example, a coupling agent may be added directly to the adhesive matrix. The coupling agent is preferably present in an amount of from 0.1 to 5 wt.%, More preferably from 0.1 to 3 wt.%, Based on the total weight of the abrasive as 100 wt.%.

A dispersant may be used to reduce the viscosity of the adhesive matrix so that abrasive particles are uniformly distributed within the adhesive matrix. The dispersing agent may preferably be an anchoring polymer dispersing agent. For anchoring polymer dispersants, for example, Solplus D520, commercially available from Lubrizol Corp., may be selected. The dispersant is present in an amount of 0.1 to 0.5 wt.%, Preferably 0.1 to 0.3 wt.%, Based on the total weight of the abrasive as 100 wt.%.

The abrasives provided by the present invention have relatively low abrasion resistance and can be used to clean the LCD panel surface without scratching the ITO coating on the surface of the LCD panel.

Abrasive article

The present invention further provides an abrasive article. The abrasive article comprises an abrasive layer comprising a cured abrasive material provided by the present invention. For a description of "abrasives ", see the" abrasives "section of this specification.

1A and 1B, the abrasive article 100 includes a backing layer 110 and one protrusion member 120 or a plurality of protrusion members 120 disposed on the backing layer 110 do. The abrasive article 100 can be used to clean the LCD panel surface without scratching the ITO coating on the surface of the LCD panel.

The material for backing layer 110 may preferably be selected from one or more of the group consisting of polyethylene backing, polyester woven backing, blended woven backing, cotton woven backing and paper backing, more preferably polyethylene backing. For example, a commercially available polyethylene backing from 3M Corp. may be selected.

The cross-sectional shape of the projecting member 120 in the horizontal direction is preferably at least one of a triangle, a rectangle, a rhombus, a pentagon, a hexagon, a circle and an ellipse, more preferably a rectangle, a rectangle, Can be selected. The cross-sectional area of the projecting member 120 in the horizontal direction may be preferably 0.25 to 5 mm 2, more preferably 1 to 3 mm 2.

The upper surface of the protruding member 120 may be parallel or not parallel to the cross-section of the protruding member 120 in the horizontal direction. Preferably, the upper surface of the projecting member 120 is parallel to the cross-section of the projecting member 120 in the horizontal direction. The shape of the upper surface of the protruding member 120 may be the same as or different from the sectional shape of the protruding member 120 in the horizontal direction. Preferably, the shape of the upper surface of the protruding member 120 is the same as the sectional shape of the protruding member 120 in the horizontal direction. The area of the upper surface of the projecting member 120 may be the same as or different from the area of the cross section of the projecting member 120 in the horizontal direction. Preferably, the area of the upper surface of the projecting member 120 is equal to the area of the cross-section of the projecting member 120 in the horizontal direction.

Furthermore, the protruding member 120 may have a pyramidal structure.

The height of the protruding member 120 is represented by h ₁ , preferably h ₁ = 10 to 500 μm, and more preferably h ₁ = 200 to 350 μm.

When the polishing article 100 comprises a plurality of protruding members 120, the height h ₁ of these protruding member 120 may be the same or different. Preferably, the projected height h ₁ of the members 120 are the same, and this helps to clean the LCD panel surface abrasive article is not to scratch the ITO coating on the LCD panel surface.

If the abrasive article 100 includes a plurality of projecting members 120, these projecting members 120 may be arranged regularly or irregularly. Preferably, these protruding members 120 are regularly arranged, which helps the polishing article clean the LCD panel surface without scratching the ITO coating on the LCD panel surface.

The abrasive article 100 may further include a primer coating layer 130 (not shown in the figure). The adhesion force between the backing layer 110 and the protruding member 120 can be increased by using the primer coating layer 130. The material for primer coating layer 130 may be selected from one or more of the group consisting of polyurethane and ethylene acrylic acid copolymer, more preferably ethylene acrylic acid copolymer.

