Bio-based colorant having a neat taste effect and a method for its preparation

Abstract

This invention discloses a bio-based color paste with deodorizing properties, comprising the following raw materials in parts by weight: 30-35 parts pigment, 1-3 parts PEG400, 6-10 parts bio-based dispersant, 2-3 parts diatomaceous earth, and 40-45 parts water solvent. The bio-based color paste of this invention utilizes pigment in combination with PEG400, bio-based dispersant, and diatomaceous earth to optimize the formaldehyde removal rate of the product. Simultaneously, the product exhibits significant color retention and weather resistance. The additives are nano-magnesium oxide treated with a rare earth agent and silane coupling liquid, and further coordinated with additives to harmonize the raw materials, thereby further improving the product's performance.

Description

Technical Field

[0001] This invention relates to the field of bio-based color paste technology, specifically to a bio-based color paste with deodorizing properties and its preparation method. Background Technology

[0002] As a crucial colorant in architectural wall paints, pigments are increasingly being developed into odorless and zero-VOC materials, aligning with national green material requirements. The trend towards environmentally friendly pigments, particularly in terms of odor and VOC control, is undeniable. Many pigments, due to the addition of raw materials, easily generate VOC gases. Long-term exposure to VOCs poses certain health risks and pollutes the environment.

[0003] Existing material-based color pastes have poor odor-removing and formaldehyde-removing effects. With prolonged use, the formaldehyde removal rate decreases significantly. Furthermore, the products exhibit poor color retention and weather resistance, limiting their usability. Therefore, this invention provides further improvements. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the purpose of this invention is to provide a bio-based color paste with deodorizing effect and its preparation method, so as to solve the problems mentioned in the background art.

[0005] The present invention solves the technical problem by adopting the following technical solution: This invention provides a bio-based color paste with deodorizing properties, characterized in that it comprises the following raw materials in parts by weight: Pigment 30-35 parts, PEG400 1-3 parts, bio-based dispersant 6-10 parts, diatomaceous earth 2-3 parts, additives 3-5 parts, and water solvent 40-45 parts.

[0006] Preferably, the bio-based color paste is composed of the following raw materials in parts by weight: 32.5 parts pigment, 2 parts PEG400, 8 parts bio-based dispersant, 2.5 parts diatomaceous earth, 4 parts additives and 42.5 parts water solvent.

[0007] Preferably, the preparation method of the bio-based dispersant is as follows: Take 80-90 parts by weight of bio-based monomer, 1-2 parts of initiator, 0.5-1 part of chain transfer agent, 3-5 parts of modifier, and 5-10 parts of deionized water. The bio-based monomer is soybean oil modified acrylate, the initiator is ammonium persulfate, the chain transfer agent is mercaptoacetic acid, and the modifier is carboxymethyl chitosan. Mix the bio-based monomer, modifier, and deionized water and stir for 15-20 minutes at a speed of 200-300 rpm to dissolve the initiator and chain transfer agent. Then, heat the mixture to 65-75℃ and keep it at that temperature for 10-15 minutes to remove air. Slowly add the initiator solution at 1-2 drops / second and stir while keeping it warm for 30-40 minutes. Then, add the chain transfer agent solution and heat it to 80-85℃. React at this temperature for 2-3 hours at a speed of 300-400 rpm. The reaction solution was allowed to cool naturally to 25±2℃ to obtain a pale yellow, transparent, viscous liquid with a solid content of 40-50% and a viscosity of 500-1000 mPa·s, which is the self-made bio-based dispersant. The pigment is one of carbon black, titanium dioxide, phthalocyanine blue, or pigment red.

[0008] Preferably, the additive is prepared by: S1: Stir 1-3 parts of cerium oxide and 1-2 parts of samarium oxide evenly to obtain a rare earth agent. Stir silane coupling agent KH550 and sodium dodecylbenzene sulfonate solution at a weight ratio of 2:5 to obtain a silane coupling solution. S2: 2-4 parts rare earth agent and 3-5 parts silane coupling liquid are thoroughly mixed to obtain the treatment agent; S3: Nano magnesium oxide is first stirred in a treatment agent with a total amount of 3-5 times the amount of nano magnesium oxide. After the treatment is completed, it is filtered and dried to obtain the treated nano magnesium oxide agent. S4: The treated nano-magnesium oxide agent and modifier are mixed at a weight ratio of 5:3 and ball-milled. After ball milling, the mixture is filtered and dried to obtain the additive.

