Water-based polishing paste and preparation method thereof

Abstract

The invention discloses water-based polishing paste and a preparation method thereof, and relates to the technical field of polishing processes. The method comprises the following steps: by taking water as a solvent, adding a flocculating agent and polyvinyl alcohol to regulate and control the viscosity and surface tension of an aqueous solution, then adding polishing powder, an antioxidant and a surfactant into the solution, continuously stirring, and cooling after fully and uniformly stirring, thereby obtaining the water-based polishing paste. The method has the advantages of simple operation process and simple raw material ratio, is a green, non-toxic and harmless product, and is mainly used for polishing the surface and the interior of a metal pipe fitting and polishing the surface of glass.

Description

Technical Field

[0001] The invention relates to the technical field of polishing technology, and in particular to a water-based polishing paste and a preparation method thereof. Background Art

[0002] Polishing is a processing method that uses mechanical, chemical or electrochemical effects to reduce the surface roughness of the workpiece to obtain a bright and flat surface. Polishing is a surface treatment technology that uses abrasives and grinding tools to polish the surface of an object to make it smooth and bright. Polishing can remove blemishes, scratches and oxide layers on the surface of an object and improve its appearance quality and glossiness.

[0003] Polishing is commonly used in the processing and manufacturing of materials such as metal, glass, and plastic. It is also commonly used in the surface treatment of products such as automobiles, furniture, and jewelry to increase their beauty and value. Polishing can be done manually or with mechanical equipment. The specific polishing method and material selection will vary depending on the material and requirements.

[0004] Polishing paste is an abrasive containing multiple ingredients, which is used in the process of polishing objects. There are four types of polishing pastes: white polishing paste is suitable for fine polishing of any material, yellow polishing paste is used for rough polishing of metal or non-metal, green polishing paste is used for mirror polishing of any workpiece, and purple polishing paste is used for medium grinding of any metal and non-metal.

[0005] Polishing The commonly used polishing procedures are divided into: (1) Rough polishing: Generally, yellow polishing paste is used with cloth-bonded grinding wheel. It is the first polishing procedure. The purpose is to remove sand holes and burrs on the surface of the workpiece and play a certain lubricating role; (2) Medium polishing: Generally, purple polishing paste is used with hemp wheel. It is the second polishing procedure. The purpose is to level the surface of the workpiece and deeply remove the sand holes or sand marks remaining on the surface of the workpiece. (3) Fine polishing: Generally, green polishing paste or white polishing paste is used with pure cotton cloth wheel. It is the last polishing procedure. After polishing, the workpiece has a mirror or high-gloss effect. The difference is that the former has a green light and the latter has a white light.

[0006] CN 109778212 A A rust removal paste with polishing effect is prepared by mixing nonylphenol as an organic solvent, borosulfate rust remover, thickener and abrasive. The organic solvent used in the polishing paste is harmful to human body, and long-term contact may cause cancer, which is not good for human health.

[0007] CN 115466574 A A processing method of a two-component metal grinding and polishing paste, using one or two or a mixture of two or more of succinic acid, adipic acid, cyclohexane acid, other carboxylic acids, phosphoric acid, hydrochloric acid, sulfuric acid and boric acid as component B, which is easy to corrode the skin and hurt the human body in contact, and has certain danger. Summary of the invention

[0008] The present invention aims at the deficiencies in the prior art and provides an aqueous polishing paste and a preparation method thereof.

[0009] In order to achieve the above object, the present invention adopts the following technical solutions: A water-based polishing paste has the following formula by weight: 35-45 parts of water, 1-1.5 parts of flocculant, 0.8-1.3 parts of polyvinyl alcohol, 50-60 parts of polishing powder, 0.5-1.5 parts of antioxidant, and 0.5-1.5% of surfactant.

[0010] In a further preferred embodiment, the flocculant is a polyacrylamide flocculant, and the effective solid content is >90%, and the molecular weight is 6-22 million.

[0011] In a further preferred embodiment, the polyvinyl alcohol is a low-polymerization degree polyvinyl alcohol, PVA 17-88, PVA 17-92, and PVA 17-99 are produced by Hubei Qibajiu Chemical Co., Ltd., are in granular form, and have a polymerization degree of 1700.

