A bio-based polyurethane mortar floor colorant and its preparation method

Abstract

This invention relates to the field of mortar flooring technology, specifically disclosing a bio-based polyurethane mortar flooring color paste, comprising the following raw materials in parts by weight: 15-20 parts polyurethane resin, 5-9 parts graphene dual-adjustment agent, 4-7 parts feldspar modifier, 3-5 parts silane coupling agent KH560, 2-5 parts dispersant, and 15-17 parts color powder. This invention modifies polyester polyol with castor oil, utilizing the synergistic effect of the graphene dual-adjustment agent and feldspar modifier to obtain a carrier. The addition of pigments and dispersants further prepares a color paste exhibiting excellent impact strength, improved abrasion resistance, and significantly enhanced scratch resistance stability.

Description

Technical Field

[0001] This invention relates to the field of mortar flooring technology, specifically to a bio-based polyurethane mortar flooring colorant and its preparation method. Background Technology

[0002] Flooring refers to the construction and treatment of the original ground using specific materials and processes to present a certain degree of decoration and functionality. Existing polyurethane mortar flooring pigments use bio-based modification to optimize the product's environmental protection and low-odor effect, but this can easily lead to a decrease in the product's impact strength and wear resistance. It is difficult to achieve a coordinated improvement in the product's impact strength and wear resistance, as well as poor scratch resistance stability, which limits the product's efficiency. Summary of the Invention

[0003] In view of the deficiencies of the prior art, the purpose of this invention is to provide a bio-based polyurethane mortar floor colorant and its preparation method, so as to solve the problems mentioned in the background art.

[0004] The present invention solves the technical problem by adopting the following technical solution:

[0005] This invention provides a bio-based polyurethane mortar floor colorant, comprising the following raw materials in parts by weight:

[0006] 15-20 parts polyurethane resin, 5-9 parts graphene dual modifier, 4-7 parts feldspar modifier, 3-5 parts silane coupling agent KH560, 2-5 parts dispersant, and 15-17 parts colorant.

[0007] The polyurethane resin is the polyurethane prepared by modifying polyester polyol with castor oil, as described in Chinese patent document CN113402695B. The raw material here is prior art.

[0008] Preferably, the bio-based polyurethane mortar floor colorant comprises the following raw materials in parts by weight:

[0009] 17.5 parts polyurethane resin, 7 parts graphene dual modifier, 5.5 parts feldspar modifier, 4 parts silane coupling agent KH560, 3.5 parts dispersant, and 16 parts colorant.

[0010] Preferably, the dispersant is BYK-2152; the pigment is either iron blue or iron green.

[0011] Preferably, the preparation method of the graphene dual-adjustment agent is as follows:

[0012] First, the sheet graphene is evenly dispersed in a 5% sodium hydroxide solution with a mass fraction of 3-5 times the total amount of sheet graphene. Then, it is washed with water and dried. Next, the dried sheet graphene and the modification solution are stirred and reacted at a weight ratio of 2:7. After stirring, it is washed with water and dried to obtain the modified graphene agent.

[0013] The preparation method of the modified liquid is as follows:

[0014] Add 2-4 parts of lanthanum chloride solution to 4-7 parts of sodium dodecylbenzenesulfonate solution, then add 1-2 parts of glycolic acid and 0.25-0.35 parts of 5% chitosan solution, stir and mix well to obtain the modified solution;

[0015] The modified graphene agent and the effect-modifying two-way agent were mixed at a weight ratio of 5:2 and ball-milled at a speed of 1000-1500 r / min for 1-2 h. After ball milling, the mixture was washed with water and dried to obtain the graphene two-way modifier.

[0016] Preferably, the stirring temperature of the stirring reaction treatment is 50-55℃, the stirring speed is 350-450 r / min, and the stirring time is 40-50 min.

[0017] Preferably, the lanthanum chloride solution has a mass fraction of 3-5%; and the sodium dodecylbenzenesulfonate solution has a mass fraction of 10-15%.

[0018] Preferably, the effect-modifying two-way agent comprises the following raw materials in parts by weight:

[0019] 2-4 parts silicon carbide whiskers, 1-3 parts sodium lignosulfonate, 0.5-0.7 parts phosphate buffer solution, 3-5 parts yttrium nitrate solution and 1-2 parts nano silica sol.

[0020] Preferably, the pH value of the phosphate buffer solution is 5.0; and the mass fraction of the yttrium nitrate solution is 4-7%.