[0009] Preferably, the sodium dodecylbenzenesulfonate solution has a mass fraction of 2-5%.

[0010] Preferably, the stirring speed of the stirring treatment is 350-400 r / min, and the stirring time is 1 h; the ball milling speed of the mixing ball milling treatment is 1500 r / min, and the ball milling time is 1 h.

[0011] Preferably, the modifier is 2-5 parts by weight of kaolin, 1-2 parts by weight of stearic acid, 3-5 parts by weight of nano-alumina and 5-8 parts by weight of lanthanum chloride solution.

[0012] Preferably, the lanthanum chloride solution has a mass fraction of 2-5%.

[0013] The present invention also provides a method for preparing a bio-based color paste with deodorizing effect, comprising the following steps: adding raw materials sequentially into a mixer for stirring at a stirring speed of 800-1200 r / min for a stirring time of 35-45 min, and obtaining the bio-based color paste of the present invention after stirring.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The bio-based color paste of this invention uses pigments combined with PEG400, bio-based dispersants, and diatomaceous earth. By adding additives as auxiliaries, the formaldehyde removal rate of the product is optimized, while the product's color retention performance and weather resistance are significantly improved. The additives are made of nano-magnesium oxide treated with a treatment agent, which is obtained by fully blending rare earth agents and silane coupling liquid. Furthermore, the additives are coordinated and blended, and the raw materials in the additives are harmonized and blended together, thereby further improving the product's performance. Detailed Implementation

[0015] 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.

[0016] This embodiment of a bio-based color paste with deodorizing properties is characterized by comprising the following raw materials in parts by weight: Pigment 30-35 parts, PEG400 1-3 parts, bio-based dispersant 6-10 parts, diatomaceous earth 2-3 parts, additives 3-5 parts, and water solvent 40-45 parts.

[0017] Preferably, the bio-based color paste is composed of the following raw materials in parts by weight: 32.5 parts pigment, 2 parts PEG400, 8 parts bio-based dispersant, 2.5 parts diatomaceous earth, 4 parts additives and 42.5 parts water solvent.

[0018] The preparation method of the bio-based dispersant in this embodiment is as follows: Take 80-90 parts by weight of bio-based monomer, 1-2 parts of initiator, 0.5-1 part of chain transfer agent, 3-5 parts of modifier, and 5-10 parts of deionized water. The bio-based monomer is soybean oil modified acrylate, the initiator is ammonium persulfate, the chain transfer agent is mercaptoacetic acid, and the modifier is carboxymethyl chitosan. Mix the bio-based monomer, modifier, and deionized water and stir for 15-20 minutes at a speed of 200-300 rpm to dissolve the initiator and chain transfer agent. Then, heat the mixture to 65-75℃ and keep it at that temperature for 10-15 minutes to remove air. Slowly add the initiator solution at 1-2 drops / second and stir while keeping it warm for 30-40 minutes. Then, add the chain transfer agent solution and heat it to 80-85℃. React at this temperature for 2-3 hours at a speed of 300-400 rpm. The reaction solution was allowed to cool naturally to 25±2℃ to obtain a pale yellow, transparent, viscous liquid with a solid content of 40-50% and a viscosity of 500-1000 mPa·s, which is the self-made bio-based dispersant. The pigment is one of carbon black, titanium dioxide, phthalocyanine blue, or pigment red.

