A scratch-resistant mirror KPU treatment agent and preparation method thereof

Abstract

The present invention discloses a scratch-resistant mirror KPU treatment agent and a preparation method thereof, belonging to the technical field of KPU treatment agent preparation, comprising the following steps: calcining and activating white corundum to obtain activated powder; preparing an inorganic-organic modifier: a white corundum / β-cyclodextrin / tetrahydrocurcumin modifier; stirring and reacting a polyether polyol PTMG, a tung oil-based glycol, and an isophorone diisocyanate, then adding the white corundum / β-cyclodextrin / tetrahydrocurcumin modifier and stirring and reacting, and finally adding 4,4'-methylenebiscyclohexylamine for a chain extension reaction to obtain the scratch-resistant mirror KPU treatment agent. The present invention achieves a low viscosity at an initial 0-0.5h, rapidly increases viscosity at 0.5h-2h, and substantially exerts high viscosity characteristics within 2h, thereby improving production efficiency; at the same time, the product can ensure good scratch resistance under normal temperature and low temperature environments.

Description

Technical Field

[0001] The present invention relates to the technical field of KPU treatment agent preparation, and in particular to a scratch-resistant mirror surface KPU treatment agent and a preparation method thereof. Background Art

[0002] Polyurethane elastomer (KPU) is widely used in shoe upper treatments. Applying KPU to shoe upper leather effectively enhances the visual appearance and mechanical strength of the shoe upper.

[0003] Chinese invention patent CN109267352B discloses a high-solids, low-viscosity mirror-finish synthetic leather treatment agent and its preparation method. The agent boasts a solids content of up to 80%. Initially, the agent has a low viscosity, facilitating operation and improving its utilization. Over time, the viscosity increases significantly to meet practical production and living needs. However, the viscosity of the agent increases exponentially every hour, requiring a long wait for its high viscosity to fully develop, which can negatively impact production efficiency.

[0004] Chinese invention patent CN109898342B discloses a method for preparing scratch-resistant synthetic leather based on high-rebound waterborne polyurethane. The method achieves good scratch resistance through high rebound. However, at low temperatures, the rebound resilience is significantly reduced, and the scratch resistance is significantly affected by low temperatures.

[0005] Based on this, the present invention designs a scratch-resistant mirror KPU treating agent and a preparation method thereof to solve the above problems. Summary of the Invention

[0006] In view of the above-mentioned shortcomings of the prior art, the present invention provides a scratch-resistant mirror KPU treating agent and a preparation method thereof.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] A method for preparing a scratch-resistant mirror KPU treatment agent comprises the following steps:

[0009] 1. Weigh the following raw materials by weight: 65-73 parts of polyether polyol PTMG, 18-25 parts of tung oil-based glycol, 85-104 parts of isophorone diisocyanate, 13-18 parts of tetrahydrocurcumin, 6.3-10.7 parts of β-cyclodextrin, 10.8-12.4 parts of white corundum powder, and 5-8.6 parts of 4,4'-methylenebiscyclohexylamine;

[0010] 2. Calcination and activation treatment of white corundum

[0011] 2.1. Mix white corundum powder and β-cyclodextrin evenly, calcine and activate them, and then grind them;

[0012] 2.2. Disperse the powder in anhydrous ethanol, add deionized water and ammonia water, and stir at high speed;

[0013] 2.3. Filter, wash and dry to obtain activated powder;

[0014] 3. Preparation of Inorganic-Organic Modifiers

[0015] Adding activated powder and tetrahydrocurcumin into anhydrous ethanol, stirring and reacting to obtain a white corundum / β-cyclodextrin / tetrahydrocurcumin modifier;

[0016] 4. The polyether polyol PTMG, tung oil-based diol and isophorone diisocyanate were stirred and reacted, and then white corundum / β-cyclodextrin / tetrahydrocurcumin modifier was added and stirred and reacted. Finally, 4,4'-methylenebiscyclohexylamine was added for chain extension reaction to obtain a scratch-resistant mirror KPU treatment agent.

[0017] Furthermore, in step 2.1, white corundum powder and β-cyclodextrin are mixed evenly, calcined and activated at 250-280° C. for 1-2 hours, taken out, ground and sieved with 400-500 mesh.

[0018] Furthermore, in step 2.2, the powder is dispersed in 3 to 4 times the weight of anhydrous ethanol, deionized water and ammonia water are added, and high-speed stirring is performed at 1800 to 2200 r / min for 15 to 25 minutes.

