Scratch-resistant mirror KPU treating agent and preparation method thereof

Abstract

The invention discloses a scratch-resistant mirror surface KPU treating agent and a preparation method thereof, and belongs to the technical field of KPU treating agent preparation, and the preparation method comprises the following steps: calcining and activating white corundum to obtain activated powder; preparing an inorganic-organic modifier: preparing a white corundum / beta-cyclodextrin / tetrahydrocurcumin modifier; the preparation method comprises the following steps: stirring polyether polyol PTMG, tung oil-based diol and isophorone diisocyanate for reaction, then adding a white corundum / beta-cyclodextrin / tetrahydrocurcumin modifier for stirring reaction, and finally adding 4, 4 '-methylene dicyclohexylamine for chain extension reaction to obtain the scratch-resistant mirror KPU treating agent. According to the invention, the white corundum / beta-cyclodextrin / tetrahydrocurcumin modifier is formed by calcining and activating the white corundum and adding the tetrahydrocurcumin, so that the viscosity can be at a relatively low level in the initial 0-0.5 h, the viscosity can be rapidly increased in 0.5-2 h, and the high viscosity characteristic can be basically exerted within 2 h, thereby being beneficial to improving the production efficiency; and meanwhile, the product can ensure better scratch resistance in both normal-temperature and low-temperature environments.

Description

Technical Field

[0001] The 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 treatment agents. By applying KPU treatment agent on shoe upper leather, the visual effect of the shoe upper and the mechanical strength of the shoe upper leather can be effectively increased.

[0003] Chinese invention patent CN109267352B discloses a high-solid and low-viscosity mirror synthetic leather treatment agent and its preparation method. The solid content of the synthetic leather treatment agent can reach up to 80%. The viscosity of the synthetic leather treatment agent is low at the beginning, which is convenient for workers to operate and improves the utilization rate of the treatment agent. After a period of time, the viscosity is greatly increased to meet the actual production and living needs. However, the viscosity of the synthetic leather treatment agent increases exponentially every hour, and it takes a long time to play the high viscosity characteristics, which will affect production efficiency to a certain extent.

[0004] Chinese invention patent CN109898342B discloses a method for preparing scratch-resistant synthetic leather based on high-rebound waterborne polyurethane, which has good scratch resistance through high rebound. However, in low temperature environment, the rebound elasticity is significantly reduced, and the scratch resistance is greatly affected by low temperature.

[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 treating 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 are stirred to react, and then white corundum / β-cyclodextrin / tetrahydrocurcumin modifier is added and stirred to react, and finally 4,4'-methylenebiscyclohexylamine is added to carry out a 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, and then taken out and 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 stirred at a high speed of 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, in step 2.3, the sample is washed with anhydrous ethanol.

[0021] Furthermore, in step 3, the activated powder and tetrahydrocurcumin are added to anhydrous ethanol, and the mixture is stirred and reacted 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 diol and isophorone diisocyanate are mixed, placed at 85-95° C. and stirred for reaction for 35-65 min, cooled to 75-80° C., white corundum / β-cyclodextrin / tetrahydrocurcumin modifier is added, stirred for reaction for 20-30 min, and finally 4,4'-methylenebiscyclohexylamine is added for chain extension reaction for 1-3 h 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 polyether polyol PTMG, tung oil-based diol and isophorone diisocyanate of the present invention are reacted to first increase the relative molecular weight of the product to form a main chain structure, then add white corundum / β-cyclodextrin / tetrahydrocurcumin modifier to modify the main chain, and then perform a chain extension reaction, which is beneficial to the stability of the relative molecular weight of the KPU treatment agent, thereby ensuring that the stability of the crystal structure (white corundum) in the KPU treatment agent is difficult to be destroyed, avoiding the falling of crystal particles, and thus facilitating the guarantee of scratch resistance. The coating film is bright and beautiful.

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

[0027] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described in combination with the embodiments of the present invention. Obviously, the described embodiments are 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 creative work are within the scope of protection of the present invention.