[0019] The preparation method of the additive in this embodiment is as follows: S1: Stir 1-3 parts of cerium oxide and 1-2 parts of samarium oxide evenly to obtain a rare earth agent. Stir silane coupling agent KH550 and sodium dodecylbenzene sulfonate solution at a weight ratio of 2:5 to obtain a silane coupling solution. S2: 2-4 parts rare earth agent and 3-5 parts silane coupling liquid are thoroughly mixed to obtain the treatment agent; S3: Nano magnesium oxide is first stirred in a treatment agent with a total amount of 3-5 times the amount of nano magnesium oxide. After the treatment is completed, it is filtered and dried to obtain the treated nano magnesium oxide agent. S4: The treated nano-magnesium oxide agent and modifier are mixed at a weight ratio of 5:3 and ball-milled. After ball milling, the mixture is filtered and dried to obtain the additive.

[0020] The sodium dodecylbenzenesulfonate solution in this embodiment has a mass fraction of 2-5%.

[0021] In this embodiment, the stirring speed for the stirring treatment is 350-400 r / min, and the stirring time is 1 h; the ball milling speed for the mixing ball milling treatment is 1500 r / min, and the ball milling time is 1 h.

[0022] The modifier in this embodiment is 2-5 parts by weight of kaolin, 1-2 parts of stearic acid, 3-5 parts of nano-alumina and 5-8 parts of lanthanum chloride solution.

[0023] The lanthanum chloride solution in this embodiment has a mass fraction of 2-5%.

[0024] The preparation method of a bio-based color paste with deodorizing effect in this embodiment includes the following steps: adding raw materials sequentially into a mixer and stirring at a speed of 800-1200 r / min for 35-45 min. After stirring, the bio-based color paste of the present invention is obtained.

[0025] Example 1. This embodiment of a bio-based color paste with deodorizing properties is characterized by comprising the following raw materials in parts by weight: 30 parts pigment, 1 part PEG400, 6 parts bio-based dispersant, 2 parts diatomaceous earth, 3 parts additives and 40 parts water solvent.

[0026] The preparation method of the bio-based dispersant in this embodiment is as follows: Take 80 parts by weight of bio-based monomer, 1 part of initiator, 0.5 parts of chain transfer agent, 3 parts of modifier, and 5 parts of deionized water. The bio-based monomer is soybean oil modified acrylate, the initiator is ammonium persulfate, the chain transfer agent is mercaptoacetic acid, and the modifier is carboxymethyl chitosan. The bio-based monomer, modifier, and deionized water were mixed and stirred for 15 minutes at a speed of 200 rpm to dissolve the initiator and chain transfer agent for later use. The mixture was then heated to 65°C and kept at that temperature for 10 minutes to remove air. The initiator solution was slowly added dropwise at 1 drop / second, and the mixture was stirred and kept at that temperature for 30 minutes. The chain transfer agent solution was then added dropwise, and the mixture was heated to 80°C and kept at that temperature for 2 hours at a speed of 300 rpm. The reaction solution was allowed to cool naturally to 25±2℃, resulting in a pale yellow, transparent, viscous liquid with a solid content of 40% and a viscosity of 500 mPa·s, which is the self-made bio-based dispersant. The pigment is titanium dioxide.

[0027] The preparation method of the additive in this embodiment is as follows: S1: Mix 1 part cerium oxide and 1 part samarium oxide evenly to obtain a rare earth agent. Mix silane coupling agent KH550 and sodium dodecylbenzene sulfonate solution at a weight ratio of 2:5 to obtain a silane coupling solution. S2: 2 parts rare earth agent and 3 parts silane coupling liquid are thoroughly mixed to obtain the treatment agent; S3: Nano magnesium oxide is first stirred in a treatment agent with a total amount of nano magnesium oxide. After the treatment is completed, it is filtered and dried to obtain the treated nano magnesium oxide agent. S4: The treated nano-magnesium oxide agent and modifier are mixed at a weight ratio of 5:3 and ball-milled. After ball milling, the mixture is filtered and dried to obtain the additive.

[0028] The sodium dodecylbenzenesulfonate solution in this embodiment has a mass fraction of 2%.

[0029] In this embodiment, the stirring speed for the stirring treatment is 350 r / min, and the stirring time is 1 h; the ball milling speed for the mixing ball milling treatment is 1500 r / min, and the ball milling time is 1 h.

