A carrier-free pre-dispersed pigment color pearl

Abstract

The application discloses a carrier-free pre-dispersed pigment color pearl, which comprises the following raw materials in parts: dispersing agent 8-15 parts, diffusion powder 3 parts, pigment diluent 2 parts, wax powder 1-5 parts, and polar azo pigment modified bone powder 72-85 parts. The carrier-free pre-dispersed pigment color pearl has higher weather resistance, good dispersion effect, good gloss, stable quality and low production cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of pigments which are easily dispersed in plastics, have high color strength, good compatibility and are environmentally friendly, and in particular to a carrier-free pre-dispersed pigment color treasure. BACKGROUND

[0002] Plastics are widely used in agriculture, industry, construction, packaging, and people's daily life and other fields, and the coloring of plastics can improve the performance and quality of plastic products. The colored plastic bags have higher weather resistance and can prevent ultraviolet radiation. In agriculture, the use of different colored mulch films according to the growth habits of different crops can improve their production quality.

[0003] In the plastic manufacturing industry, the traditional pigment pre-dispersion process includes:

[0004] Hot melt method: using a melting mixing device, the pigment and carrier resin are heated to a molten state, then the pigment is uniformly dispersed in the carrier resin by stirring, shearing and other methods, and then ground to obtain a pigment pre-dispersion that can be directly used for producing plastic products;

[0005] Wet dispersion: first, the pigment, additives and carrier resin are poured into a solvent in a certain proportion, and the pigment is uniformly dispersed in the carrier resin by a high-speed stirring device, then the solvent is removed by evaporation and drying, and finally the pigment pre-dispersion is obtained after grinding;

[0006] However, different raw materials are difficult to perfectly blend, and the pigment pre-dispersion has limitations, which can only perfectly blend on the basis of the same raw materials to maximize the product's own advantages. In addition, a large amount of dust is generated during production, which destroys the production environment, affects the health of workers, and the color dispersion is uneven, which cannot meet the expected requirements.

[0007] The existing pigment pre-dispersion process is a dispersant processing method: adding a high molecular dispersant, which is anchored on the surface of the pigment particles by electrostatic repulsion, van der Waals force and ionic bond, so that it forms small clusters that are not easy to adhere to each other, thereby increasing the dispersion performance of the pigment. The pigment pre-dispersion prepared by this method can be dispersed in different polar media, so its application range is wider and its versatility is stronger.

[0008] However, research has found that the position of the hydrophilic group and the hydrophobic group in the molecular structure of this high molecular dispersant and the proportion of the hydrophilic group and the hydrophobic group have a great influence on the surface tension, interfacial tension and wettability of the pigment pre-dispersion, which causes changes in the color strength, dispersibility and weather resistance of the pigment, making it difficult to achieve the expected effect. And the molecular structure of this high molecular dispersant is difficult to control in the polymerization process, and the production cost is high. SUMMARY

[0009] In view of the deficiencies of the prior art, the purpose of the present application is to provide a carrier-free pre-dispersed pigment color treasure which can be used on different raw materials and can improve the pigment content by 46% to 55%, has good dispersion effect, strong weather resistance, good gloss, stable quality and low production cost.

[0010] To achieve the above-mentioned purpose, the scheme provided by the present application is: a carrier-free pre-dispersed pigment color treasure, comprising the following raw materials by weight:

[0011] 8-15 parts of dispersing agent, 3 parts of diffusion powder, 2 parts of pigment diluent, 5 parts of PE wax powder, and 72-85 parts of polar azo pigment modified bone powder;

[0012] The preparation method of the polar azo pigment modified bone powder specifically comprises the following steps:

[0013] S1, weigh the polar azo pigment and dissolve it in deionized water, the mass ratio of the polar azo pigment to the volume of deionized water is 2:1, then uniformly stir it with a magnetic stirrer at 40℃ for 0.5h to obtain a polar azo pigment aqueous solution;

[0014] S2, weigh the bone powder and slowly and uniformly pour it into the azo pigment aqueous solution, stir for 1h and then stand for 24h to obtain a mixed slurry, the mass ratio of the polar azo pigment to the bone powder is 50:1;