Method of manufacturing an abrasive article

The present invention provides a method of making an abrasive article comprising curing the abrasive material provided in accordance with the present invention.

For a description of "abrasives ", see the" abrasives "section of this specification.

As shown in FIGS. 2A and 2B, the step of curing the abrasive material provided according to the present invention can be performed by putting an abrasive material into the mold 200.

As shown in FIGS. 2A and 2B, the mold 200 includes one cavity 220 or a plurality of cavities 220. The mold 200 may be fabricated by micro-replication techniques. The cross sectional shape of cavity 220 in the horizontal direction is preferably selected from one or more of the group consisting of triangular, rectangular, rectangular, rhombic, pentagonal, hexagonal, circular and elliptical, more preferably rectangular, . The area of the bottom surface of the cavity 220 is preferably 0.25 to 5 mm 2, more preferably 1 to 3 mm 2.

Preferably, the sidewalls of cavity 220 are perpendicular to the bottom surface.

Preferably, the bottom surface of the cavity 220 is parallel to the cross-section of the cavity 220 in the horizontal direction. Preferably, the shape of the bottom surface of the cavity 220 is the same as the cross-sectional shape of the cavity 220 in the horizontal direction. Preferably, the area of the bottom surface of the cavity 220 is equal to the area of the cross section of the cavity 220 in the horizontal direction.

Moreover, the cavity 220 may have an inverted pyramidal structure.

The depth of the cavity 220 is represented by b ₁ , preferably b ₁ = 10 to 500 μm, and more preferably b ₁ = 200 to 350 μm. If the mold 200 comprises a plurality of cavities 220, the depth b ₁ of these cavities 220 may be the same or different. Preferably, the depth b ₁ of these cavities 220 is the same. If the mold 200 comprises a plurality of cavities 220, these cavities 220 may be arranged regularly or irregularly. Preferably, these cavities 220 are regularly arranged.

In the curing step of the abrasive, if the abrasive comprises a photoinitiator, the abrasive can preferably be cured by ultraviolet light. When the abrasive is cured using ultraviolet light, the intensity of the ultraviolet light is 500 to 700 watts / decimeter, preferably 600 watts / decimeter.

In the curing step of the abrasive, if the abrasive comprises a thermal radical initiator, the abrasive can preferably be cured by heating, and the heating temperature is preferably 50 to 120 占 폚.

Example

The examples and comparative examples provided below are intended to aid in understanding the present invention and should not be understood as limiting the scope of the invention. All parts and percentages are by weight unless otherwise specified.

The raw materials used in Examples and Comparative Examples of the present invention are as shown in Table 1 below.

[Table 1]

The abrasion resistance performance of the abrasive articles provided in the examples and comparative examples was mainly evaluated by the "shaper test" shown in Fig.

Shiffer Test Method

The abrasive article is cut into round disks (as shown in Fig. 1A), and the diameter of the disk is selected according to the purpose.

Prior to testing, the disks were applied to 3D detection using a digital microscope VHX-1000 E (commercially available from Keyence Corp.), and the thickness of the disk before testing was recorded.

3, a pressure-sensitive adhesive is applied to the back surface of the disk 330, and the disk 330 is attached to the flat tray 320. As shown in Fig. The tray 320 with the disc 330 attached was mounted on a shaper tester (commercially available from Frazier Precision Co., Gatorbagg, Maryland, USA).

(Polymethylmethacrylate) under wet polishing conditions using a continuous water jet (water flow rate 350 at 30 ml / min) at a test pressure of 4.54 kg and having an outer diameter of 102 mm and an outer diameter of 51 The ring 340 having an inner diameter of mm was polished by using the disk 330 at a total number of revolutions of 4,500. During the test, the rotation speed of the tray 320 was 250 rpm, the rotation speed of the PMMA ring 340 was 250 rpm, and the rotation direction of the PMMA ring 340 was the same as the rotation direction of the tray 320. The arrows in FIG. 3 indicate the rotational directions of the PMMA ring 340 and the tray 320, respectively. The rotation axis of the PMMA ring 340 was not on the same line as the rotation axis of the tray 320 and the distance between the rotation axis of the PMMA ring 340 and the rotation axis of the tray 320 was about 30 mm.