[0019] Furthermore, in step 2.2, the weight ratio of anhydrous ethanol, deionized water, and aqueous ammonia is 3-4:1-1.2:1.5-2.

[0020] Furthermore, the sample was washed with anhydrous ethanol in step 2.3.

[0021] Furthermore, in step 3, the activated powder and tetrahydrocurcumin are added to anhydrous ethanol, and the mixture is stirred at 108.3-125.6° C. for 3-5 hours to obtain a white corundum / β-cyclodextrin / tetrahydrocurcumin modifier.

[0022] Furthermore, in step 4, polyether polyol PTMG, tung oil-based glycol and isophorone diisocyanate are mixed, placed at 85-95° C. and stirred for reaction for 35-65 minutes, cooled to 75-80° C., white corundum / β-cyclodextrin / tetrahydrocurcumin modifier is added, stirred for reaction for 20-30 minutes, and finally 4,4'-methylenebiscyclohexylamine is added for chain extension reaction for 1-3 hours to obtain a scratch-resistant mirror KPU treatment agent.

[0023] In order to better achieve the purpose of the present invention, the present invention also provides a scratch-resistant mirror KPU treatment agent prepared according to the above method.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The present invention involves reacting polyether polyol PTMG, tung oil-based diol, and isophorone diisocyanate to first increase the product's relative molecular weight and form a main chain structure. A white corundum / β-cyclodextrin / tetrahydrocurcumin modifier is then added to modify the main chain, followed by a chain extension reaction. This stabilizes the relative molecular weight of the KPU treatment agent, thereby ensuring the stability of the crystal structure (white corundum) in the KPU treatment agent and preventing crystal particle dropout, thereby ensuring scratch resistance. Furthermore, the coating film is bright and aesthetically pleasing.

[0026] The present invention forms a white corundum / β-cyclodextrin / tetrahydrocurcumin modifier by calcining and activating white corundum and adding tetrahydrocurcumin. The viscosity can be kept at a low level in the initial 0-0.5 hour, the viscosity increases rapidly in 0.5 hour to 2 hours, and the viscosity increases slowly in 2-3 hours. The high viscosity characteristic can be basically exerted within 2 hours, which is conducive to improving production efficiency. At the same time, the product can ensure good scratch resistance under both normal temperature and low temperature environments, thereby expanding the application range of the product. DETAILED DESCRIPTION

[0027] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] Example 1 Preparation of scratch-resistant mirror KPU treating agent:

[0029] 1. Weigh the following raw materials according to the formula: polyether polyol PTMG, tung oil-based glycol, isophorone diisocyanate, tetrahydrocurcumin, β-cyclodextrin, white corundum powder, 4,4'-methylenebiscyclohexylamine;

[0030] 2. Calcination and activation treatment of white corundum

[0031] 2.1. Mix white corundum powder and β-cyclodextrin evenly, calcine and activate them, and then grind them;

[0032] 2.2. Disperse the powder in anhydrous ethanol, add deionized water and ammonia water, and stir at high speed;

[0033] 2.3. Filter, wash and dry to obtain activated powder;

[0034] 3. Preparation of Inorganic-Organic Modifiers

[0035] Adding activated powder and tetrahydrocurcumin into anhydrous ethanol, stirring and reacting to obtain a white corundum / β-cyclodextrin / tetrahydrocurcumin modifier;

[0036] 4. The polyether polyol PTMG, tung oil-based diol and isophorone diisocyanate were stirred and reacted, and then white corundum / β-cyclodextrin / tetrahydrocurcumin modifier was added and stirred and reacted. Finally, 4,4'-methylenebiscyclohexylamine was added for chain extension reaction to obtain a scratch-resistant mirror KPU treatment agent.