[0030] The modifier in this embodiment is 2 parts by weight of kaolin, 1 part of stearic acid, 3 parts of nano-alumina and 5 parts of lanthanum chloride solution.

[0031] The lanthanum chloride solution in this embodiment has a mass fraction of 2%.

[0032] The preparation method of a bio-based color paste with deodorizing effect in this embodiment includes the following steps: adding raw materials sequentially into a mixer and stirring at a speed of 800 r / min for 35 min. After stirring, the bio-based color paste of the present invention is obtained.

[0033] Example 2. This embodiment of a bio-based color paste with deodorizing properties is characterized by comprising the following raw materials in parts by weight: 335 parts pigment, 3 parts PEG400, 10 parts bio-based dispersant, 3 parts diatomaceous earth, 5 parts additives and 45 parts water solvent.

[0034] The preparation method of the bio-based dispersant in this embodiment is as follows: Take 90 parts by weight of bio-based monomer, 2 parts of initiator, 1 part of chain transfer agent, 5 parts of modifier, and 10 parts of deionized water. The bio-based monomer is soybean oil modified acrylate, the initiator is ammonium persulfate, the chain transfer agent is mercaptoacetic acid, and the modifier is carboxymethyl chitosan. The bio-based monomer, modifier, and deionized water were mixed and stirred for 20 minutes at 300 rpm to dissolve the initiator and chain transfer agent for later use. The mixture was then heated to 75°C and kept at that temperature for 15 minutes to remove air. The initiator solution was slowly added dropwise at 2 drops / second, and the mixture was stirred and kept at that temperature for 40 minutes. The chain transfer agent solution was then added dropwise, and the mixture was heated to 85°C and kept at that temperature for 3 hours at 400 rpm. The reaction solution was allowed to cool naturally to 25±2℃, resulting in a pale yellow, transparent, viscous liquid with a solid content of 50% and a viscosity of 1000 mPa·s, which was the self-made bio-based dispersant; the pigment was titanium dioxide.

[0035] The preparation method of the additive in this embodiment is as follows: S1: Mix 3 parts cerium oxide and 2 parts samarium oxide evenly to obtain a rare earth agent. Mix silane coupling agent KH550 and sodium dodecylbenzene sulfonate solution at a weight ratio of 2:5 to obtain a silane coupling solution. S2: 4 parts rare earth agent and 5 parts silane coupling liquid are thoroughly mixed to obtain the treatment agent; S3: Nano magnesium oxide is first stirred in a treatment agent with a total amount of 5 times the amount of nano magnesium oxide. After the treatment is completed, it is filtered and dried to obtain the treated nano magnesium oxide agent. S4: The treated nano-magnesium oxide agent and modifier are mixed at a weight ratio of 5:3 and ball-milled. After ball milling, the mixture is filtered and dried to obtain the additive.

[0036] The sodium dodecylbenzenesulfonate solution in this embodiment has a mass fraction of 5%.

[0037] In this embodiment, the stirring speed for the stirring treatment is 400 r / min, and the stirring time is 1 h; the ball milling speed for the mixing ball milling treatment is 1500 r / min, and the ball milling time is 1 h.

[0038] The modifier in this embodiment is 5 parts by weight of kaolin, 2 parts by weight of stearic acid, 5 parts by weight of nano-alumina and 8 parts by weight of lanthanum chloride solution.

[0039] The lanthanum chloride solution in this embodiment has a mass fraction of 5%.

[0040] The preparation method of a bio-based color paste with deodorizing effect in this embodiment includes the following steps: adding raw materials sequentially into a mixer and stirring at a stirring speed of 1200 r / min for 45 min. After stirring, the bio-based color paste of the present invention is obtained.

[0041] Example 3. This embodiment of a bio-based color paste with deodorizing properties comprises the following raw materials in parts by weight: 32.5 parts pigment, 2 parts PEG400, 8 parts bio-based dispersant, 2.5 parts diatomaceous earth, 4 parts additives and 42.5 parts water solvent.