When the polishing is completed, the disk 330 is blow-dried.

After the test, the disc was applied to 3D detection using a digital microscope VHX-1000 E (commercially available from Kenskopf) and the thickness of the discs after the test was recorded. The actual wear rate of the abrasive article was calculated according to the following equation to evaluate the abrasion resistance of the abrasive article.

Actual wear = thickness of disc before abrasion - thickness of disc after abrasion

If the actual wear of the disk is less than 5 占 퐉, the disk has a relatively high abrasion resistance, and if the disk is used to clean the surface of the LCD panel, it will scratch the ITO layer on the surface of the LCD panel. If the actual wear of the disc is greater than 5 占 퐉, the disc (abrasive article) has a relatively low abrasion resistance, and if the disc is used to clean the surface of the LCD panel, it will not scratch the ITO layer on the surface of the LCD panel.

Test results of the abrasion resistance performance of the abrasive articles provided by the Examples and Comparative Examples of the present invention are listed in Table 4 below.

Examples 1 to 4 (Preparation of Adhesive Matrix)

Adhesive matrices were prepared by the following steps using the components listed in Table 2 and amounts thereof.

Step 1: The ingredients were added to a CA model # LA1A stirrer (commercially available from Cott Turbon Mixer Inc.).

Step 2: The components were mixed well by stirring at a temperature of 30 DEG C and a rotational speed of 400 rpm to obtain an adhesive matrix.

[Table 2]

Examples 5 to 13 and Comparative Examples C1 to C4

"Manufacture of abrasives":

The abrasives were prepared by the following steps using the components listed in Table 3 and their amounts.

An abrasive was obtained by uniformly dispersing abrasive particles in an adhesive matrix using a CA model # LA1A stirrer (commercially available from Court Turbomixer Inc.) at a temperature of less than 30 DEG C and a rotational speed of 400 rpm.

"Manufacture of abrasive articles":

The abrasives were uniformly applied on a PP (polypropylene) mold as shown in Figs. 2A and 2B. The PP mold was produced by a micro-replica technique, having a width of 200 mm, and having a rectangular mold cavity. The rectangular mold cavity includes a plurality of cavities of regular arrangement. The bottom surfaces of these cavities were parallel to the cross section of the cavity in the horizontal direction and had the same area as that of the cavity. The bottom area of these cavities was 1.69 mm 2 and the depth b ₁ was 300 μm.

According to the method provided in US5975987, a mold filled with an abrasive was applied on a PET film coated with an EAA (ethylene acrylic acid copolymer) elastic primer (alternatively, the abrasive filled mold was cut into a 12 inch wide 0.005 inches in thickness and can be applied on a woven backing coated with a polyurethane primer).

According to the method provided in US5975987, under the conditions of a clamp force of 90 lbs / ft (equivalent to approximately 620.5 mm) of the clamp roll and a moving speed of 10 ft / min of the PET film, (Ultraviolet light source equipment was EPIQ 6000, which is commercially available from Fusion System Corp., Gatherburg, MD, USA). ≪ RTI ID = 0.0 > ).

After curing the abrasive, the PP mold was removed from the PET film to produce a cured abraded article formed on the EAA coated PET film. The abrasive article had a width of 200 mm. The abrasive article had regularly arranged protruding members. The cross-sectional shapes of these projecting members in the horizontal direction were square (the side of the rectangle was 1.3 mm and the area was 1.69 mm 2). These protruding members had a height h ₁ of 300 ± 50 μm.

"Siffer test of abrasive article"

A layer of 3M PSA 300LSE pressure sensitive adhesive (commercially available from 3M Corp.) was applied on the back side of the abraded article.