[0028] Example 1 Preparation of scratch-resistant mirror KPU treatment 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 are stirred to react, and then white corundum / β-cyclodextrin / tetrahydrocurcumin modifier is added and stirred to react, and finally 4,4'-methylenebiscyclohexylamine is added to carry out a 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, add the activated powder and tetrahydrocurcumin to anhydrous ethanol, place it at 108.3℃ and stir to react for 5h to obtain white corundum / β-cyclodextrin / tetrahydrocurcumin modifier; Fourth, mix polyether polyol PTMG, tung oil-based diol and isophorone diisocyanate, place it at 85℃ and stir to react for 65min, cool to 75℃, add white corundum / β-cyclodextrin / tetrahydrocurcumin modifier, stir to react for 30min, and finally add 4,4'-methylenebiscyclohexylamine to carry out chain extension reaction for 1h to obtain 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 are stirred to react, and then white corundum / β-cyclodextrin / tetrahydrocurcumin modifier is added and stirred to react, and finally 4,4'-methylenebiscyclohexylamine is added to carry out a 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, Get activated powder; add the activated powder and tetrahydrocurcumin into anhydrous ethanol, stir and react at 125.6°C for 3 hours to obtain white corundum / β-cyclodextrin / tetrahydrocurcumin modifier; Fourth, mix polyether polyol PTMG, tung oil-based diol and isophorone diisocyanate, stir and react at 95°C for 35 minutes, cool to 80°C, add white corundum / β-cyclodextrin / tetrahydrocurcumin modifier, stir and react for 20 minutes, and finally add 4,4'-methylenebiscyclohexylamine for chain extension reaction for 3 hours to obtain 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 are stirred to react, and then white corundum / β-cyclodextrin / tetrahydrocurcumin modifier is added and stirred to react, and finally 4,4'-methylenebiscyclohexylamine is added to carry out a 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, and 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 and 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 into anhydrous ethanol, stir and react at 115.6°C for 4.5 hours to obtain white corundum / β-cyclodextrin / tetrahydrocurcumin modifier; 4. Mix polyether polyol PTMG, tung oil-based diol and isophorone diisocyanate, stir and react at 88°C for 45 minutes, cool to 78°C, add white corundum / β-cyclodextrin / tetrahydrocurcumin modifier, stir and react for 25 minutes, and finally add 4,4'-methylenebiscyclohexylamine for chain extension reaction for 1.6 hours to obtain a scratch-resistant mirror KPU treatment agent.

[0058] Comparative Example 1 Preparation of mirror KPU treatment 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] Take white corundum powder and β-cyclodextrin and mix them 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 are stirred to react, and then white corundum / β-cyclodextrin / tetrahydrocurcumin modifier is added and stirred to react, and finally 4,4'-methylenebiscyclohexylamine is added to carry out a 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, and 15 parts of tetrahydrocurcumin (C 21 H 24 O6), 8.7 parts of β-cyclodextrin (β-CD), 11.3 parts of white corundum powder, and 7 parts of 4,4'-methylenebiscyclohexylamine (chain extender) for later use; take the white corundum powder and β-cyclodextrin and mix them evenly, grind and sieve 460 mesh to obtain activated powder; add the activated powder and tetrahydrocurcumin into anhydrous ethanol, stir and react at 115.6°C for 4.5h to obtain white corundum / β-cyclodextrin / tetrahydrocurcumin modifier; 4. Mix polyether polyol PTMG, tung oil-based diol and isophorone diisocyanate, stir and react at 88°C for 45min, cool to 78°C, add white corundum / β-cyclodextrin / tetrahydrocurcumin modifier, stir and 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 treatment 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 diol, 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] Fourth, the polyether polyol PTMG, tung oil-based diol and isophorone diisocyanate are stirred to react, and then white corundum / β-cyclodextrin modifier is added and stirred to react, and finally 4,4'-methylenebiscyclohexylamine is added to carry out 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 diol, 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 through 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 2.3 times the weight of the anhydrous ethanol, and the mixture was stirred at a high speed of 2000r / min for 18 minutes. 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 into anhydrous ethanol, stir and react at 115.6°C for 4.5 hours to obtain white corundum / β-cyclodextrin modifier; fourth, mix polyether polyol PTMG, tung oil-based diol and isophorone diisocyanate, stir and react at 88°C for 45 minutes, cool to 78°C, add white corundum / β-cyclodextrin modifier, stir and react for 25 minutes, and finally add 4,4'-methylenebiscyclohexylamine for chain extension reaction for 1.6 hours 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 were measured using a viscometer at 0 h, 0.5 h, 1 h, 1.5 h, 2 h, and 3 h.

