JP2008255232A - Abrasive composition - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an abrasive composition preventing coating film swelling on a coated surface and capable of securing excellent handling property on a polisher, preventing polishing rubbish fixation, surely smoothing the coated surface and giving good luster. <P>SOLUTION: The abrasive composition comprises abrasive particles, a lubricant, an organic solvent, a surfactant, a thickener and water, wherein each component is compounded, based on 100 pts.wt. total of the abrasive composition, to be 1-30 pts.wt. abrasive particle, 1-10 pts.wt. lubricant, 1-9 pts.wt. organic solvent, <0.1 pt.wt. surfactant and 0.1-2.0 pts.wt. thickener. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an abrasive composition, and more particularly to an abrasive composition suitably used for buffing.

Conventionally, on a painted surface of an automobile body, a buff (polishing wheel) and a polisher (polishing machine) on which the buff is rotatably mounted are used, and an abrasive composition is interposed between the painted surface and the buff. It is known that polishing (buffing) is performed by rotating a buff with a polisher.
As such an abrasive composition, for example, abrasive particles 5-50 mass%, lubricating oil 1-10 mass%, organic solvent 10-60 mass%, surfactant 0.1-3.0 mass%, thickening An aqueous emulsified polishing composition containing 0.1 to 2.0% by mass of an agent and water has been proposed (see, for example, Patent Document 1).
JP 2006-56996 A

However, the aqueous emulsified polishing composition described in Patent Document 1 may cause the coating film on the painted surface to swell.
Moreover, in the aqueous | water-based emulsification polishing composition of patent document 1, in operation of a polisher, there exists a malfunction that the buff to rotate receives strong resistance and the handling property of a polisher falls.

Moreover, in the aqueous | water-based emulsification polishing composition of patent document 1, there exists a malfunction that polishing waste adheres to the coating surface after finishing.
The purpose of the present invention is to prevent the swelling of the coating film on the painted surface, while ensuring excellent handling properties in the polisher, and to prevent the sticking of abrasive debris, and to ensure that the painted surface is smooth, An object of the present invention is to provide an abrasive composition capable of imparting good gloss.

  In order to achieve the above object, the abrasive composition of the present invention is an abrasive composition containing abrasive particles, a lubricating oil, an organic solvent, a surfactant, a thickener and water, and the abrasive composition The blending ratio is 1 to 30 parts by weight of the abrasive particles, 1 to 10 parts by weight of the lubricating oil, 1 to 9 parts by weight of the organic solvent, and 100 parts by weight of the abrasive composition. The surfactant is less than 0.1 parts by weight, and the thickener is 0.1 to 2.0 parts by weight.

Moreover, in the abrasive | polishing agent composition of this invention, it is suitable that the boiling point of the said organic solvent is 200-300 degreeC.
In the abrasive composition of the present invention, it is preferable that the lubricating oil is at least one selected from glycerin, spindle oil, and castor oil.

The abrasive composition of the present invention can prevent the coating film from swelling on the painted surface.
Moreover, if the abrasive | polishing agent composition of this invention is used for the buffing by the polisher in a coating surface, the outstanding handleability in a polisher is securable. In addition, it is possible to reliably obtain a smooth painted surface and to impart a good gloss while preventing polishing dust from sticking.

The abrasive composition of the present invention contains abrasive particles, lubricating oil, organic solvent, surfactant, thickener and water.
Abrasive particles are hard particles, for example, inorganic particles such as alumina, silica, kaolin, cerium oxide, titania, zirconia, germania, manganese dioxide, iron oxide, tin oxide, such as silicon carbide, boron carbide, carbonized Organic particles such as tungsten, carbon black and diamond can be mentioned.

Of these, inorganic particles are preferable, and alumina and silica are more preferable.
These abrasive particles can be used alone or in combination.
The abrasive particles have a 50% average particle diameter of, for example, 0.1 to 50 μm, preferably 0.3 to 30 μm.

The mixing ratio of the abrasive particles is 1 to 30 parts by weight, preferably 5 to 25 parts by weight with respect to 100 parts by weight of the total amount of the abrasive composition. When the blending ratio of the abrasive particles exceeds the above range, the handleability of the polisher in buffing is lowered. On the other hand, if the mixing ratio of the abrasive particles is less than the above range, a smooth painted surface cannot be obtained.
Lubricating oils provide smoothness to buffing in buffing, and include, for example, synthetic oils such as glycerin, liquid paraffin, polybutene, α-olefin oligomers, alkylbenzenes, polyol esters, phosphate esters, silicone oils, etc. , Spindle oil, neutral oil, mineral oil such as bright stock, for example, castor oil, soybean oil, palm oil, linseed oil, cottonseed oil, rapeseed oil, rapeseed oil, olive oil and other vegetable oils such as beef tallow, squalane, lanolin Animal fats and oils such as

These lubricating oils can be used alone or in combination. The lubricating oil is preferably used in combination, more specifically, a combination of synthetic oil, mineral oil and vegetable oil, more preferably a combination of glycerin, spindle oil and castor oil.
The blending ratio of the lubricating oil is 1 to 10 parts by weight, preferably 2 to 7 parts by weight with respect to 100 parts by weight of the total amount of the abrasive composition.