[0021] Preferably, the feldspar modifier is prepared by:

[0022] S01: First, soak the feldspar in a sufficient amount of 2% hydrochloric acid solution for 1-2 hours, then take it out and place it in a proton irradiation chamber for 10-20 minutes with an irradiation power of 350-400W. After irradiation, the feldspar treatment agent is obtained.

[0023] S02: Add 5-10 parts of feldspar treatment agent to 15-20 parts of sodium citrate solution and stir evenly to obtain feldspar liquid agent;

[0024] SO3: 4-7 parts feldspar liquid, 1-3 parts tetra-n-propylzirconate, and 2-5 parts urea are ultrasonicated at 400-500W for 1-2 hours. After ultrasonication, the mixture is washed with water and dried to obtain the feldspar modifier.

[0025] This invention also provides a method for preparing bio-based polyurethane mortar floor pigment, comprising the following steps:

[0026] Step 1: Weigh the raw materials according to their weight proportions:

[0027] Step two: Add the raw materials to the ball mill in sequence for ball milling. The ball milling speed is 1000-1500 r / min, and the ball milling time is 1-2 hours to produce the mortar floor color paste of the present invention.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] This invention utilizes self-emulsifying modified bio-based castor oil materials to prepare a castor oil-based waterborne polyurethane. Compared to traditional petroleum-based polyurethane, the castor oil-based polyurethane exhibits superior mechanical and chemical properties, and is also environmentally friendly and low-odor during construction. Castor oil is a naturally occurring bio-based material, the only plant oil containing multiple hydroxyl groups, and can be used as a monomer unit for preparing polyols in green polymers. Utilizing the trifunctional groups of castor oil to synthesize bio-based hyperbranched polyols is of great significance for the preparation of bio-based polyurethanes. This patent modifies polyester polyols with castor oil, and utilizes graphene dual-adjustment agents and feldspar modifiers to synergistically enhance the carrier. Further, by adding pigments and dispersants, a color paste is prepared, exhibiting excellent impact strength, improved abrasion resistance, and significantly enhanced scratch resistance stability. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to specific examples. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] This embodiment of the invention provides a bio-based polyurethane mortar floor colorant, comprising the following raw materials in parts by weight:

[0032] 15-20 parts polyurethane resin, 5-9 parts graphene dual modifier, 4-7 parts feldspar modifier, 3-5 parts silane coupling agent KH560, 2-5 parts dispersant, and 15-17 parts colorant.

[0033] The polyurethane resin is the polyurethane prepared by modifying polyester polyol with castor oil, as described in Chinese patent document CN113402695B. The raw material here is prior art.

[0034] Preferably, the bio-based polyurethane mortar floor colorant comprises the following raw materials in parts by weight:

[0035] 17.5 parts polyurethane resin, 7 parts graphene dual modifier, 5.5 parts feldspar modifier, 4 parts silane coupling agent KH560, 3.5 parts dispersant, and 16 parts colorant.

[0036] The dispersant in this embodiment is BYK-2152; the pigment is either iron blue or iron green.

[0037] The preparation method of the graphene dual-adjustment agent in this embodiment is as follows:

[0038] First, the sheet graphene is evenly dispersed in a 5% sodium hydroxide solution with a mass fraction of 3-5 times the total amount of sheet graphene. Then, it is washed with water and dried. Next, the dried sheet graphene and the modification solution are stirred and reacted at a weight ratio of 2:7. After stirring, it is washed with water and dried to obtain the modified graphene agent.

[0039] The preparation method of the modified liquid is as follows:

[0040] Add 2-4 parts of lanthanum chloride solution to 4-7 parts of sodium dodecylbenzenesulfonate solution, then add 1-2 parts of glycolic acid and 0.25-0.35 parts of 5% chitosan solution, stir and mix well to obtain the modified solution;

[0041] The modified graphene agent and the effect-modifying two-way agent were mixed at a weight ratio of 5:2 and ball-milled at a speed of 1000-1500 r / min for 1-2 h. After ball milling, the mixture was washed with water and dried to obtain the graphene two-way modifier.

[0042] In this embodiment, the stirring temperature for the stirring reaction process is 50-55℃, the stirring speed is 350-450 r / min, and the stirring time is 40-50 min.

[0043] In this embodiment, the lanthanum chloride solution has a mass fraction of 3-5%; the sodium dodecylbenzenesulfonate solution has a mass fraction of 10-15%.