[0012] In a further preferred embodiment, the polishing powder is any one or more of cerium oxide, zirconium oxide, aluminum oxide, and barium sulfate, and the average particle size of the polishing powder is 1 micron; The cerium oxide polishing powder is produced by Dalian Guomao Materials Technology Co., Ltd., model YM-50, lanthanum oxide content 30%-40%, cerium oxide content>60%, particle size 1-1.4 microns, color is milky white; model SR-900, cerium oxide content>95%, particle size 0.8-1.2 microns, color is milky white; model SH-655, lanthanum oxide content ≥30%, cerium oxide content ≥60%, particle size 1-1.4 microns, color is light pink; The zirconium oxide polishing powder is produced by Hangzhou Hengna New Materials Co., Ltd., model number is HN-R600F, the crystal form is monoclinic, purity> 99.9%, average particle size: 1 micron, color is white; The alumina polishing powder Xuancheng Jingrui New Materials Co., Ltd. has a crystal form of α-Al2O3, a purity of >99.99%, an average particle size of 1 micron, and a white color; The barium sulfate is produced by Shandong Zibo Boshan Copson New Materials Co., Ltd., model: acid-washed barium sulfate, mesh number: 5000 mesh, and color is white.

[0013] According to a further preferred embodiment, the antioxidant is water-based antioxidant 1005 produced by Suzhou Jixin Trading Co., Ltd., with properties of dispersible water-based emulsion, pH value of 7-9, particle size of 1 micron, and solid content of 56%-58%.

[0014] The surfactant is any one or more of decyldimethylammonium chloride (bromide), dioctyldimethylammonium chloride (bromide), and choline chloride; Decyl dimethyl ammonium chloride (bromide) is produced by Jiangsu Xinsu New Materials Co., Ltd., with a content of 99.9%; dioctyl dimethyl ammonium chloride (bromide) is produced by Guangzhou Hu'ao Chemical Co., Ltd., with a content of 99%, and the appearance is white powder; Choline chloride is produced by Shanghai Jizhi Biochemical Technology Co., Ltd. and has a content of 98%.

[0015] The preparation method of the aqueous polishing paste is as follows: Add 35-45 parts of water into a mixing bucket, heat it to 80-90°C using a heater, add 0.8-1.3 parts of polyvinyl alcohol while stirring, and cool it down to 35-50°C after the polyvinyl alcohol is completely dissolved; Then, 1-1.5 parts of flocculant are added while stirring, and after stirring for 10-20 minutes, 0.5-1.5 parts of antioxidant, 0.5-1.5 parts of surfactant and 50-60 parts of polishing powder are added in batches. After being fully stirred and evenly mixed, the mixture is cooled to obtain a water-based polishing paste.

[0016] Compared with the prior art, the present invention has the following advantages and excellent effects: (1) The present invention not only has a simple operation process but also a simple raw material ratio, and is a green, non-toxic and harmless product.

[0017] (2) The present invention has no residue on the workpiece surface during the polishing process, uses less amount of material, and has good light output.

[0018] (3) The present invention is mainly used in fine polishing process, and uses water as solvent, is environmentally friendly, odorless, and harmless to human body.

[0019] (4) This polishing paste overcomes the characteristics of traditional oily polishing pastes that use volatile organic solvents, which are harmful to the human body if exposed to them for a long time. It uses water as a green and environmentally friendly solvent, produces no odor, is harmless to the human body, and has good glossiness during the polishing and grinding process, requires less usage, and leaves no residue on the workpiece surface after use. DETAILED DESCRIPTION Example 1

[0020] The aqueous polishing paste described in this embodiment is composed of 36 parts of water, 1 part of flocculant polyacrylamide, 0.8 parts of polyvinyl alcohol PVA 17-88 or PVA 17-92, PVA17-99, 60 parts of cerium oxide polishing powder (YM-50), 1.2 parts of aqueous antioxidant 1005, and 1 part of surfactant cholechloride or alkali decyl dimethyl ammonium chloride (bromide) or dioctyl dimethyl ammonium chloride (bromide).

[0021] Specific preparation method: add 36 parts of water into a mixing barrel, heat it to 85°C with a heater, add 0.8 parts of polyvinyl alcohol PVA 17-88 or PVA 17-92, PVA17-99 while stirring, and cool to 35-50°C after polyvinyl alcohol PVA 17-88 or PVA17-92, PVA17-99 is completely dissolved. Then add 1 part of flocculant polyacrylamide while stirring, stir for 10-20 minutes, add 1.2 parts of water-based antioxidant 1005, 1 part of surfactant choline chloride or decyl dimethyl ammonium chloride (bromide), dioctyl dimethyl ammonium chloride (bromide) and 60 parts of cerium oxide polishing powder (YM-50) in batches, stir well and cool to obtain a water-based polishing paste. Example 2

[0022] The aqueous polishing paste described in this embodiment is composed of 40 parts of water, 1.1 parts of flocculant polyacrylamide, 0.9 parts of polyvinyl alcohol PVA 17-88 or PVA 17-92, PVA17-99, 56 parts of cerium oxide polishing powder (YM-50), 1 part of aqueous antioxidant 1005, and 1 part of surfactant choline chloride or alkali decyl dimethyl ammonium chloride (bromide) or dioctyl dimethyl ammonium chloride (bromide).