When the blending ratio of the lubricating oil exceeds the above range, the handleability of the polisher decreases. On the other hand, if the blending ratio of the lubricating oil is less than the above range, lubricity in buffing and glossiness after buffing are lowered.
When the lubricating oil is used in combination of glycerin, spindle oil and castor, the blending ratio of each component is, for example, 25 to 150 parts by weight of spindle oil with respect to 100 parts by weight of glycerin, castor oil. Is, for example, 5 to 50 parts by weight.

  The organic solvent is for improving the diffusibility of the lubricating oil in buffing, for example, a saturated aliphatic hydrocarbon solvent such as normal paraffin (for example, nonane, decane, dodecane, etc.), isoparaffin, naphthene, for example, Examples include petroleum aliphatic solvents such as kerosene, solvent naphtha, and stocked solvent, and terpene solvents such as camphor oil, turpentine oil, and pine oil. Preferably, a saturated aliphatic hydrocarbon solvent is used.

The organic solvent can be used alone or in combination.
The boiling point of the organic solvent is, for example, 150 to 350 ° C, preferably 200 to 300 ° C. If the boiling point of the organic solvent exceeds the above range, the viscosity becomes excessively high and smooth buffing may not be possible. On the other hand, if the boiling point of the organic solvent is less than the above range, in the buffing using a polisher, the organic solvent volatilizes in a short time due to frictional heat due to the rotation of the buff, so that the handleability of the polisher may be reduced. is there. Further, buffs (buff eyes) may be conspicuous.

Moreover, when the organic solvent has a boiling range, the lower limit is, for example, 200 ° C. or more, and the upper limit is, for example, 300 ° C. or less.
The blending ratio of the organic solvent is 1 to 9 parts by weight, preferably 3 to 8 parts by weight with respect to 100 parts by weight of the total amount of the abrasive composition.
When the organic solvent exceeds the above range, the coating film on the painted surface may swell. Moreover, since the handleability in buffing is deteriorated and the abrasive particles excessively polish the coated surface, a smooth painted surface cannot be obtained. Furthermore, good gloss cannot be imparted, and furthermore, buffs (buff eyes) are conspicuous. On the other hand, when the organic solvent is less than the above-mentioned range, the abrasiveness is lowered, and polishing scratches (paper eyes) due to the abrasive paper in the water sharpening remain.

  Surfactants improve the dispersibility of abrasive particles in water and include, for example, sodium dodecylbenzenesulfonate, sodium lauryl sulfate, sodium polyoxyethylene alkyl ether sulfate, sodium polyoxyethylene alkyl phenyl ether sulfate, and the like. Examples of the anionic surfactant include nonionic surfactants such as polyoxyethylene alkyl ether, polyoxyethylene alkylphenyl ether, polyoxyethylene sorbitan fatty acid ester, and sucrose fatty acid ester. Preferably, an anionic surfactant is used.

Surfactants can be used alone or in combination.
The blending ratio of the surfactant is, for example, less than 0.1 part by weight, preferably 0.09 part by weight or less, usually 0.01 part by weight or more, with respect to 100 parts by weight of the total amount of the abrasive composition. .
When the blending ratio of the surfactant exceeds the above range, the coating film on the painted surface may swell. Moreover, the organic solvent is emulsified in water, and the handling property in buffing is lowered. Further, since the abrasive particles excessively polish the painted surface, a smooth painted surface cannot be obtained. Furthermore, good gloss cannot be imparted, and further, buff scratches (buff eyes) are conspicuous, and polishing scraps adhere to the painted surface.

  The thickener is for thickening the abrasive composition to prevent the abrasive composition from scattering due to the rotation of the buff during buffing and to improve the dispersion stability of the abrasive particles. As the thickener, for example, synthetic thickeners such as polyacrylic acid and sodium polyacrylate (for example, completely neutralized products, partially neutralized products, etc.), for example, cellulose-based thickeners such as carboxymethylcellulose and carboxyethylcellulose. Examples include thickeners (semi-synthetic thickeners) such as natural thickeners such as agar, carrageenan, xanthan gum and gum arabic. These thickeners can be used alone or in combination.