[0080] The scratch-resistant mirror KPU treatment agent is 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 is tested using a friction meter at room temperature (25° C.) and low temperature (0° C.) (100 reciprocating scratches under a pressure of 10 N), and the surface is observed using a magnifying glass.

[0081]

[0082] The polyether polyol PTMG, tung oil-based diol and isophorone diisocyanate of the present invention are reacted to first increase the relative molecular weight of the product to form a main chain structure, then add white corundum / β-cyclodextrin / tetrahydrocurcumin modifier to modify the main chain, and then perform a chain extension reaction, which is beneficial to the stability of the relative molecular weight of the KPU treatment agent, thereby ensuring that the stability of the crystal structure (white corundum) in the KPU treatment agent is difficult to be destroyed, avoiding the falling of crystal particles, and thus facilitating the guarantee of scratch resistance. The coating film is bright and beautiful.

[0083] The invention activates the white corundum powder by using beta-cyclodextrin, which can increase the molecular self-assembly on the surface of the white corundum powder to increase the number of hydroxyl groups. Meanwhile, after the hydroxyl-containing white corundum powder and tetrahydrocurcumin are used to prepare a modifier, part of the diol can be replaced subsequently, 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, so that the viscosity is at a relatively low level in the initial 0-0.5h, the viscosity increases rapidly in the 0.5h-2h, and the high viscosity characteristic can be basically exerted within 2h, which is beneficial to improving production efficiency; at the same time, the product can ensure good scratch resistance (no damage, no deformation) under normal temperature and low temperature environment, thereby improving 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 the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such 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 embodiments of the present invention.

Claims

1. A method for preparing a scratch-resistant mirror KPU treatment agent, characterized in that it comprises the following steps:

1. Take the following raw materials: polyether polyol PTMG, tung oil-based glycol, isophorone diisocyanate, tetrahydrocurcumin, β-cyclodextrin, white corundum powder, 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 Inorganic-Organic Modifiers Adding activated powder and tetrahydrocurcumin into anhydrous ethanol, stirring and reacting to obtain a white corundum / β-cyclodextrin / tetrahydrocurcumin modifier; 4. The polyether polyol PTMG, tung oil-based diol and isophorone diisocyanate are stirred to react, and then white corundum / β-cyclodextrin / tetrahydrocurcumin modifier is added and stirred to react, and finally 4,4'-methylenebiscyclohexylamine is added to carry out a chain extension reaction to obtain a scratch-resistant mirror KPU treatment agent.

2. The method for preparing the scratch-resistant mirror KPU treating agent according to claim 1, characterized in that: The components are calculated by weight as follows: 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; 3. The method for preparing the scratch-resistant mirror KPU treating agent according to claim 1, characterized in that: Step 2.1, mix white corundum powder and β-cyclodextrin evenly, place them at 250-280° C. for calcination and activation for 1-2 hours, take them out, grind them and sieve them with 400-500 mesh.

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

5. The method for preparing the scratch-resistant mirror KPU treating agent according to claim 4, 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.

6. The method for preparing the scratch-resistant mirror KPU treating agent according to claim 5, characterized in that: Wash with anhydrous ethanol in step 2.

3.

7. The method for preparing the scratch-resistant mirror KPU treating agent according to claim 6, characterized in that: In step 3, the activated powder and tetrahydrocurcumin are added to anhydrous ethanol, and the mixture is stirred and reacted at 108.3-125.6° C. for 3-5 hours to obtain a white corundum / β-cyclodextrin / tetrahydrocurcumin modifier.

8. The method for preparing the scratch-resistant mirror KPU treating agent according to claim 7, characterized in that: In step 4, polyether polyol PTMG, tung oil-based diol and isophorone diisocyanate are mixed, stirred at 85-95°C for 35-65 minutes, cooled to 75-80°C, white corundum / β-cyclodextrin / tetrahydrocurcumin modifier is added, and stirred for 20-30 minutes.

9. The method for preparing the scratch-resistant mirror KPU treating agent according to claim 7, 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.

10. A scratch-resistant mirror KPU treating agent prepared according to the preparation method according to any one of claims 1 to 9.

Images