[0044] The effect-modifying two-way agent in this embodiment comprises the following raw materials in parts by weight:

[0045] 2-4 parts silicon carbide whiskers, 1-3 parts sodium lignosulfonate, 0.5-0.7 parts phosphate buffer solution, 3-5 parts yttrium nitrate solution and 1-2 parts nano silica sol.

[0046] The phosphate buffer solution in this embodiment has a pH of 5.0; the yttrium nitrate solution has a mass fraction of 4-7%.

[0047] The preparation method of the feldspar modifier in this embodiment is as follows:

[0048] S01: First, soak the feldspar in a sufficient amount of 2% hydrochloric acid solution for 1-2 hours, then take it out and place it in a proton irradiation chamber for 10-20 minutes with an irradiation power of 350-400W. After irradiation, the feldspar treatment agent is obtained.

[0049] S02: Add 5-10 parts of feldspar treatment agent to 15-20 parts of sodium citrate solution and stir evenly to obtain feldspar liquid agent;

[0050] SO3: 4-7 parts feldspar liquid, 1-3 parts tetra-n-propylzirconate, and 2-5 parts urea are ultrasonicated at 400-500W for 1-2 hours. After ultrasonication, the mixture is washed with water and dried to obtain the feldspar modifier.

[0051] This embodiment describes a method for preparing a bio-based polyurethane mortar floor colorant, comprising the following steps:

[0052] Step 1: Weigh the raw materials according to their weight proportions:

[0053] Step two: Add the raw materials to the ball mill in sequence for ball milling. The ball milling speed is 1000-1500 r / min, and the ball milling time is 1-2 hours to produce the mortar floor color paste of the present invention.

[0054] Example 1.

[0055] This embodiment of the invention provides a bio-based polyurethane mortar floor colorant, comprising the following raw materials in parts by weight:

[0056] 15 parts polyurethane resin, 5 parts graphene dual modifier, 4 parts feldspar modifier, 3 parts silane coupling agent KH560, 2 parts dispersant, and 16 parts colorant.

[0057] The polyurethane resin is the polyurethane prepared by modifying polyester polyol with castor oil, as described in Chinese patent document CN113402695B. The raw material here is prior art.

[0058] The dispersant in this embodiment is BYK-2152; the pigment is iron blue.

[0059] The preparation method of the graphene dual-adjustment agent in this embodiment is as follows:

[0060] First, the sheet graphene is evenly dispersed in a 5% sodium hydroxide solution with a mass fraction of 3 times the total amount of sheet graphene. Then, it is washed with water and dried. Next, the dried sheet graphene and the modification solution are stirred and reacted at a weight ratio of 2:7. After stirring, it is washed with water and dried to obtain the modified graphene agent.

[0061] The preparation method of the modified liquid is as follows:

[0062] Add 2 parts of lanthanum chloride solution to 4 parts of sodium dodecylbenzenesulfonate solution, then add 1 part of glycolic acid and 0.25 parts of 5% chitosan solution, stir and mix well to obtain the modified solution;

[0063] The modified graphene agent and the effect-modifying two-way agent were mixed at a weight ratio of 5:2 and ball-milled at a speed of 1000 r / min for 1 h. After ball milling, the mixture was washed with water and dried to obtain the graphene two-way agent.

[0064] In this embodiment, the stirring temperature for the stirring reaction process is 50°C, the stirring speed is 350 r / min, and the stirring time is 40-50 min.

[0065] In this embodiment, the lanthanum chloride solution has a mass fraction of 3%; the sodium dodecylbenzenesulfonate solution has a mass fraction of 10%.

[0066] The effect-modifying two-way agent in this embodiment comprises the following raw materials in parts by weight:

[0067] Two parts silicon carbide whiskers, one part sodium lignosulfonate, 0.5 parts phosphate buffer solution, three parts yttrium nitrate solution, and one part nano silica sol.

[0068] The pH value of the phosphate buffer solution in this embodiment is 5.0; the mass fraction of the yttrium nitrate solution is 4%.

[0069] The preparation method of the feldspar modifier in this embodiment is as follows:

[0070] S01: First, soak the feldspar in a sufficient amount of 2% hydrochloric acid solution for 1 hour, then take it out and place it in a proton irradiation chamber for 10 minutes with an irradiation power of 350W. After irradiation, the feldspar treatment agent is obtained.

[0071] S02: Add 5 parts of feldspar treatment agent to 15 parts of sodium citrate solution and stir evenly to obtain feldspar liquid agent;

[0072] S03: 4 parts feldspar liquid, 1 part tetra-n-propylzirconate, and 2 parts urea were ultrasonicated at 400W for 1 hour. After ultrasonication, the mixture was washed with water and dried to obtain the feldspar modifier.