The pressure sensitive adhesive coated abrasive article was cut into round discs (as shown in Figure < RTI ID = 0.0 > 1A) < / RTI >

The actual wear of the disc was measured according to the "Shiffer Test Method" provided in the "Shiffer Test" The results are listed in Table 3.

[Table 3]

From Comparative Examples C1 to C3, it can be seen that when the abrasive does not contain aluminum hydroxide abrasive grains, the abrasive article produced from the abrasive has an actual wear less than 5 m, which allows the abrasive article to have a relatively high abrasion resistance, Lt; RTI ID = 0.0 > ITO < / RTI > coating on the surface of the LCD panel.

From Comparative Example C4, the abrasive article produced from the abrasive article had an actual abrasion of less than 5 占 퐉 when the abrasive contained aluminum hydroxide abrasive particles but did not contain diacrylate, which has a relatively high abrasion resistance of the abrasive article, And possibly scratches the ITO coating on the surface of the LCD panel.

From Examples 5 to 13 it can be seen that when the abrasive contains aluminum hydroxide abrasive grains, diacrylates and triacrylates, the abrasive articles produced from the abrasive have an actual wear rate of greater than 5 [mu] m, It is recognized that it has a relatively low abrasion resistance, indicating that it will not scratch the ITO coating on the surface of the LCD panel.

Furthermore, it can be seen from Examples 10 and 12 that, when the abrasive grains of the abrasive contain aluminum hydroxide abrasive grains, a suitable amount (1 to 2 wt.%) Of calcium carbonate abrasive grains can be further added to the abrasive grains And that the abrasive article made from such an abrasive has an actual wear rate of greater than 5 [mu] m indicating that the abrasive article has a relatively low abrasion resistance and will not scratch the ITO coating on the surface of the LCD panel.

Further, it can be seen from Examples 9 and 11 that when the abrasive grains of the abrasive comprise aluminum hydroxide abrasive grains, a suitable amount (1 to 2 wt.%) Of aluminum oxide abrasive grains are further added to the abrasive grains It can be appreciated that the abrasive articles made from such abrasive materials have an actual wear rate of greater than 5 탆 which indicates that the abrasive article also has a relatively low abrasion resistance and will not scratch the ITO coating on the surface of the LCD panel have.

Although the specific details for carrying out the invention described above include many specific details for the purpose of illustration, it will be understood by those skilled in the art that many variations, changes, substitutions and alterations to these details are possible, ≪ / RTI > Therefore, the present disclosure set forth in the detailed description for carrying out the invention is disclosed without imposing any limitation on the content of the present disclosure claimed. The appropriate scope of this disclosure should be determined by the claims and their appropriate legal equivalents. All cited references are incorporated herein by reference in their entirety.

Claims (39)

