CN112920490A - High-tinting-strength flame-retardant general color master batch and preparation method thereof - Google Patents
High-tinting-strength flame-retardant general color master batch and preparation method thereof Download PDFInfo
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- C08K9/04—Ingredients treated with organic substances
Abstract
The invention discloses a high-tinting-strength flame-retardant general color master batch and a preparation method thereof, and relates to the technical field of high polymer materials. The invention discloses a high-tinting-strength flame-retardant general color master batch which is composed of the following raw materials in parts by weight: 30-60 parts of modified PE/EVA carrier, 5-18 parts of ionomeric wax-EBS composite dispersant, 10-60 parts of colorant, 10-40 parts of composite flame retardant and 2-5 parts of talcum powder, wherein the modified PE/EVA carrier is a diatomite modified PE/EVA composite material. The flame-retardant general color master batch with high tinting strength provided by the invention has good tinting property and flame retardance, excellent compatibility and dispersibility among the components of the color master batch, uniform color of the color master batch, wide application range of the color master batch, suitability for general resin, suitability for engineering plastics, and good mechanical property of plastic products while ensuring good tinting effect and flame retardance of the plastic products.
Description
Technical Field
The invention belongs to the technical field of high polymer materials, and particularly relates to a high-tinting-strength flame-retardant universal color master batch and a preparation method thereof.
Background
In the preparation process of the existing plastic product, the color master batch is usually added for coloring, and along with the continuous development of the color master batch, the color master batch can be added with colors, and some special properties of the material, such as flame retardance, antistatic property, weather resistance, aging resistance and the like, can be improved. The color master batches are divided into general color master batches and special color master batches, the general color master batches can be suitable for other resins except carrier resins, but the predictability of the coloring effect is poor, the strength and the toughness of plastic products are influenced, and the required pigment has high requirement, so that the cost is higher; the special color master batch is selected from the same or good-compatibility carrier as a plastic product appointed by a user, has good compatibility with the natural color resin in the plastic product, is uniform and stable in coloring, and can improve the quality of the plastic product.
The current universal color master batch usually adopts low-melting-point PE as a carrier, can be suitable for coloring other resins except for carrier resin thereof, but has narrow application range and good technical index and economic benefit, mainly because the compatibility between the universal color master batch carrier and plastic resin is poor and the effect of no special color master batch is good, the pigment is not uniformly dispersed in the plastic resin, and the coloring effect and the color are not uniform; the dispersibility and the colorability of the pigment in the color master batch carrier also influence the coloring uniformity and the appearance quality of the plastic product; the compatibility of the universal color master batch carrier is poor, and the mechanical property of the plastic product is easily influenced, so that the quality of the plastic product is poor. Along with the rapid development of society, in order to ensure the personal safety of people, the existing plastic products all need to have better flame-retardant and fireproof performance, so that the development of the flame-retardant general color master batch with wide application range and high tinting strength becomes the research and development trend of various plastic product manufacturers, meets the requirements of people on appearance, cost and flame-retardant performance, and can ensure the mechanical performance of the plastic products.
Disclosure of Invention
The invention aims to provide the flame-retardant general color master batch with high tinting strength, the color master batch has excellent compatibility and dispersibility among all components, the color master batch has uniform color and good tinting property and flame retardance, the color master batch has wide application range, can be suitable for general resin and engineering plastics, and can ensure that the plastic products have good mechanical property while ensuring good tinting effect and flame retardance of the plastic products.
In order to realize the purpose of the invention, the invention provides a flame-retardant universal color master batch with high tinting strength, which is prepared from the following raw materials in parts by weight: 30-60 parts of modified PE/EVA carrier, 5-18 parts of ionomeric wax-EBS composite dispersant, 10-60 parts of colorant, 10-40 parts of composite flame retardant and 2-5 parts of talcum powder, wherein the modified PE/EVA carrier is a diatomite modified PE/EVA composite material.
Further, the preparation method of the modified PE/EVA carrier specifically comprises the following steps:
s1, kieselguhr pretreatment: grinding the diatomite in a ball mill until the particle size is smaller than 10 mu m, adding the ground diatomite into hydrochloric acid with the mass fraction of 60%, stirring for 2-4h at the temperature of 80-90 ℃, filtering, washing and drying to obtain the pretreated diatomite.
S2, placing the pretreated diatomite in a high-speed kneader, spraying isopropanol and titanate coupling agent NDZ-201 in a mass ratio of 3:1 in a mist mode under the condition of high-speed stirring, heating to 100 ℃, and continuing stirring for 15-30min to obtain the modified diatomite.