[0037] Specifically, 65 parts of polyether polyol PTMG, 25 parts of tung oil-based glycol, 85 parts of isophorone diisocyanate, 18 parts of tetrahydrocurcumin (C 21 H 24 O6), 6.3 parts of β-cyclodextrin (β-CD), 12.4 parts of white corundum powder, 5 parts of 4,4'-methylenebiscyclohexylamine (chain extender), set aside; take the white corundum powder and β-cyclodextrin and mix them evenly, place them at 280℃ for calcination and activation for 1h, take them out and grind them through a 500 mesh sieve; disperse the powder in 3 times the weight of anhydrous ethanol, add deionized water and ammonia water, and stir at a high speed of 2200r / min for 15min; the weight ratio of anhydrous ethanol, deionized water and ammonia water is 4:1:2; filter, wash with anhydrous ethanol and dry to obtain activated powder Finally, the activated powder and tetrahydrocurcumin were added to anhydrous ethanol, and the mixture was stirred at 108.3°C for 5 hours to obtain a white corundum / β-cyclodextrin / tetrahydrocurcumin modifier; Fourth, polyether polyol PTMG, tung oil-based glycol and isophorone diisocyanate were mixed, and the mixture was stirred at 85°C for 65 minutes, and the temperature was lowered to 75°C, and the white corundum / β-cyclodextrin / tetrahydrocurcumin modifier was added, and the mixture was stirred for 30 minutes. Finally, 4,4'-methylenebiscyclohexylamine was added to carry out a chain extension reaction for 1 hour to obtain a scratch-resistant mirror KPU treatment agent.

[0038] Example 2 Preparation of scratch-resistant mirror KPU treatment agent:

[0039] 1. Weigh the following raw materials according to the formula: polyether polyol PTMG, tung oil-based glycol, isophorone diisocyanate, tetrahydrocurcumin, β-cyclodextrin, white corundum powder, 4,4'-methylenebiscyclohexylamine;

[0040] 2. Calcination and activation treatment of white corundum

[0041] 2.1. Mix white corundum powder and β-cyclodextrin evenly, calcine and activate them, and then grind them;

[0042] 2.2. Disperse the powder in anhydrous ethanol, add deionized water and ammonia water, and stir at high speed;

[0043] 2.3. Filter, wash and dry to obtain activated powder;

[0044] 3. Preparation of Inorganic-Organic Modifiers

[0045] Adding activated powder and tetrahydrocurcumin into anhydrous ethanol, stirring and reacting to obtain a white corundum / β-cyclodextrin / tetrahydrocurcumin modifier;

[0046] 4. The polyether polyol PTMG, tung oil-based diol and isophorone diisocyanate were stirred and reacted, and then white corundum / β-cyclodextrin / tetrahydrocurcumin modifier was added and stirred and reacted. Finally, 4,4'-methylenebiscyclohexylamine was added for chain extension reaction to obtain a scratch-resistant mirror KPU treatment agent.

[0047] Specifically, 73 parts of polyether polyol PTMG, 18 parts of tung oil-based glycol, 104 parts of isophorone diisocyanate, 13 parts of tetrahydrocurcumin (C 21 H 24 O6), 10.7 parts of β-cyclodextrin (β-CD), 10.8 parts of white corundum powder, 8.6 parts of 4,4'-methylenebiscyclohexylamine (chain extender), set aside; take the white corundum powder and β-cyclodextrin and mix them evenly, place them at 250℃ for calcination activation for 2h, take them out and grind them through a 400 mesh sieve; disperse the powder in 4 times the weight of anhydrous ethanol, add deionized water and ammonia water, and stir at a high speed of 1800r / min for 25min; the weight ratio of anhydrous ethanol, deionized water and ammonia water is 3:1.2:1.5; filter, wash with anhydrous ethanol and dry. The activated powder was obtained; the activated powder and tetrahydrocurcumin were added to anhydrous ethanol, and the mixture was stirred at 125.6°C for 3 hours to obtain a white corundum / β-cyclodextrin / tetrahydrocurcumin modifier; 4. The polyether polyol PTMG, tung oil-based glycol and isophorone diisocyanate were mixed, stirred at 95°C for 35 minutes, cooled to 80°C, white corundum / β-cyclodextrin / tetrahydrocurcumin modifier was added, stirred for 20 minutes, and finally 4,4'-methylenebiscyclohexylamine was added for chain extension reaction for 3 hours to obtain a scratch-resistant mirror KPU treatment agent.