An abrasive comprising abrasive particles and an adhesive matrix, wherein the abrasive particles are distributed in an adhesive matrix,
The abrasive particles comprise aluminum hydroxide abrasive grains,
The adhesive matrix comprises a triacrylate, a diacrylate, and an initiator. 2. The abrasive according to claim 1, wherein the aluminum hydroxide abrasive grains have an average particle size of 0.5 to 10 mu m. The abrasive according to claim 1, wherein the aluminum hydroxide abrasive particles are present in an amount of 15 to 30 wt.%, Based on the total weight of the abrasive as 100 wt.%. The abrasive according to claim 1, wherein the abrasive particles further comprise calcium carbonate abrasive grains. 5. The abrasive according to claim 4, wherein the calcium carbonate abrasive grains have an average particle size of 0.5 to 5 mu m. The abrasive according to claim 4, wherein the calcium carbonate abrasive particles are present in an amount of 0.5 to 5 wt.%, Based on the total weight of the abrasive as 100 wt.%. The abrasive according to claim 1, wherein the abrasive particles further comprise aluminum oxide abrasive grains. 8. The abrasive according to claim 7, wherein the aluminum oxide abrasive grains have an average particle size of 0.5 to 5 mu m. The abrasive according to claim 7, wherein the aluminum oxide abrasive particles are present in an amount of 0.5 to 2 wt.%, Based on the total weight of the abrasive as 100 wt.%. The abrasive according to claim 1, wherein the adhesive matrix is present in an amount of 60 to 85 wt.%, Based on the total weight of the abrasive as 100 wt.%. The abrasive according to claim 1, wherein the triacrylate has an average molecular weight of 150 to 500. The abrasive of claim 1, wherein the triacrylate is selected from one or more from the group consisting of isocyanurate-acrylate and trimethylolpropane triacrylate. The abrasive according to claim 1, wherein the triacrylate is present in an amount of 10 to 40 wt.%, Based on the total weight of the abrasive as 100 wt.%. The abrasive according to claim 1, wherein the diacrylate has an average molecular weight of 100 to 600. The abrasive of claim 1, wherein the diacrylate is selected from the group consisting of polyethylene glycol (200) diacrylate and oxyethylene bisphenol A diacrylate. The abrasive according to claim 1, wherein the diacrylate is present in an amount of 30 to 60 wt.%, Based on the total weight of the abrasive as 100 wt.%. The abrasive of claim 1 wherein the initiator is selected from one or more of the group consisting of photoinitiators and thermal radical initiators. The abrasive according to claim 1, wherein the initiator is present in an amount of 0.1 to 5 wt.%, Based on the total weight of the abrasive as 100 wt.%. The abrasive of claim 1, wherein the adhesive matrix further comprises at least one from the group consisting of a surfactant, a suspending agent, a coupling agent, and a dispersing agent. An abrasive article comprising a cured abrasive according to any one of claims 1 to 19. 21. The article of claim 20, comprising a protruding member or a plurality of projecting members. 23. The article of claim 21, wherein the cross-sectional shape of the projecting member in the horizontal direction comprises at least one of the group consisting of triangular, rectangular, rectangular, rhombic, pentagonal, hexagonal, circular, and elliptical. The article of claim 21, wherein the upper surface of the projecting member is parallel to the cross-section of the projecting member in the horizontal direction. 22. The article of claim 21, wherein the projecting member has a pyramid-like structure. The abrasive article of claim 21, wherein the projecting member has a height of 10 to 500 μm. 22. The article of claim 21, wherein the plurality of projecting members have the same height. 22. The article of claim 21, wherein the plurality of projecting members have a regular arrangement. 22. The article of claim 21, further comprising a backing layer on which the projecting members are disposed. 29. The article of claim 28, wherein the backing layer material comprises at least one of the group consisting of a polyethylene film, a polyester woven fabric, a blended woven fabric, a cotton woven fabric and a paper. 29. The article of claim 28, wherein a primer coating layer is included between the projecting member and the backing layer. 31. The article of claim 30, wherein the material for the primer coating layer comprises at least one of the group consisting of a polyurethane and an ethylene / acrylic acid copolymer. A method for manufacturing an abrasive article comprising the steps of: curing an abrasive according to any one of claims 1 to 19. The method according to claim 32, wherein the abrasive is cured by ultraviolet light. The method of claim 33, wherein the intensity of ultraviolet light is 500 to 700 watts / decimeter. 35. The method of claim 34, wherein the intensity of ultraviolet light is 600 watts / decimeter. 34. The method of claim 33, wherein the abrasive material is first placed on the backing layer prior to curing the abrasive material. 37. The method of claim 36, wherein the backing layer material comprises at least one of the group consisting of a polyethylene film, a polyester woven fabric, a blended woven fabric, a cotton woven fabric, and paper. 37. The method of claim 36, wherein the primer coating layer is first placed on the backing layer prior to placing the abrasive on the backing layer. 39. The method of claim 38, wherein the material for the primer coating layer comprises at least one of the group consisting of a polyurethane and an ethylene / acrylic acid copolymer.

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