[0073] This embodiment describes a method for preparing a bio-based polyurethane mortar floor colorant, comprising the following steps:

[0074] Step 1: Weigh the raw materials according to their weight proportions:

[0075] Step two: Add the raw materials to the ball mill in sequence for ball milling. The ball milling speed is 1000 r / min and the ball milling time is 1 hour to produce the mortar floor color paste of the present invention.

[0076] Example 2.

[0077] This embodiment of the invention provides a bio-based polyurethane mortar floor colorant, comprising the following raw materials in parts by weight:

[0078] 20 parts polyurethane resin, 9 parts graphene dual modifier, 7 parts feldspar modifier, 5 parts silane coupling agent KH560, 5 parts dispersant, and 17 parts colorant.

[0079] The polyurethane resin is the polyurethane prepared by modifying polyester polyol with castor oil, as described in Chinese patent document CN113402695B. The raw material here is prior art.

[0080] The dispersant in this embodiment is BYK-2152; the pigment is iron blue.

[0081] The preparation method of the graphene dual-adjustment agent in this embodiment is as follows:

[0082] First, the sheet graphene is evenly dispersed in a 5% sodium hydroxide solution with a mass fraction of 5 times the total amount of sheet graphene. Then, it is washed with water and dried. Next, the dried sheet graphene and the modification solution are stirred and reacted at a weight ratio of 2:7. After stirring, it is washed with water and dried to obtain the modified graphene agent.

[0083] The preparation method of the modified liquid is as follows:

[0084] Add 4 parts of lanthanum chloride solution to 7 parts of sodium dodecylbenzenesulfonate solution, then add 1-2 parts of glycolic acid and 0.35 parts of 5% chitosan solution, stir and mix well to obtain the modified solution;

[0085] The modified graphene agent and the effect-modifying two-way agent were mixed at a weight ratio of 5:2 and ball-milled at a speed of 1500 r / min for 2 h. After ball milling, the mixture was washed with water and dried to obtain the graphene two-way agent.

[0086] In this embodiment, the stirring temperature for the stirring reaction process is 55°C, the stirring speed is 450 r / min, and the stirring time is 50 min.

[0087] In this embodiment, the lanthanum chloride solution has a mass fraction of 5%; the sodium dodecylbenzenesulfonate solution has a mass fraction of 15%.

[0088] The effect-modifying two-way agent in this embodiment comprises the following raw materials in parts by weight:

[0089] The mixture consisted of 4 parts silicon carbide whiskers, 3 parts sodium lignosulfonate, 0.7 parts phosphate buffer solution, 5 parts yttrium nitrate solution, and 2 parts nano silica sol.

[0090] The pH value of the phosphate buffer solution in this embodiment is 5.0; the mass fraction of the yttrium nitrate solution is 7%.

[0091] The preparation method of the feldspar modifier in this embodiment is as follows:

[0092] S01: First, soak the feldspar in a sufficient amount of 2% hydrochloric acid solution for 2 hours, then take it out and place it in a proton irradiation chamber for 20 minutes with an irradiation power of 400W. After irradiation, the feldspar treatment agent is obtained.

[0093] S02: Add 10 parts of feldspar treatment agent to 20 parts of sodium citrate solution and stir evenly to obtain feldspar liquid agent;

[0094] S03: 7 parts feldspar liquid, 3 parts tetra-n-propylzirconate, and 5 parts urea were ultrasonicated at 500W for 2 hours. After ultrasonication, the mixture was washed with water and dried to obtain the feldspar modifier.

[0095] This embodiment describes a method for preparing a bio-based polyurethane mortar floor colorant, comprising the following steps:

[0096] Step 1: Weigh the raw materials according to their weight proportions:

[0097] Step two: Add the raw materials to the ball mill in sequence for ball milling. The ball milling speed is 1500 r / min and the ball milling time is 2 hours to produce the mortar floor color paste of the present invention.

[0098] Example 3.

[0099] This embodiment of the invention provides a bio-based polyurethane mortar floor colorant, comprising the following raw materials in parts by weight:

[0100] 17.5 parts polyurethane resin, 7 parts graphene dual modifier, 5.5 parts feldspar modifier, 4 parts silane coupling agent KH560, 3.5 parts dispersant, and 16 parts colorant.

[0101] The dispersant in this embodiment is BYK-2152; the pigment is iron green.