[0015] S3, repeatedly wash the mixed slurry with deionized water until the floating color is removed, then filter, put it into a 100℃ air drying oven for drying, crush and grind to obtain the polar azo pigment modified bone powder;

[0016] Bone is a natural biomaterial, its main components include inorganic compounds: hydroxyapatite, calcium phosphate; organic compounds: collagen, amino acids and fatty acids, etc. Among them, collagen provides elasticity and toughness to the bone, calcium salt provides hardness and rigidity to the bone, in addition, the organic matter and inorganic matter in the bone are arranged alternately, so that the crack propagation is blocked when the bone is impacted by the outside world, through the synergistic effect of crack deflection, fiber pull-out and bridging, the toughness is greatly increased while maintaining high strength, so the bone has hardness and toughness that other natural materials cannot match.

[0017] The bone powder is prepared by alkali treatment, crushing and grinding. The organic matter on the surface of the bone powder is partially destroyed and exposed on the surface of the powder. The exposed organic groups can be directly connected to the surface of the matrix or the original molecular structure, so as to change the properties of the polymer matrix or optimize the function of the polymer matrix. The organic matter on the bone powder is hydrophobic, and the inorganic minerals in the bone powder are hydrophilic, so the bone powder has hydrophilic and lipophilic properties, and is suitable for various polymer materials. The organic groups accounting for about 30% by weight of the bone powder improve the surface activity and form a "bridge" between the polymer matrix, so that the bone powder can be uniformly dispersed in the polymer matrix. The bone powder with good interfacial adhesion with the polymer matrix can partially bear external load, transfer stress and absorb impact energy, thereby significantly improving the mechanical and physical properties of the polymer matrix composite. Therefore, the bone powder can effectively improve the comprehensive properties of the polymer material without greatly increasing the specific gravity of the polymer material, and realize high-value utilization of resources.

[0018] However, the bone powder has great differences in thermal expansion coefficient, melting point, surface properties and the like with the organic polymer matrix used for making plastic, and the interface compatibility between the bone powder and the organic polymer matrix is poor, so that the bone powder is easy to agglomerate, the interface adhesion between the bone powder and the polymer is poor, and the polymer material is brittle. Therefore, the polar azo pigment is used to modify the bone powder in the present application, so as to improve the interface compatibility and adhesion between the bone powder and the organic polymer matrix, and improve the toughness and mechanical strength of the polymer material.

[0019] The bone powder has organic matter in the form of amino acid and ammonium salt on the surface, and the polar azo pigment has amino groups on the surface. The amino groups can be combined with the -NH2 on the surface of the bone powder by hydrogen bond. Under the action of Van der Waals force and hydrogen bond, the polar azo pigment is wrapped around the periphery of the bone powder. The rich nitrogen and carbon organic groups on the surface of the pigment improve the surface activity of the bone powder, which is beneficial to the uniform dispersion of the bone powder in the polar and non-polar systems, improves the interface compatibility between the bone powder and the polymer matrix, is suitable for various raw materials, and enhances the toughness, weather resistance and mechanical strength of the polymer material.

[0020] The polar azo pigment has stable azo groups and a large number of aromatic rings, has good thermal stability and heat resistance, and the degradation temperature is above 300 DEG C, which is higher than the melting processing temperature of most polymer materials. Therefore, the polar azo pigment can be used as a modifier of the bone powder.

[0021] In addition, the polar azo pigment modifies the bone powder, which is beneficial to improve the compatibility and adhesion of the bone powder and the polymer matrix interface, enhance the impact resistance and thermal stability of the polymer material, and dissolve in the polymer matrix and dye the polymer matrix. Since the color spectrum of the azo pigment molecules is more complete and wider, the coloring capacity of the azo pigment is stronger than that of the ordinary pigment. In addition, the pore size of the treated bone powder is large, and part of the pigment molecules can be adsorbed in the pores of the bone powder, and the pigment has higher thermal stability due to the protection of the barrier, and the color migration and degradation rate of the pigment is reduced, the problem of degradation and decomposition of the azo pigment at high temperature is solved, the color of the polymer material is more bright, the gloss is better, and the duration is longer.