The thickener is preferably a synthetic thickener, and more preferably polyacrylic acid.
Examples of polyacrylic acid include associative alkali-soluble polyacrylic acid (acrylic polymer), and commercially available products can be used as such polyacrylic acid. Examples of commercially available polyacrylic acid include Primal TT-615, Primal TT-935, Primal TT-950, Primal RM-4, and Primal RM-5 (above, Rohm and Haas Japan Co., Ltd.). Is mentioned.

Moreover, when using polyacrylic acid as a thickener, polyacrylic acid and an alkali are used together. Examples of the alkali include inorganic alkalis such as sodium hydroxide and potassium hydroxide, and organic alkalis such as ammonia and triethanolamine. By adding an alkali, polyacrylic acid exhibits a thickening action.
The blending ratio of the thickener is 0.1 to 2.0 parts by weight, preferably 0.2 to 1.0 parts by weight with respect to 100 parts by weight of the total amount of the abrasive composition. When the blending ratio of the thickener exceeds the above range, the viscosity becomes excessively high, the handleability of the polisher is reduced, and a smooth painted surface cannot be obtained. (Paper eyes) remain, and furthermore, good gloss cannot be imparted. Further, buff scratches (buff eyes) are conspicuous, and polishing scraps adhere to the painted surface. On the other hand, if the blending ratio of the thickener is less than the above range, the abrasive composition is scattered in the buffing.

The mixing ratio of water is set so as to be the balance of abrasive particles, lubricating oil, organic solvent, surfactant and thickener in the abrasive composition.
And in order to prepare the abrasive | polishing agent composition of this invention, abrasive particle | grains, lubricating oil, an organic solvent, surfactant, a thickener, and water are mix | blended suitably with the above-mentioned mixture ratio.
In preparing the abrasive composition, the respective components (abrasive particles, lubricating oil, organic solvent, surfactant, thickener and water) are blended simultaneously or appropriately divided.

When the thickener is polyacrylic acid, an alkali is added simultaneously with blending of polyacrylic acid or before and after blending of polyacrylic acid.
The abrasive composition of the present invention is usually added to the abrasive composition within a range that does not impair the effects of the present invention, such as a rust inhibitor, an antiseptic, an antifreezing agent, a pigment, and a fragrance. Additives can be blended as appropriate.

Thereby, the abrasive | polishing agent composition of this invention can be prepared.
And the abrasive | polishing agent composition of this invention obtained in this way is used for the buffing of a coating surface, for example.
The painted surface is not particularly limited as long as the surface is smooth and gloss is required, and examples thereof include a painted surface of a metal plate, preferably a painted surface of a vehicle body such as an automobile. .

  To buff using the abrasive composition of the present invention, first, the abrasive composition is dropped onto the painted surface, and then the buff and the buff are attached to the painted surface using a polisher on which the buff is rotatably mounted. The buff is rotated while the abrasive composition is interposed therebetween and the polisher and the buff are pressed against the painted surface. Alternatively, the buff can be rotated by a polisher while impregnating the buff with the abrasive composition in advance and pressing the buff against the painted surface.

As the buff, for example, a sponge buff, a wool buff, a cloth buff or the like is used. The polisher is capable of rotatably mounting the buff and is not particularly limited, and a known polisher is used.
The conditions for buffing are shown below.
Amount of abrasive composition used 3-12 g / m ² (area of painted surface)
Buff peripheral speed 565 to 1700m / min
Buff rotation speed 1000 ~ 3000min ^-1 (rpm)
Buff diameter 15-20cm
Buff pressing load 150-300kg / m ²
And the abrasive | polishing agent composition of this invention can prevent the swelling of the coating film in a coating surface.

  Moreover, the outstanding handling property in a polisher is securable by using the abrasive | polishing agent composition of this invention for the buffing by the polisher in a coating surface. In addition, it is possible to reliably obtain a smooth painted surface and to impart a good gloss while preventing polishing dust from sticking.