S3, placing polyethylene and EVA in a high-speed stirrer, adding hydroxyethyl methacrylate, heating to 90-110 ℃, stirring for 2-3h, adding the modified diatomite, cooling to 50-70 ℃, stirring for 30min, taking out, placing in a double-screw extruder, and performing extrusion granulation to obtain the modified PE/EVA carrier.
Further, the EVA has a vinyl acetate content of 26-35%, and a melt index of 20-400g/10min, measured at 190 ℃ and 2.16 kg.
Further, the mass ratio of the pretreated diatomite to the titanate coupling agent NDZ-201 is (8-15): 1.
Further, the mass ratio of the polyethylene to the EVA to the hydroxyethyl methacrylate is 2: (0.8-1.5): (0.1-0.3), wherein the mass ratio of the polyethylene to the modified diatomite is 1: (1-1.5).
Further, the ionomeric wax-EBS composite dispersant is compounded by ionomeric wax and EBS, and the preparation method specifically comprises the following steps: adding EAA wax and calcium carbonate into a NaOH solution with the mass concentration of 12%, uniformly stirring, heating to 160-180 ℃, reacting for 10-15min at the rotating speed of 80r/min, performing suction filtration, washing with water, and drying to obtain ionomer wax; placing the ionomer wax, the DCP and the EBS in a blender, heating to 60 ℃, and stirring at the speed of 180r/min for 15-30min to prepare the ionomer wax-EBS composite dispersant. The mass ratio of the EAA wax to the calcium carbonate is 1: (0.1-0.3), wherein the mass ratio of the ionomeric wax to the DCP to the EBS is 2: (0.03-0.04): (1-1.3).
Further, the preparation method of the composite flame retardant specifically comprises the following steps: adding PEG and urea in a mass ratio of 2:1 into dichloromethane, heating to 80-100 ℃, stirring for 30min, adding aluminum hypophosphite, reacting for 2h, cooling, filtering, washing with deionized water, drying, and crushing to obtain the composite flame retardant.
Further, the mass ratio of the PEG to the aluminum hypophosphite is 2: (0.5-1.5), wherein the mass ratio of the PEG to the dichloromethane is 1: (2.5-3).
The preparation method of the flame-retardant general color master batch with high tinting strength comprises the following steps:
(1) weighing the required raw materials in parts by weight, adding the modified PE/EVA carrier and the colorant into a mixer, stirring at a high speed of 260-350r/min for 5-8min, heating to 50-60 ℃, adding the composite flame retardant and the ionomeric wax-EBS composite dispersant, stirring at a high speed of 300-360r/min for 30min to obtain a mixture.
(2) And (3) uniformly mixing the mixture and the talcum powder, adding the mixture into a screw extruder, setting the temperature of the screw extruder at 220 ℃ and the screw rotation speed at 360r/min for extrusion granulation, and preparing the flame-retardant general color master batch with high tinting strength.
The invention achieves the following beneficial effects:
1. the invention adopts diatomite modified PE/EVA composite material as a carrier of color master batch, and the diatomite is firstly ground and then subjected to acid treatment to remove impurities in micropores of the diatomite to obtain SiO2The high-precision diatomite with the content of more than 94 percent increases the porosity of the diatomite and improves the specific surface area and the adsorptivity of the diatomite; and then, the surface of the pretreated diatomite is modified by adopting a diluted titanic acid coupling agent, so that the surface activity of the diatomite is increased, the interface bonding force of the diatomite and a PE/EVA composite material is improved, the diatomite can be better compatible with the PE/EVA composite material, the specific surface area and the adsorptivity of a modified PE/EVA carrier are improved, the pigment can be better compatible with the modified PE/EVA carrier, the colorability of the modified PE/EVA carrier is improved, and the pigment is not easy to separate out from color master batches. The PE/EVA composite material improves the mechanical strength and toughness of the modified PE/EVA carrier through the modification of diatomite, and further improves the mechanical property and toughness of the color master batch plastic product.
2. The color master batch carrier adopts a PE/EVA composite material as a matrix, PE (polyethylene) is a polar polymer, EVA (ethylene-vinyl acetate copolymer) is nonpolar polymerizability, and PE and EVA are reacted and crosslinked through hydroxyethyl methacrylate at high temperature to prepare the PE/EVA composite material which contains polar groups and nonpolar groups, so that the PE/EVA composite material has excellent compatibility with polar or nonpolar plastic resins, thereby improving the application range of the general color master batch, and the color master batch carrier is applicable to general resins and also applicable to engineering plastics. The PE/EVA composite material is modified by diatomite, so that the mechanical property of the universal color master batch is improved, and the mechanical quality of a plastic product is ensured. The invention adopts EVA with 26-35% of vinyl acetate content, improves the compatibility of the universal color master batch and the plastic resin, and improves the coloring effect of the pigment.