[0022] After the bone powder is modified, it is subjected to secondary crushing and grinding, the particle size is small, the surface area is large, the adhesion points of the azo pigment molecules are more, the content of the pigment in the polymer matrix can be increased, and the coloring degree of the polymer material can be increased.

[0023] Since the pigment molecules and the bone powder are combined by hydrogen bonds and van der Waals forces, the structures of the bone powder and the pigment are not damaged, so the functions of the bone powder and the pigment are not affected.

[0024] The purpose of the present application is to provide a method for preparing a carrier-free pre-dispersed pigment color treasure with simple process, low preparation cost and stable product performance.

[0025] A method for preparing the carrier-free pre-dispersed pigment color treasure of claim 1, comprising the following steps:

[0026] S1, all raw materials are poured into a high-speed stirrer, stirred for 20 min, and a mixture I is obtained;

[0027] S2, the mixture I is poured into an extruder, preheated and double-screw circulating pushed, and a mixture II is obtained after cooling;

[0028] S3, the mixture II is placed in a air drying device to remove water, and a mixture III is obtained;

[0029] S4, the mixture III is placed in a crusher to crush, and a mixture IV is obtained;

[0030] S5, the mixture IV is placed in a grinding device for grinding, and then screened by a 1340-mesh screen, until the carrier-free pre-dispersed pigment color treasure with a particle size less than 10 microns is obtained.

[0031] In summary, the present application has the following beneficial effects compared with the prior art:

[0032] The polar azo pigment modified bone powder has an excellent organic-inorganic hybrid structure, which can strengthen the strength and toughness of the polymer material, realize the resource utilization and high-value utilization of the bone powder, and solve the problem of degradation and decomposition of the azo pigment at high temperature.

[0033] The polar azo pigment modified bone powder improves the surface activity of the bone powder, improves the interface compatibility of the bone powder and the polymer matrix, and has hydrophilicity and amphiphilicity, is suitable for various raw materials, and enhances the versatility, weather resistance and mechanical strength of the polymer material.

[0034] The polar azo pigment is carried by the bone powder to color the polymer, increases the upper limit value of the pigment content in the polymer material, and increases the coloring degree of the polymer material.

[0035] Part of the pigment molecules are adsorbed in the micropores of the bone powder and are protected by the barrier, the thermal stability of the pigment is improved, the color migration and degradation rate of the pigment are reduced, the polymer material is not easy to fade, and the color is better.

[0036] The pigment molecules and the bone powder are combined by hydrogen bonds and van der Waals forces, and the structures of the bone powder and the pigment are not damaged, so the functions of the bone powder and the pigment are not affected.

[0037] The carrier-free pre-dispersed pigment color treasure of the application has good dispersibility, is easy to produce, and has low production cost.

[0038] The above description is only a summary of the technical solutions of the application, in order to more clearly understand the technical means of the application, the content of the specification can be implemented, and in order to make the above and other purposes, characteristics and advantages of the application more obvious and easy to understand, the following preferred embodiments are described in detail as follows. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the application will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the application, not all. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the application.

[0040] First, the polar azo pigment modified bone powder is prepared according to the following steps,

[0041] S1, the polar azo pigment is weighed and dissolved in deionized water, the mass ratio of the polar azo pigment to the volume of the deionized water is 2:1, then uniform stirring is carried out at 40 DEG C constant temperature with a magnetic stirrer for 0.5h, and a polar azo pigment aqueous solution is obtained;

[0042] S2, the bone powder is weighed and slowly and uniformly poured into the azo pigment aqueous solution, stirred for 1h and then placed for 24h, a mixed slurry is obtained, and the mass ratio of the polar azo pigment to the bone powder is 50:1;

[0043] S3, repeatedly washing the mixed slurry with deionized water until the floating color is removed, then filtering, and then drying in a 100℃ air drying oven, crushing and grinding to obtain the polar azo pigment modified bone powder.