[0042] The preparation method of the bio-based dispersant in this embodiment is as follows: The following components are included by weight: 85 parts bio-based monomer, 1.5 parts initiator, 0.7 parts chain transfer agent, 4 parts modifier, and 7.5 parts deionized water. The bio-based monomer is soybean oil-modified acrylate, the initiator is ammonium persulfate, the chain transfer agent is mercaptoacetic acid, and the modifier is carboxymethyl chitosan. Mix the bio-based monomer, modifier, and deionized water and stir for 18 minutes at 250 rpm to dissolve the initiator and chain transfer agent. Then heat the mixture to 70°C and keep it at that temperature for 12 minutes to remove air. Slowly add the initiator solution at 1.5 drops / second and stir for 35 minutes. Then add the chain transfer agent solution and heat it to 82°C. React at this temperature for 2-3 hours at 350 rpm. The reaction solution was allowed to cool naturally to 25±2℃, resulting in a pale yellow, transparent, viscous liquid with a solid content of 45% and a viscosity of 750 mPa·s, which is the self-made bio-based dispersant. The pigment is titanium dioxide.

[0043] The preparation method of the additive in this embodiment is as follows: S1: Mix 2 parts cerium oxide and 1.5 parts samarium oxide evenly to obtain a rare earth agent. Mix silane coupling agent KH550 and sodium dodecylbenzene sulfonate solution at a weight ratio of 2:5 to obtain a silane coupling solution. S2: 3 parts rare earth agent and 4 parts silane coupling liquid are thoroughly mixed to obtain the treatment agent; S3: Nano magnesium oxide is first stirred in a treatment agent with a total amount of nano magnesium oxide. After the treatment is completed, it is filtered and dried to obtain the treated nano magnesium oxide agent. S4: The treated nano-magnesium oxide agent and modifier are mixed at a weight ratio of 5:3 and ball-milled. After ball milling, the mixture is filtered and dried to obtain the additive.

[0044] The sodium dodecylbenzenesulfonate solution in this embodiment has a mass fraction of 3.5%.

[0045] In this embodiment, the stirring speed for the stirring treatment is 370 r / min, and the stirring time is 1 h; the ball milling speed for the mixing ball milling treatment is 1500 r / min, and the ball milling time is 1 h.

[0046] The modifier in this embodiment is 3.5 parts by weight of kaolin, 1.5 parts by weight of stearic acid, 4 parts by weight of nano-alumina and 6.5 parts by weight of lanthanum chloride solution.

[0047] The lanthanum chloride solution in this embodiment has a mass fraction of 3.5%.

[0048] The preparation method of a bio-based color paste with deodorizing effect in this embodiment includes the following steps: adding raw materials sequentially into a mixer and stirring at a stirring speed of 1000 r / min for 40 min. After stirring is completed, the bio-based color paste of the present invention is obtained.

[0049] Comparative Example 1. Unlike Example 3, no additives were added.

[0050] Comparative Example 2. Unlike Example 3, no treated nano-magnesium oxide agent was added to the additive.

[0051] Comparative Example 3. Unlike Example 3, the treated nano-magnesium oxide agent was not treated with a treatment agent.

[0052] Comparative Example 4. Unlike Example 3, the treatment agent did not use silane coupling liquid.

[0053] Comparative Example 5. Unlike Example 3, no modifier was used in the additive.

[0054] Comparative Example 6. Unlike Example 3, kaolin and nano-alumina were not added to the modifier.

[0055] Examples 1-3 and Comparative Examples 1-6 were used for product performance testing. Simultaneously, the products underwent 200 hours of accelerated UVB lamp treatment to test their weather resistance and aging resistance, as follows:

[0056] As can be seen from Comparative Examples 1-6 and Examples 1-3, the product of the present invention has excellent formaldehyde removal rate and color retention, and the product has significant weather resistance and aging stability. The performance of products deteriorates to varying degrees when no additives are added, when no nano-magnesium oxide is added to the additives, when the nano-magnesium oxide is not treated with a treatment agent, when the treatment agent is not treated with silane coupling liquid, when no modifier is used in the additives, or when no kaolin or nano-alumina is added to the modifier. Only the additives obtained by the specific method of this invention have the most significant effect on product performance. Other methods are not as effective as those of this invention.