[0048] Example 3 Preparation of Scratch-Resistant Mirror KPU Treatment Agent:

[0049] 1. Weigh the following raw materials according to the formula: polyether polyol PTMG, tung oil-based glycol, isophorone diisocyanate, tetrahydrocurcumin, β-cyclodextrin, white corundum powder, 4,4'-methylenebiscyclohexylamine;

[0050] 2. Calcination and activation treatment of white corundum

[0051] 2.1. Mix white corundum powder and β-cyclodextrin evenly, calcine and activate them, and then grind them;

[0052] 2.2. Disperse the powder in anhydrous ethanol, add deionized water and ammonia water, and stir at high speed;

[0053] 2.3. Filter, wash and dry to obtain activated powder;

[0054] 3. Preparation of Inorganic-Organic Modifiers

[0055] Adding activated powder and tetrahydrocurcumin into anhydrous ethanol, stirring and reacting to obtain a white corundum / β-cyclodextrin / tetrahydrocurcumin modifier;

[0056] 4. The polyether polyol PTMG, tung oil-based diol and isophorone diisocyanate were stirred and reacted, and then white corundum / β-cyclodextrin / tetrahydrocurcumin modifier was added and stirred and reacted. Finally, 4,4'-methylenebiscyclohexylamine was added for chain extension reaction to obtain a scratch-resistant mirror KPU treatment agent.

[0057] Specifically, 68 parts of polyether polyol PTMG, 22 parts of tung oil-based glycol, 90 parts of isophorone diisocyanate, 15 parts of tetrahydrocurcumin (C 21 H 24 O6), 8.7 parts of β-cyclodextrin (β-CD), 11.3 parts of white corundum powder, 7 parts of 4,4'-methylenebiscyclohexylamine (chain extender), set aside; take the white corundum powder and β-cyclodextrin and mix them evenly, place them at 270℃ for calcination activation for 1.3h, take them out and grind them through a 460 mesh sieve; disperse the powder in 3.2 times the weight of anhydrous ethanol, add deionized water and ammonia water, and stir at a high speed of 2000r / min for 18min; the weight ratio of anhydrous ethanol, deionized water and ammonia water is 3.2:1.1:1.8; filter, wash with anhydrous ethanol and dry, and obtain Activate the powder; add the activated powder and tetrahydrocurcumin to anhydrous ethanol, place it at 115.6°C and stir to react for 4.5 hours to obtain white corundum / β-cyclodextrin / tetrahydrocurcumin modifier; Fourth, mix the polyether polyol PTMG, tung oil-based diol and isophorone diisocyanate, place it at 88°C and stir to react for 45 minutes, cool it to 78°C, add white corundum / β-cyclodextrin / tetrahydrocurcumin modifier, stir to react for 25 minutes, and finally add 4,4'-methylenebiscyclohexylamine to carry out chain extension reaction for 1.6 hours to obtain a scratch-resistant mirror KPU treatment agent.

[0058] Comparative Example 1 Preparation of mirror KPU treating agent:

[0059] The difference from Example 3 lies in the calcination activation treatment process of white corundum: white corundum powder and β-cyclodextrin are mixed evenly, ground and sieved through 460 mesh to obtain activated powder.

[0060] 1. Weigh the following raw materials according to the formula: polyether polyol PTMG, tung oil-based glycol, isophorone diisocyanate, tetrahydrocurcumin, β-cyclodextrin, white corundum powder, 4,4'-methylenebiscyclohexylamine;

[0061] 2. Calcination and activation treatment of white corundum

[0062] Mix white corundum powder and β-cyclodextrin evenly, grind and sieve through 460 mesh to obtain activated powder;

[0063] 3. Preparation of Inorganic-Organic Modifiers

[0064] Adding activated powder and tetrahydrocurcumin into anhydrous ethanol, stirring and reacting to obtain a white corundum / β-cyclodextrin / tetrahydrocurcumin modifier;

[0065] 4. The polyether polyol PTMG, tung oil-based diol and isophorone diisocyanate were stirred and reacted, and then white corundum / β-cyclodextrin / tetrahydrocurcumin modifier was added and stirred and reacted. Finally, 4,4'-methylenebiscyclohexylamine was added for chain extension reaction to obtain a scratch-resistant mirror KPU treatment agent.

[0066] Specifically, 68 parts of polyether polyol PTMG, 22 parts of tung oil-based glycol, 90 parts of isophorone diisocyanate, 15 parts of tetrahydrocurcumin (C 21 H 24 O6), 8.7 parts of β-cyclodextrin (β-CD), 11.3 parts of white corundum powder, 7 parts of 4,4'-methylenebiscyclohexylamine (chain extender), set aside; take white corundum powder and β-cyclodextrin, mix them evenly, grind and sieve 460 mesh to obtain activated powder; add the activated powder and tetrahydrocurcumin to anhydrous ethanol, place it at 115.6°C and stir to react for 4.5h to obtain white corundum / β-cyclodextrin / tetrahydrocurcumin modifier; Fourth, mix polyether polyol PTMG, tung oil-based diol and isophorone diisocyanate, place it at 88°C and stir to react for 45min, cool to 78°C, add white corundum / β-cyclodextrin / tetrahydrocurcumin modifier, stir to react for 25min, and finally add 4,4'-methylenebiscyclohexylamine to carry out chain extension reaction for 1.6h to obtain a scratch-resistant mirror KPU treatment agent.