[0044] Secondly, a carrier-free pre-dispersed pigment color treasure is prepared, and the technical solutions for preparing the pigment and the dispersed color treasure of the present application are described in detail below with specific examples.

[0045] Example one

[0046] A method for preparing a carrier-free pre-dispersed pigment color treasure, comprising the following steps:

[0047] S1, 5 parts of Kline 3620 dispersant, 3 parts of 6102 dispersant, 2 parts of PETS, 3 parts of EB-FF diffusion powder, 1 part of PE wax powder, and 85 parts of polar azo pigment modified bone powder are poured into a high-speed mixer, and stirred at a stirring speed of 1000r / min for 20min to obtain a mixture one;

[0048] S2, the mixture one is poured into a screw extruder, preheated to 60℃ and subjected to double screw circulation pushing, the temperature of the screw extruder is set to 150-220℃, and the screw rotation speed is 300r / min, and after cooling, a mixture two is obtained;

[0049] S3, the mixture two is placed in a air drying device for constant temperature drying at 70℃ for 3 hours to remove water, and a mixture three is obtained;

[0050] S4, the mixture three is placed in a crusher for crushing to obtain a mixture four;

[0051] S5, the mixture four is placed in a grinding device for grinding, and then screened with a 1340 mesh screen until a carrier-free pre-dispersed pigment color treasure smaller than 10 microns is obtained.

[0052] Example two

[0053] A method for preparing a carrier-free pre-dispersed pigment color treasure, comprising the following steps:

[0054] S1, 5 parts of Kline 3620 dispersant, 3 parts of 6102 dispersant, 2 parts of PETS, 3 parts of EB-FF diffusion powder, 1 part of PE wax powder, and 85 parts of polar azo pigment modified bone powder are poured into a high-speed mixer, and stirred at a stirring speed of 1000r / min for 20min to obtain a mixture one;

[0055] S2, the mixture one is poured into a screw extruder, preheated to 60℃ and subjected to double screw circulation pushing, the temperature of the screw extruder is set to 150-220℃, and the screw rotation speed is 300r / min, and after cooling, a mixture two is obtained;

[0056] S3, the mixture two is placed into a drying device to remove water, to obtain mixture three;

[0057] S4, the mixture three is placed into a crusher to crush, to obtain mixture four;

[0058] S5, the mixture four is placed into a grinding device to grind, and then screened by a 1340-mesh screen, until a carrier-free pre-dispersed pigment color treasure smaller than 10 microns is obtained.

[0059] Example three

[0060] A method for preparing a carrier-free pre-dispersed pigment color treasure, comprising the following steps:

[0061] S1, 5 parts of M4221 dispersant, 7 parts of EBS dispersant, 2 parts of PETS, 3 parts of EB-FF diffusion powder, 6 parts of 6A wax powder, and 78 parts of polar azo pigment modified bone powder are poured into a high-speed mixer, stirred at a speed of 1000 r / min for 20 min, to obtain mixture one;

[0062] S2, the mixture one is poured into an extruder, preheated to 60 DEG C and subjected to double-screw circulation pushing, the temperature of the screw extruder is set to 150-220 DEG C, the screw rotation speed is 300 r / min, and after cooling, mixture two is obtained;

[0063] S3, the mixture two is placed into a drying device to remove water, to obtain mixture three;

[0064] S4, the mixture three is placed into a crusher to crush, to obtain mixture four;

[0065] S5, the mixture four is placed into a grinding device to grind, and then screened by a 1340-mesh screen, until a carrier-free pre-dispersed pigment color treasure smaller than 10 microns is obtained.