[0102] The preparation method of the graphene dual-adjustment agent in this embodiment is as follows:

[0103] First, the sheet graphene is evenly dispersed in a 5% sodium hydroxide solution, which is 4 times the total amount of sheet graphene. Then, it is washed with water and dried. Next, the dried sheet graphene and the modification solution are stirred and reacted at a weight ratio of 2:7. After stirring, the mixture is washed with water and dried to obtain the modified graphene agent.

[0104] The preparation method of the modified liquid is as follows:

[0105] Add 3 parts of lanthanum chloride solution to 5.5 parts of sodium dodecylbenzenesulfonate solution, then add 1.5 parts of glycolic acid and 0.30 parts of 5% chitosan solution, stir and mix well to obtain the modified solution;

[0106] The modified graphene agent and the effect-modifying two-way agent were mixed at a weight ratio of 5:2 and ball-milled at a speed of 1250 r / min for 1.5 h. After ball milling, the mixture was washed with water and dried to obtain the graphene two-way modifier.

[0107] In this embodiment, the stirring temperature for the stirring reaction process is 50-55℃, the stirring speed is 350-450 r / min, and the stirring time is 40-50 min.

[0108] In this embodiment, the lanthanum chloride solution has a mass fraction of 3-5%; the sodium dodecylbenzenesulfonate solution has a mass fraction of 10-15%.

[0109] The effect-modifying two-way agent in this embodiment comprises the following raw materials in parts by weight:

[0110] The mixture consisted of 3 parts silicon carbide whiskers, 2 parts sodium lignosulfonate, 0.6 parts phosphate buffer solution, 4 parts yttrium nitrate solution, and 1.5 parts nano silica sol.

[0111] The pH value of the phosphate buffer solution in this embodiment is 5.0; the mass fraction of the yttrium nitrate solution is 5.5%.

[0112] The preparation method of the feldspar modifier in this embodiment is as follows:

[0113] S01: First, soak the feldspar in a sufficient amount of 2% hydrochloric acid solution for 1.5 hours, then take it out and place it in a proton irradiation chamber for 15 minutes with an irradiation power of 370W. After irradiation, the feldspar treatment agent is obtained.

[0114] S02: Add 7.5 parts of feldspar treatment agent to 17.5 parts of sodium citrate solution and stir evenly to obtain feldspar liquid agent;

[0115] SO3: 5.5 parts feldspar liquid, 2 parts tetra-n-propylzirconate, and 3.5 parts urea were ultrasonicated at 470W for 1.5 hours. After ultrasonication, the mixture was washed with water and dried to obtain the feldspar modifier.

[0116] This embodiment describes a method for preparing a bio-based polyurethane mortar floor colorant, comprising the following steps:

[0117] Step 1: Weigh the raw materials according to their weight proportions:

[0118] Step two: The raw materials are added to a ball mill in sequence for ball milling. The ball milling speed is 1250 r / min and the ball milling time is 1.5 h to produce the mortar floor color paste of the present invention.

[0119] Comparative Example 1.

[0120] Unlike Example 3, no graphene dual modifier was added.

[0121] Comparative Example 2.

[0122] Unlike Example 3, no modified liquid treatment was used in the preparation of the graphene dual modifier.

[0123] Comparative Example 3.

[0124] Unlike Example 3, no effect-modifying two-way agent treatment was used.

[0125] Comparative Example 4.

[0126] Unlike Example 3, the two-way modulator did not contain silicon carbide whiskers or sodium lignosulfonate.

[0127] Comparative Example 5.

[0128] Unlike Example 3, the two-way modulator did not contain yttrium nitrate solution or nano-silica sol.

[0129] Comparative Example 6.

[0130] Unlike Example 3, no feldspar modifier was added.

[0131] Comparative Example 7.

[0132] Unlike Example 3, feldspar was used instead of feldspar as the modifier.

[0133] The products prepared in Examples 1-3 and Comparative Examples 1-7 were mixed with existing mortar floor coatings (using readily available raw materials purchased directly) at a weight ratio of 1:10. Their performance was then tested under normal conditions and after 100 scratch cycles to assess scratch resistance. The results are as follows:

[0134]

[0135] From Examples 1-3 and Comparative Examples 1-7, it can be seen that the product of Example 3 of the present invention has excellent coordinated improvement in impact strength and wear resistance, and at the same time, it has significant scratch resistance stability.