[0067] Comparative Example 2 Preparation of mirror KPU treating agent:

[0068] The difference from Example 3 is that tetrahydrocurcumin is not added to the raw materials.

[0069] 1. Weigh the following raw materials according to the formula: polyether polyol PTMG, tung oil-based glycol, isophorone diisocyanate, β-cyclodextrin, white corundum powder, 4,4'-methylenebiscyclohexylamine;

[0070] 2. Calcination and activation treatment of white corundum

[0071] 2.1. Mix white corundum powder and β-cyclodextrin evenly, calcine and activate them, and then grind them;

[0072] 2.2. Disperse the powder in anhydrous ethanol, add deionized water and ammonia water, and stir at high speed;

[0073] 2.3. Filter, wash and dry to obtain activated powder;

[0074] 3. Preparation of Inorganic-Organic Modifiers

[0075] Add the activated powder into anhydrous ethanol and stir to react to obtain a white corundum / β-cyclodextrin modifier;

[0076] 4. The polyether polyol PTMG, tung oil-based diol and isophorone diisocyanate are stirred and reacted, and then white corundum / β-cyclodextrin modifier is added and stirred and reacted. Finally, 4,4'-methylenebiscyclohexylamine is added to carry out a chain extension reaction to obtain a scratch-resistant mirror KPU treatment agent.

[0077] Specifically, 68 parts of polyether polyol PTMG, 22 parts of tung oil-based glycol, 90 parts of isophorone diisocyanate, 8.7 parts of β-cyclodextrin (β-CD), 11.3 parts of white corundum powder, and 7 parts of 4,4'-methylenebiscyclohexylamine (chain extender) were weighed and set aside; the white corundum powder and β-cyclodextrin were mixed evenly, calcined and activated at 270°C for 1.3 hours, taken out and ground and sieved with 460 mesh; the powder was dispersed in 3.2 times the weight of anhydrous ethanol, deionized water and ammonia water were added, and stirred at a high speed of 2000r / min for 18 minutes; the weight of anhydrous ethanol, deionized water, and ammonia water was 2000r / min. The ratio is 3.2:1.1:1.8; filter, wash with anhydrous ethanol and then dry to obtain activated powder; add the activated powder to anhydrous ethanol, place it at 115.6℃ and stir to react for 4.5h to obtain white corundum / β-cyclodextrin modifier; Fourth, mix polyether polyol PTMG, tung oil-based diol and isophorone diisocyanate, place it at 88℃ and stir to react for 45min, cool to 78℃, add white corundum / β-cyclodextrin modifier, stir to react for 25min, and finally add 4,4'-methylenebiscyclohexylamine to carry out chain extension reaction for 1.6h to obtain scratch-resistant mirror KPU treatment agent.

[0078] Test Case

[0079] The viscosities (unit: mPa·s) of the scratch-resistant mirror KPU treating agents of Examples 1 to 3 and Comparative Examples 1 to 2 at 0 h, 0.5 h, 1 h, 1.5 h, 2 h, and 3 h were measured using a viscometer.

[0080] The scratch-resistant mirror KPU treatment agent was coated on the shoe upper with a coating thickness of 2 mm. The scratch resistance of Examples 1 to 3 and Comparative Examples 1 to 2 was tested using a tribometer at room temperature (25° C.) and low temperature (0° C.) (100 reciprocating scratches under a pressure of 10 N), and the surface was observed using a magnifying glass.

[0081]

[0082] The present invention involves reacting polyether polyol PTMG, tung oil-based diol, and isophorone diisocyanate to first increase the product's relative molecular weight and form a main chain structure. A white corundum / β-cyclodextrin / tetrahydrocurcumin modifier is then added to modify the main chain, followed by a chain extension reaction. This stabilizes the relative molecular weight of the KPU treatment agent, thereby ensuring the stability of the crystal structure (white corundum) in the KPU treatment agent and preventing crystal particle dropout, thereby ensuring scratch resistance. Furthermore, the coating film is bright and aesthetically pleasing.