[0023] Specific preparation method: add 40 parts of water into a mixing barrel, heat it to 85°C with a heater, add 0.9 parts of polyvinyl alcohol PVA 17-88 or PVA 17-92, PVA17-99 while stirring, and cool to 35-50°C after polyvinyl alcohol PVA 17-88 or PVA17-92, PVA17-99 is completely dissolved. Then add 1.1 parts of flocculant polyacrylamide while stirring, stir for 10-20 minutes, add 1 part of water-based antioxidant 1005, 1 part of surfactant choline chloride or decyl dimethyl ammonium chloride (bromide), dioctyl dimethyl ammonium chloride (bromide) and 56 parts of cerium oxide polishing powder (YM-50) in batches, stir well and cool to obtain a water-based polishing paste. Example 3

[0024] The aqueous polishing paste described in this embodiment is composed of 43 parts of water, 1.3 parts of flocculant polyacrylamide, 1 part of polyvinyl alcohol PVA 17-88 or PVA 17-92, PVA17-99, 52 parts of cerium oxide polishing powder (YM-50), 1.2 parts of aqueous antioxidant 1005, and 1.5 parts of surfactant choline chloride or alkali decyl dimethyl ammonium chloride (bromide) and dioctyl dimethyl ammonium chloride (bromide).

[0025] Specific preparation method: add 43 parts of water into a mixing barrel, heat it to 85°C with a heater, add 1 part of polyvinyl alcohol PVA 17-88 or PVA 17-92, PVA17-99 while stirring, and cool to 35-50°C after polyvinyl alcohol PVA 17-88 or PVA17-92, PVA17-99 is completely dissolved. Then add 1.3 parts of flocculant polyacrylamide while stirring, stir for 10-20 minutes, add 1.2 parts of water-based antioxidant 1005, 1.5 parts of surfactant choline chloride or decyl dimethyl ammonium chloride (bromide), dioctyl dimethyl ammonium chloride (bromide) and 52 parts of cerium oxide polishing powder (YM-50) in batches, stir well and cool to obtain a water-based polishing paste. Example 4

[0026] The aqueous polishing paste described in this embodiment is composed of 36 parts of water, 1 part of flocculant polyacrylamide, 0.8 parts of polyvinyl alcohol PVA 17-88 or PVA 17-92, PVA17-99, 60 parts of zirconium oxide polishing powder (HN-R600F), 1.2 parts of aqueous antioxidant 1005, and 1 part of surfactant choline chloride or alkali decyl dimethyl ammonium chloride (bromide) or dioctyl dimethyl ammonium chloride (bromide).

[0027] Specific preparation method: add 36 parts of water into a mixing barrel, heat it to 85°C with a heater, add 0.8 parts of polyvinyl alcohol PVA 17-88 or PVA 17-92, PVA17-99 while stirring, and cool to 35-50°C after polyvinyl alcohol PVA 17-88 or PVA17-92, PVA17-99 is completely dissolved. Then add 1 part of flocculant polyacrylamide while stirring, stir for 10-20 minutes, add 1.2 parts of water-based antioxidant 1005, 1 part of surfactant choline chloride or decyl dimethyl ammonium chloride (bromide), dioctyl dimethyl ammonium chloride (bromide) and 60 parts of zirconium oxide polishing powder (HN-R600F) in batches, stir well and cool to obtain a water-based polishing paste. Example 5

[0028] The aqueous polishing paste described in this embodiment is composed of 45 parts of water, 1.1 parts of flocculant polyacrylamide, 0.9 parts of polyvinyl alcohol PVA 17-88 or PVA 17-92, PVA17-99, 51 parts of cerium oxide polishing powder (YM-50), 1 part of aqueous antioxidant 1005, and 1 part of surfactant choline chloride or alkali decyl dimethyl ammonium chloride (bromide) or dioctyl dimethyl ammonium chloride (bromide).