EXAMPLES Hereinafter, the present invention will be described more specifically with reference to examples and comparative examples. However, the present invention is not limited to these examples and comparative examples.
Example 1
(Abrasive composition formulation)
・ Abrasive particles 10g
(Alumina powder, 50% average particle size 1 μm, trade name: A-32, manufactured by Nippon Light Metal Co., Ltd.)
・ Lubricant (glycerin) 2g
・ Lubricating oil (spindle oil, manufactured by Nippon Oil Corporation) 1.2g
・ Lubricating oil (castor oil) 0.3g
・ Organic solvent 8g
(Isoparaffin, IP solvent 2028,
Boiling range: 205-260 ° C, manufactured by Idemitsu Petrochemical Co., Ltd.)
・ Surfactant 0.4g
(20% sodium dodecylbenzenesulfonate aqueous solution, trade name: Neogen S-20, manufactured by Daiichi Kogyo Seiyaku Co., Ltd.)
・ Thickener 1g
(Association type alkali-soluble acrylic polymer product name: Primal TT-615 (solid content 30%)
Rohm and Haas Japan Co., Ltd.)
・ Water 76.6g
・ Alkali (10% sodium hydroxide aqueous solution) 0.5g
Each component was mix | blended with the above mixing | blending prescription, and the abrasive | polishing agent composition was prepared.

  More specifically, first, water, a surfactant, a thickener, and a lubricating oil (glycerin) were blended and dispersed uniformly. Next, abrasive particles, an organic solvent, a lubricating oil (spindle oil), and a lubricating oil (castor oil) were further blended and dispersed uniformly to prepare a dispersion of abrasive particles. Thereafter, 0.5 g of alkali (10% aqueous sodium hydroxide solution) was added thereto, and the dispersion was thickened to prepare 100 g of an abrasive composition.

Example 2
As abrasive particles, instead of 10 g of alumina powder (50% average particle diameter 1 μm, trade name: A-32, manufactured by Nippon Light Metal Co., Ltd.), silica powder (50% average particle diameter 2 μm, trade name: Ceratom MN-23) Except for using 10 g of Eagle Pitcher Co., Ltd., a dispersion was prepared in the same manner as in Example 1, and then 100 g of an abrasive composition was prepared.

Example 3
As an organic solvent, isoparaffin (IP solvent 1620, boiling range 166-208 ° C., Idemitsu Petrochemical Co., Ltd.) instead of 8 g of isoparaffin (IP solvent 2028, boiling range 205-260 ° C., manufactured by Idemitsu Petrochemical Co., Ltd.) (Manufactured) A dispersion was prepared in the same manner as in Example 1 except that 8 g was used. Subsequently, 100 g of an abrasive composition was prepared.

Example 4
As the lubricating oil, except that 1.2 g of liquid paraffin (manufactured by Sanko Chemical Co., Ltd.) was used instead of 1.2 g of spindle oil (trade name: Super Oil M10, Shin Nippon Oil Co., Ltd.) A dispersion was prepared in the same manner as in Example 1, and then 100 g of an abrasive composition was prepared.
Comparative Example 1
(Abrasive composition formulation)
・ Abrasive particles (alumina powder) 20g
(50% average particle size 35 μm (trade name: A-26 (manufactured by Sumitomo Chemical Co., Ltd.) with coarse particles of 100 μm or more removed with a sieve)
・ Lubricant (glycerin) 2g
・ Lubricant (castor oil) 2g
・ Lubricant (liquid paraffin, Crompton Co., Ltd.) 2g
・ Organic solvent 20g
(Stoddard solvent, brand name: New Solvent F
Boiling range: 154-195 ° C, manufactured by Mitsubishi Corporation
・ Surfactant 1g
(Polyoxyethylene sorbitan monooleate, trade name: Rheodor TW-0120, manufactured by Kao Corporation)
・ Surfactant 0.5g
(Polyoxyethylene sorbitan monooleate, trade name: Rheodor TW-0106, manufactured by Kao Corporation)
・ Thickener 2g
(Association type alkali-soluble acrylic polymer product name: Primal RM-5 (solid content 30%)
Rohm and Haas Japan Co., Ltd.)
・ Water 50g
・ Alkali (triethanolamine) 0.5g
Each component was mix | blended with the above-mentioned mixing | blending prescription, and the abrasive | polishing agent composition was prepared.

More specifically, first, water, a thickener, a lubricating oil (glycerin), a surfactant (Leodol TW-0120) is blended and mixed uniformly, and further, abrasive particles are added thereto, These were uniformly dispersed to prepare a dispersion of abrasive particles.
In addition, lubricating oil (liquid paraffin), lubricating oil (castor oil), and surfactant (Rheidol TW-0106) were blended in the organic solvent, and these were uniformly mixed. This was added to the dispersion of abrasive particles, and these were uniformly stirred and emulsified to prepare an emulsion. Thereafter, 100 g of an abrasive composition was prepared by adding alkali (triethanolamine) to the emulsion to increase the viscosity of the emulsion.