[0083] The present invention activates white corundum powder by using beta-cyclodextrin, thereby increasing molecular self-assembly on the surface of the white corundum powder and increasing the number of hydroxyl groups. At the same time, after the hydroxyl-containing white corundum powder and tetrahydrocurcumin are used to prepare a modifier, the modifier can subsequently replace part of the diol, thereby reducing the usage of the diol.

[0084] The present invention forms a white corundum / β-cyclodextrin / tetrahydrocurcumin modifier by calcining and activating white corundum and adding tetrahydrocurcumin. The viscosity can be kept at a low level in the initial 0-0.5 hour, and the viscosity increases rapidly in the 0.5-2 hour period. The high viscosity characteristic can be basically exerted within 2 hours, which is conducive to improving production efficiency. At the same time, the product can ensure good scratch resistance (no damage or deformation) under both normal temperature and low temperature environments, thereby expanding the application range of the product.

[0085] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A method for preparing a scratch-resistant mirror KPU treatment agent, comprising the following steps:

1. Take the following raw materials by weight: 65-73 parts of polyether polyol PTMG, 18-25 parts of tung oil-based glycol, 85-104 parts of isophorone diisocyanate, 13-18 parts of tetrahydrocurcumin, 6.3-10.7 parts of β-cyclodextrin, 10.8-12.4 parts of white corundum powder, and 5-8.6 parts of 4,4'-methylenebiscyclohexylamine; 2. Calcination and activation treatment of white corundum 2.

1. Mix white corundum powder and β-cyclodextrin evenly, calcine and activate them, and then grind them; 2.

2. Disperse the powder in anhydrous ethanol, add deionized water and ammonia water, and stir at high speed; 2.

3. Filter, wash and dry to obtain activated powder; 3. Preparation of white corundum / β-cyclodextrin / tetrahydrocurcumin modifier Adding activated powder and tetrahydrocurcumin into anhydrous ethanol, stirring and reacting to obtain a white corundum / β-cyclodextrin / tetrahydrocurcumin modifier; Fourth, polyether polyol PTMG, tung oil-based glycol, and isophorone diisocyanate were stirred and reacted, and then white corundum / β-cyclodextrin / tetrahydrocurcumin modifiers were added and stirred and reacted, and finally 4,4'-methylenebiscyclohexylamine was added to carry out a chain extension reaction to obtain a scratch-resistant mirror KPU treatment agent; Step 2.1: Mix white corundum powder and β-cyclodextrin evenly, calcine and activate at 250-280°C for 1-2 hours, take out, grind and sieve 400-500 mesh.

2. The method for preparing the scratch-resistant mirror KPU treating agent according to claim 1, wherein: Step 2.2: Disperse the powder in 3-4 times its weight of anhydrous ethanol, add deionized water and ammonia water, and stir at a high speed of 1800-2200 rpm for 15-25 minutes.

3. The method for preparing the scratch-resistant mirror KPU treating agent according to claim 2, characterized in that: In step 2.2, the weight ratio of anhydrous ethanol, deionized water, and aqueous ammonia is 3-4:1-1.2:1.5-2.

4. The method for preparing the scratch-resistant mirror KPU treating agent according to claim 3, characterized in that: Wash with anhydrous ethanol as in step 2.

3.

5. The method for preparing the scratch-resistant mirror KPU treating agent according to claim 4, characterized in that: In step 3, the activated powder and tetrahydrocurcumin are added to anhydrous ethanol, and the mixture is stirred at 108.3-125.6° C. for 3-5 hours to obtain a white corundum / β-cyclodextrin / tetrahydrocurcumin modifier.

6. The method for preparing the scratch-resistant mirror KPU treating agent according to claim 5, characterized in that: In step 4, polyether polyol PTMG, tung oil-based glycol and isophorone diisocyanate are mixed, stirred and reacted at 85-95° C. for 35-65 minutes, cooled to 75-80° C., white corundum / β-cyclodextrin / tetrahydrocurcumin modifier is added, and stirred and reacted for 20-30 minutes.

7. The method for preparing the scratch-resistant mirror KPU treatment agent according to claim 6, characterized in that: In step 4, 4,4'-methylenebiscyclohexylamine is finally added and the original temperature is maintained to carry out a chain extension reaction for 1 to 3 hours to obtain a scratch-resistant mirror KPU treatment agent.

8. A scratch-resistant mirror KPU treatment agent prepared according to the preparation method according to any one of claims 1 to 7.

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