3. The dispersant is compounded by ionomeric wax and Ethylene Bis Stearamide (EBS), wherein the ionomeric wax is prepared by reacting EAA wax (ethylene acrylic acid copolymer wax) with calcium carbonate in an alkaline solution, so that calcium ions are introduced into the EAA wax, the polarity of the dispersant is increased, the dispersing effect is better, and the coloring effect is improved; EBS is a dispersant containing polar groups and non-polar groups, has excellent dispersant for organic pigments or inorganic pigments and has good tinting strength for modified PE/EVA carriers. According to the invention, the ionomer wax and the EBS are subjected to cross-linking reaction under the action of the DCP, the generated compound has better dispersion effect than a single component or a simple mixture of the single component and the EBS, the dispersibility of the pigment in the color master batch is greatly improved, the tinting strength is obviously improved, and the strength of the color master batch is improved to a certain extent, so that the color uniformity of the color master batch plastic product is further ensured, the compatibility between the color master batch and the plastic product is increased, and the mechanical property of the plastic product is improved.
3. The composite flame retardant prepared by reacting PEG and urea with aluminum hypophosphite (ALHP) under the action of dichloromethane has excellent flame retardance, has a better flame retardance effect than a flame retardant prepared from a single component or a compound of the single component and the aluminum hypophosphite, can improve the compatibility of the flame retardant with other components in a color master batch, and ensures that the mechanical property of the color master batch is not influenced.
4. The ionomeric wax-EBS composite dispersant disclosed by the invention also has excellent lubricity, can be mutually synergistic with talcum powder, improves the processability of the color master batch, ensures the quality of the color master batch, further improves the processability of plastic products and ensures the quality of the plastic products.
5. The invention adopts diatomite modified PE/EVA composite material as a color master batch carrier, and prepares the flame-retardant general color master batch with high tinting strength by adding the ionomeric wax-EBS composite dispersant, the colorant, the composite flame retardant and the like for modification. The composite flame retardant greatly improves the flame retardance of the color master batch, so that the plastic product has the flame-retardant and fireproof functions, the fireproof performance of the plastic product is improved, the safe evacuation of people in fire can be ensured, and the people are protected from the invasion of spreading fire.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The titanate coupling agent NDZ-201 used in the invention is isopropyl tri (dioctyl pyrophosphato acyloxy) titanate which is produced by Kunshan sandan Biotech Limited and is D1 UL.
The PE in the embodiment of the invention is low-density polyethylene provided by Shanghai super-spinning chemical industry, and the type of the PE is MB 9500.
The colorant used in the invention is an organic pigment or an inorganic pigment, wherein the particle size of the organic pigment is not more than 0.1 μm, and the particle size of the inorganic pigment is not more than 0.5 μm. The organic pigment used in the examples below was Craine pigment Brilliant Red L4B01 and the inorganic pigment was a BASF Sicotan K1010 FG inorganic pigment.
The flame-retardant universal color master batch with high tinting strength of the invention is described below with reference to specific examples.
Example 1
A preparation method of a flame-retardant general color master batch with high tinting strength comprises the following steps: adding 42 parts of modified PE/EVA carrier and 46 parts of Baohong L4B01 into a mixer, stirring at a stirring speed of 350r/min for 7min, heating to 60 ℃, adding 18 parts of composite flame retardant and 10 parts of ionomeric wax-EBS composite dispersant, and stirring at a stirring speed of 300r/min for 30min to obtain a mixture; and (3) uniformly mixing the mixture and the talcum powder, adding the mixture into a screw extruder, setting the temperature of the screw extruder to be 160-220 ℃, and carrying out extrusion granulation at the screw rotating speed of 300r/min to obtain the flame-retardant general color master batch with high tinting strength.
The modified PE/EVA carrier is a diatomite modified PE/EVA composite material, and the preparation method specifically comprises the following steps:
s1, kieselguhr pretreatment: and grinding the diatomite in a ball mill until the particle size is less than 10 mu m, adding the ground diatomite into hydrochloric acid with the mass fraction of 60%, stirring for 4 hours at the temperature of 80 ℃, filtering, washing and drying to obtain the pretreated diatomite.
S2, placing 120 parts of the pretreated diatomite in a high-speed kneader, spraying a mixture of 30 parts of isopropanol and 10 parts of titanate coupling agent NDZ-201 after mixing in a mist manner under high-speed stirring, heating to 100 ℃, and continuing stirring for 30min to obtain the modified diatomite.