[0136] The performance of products prepared without the addition of either graphene dual-adjustment agent or feldspar modifier showed a significant downward trend. Furthermore, the performance of products prepared without modification liquid treatment, without the use of a dual-adjustment agent, without the addition of silicon carbide whiskers and sodium lignosulfonate to the dual-adjustment agent, without the addition of yttrium nitrate solution and nano-silica sol, and with feldspar used as a substitute for the feldspar modifier all showed a significant downward trend. Only the graphene dual-adjustment agent and feldspar modifier prepared using the method of this invention showed the most significant performance improvement; other methods were not as effective as those of this invention.

[0137] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

[0138] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A bio-based polyurethane mortar floor colorant, characterized in that, Including the following parts by weight of raw materials: The mixture comprises 15-20 parts polyurethane resin, 5-9 parts graphene dual-adjustment agent, 4-7 parts feldspar modifier, 3-5 parts silane coupling agent KH560, 2-5 parts dispersant, and 15-17 parts colorant; the preparation method of the graphene dual-adjustment agent is as follows: First, the sheet graphene is evenly dispersed in a 5% sodium hydroxide solution with a mass fraction of 3-5 times the total amount of sheet graphene. Then, it is washed with water and dried. Next, the dried sheet graphene and the modification solution are stirred and reacted at a weight ratio of 2:

7. After stirring, it is washed with water and dried to obtain the modified graphene agent. The preparation method of the modified liquid is as follows: Add 2-4 parts of lanthanum chloride solution to 4-7 parts of sodium dodecylbenzenesulfonate solution, then add 1-2 parts of glycolic acid and 0.25-0.35 parts of 5% chitosan solution, stir and mix well to obtain the modified solution; The modified graphene agent and the effect-modifying two-way agent were mixed at a weight ratio of 5:2 and ball-milled at a speed of 1000-1500 r / min for 1-2 h. After ball milling, the mixture was washed with water and dried to obtain the graphene two-way agent. The effect-modifying two-way agent comprises the following raw materials in parts by weight: 2-4 parts silicon carbide whiskers, 1-3 parts sodium lignosulfonate, 0.5-0.7 parts phosphate buffer solution, 3-5 parts yttrium nitrate solution and 1-2 parts nano silica sol; The preparation method of the feldspar modifier is as follows: S01: First, soak the feldspar in a sufficient amount of 2% hydrochloric acid solution for 1-2 hours, then take it out and place it in a proton irradiation chamber for 10-20 minutes with an irradiation power of 350-400W. After irradiation, the feldspar treatment agent is obtained. S02: Add 5-10 parts of feldspar treatment agent to 15-20 parts of sodium citrate solution and stir evenly to obtain feldspar liquid agent; SO3: 4-7 parts feldspar liquid, 1-3 parts tetra-n-propylzirconate, and 2-5 parts urea are ultrasonicated at 400-500W for 1-2 hours. After ultrasonication, the mixture is washed with water and dried to obtain the feldspar modifier.

2. The bio-based polyurethane mortar floor colorant according to claim 1, characterized in that, The bio-based polyurethane mortar floor colorant comprises the following raw materials in parts by weight: 17.5 parts polyurethane resin, 7 parts graphene dual modifier, 5.5 parts feldspar modifier, 4 parts silane coupling agent KH560, 3.5 parts dispersant, and 16 parts colorant.

3. The bio-based polyurethane mortar floor colorant according to claim 1, characterized in that, The dispersant is BYK-2152; the pigment is either iron blue or iron green.

4. The bio-based polyurethane mortar floor colorant according to claim 1, characterized in that, The stirring temperature for the stirring reaction treatment is 50-55℃, the stirring speed is 350-450 r / min, and the stirring time is 40-50 min.

5. The bio-based polyurethane mortar floor colorant according to claim 1, characterized in that, The lanthanum chloride solution has a mass fraction of 3-5%; the sodium dodecylbenzenesulfonate solution has a mass fraction of 10-15%.

6. The bio-based polyurethane mortar floor colorant according to claim 1, characterized in that, The pH value of the phosphate buffer solution is 5.0; the mass fraction of the yttrium nitrate solution is 4-7%.

7. A method for preparing a bio-based polyurethane mortar floor colorant as described in any one of claims 1-6, characterized in that, Includes the following steps: Step 1: Weigh the raw materials according to their weight proportions: Step 2: Add the raw materials to the ball mill in sequence for ball milling. The ball milling speed is 1000-1500 r / min, and the ball milling time is 1-2 hours to obtain the mortar floor color paste.

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