Comparative Example 2
The same as Example 1 except that 64.6 g of water was used instead of 76.6 g of water, and 20 g of organic solvent (isoparaffin, IP solvent 2028) was used instead of 8 g of organic solvent (isoparaffin, IP solvent 2028). Then, a dispersion liquid was prepared, and then 100 g of an abrasive composition was prepared.

Comparative Example 3
Instead of water 76.6 g, water 72 g was used, and surfactant (20% sodium dodecylbenzenesulfonate aqueous solution) 0.4 g was used instead of surfactant (20% sodium dodecylbenzenesulfonate aqueous solution) 5 g. Except for this, a dispersion was prepared in the same manner as in Example 1, and then 100 g of an abrasive composition was prepared.

(Evaluation)
1. Effect of Abrasive Composition on Paint Surface The abrasive compositions of each Example and each Comparative Example were spot-dropped onto an acrylic melamine coating film and then allowed to stand at 50 ° C. for 4 hours. Thereafter, this was washed with water, and the appearance of the trace of the abrasive composition was visually observed to evaluate the influence of the abrasive composition on the painted surface. The results are shown in Table 1. In addition, the symbol in Table 1 is shown below.

○: No abnormality is observed in the coating film. Δ: The coating film slightly swells. X: The coating film swells. Evaluation of Buffing of Abrasive Composition The painted surface of the trunk portion (coating color: black) of ordinary passenger cars was water-polished using water-resistant abrasive paper (# 2000, Sankyo Rika Chemical Co., Ltd.).

Then, it buffed and finished on the following grinding | polishing conditions using the abrasive | polishing agent composition of each Example and each comparative example.
(Conditions for buffing)
Work area of painted surface 60cm x 60cm
Amount of abrasive composition used 3 g (8.33 g / m ² (working area of the painted surface))
Polisher Electric polisher
(Model number: Ryobi PE-2100)
Buff sponge buff
(Diameter 18cm, manufactured by Dazai Buff Factory)
Buff rotation speed 1500min ^-1 (rpm)
Buff peripheral speed 848m / min
Buff pressure load 5kg (197kg / m ² )
In this buffing, the abrasive composition was evaluated for the following items.
2) Polisher handleability The polisher handleability in buffing was evaluated by a relative comparison using the operator. The results are shown in Table 1. In addition, the symbol in Table 1 is shown below.

○: No resistance felt during buff rotation △: Small resistance felt during buff rotation ×: High resistance felt during buff rotation 3) Paper (abrasive paper) eye removal performance Paper eye (in water sharpening) It was visually observed whether or not (polishing scratches due to abrasive paper) were removed. The results are shown in Table 1. In addition, the symbol in Table 1 is shown below.

○: Paper eyes disappear completely △: Paper eyes almost disappear ×: Paper eyes remain 4) Adhering of abrasive debris to the painted surface after finishing Visually confirm that abrasive debris is adhered to the painted surface after finishing Observed. The results are shown in Table 1. In addition, the symbol in Table 1 is shown below.

○: Adherence is not observed ×: Adhesion is observed 5) State of the surface (buff eyes) of the painted surface after finishing After finishing, buff scratches (buff eyes) on the painted surface were visually observed. The results are shown in Table 1. In addition, the symbol in Table 1 is shown below.

◎: No buffing eyes ○: Buffing eyes are scarce △: Buffing eyes are slightly conspicuous ×: Buffing eyes are conspicuous 6) Gloss of painted surface after finishing 60 ° Specular gloss was measured. The results are shown in Table 1. In addition, the symbol in Table 1 is shown below.

◎: 90 or more ○: 85 or more and less than 90 Δ: 75 or more and less than 85 ×: less than 75

なお、表１中の配合処方における数値は、重量（グラム数）を示す。

In addition, the numerical value in the mixing | blending prescription in Table 1 shows a weight (gram number).

Claims (3)

An abrasive composition comprising abrasive particles, lubricating oil, organic solvent, surfactant, thickener and water,
The blending ratio of the abrasive composition is 1 to 30 parts by weight of the abrasive particles, 1 to 10 parts by weight of the lubricating oil, and 1 to 10 parts by weight of the organic solvent with respect to 100 parts by weight of the total amount of the abrasive composition. An abrasive composition, wherein 9 parts by weight, the surfactant is less than 0.1 parts by weight, and the thickener is 0.1 to 2.0 parts by weight.   The abrasive composition according to claim 1, wherein the organic solvent has a boiling point of 200 to 300 ° C.   The abrasive composition according to claim 1 or 2, wherein the lubricating oil is at least one selected from glycerin, spindle oil, and castor oil.