S3, placing 20 parts of polyethylene and 15 parts of EVA into a high-speed stirrer, then adding 2 parts of hydroxyethyl methacrylate, heating to 100 ℃, stirring for 3 hours, then adding 22 parts of modified diatomite, cooling to 60 ℃, stirring for 30 minutes, taking out, placing into a double-screw extruder, and carrying out extrusion granulation to obtain the modified PE/EVA carrier. The EVA had a vinyl acetate content of 32% and a melt index of 150g/10min, measured at 190 ℃ and 2.16 kg.
The ionomeric wax-EBS composite dispersant is compounded by ionomeric wax and EBS, and the preparation method specifically comprises the following steps: adding 10 parts of EAA wax and 2 parts of calcium carbonate into a NaOH solution with the mass concentration of 12%, uniformly stirring, heating to 180 ℃, reacting for 12min at the rotating speed of 80r/min, performing suction filtration, washing with water, and drying to obtain ionomer wax; and (3) placing 20 parts of ionomer wax, 0.4 part of DCP and 12 parts of EBS in a mixer, heating to 60 ℃, and stirring at the speed of 180r/min for 30min to prepare the ionomer wax-EBS composite dispersant.
The preparation method of the composite flame retardant specifically comprises the following steps: adding 20 parts of PEG and 10 parts of urea in a mass ratio into 60 parts of dichloromethane, heating to 100 ℃, stirring for 30min, adding 15 parts of aluminum hypophosphite, reacting for 2h, cooling, filtering, washing with deionized water, drying and crushing to obtain the composite flame retardant.
The flame-retardant color master batch prepared in the embodiment is prepared by mixing the following components in a mass ratio of 1: 25 into a polystyrene base material, and the prepared polystyrene plastic product has uniform color, the flame retardant grade of V-1, the tensile strength of 42MPa, the bending strength of 48.6MPa and the elongation at break of 32.1 percent.
Example 2
A preparation method of a flame-retardant general color master batch with high tinting strength comprises the following steps: adding 30 parts of modified PE/EVA carrier and 20 parts of K1010 FG into a mixer, stirring for 8min at a stirring speed of 320r/min, heating to 60 ℃, adding 25 parts of composite flame retardant and 15 parts of ionomer wax-EBS composite dispersant, and stirring for 30min at a stirring speed of 320r/min to obtain a mixture; and (3) uniformly mixing the mixture and the talcum powder, adding the mixture into a screw extruder, setting the temperature of the screw extruder to be 160-220 ℃, and carrying out extrusion granulation at the screw rotating speed of 300r/min to obtain the flame-retardant general color master batch with high tinting strength.
The preparation method of the modified PE/EVA carrier is the same as that of example 1, except that the amount of the pretreated diatomaceous earth is 100 parts, the amount of EVA is 8 parts, the amount of hydroxyethyl methacrylate is 1 part, and the amount of the modified diatomaceous earth is 20 parts. The EVA had a vinyl acetate content of 26% and a melt index of 350g/10min, measured at 190 ℃ and 2.16 kg.
The preparation method of the ionomeric wax-EBS composite dispersant is the same as that in example 1, except that the mass ratio of EAA wax to calcium carbonate in this example is 10: 1, the mass ratio of the ionomeric wax to the DCP to the EBS is 2: 0.03: 1.
the preparation method of the composite flame retardant comprises the following steps: adding 20 parts of PEG and 10 parts of urea into 50 parts of dichloromethane, heating to 80 ℃, stirring for 30min, adding 5 parts of aluminum hypophosphite, reacting for 2h, cooling, filtering, washing with deionized water, drying, and crushing to obtain the composite flame retardant.
The flame-retardant color master batch prepared in the embodiment is prepared by mixing the following components in a mass ratio of 1: 25 into the base material of the polyvinyl chloride plastic, the prepared polyvinyl chloride plastic product has uniform color, the flame retardant grade of V-0, the tensile strength of 72.5MPa, the bending strength of 90.4MPa and the elongation at break of 39.8 percent.
Example 3
A preparation method of a flame-retardant general color master batch with high tinting strength comprises the following steps: adding 60 parts of modified PE/EVA carrier and 58 parts of K1010 FG into a mixer, stirring for 8min at a stirring speed of 320r/min, heating to 60 ℃, adding 10 parts of composite flame retardant and 15 parts of ionomer wax-EBS composite dispersant, and stirring for 30min at a stirring speed of 320r/min to obtain a mixture; and (3) uniformly mixing the mixture and the talcum powder, adding the mixture into a screw extruder, setting the temperature of the screw extruder to be 160-220 ℃, and carrying out extrusion granulation at the screw rotating speed of 300r/min to obtain the flame-retardant general color master batch with high tinting strength.