[0057] 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.

[0058] 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 colorant with deodorizing properties, characterized in that, Including the following parts by weight of raw materials: Pigment 30-35 parts, PEG400 1-3 parts, bio-based dispersant 6-10 parts, diatomaceous earth 2-3 parts, and water solvent 40-45 parts.

2. The bio-based colorant with deodorizing effect according to claim 1, characterized in that, The bio-based color paste is composed of the following raw materials in parts by weight: 32.5 parts pigment, 2 parts PEG400, 8 parts bio-based dispersant, 2.5 parts diatomaceous earth, and 42.5 parts water solvent.

3. The bio-based colorant with deodorizing effect according to claim 1, characterized in that, The preparation method of the bio-based dispersant is as follows: Take 80-90 parts by weight of bio-based monomer, 1-2 parts of initiator, 0.5-1 part of chain transfer agent, 3-5 parts of modifier, and 5-10 parts of deionized water. The bio-based monomer is soybean oil modified acrylate, the initiator is ammonium persulfate, the chain transfer agent is mercaptoacetic acid, and the modifier is carboxymethyl chitosan. Mix the bio-based monomer, modifier, and deionized water and stir for 15-20 minutes at a speed of 200-300 rpm to dissolve the initiator and chain transfer agent. Then, heat the mixture to 65-75℃ and keep it at that temperature for 10-15 minutes to remove air. Slowly add the initiator solution at 1-2 drops / second and stir while keeping it warm for 30-40 minutes. Then, add the chain transfer agent solution and heat it to 80-85℃. React at this temperature for 2-3 hours at a speed of 300-400 rpm. The reaction solution was allowed to cool naturally to 25±2℃ to obtain a pale yellow, transparent, viscous liquid with a solid content of 40-50% and a viscosity of 500-1000 mPa·s, which is the self-made bio-based dispersant. The pigment is one of carbon black, titanium dioxide, phthalocyanine blue, or pigment red.

4. The bio-based colorant with deodorizing effect according to claim 1, characterized in that, The preparation method of the additive is as follows: S1: Stir 1-3 parts of cerium oxide and 1-2 parts of samarium oxide evenly to obtain a rare earth agent. Stir silane coupling agent KH550 and sodium dodecylbenzene sulfonate solution at a weight ratio of 2:5 to obtain a silane coupling solution. S2: 2-4 parts rare earth agent and 3-5 parts silane coupling liquid are thoroughly mixed to obtain the treatment agent; S3: Nano magnesium oxide is first stirred in a treatment agent with a total amount of 3-5 times the amount of nano magnesium oxide. After the treatment is completed, it is filtered and dried to obtain the treated nano magnesium oxide agent. S4: The treated nano-magnesium oxide agent and modifier are mixed at a weight ratio of 5:3 and ball-milled. After ball milling, the mixture is filtered and dried to obtain the additive.

5. The bio-based colorant with deodorizing effect according to claim 4, characterized in that, The sodium dodecylbenzenesulfonate solution has a mass fraction of 2-5%.

6. The bio-based colorant with deodorizing effect according to claim 4, characterized in that, The stirring speed for the stirring treatment is 350-400 r / min, and the stirring time is 1 h; the ball milling speed for the mixing ball milling treatment is 1500 r / min, and the ball milling time is 1 h.

7. The bio-based colorant with deodorizing effect according to claim 4, characterized in that, The modifier consists of 2-5 parts by weight of kaolin, 1-2 parts by weight of stearic acid, 3-5 parts by weight of nano-alumina, and 5-8 parts by weight of lanthanum chloride solution.

8. The bio-based colorant with deodorizing effect according to claim 7, characterized in that, The lanthanum chloride solution has a mass fraction of 2-5%.

9. A method for preparing a bio-based colorant with deodorizing properties as described in any one of claims 1-8, characterized in that, Includes the following steps: The raw materials are added to the mixer in sequence and stirred at a speed of 800-1200 r / min for 35-45 min. After stirring, the bio-based color paste of the present invention is obtained.

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