[0066] Example four

[0067] A method for preparing a carrier-free pre-dispersed pigment color treasure, comprising the following steps:

[0068] S1, 5 parts of M4221 dispersant, 7 parts of EBS dispersant, 2 parts of PETS, 3 parts of EB-FF diffusion powder, 6 parts of 6A wax powder, and 78 parts of polar azo pigment modified bone powder are poured into a high-speed mixer, stirred at a speed of 1000 r / min for 20 min, to obtain mixture one;

[0069] S2, the mixture one is poured into an extruder, preheated to 60 DEG C and subjected to double-screw circulation pushing, the temperature of the screw extruder is set to 150-220 DEG C, the screw rotation speed is 300 r / min, and after cooling, mixture two is obtained;

[0070] S3, the mixture two is placed into a drying device to be dried at a constant temperature of 70 DEG C for 3 hours, water is removed, and mixture three is obtained;

[0071] S4, the mixture three is placed into a crusher to be crushed, and mixture four is obtained;

[0072] S5, the mixture four is placed into a grinding device to be ground, and then screened by using a 1340-mesh screen, until the carrier-free pre-dispersed pigment color treasure smaller than 10 microns is obtained.

[0073] Example Five

[0074] A method for preparing a carrier-free pre-dispersed pigment color treasure, comprising the following steps:

[0075] S1, 6 parts of M4221 dispersant, 9 parts of EBS dispersant, 2 parts of PETS, 3 parts of EB-FF diffusion powder, 10 parts of 6A wax powder, and 72 parts of polar azo pigment modified bone powder are poured into a high-speed mixer, stirred at a stirring speed of 1000 r / min for 20 min, and mixture one is obtained;

[0076] S2, the mixture one is poured into an extruder, preheated by increasing the temperature to 60 DEG C, and double-screw circulation pushing is performed, the temperature of the screw extruder is set to be 150-220 DEG C, the screw rotation speed is 300 r / min, and mixture two is obtained after cooling;

[0077] S3, the mixture two is placed into a drying device to be dried at a constant temperature of 70 DEG C for 3 hours, water is removed, and mixture three is obtained;

[0078] S4, the mixture three is placed into a crusher to be crushed, and mixture four is obtained;

[0079] S5, the mixture four is placed into a grinding device to be ground, and then screened by using a 1340-mesh screen, until the carrier-free pre-dispersed pigment color treasure smaller than 10 microns is obtained.

[0080] The following table is the specific components and values of three experiments, and the physical properties of the plastic made of the carrier-free pre-dispersed pigment color treasure, and the following data is obtained by measurement.

[0081]

[0082] The above data can prove that the pigment and dispersant color treasure described in the application can improve the mechanical strength of the plastic product to a certain extent, has good dispersibility, and can improve the pigment content in the plastic.

[0083] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not intended to limit the present application; although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions recorded in the above embodiments can be modified, or some or all of the technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A carrier-free pre-dispersed pigment colorant, characterized in that, The raw materials include the following ingredients by weight: 8-15 parts of dispersant, 3 parts of diffusion powder, 2 parts of pigment diluent, 1-5 parts of wax powder, 72-85 parts of polar azo pigment modified bone powder; The preparation method of the polar azo pigment modified bone powder specifically includes the following steps: S1, weigh the polar azo pigment and dissolve it in deionized water, the mass ratio of the polar azo pigment to the volume of deionized water is 2:1, then uniformly stir it at 40°C with a magnetic stirrer for 0.5h to obtain a polar azo pigment aqueous solution; S2, weigh the bone powder and slowly pour it into the azo pigment aqueous solution, stir for 1h and then stand for 24h to obtain a mixed slurry, the mass ratio of the polar azo pigment to the bone powder is 50:1; S3, repeatedly wash the mixed slurry with deionized water until the floating color is removed, then filter, put it into a 100°C air drying oven for drying, crush and grind to obtain a polar azo pigment modified bone powder. The preparation method of the carrier-free pre-dispersed pigment color treasure includes the following steps:

2. A process for the preparation of the carrier-free pre-dispersed pigment color pearls according to claim 1, characterized in that S1, pour all the raw materials into a high-speed blender and stir for 20min to obtain a mixture one; S2, pour the mixture one into an extruder, preheat and double-screw circular push, cool to obtain a mixture two; S3, put the mixture two into an air drying device to remove water to obtain a mixture three; S4, put the mixture three into a crusher to crush to obtain a mixture four; S5, put the mixture four into a grinding device to grind, then screen it with a 1340-mesh screen until a carrier-free pre-dispersed pigment color treasure with a diameter less than 10 microns is obtained. ​

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