[0029] Specific preparation method: add 45 parts of water into a mixing barrel, heat it to 85°C with a heater, add 0.9 parts of polyvinyl alcohol PVA 17-88 or PVA 17-92, PVA17-99 while stirring, and cool to 35-50°C after polyvinyl alcohol PVA 17-88 or PVA17-92, PVA17-99 is completely dissolved. Then add 1.1 parts of flocculant polyacrylamide while stirring, stir for 10-20 minutes, add 1 part of water-based antioxidant 1005, 1 part of surfactant choline chloride or decyl dimethyl ammonium chloride (bromide), dioctyl dimethyl ammonium chloride (bromide) and 51 parts of cerium oxide polishing powder (YM-50) in batches, stir well and cool to obtain a water-based polishing paste.

[0030] Table 1. Test results of metal surface polishing of pipe fittings Dosage Glossiness Is there any residue? Example 1 <![CDATA[100g / m 2 ]]> 662 no Example 2 <![CDATA[100g / m 2 ]]> 685 no Example 3 <![CDATA[100g / m 2 ]]> 732 no Example 4 <![CDATA[100g / m 2 ]]> 693 no Example 5 <![CDATA[100g / m 2 ]]> 688 no

Claims

1. A water-based polishing paste, characterized in that: The formula is as follows by mass: 35-45 parts of water, 1-1.5 parts of flocculant, 0.8-1.3 parts of polyvinyl alcohol, 50-60 parts of polishing powder, 0.5-1.5 parts of antioxidant, and 0.5-1.5% surfactant.

2. The aqueous polishing paste according to claim 1, characterized in that: The flocculant is a polyacrylamide flocculant, and the effective solid content is greater than 90%, and the molecular weight is 6-22 million.

3. The aqueous polishing paste according to claim 1, characterized in that: The polyvinyl alcohol is a low-polymerization degree polyvinyl alcohol, PVA 17-88, PVA 17-92, PVA 17-99 are produced by Hubei Qibajiu Chemical Co., Ltd., in granular form, with a polymerization degree of 1700.

4. The aqueous polishing paste according to claim 1, characterized in that: The polishing powder is any one or more of cerium oxide, zirconium oxide, aluminum oxide, and barium sulfate, and the average particle size of the polishing powder is 1 micron; The cerium oxide polishing powder is produced by Dalian Guomao Materials Technology Co., Ltd., model YM-50, lanthanum oxide content 30%-40%, cerium oxide content>60%, particle size 1-1.4 microns, color is milky white; model SR-900, cerium oxide content>95%, particle size 0.8-1.2 microns, color is milky white; model SH-655, lanthanum oxide content ≥30%, cerium oxide content ≥60%, particle size 1-1.4 microns, color is light pink; The zirconium oxide polishing powder is produced by Hangzhou Hengna New Materials Co., Ltd., model HN-R600F, monoclinic crystal form, purity> 99.9%, average particle size: 1 micron, white color; The alumina polishing powder Xuancheng Jingrui New Materials Co., Ltd. has a crystal form of α-Al2O3, a purity of >99.99%, an average particle size of 1 micron, and a white color; The barium sulfate is produced by Shandong Zibo Boshan Copson New Materials Co., Ltd., model: acid-washed barium sulfate, mesh number: 5000 mesh, and color is white.

5. The aqueous polishing paste according to claim 1, characterized in that: The antioxidant is water-based antioxidant 1005 produced by Suzhou Jixin Trading Co., Ltd., with properties: dispersible water-based emulsion, pH value: 7-9, particle size: 1 micron, solid content: 56%-58%.

6. The aqueous polishing paste according to claim 1, characterized in that: The surfactant is any one or more of decyldimethylammonium chloride (bromide), dioctyldimethylammonium chloride (bromide), and choline chloride; The decyl dimethyl ammonium chloride (bromide) is produced by Jiangsu Xinsu New Materials Co., Ltd., with a content of 99.9%; The dioctyl dimethyl ammonium chloride (bromide) is produced by Guangzhou Huao Chemical Co., Ltd. and is a white powder with a content of 99%; The choline chloride is produced by Shanghai Jizhi Biochemical Technology Co., Ltd. and has a content of 98%.

7. The method for preparing the aqueous polishing paste according to any one of claims 1 to 6, characterized in that: The specific preparation method is as follows: Add 35-45 parts of water into a mixing bucket, heat it to 80-90°C using a heater, add 0.8-1.3 parts of polyvinyl alcohol while stirring, and cool it down to 35-50°C after the polyvinyl alcohol is completely dissolved; Then, 1-1.5 parts of flocculant are added while stirring, and after stirring for 10-20 minutes, 0.5-1.5 parts of antioxidant, 0.5-1.5 parts of surfactant and 50-60 parts of polishing powder are added in batches. After being fully stirred and evenly mixed, the mixture is cooled to obtain a water-based polishing paste.