The preparation method of the modified PE/EVA carrier is the same as that of example 1, except that the amount of the pretreated diatomaceous earth is 150 parts, the amount of EVA is 15 parts, the amount of hydroxyethyl methacrylate is 3 parts, and the amount of the modified diatomaceous earth is 30 parts. The EVA had an ethylene acetate content of 35% and a melt index of 80g/10min, measured at 190 ℃ and 2.16 kg.
The preparation method of the ionomeric wax-EBS composite dispersant is the same as that in example 1, except that the mass ratio of EAA wax to calcium carbonate in this example is 10: 3, the mass ratio of the ionomeric wax to the DCP to the EBS is 2: 0.4: 1.3.
the preparation method of the composite flame retardant comprises the following steps: adding 20 parts of PEG and 10 parts of urea into 52 parts of dichloromethane, heating to 100 ℃, stirring for 30min, adding 15 parts of aluminum hypophosphite, reacting for 2h, cooling, filtering, washing with deionized water, drying, and crushing to obtain the composite flame retardant.
The flame-retardant color master batch prepared in the embodiment is prepared by mixing the following components in a mass ratio of 1: 25 is added into a base material of the polyformaldehyde plastic, and the prepared polyformaldehyde plastic product has the advantages of uniform color, flame retardant rating of V-1, tensile strength of 80.6MPa, bending strength of 88.1MPa and elongation at break of 20.4 percent.
Example 4
A preparation method of a flame-retardant general color master batch with high tinting strength comprises the following steps: adding 51 parts of modified PE/EVA carrier and 16 parts of Baohong L4B01 into a mixer, stirring at a stirring speed of 260r/min for 8min, heating to 60 ℃, adding 38 parts of composite flame retardant and 18 parts of ionomeric wax-EBS composite dispersant, and stirring at a stirring speed of 320r/min for 30min to obtain a mixture; and (3) uniformly mixing the mixture and the talcum powder, adding the mixture into a screw extruder, setting the temperature of the screw extruder to be 160-220 ℃, and carrying out extrusion granulation at the screw rotating speed of 360r/min to obtain the flame-retardant general color master batch with high tinting strength.
The preparation method of the modified PE/EVA carrier is the same as that of example 1, except that 134 parts of pretreated diatomite, 10 parts of EVA, 2 parts of hydroxyethyl methacrylate and 26 parts of modified diatomite are used in this example. The EVA had an ethylene acetate content of 35% and a melt index of 80g/10min, measured at 190 ℃ and 2.16 kg.
The preparation method of the ionomeric wax-EBS composite dispersant is the same as that in example 1, except that the mass ratio of EAA wax to calcium carbonate in this example is 10: 3, the mass ratio of the ionomeric wax to the DCP to the EBS is 2: 0.3: 1.1.
the preparation method of the composite flame retardant comprises the following steps: adding 20 parts of PEG and 10 parts of urea into 55 parts of dichloromethane, heating to 90 ℃, stirring for 30min, adding 30 parts of aluminum hypophosphite, reacting for 2h, cooling, filtering, washing with deionized water, drying, and crushing to obtain the composite flame retardant.
The flame-retardant color master batch prepared in the embodiment is prepared by mixing the following components in a mass ratio of 1: 25 into the base material of polyamide plastic, the prepared PA66 plastic product has uniform color, flame retardant rating of V-1, tensile strength of 76.3MPa, bending strength of 108.9MPa and elongation at break of 97.2 percent.
Comparative example 1
A universal color masterbatch was prepared with the same composition, materials and preparation method as in example 1, except that no diatomaceous earth was added in this comparative example.
Comparative example 2
The composition, raw materials and preparation method of the universal color master batch are the same as those in example 1, and the only difference is that the flame retardant in the comparative example is aluminum hypophosphite.
Comparative example 3
A universal color masterbatch was prepared in the same manner as in example 1 except that the dispersant in this comparative example was an ionomeric wax.
The color masterbatches prepared in the above examples 1 to 4 and comparative examples 1 to 3 were subjected to mechanical property tests, and the test results are shown in table 1 below.
Table 1 color master batch mechanical property test result table
The detection results in table 1 show that the mechanical properties of the PE/EVA composite material of the present invention are improved to a certain extent by modification with diatomaceous earth, and the dispersibility of the components of the color masterbatch can be improved by addition of the ionomer wax-EBS composite dispersant, and the mechanical properties of the color masterbatch can be improved to a certain extent.
The color concentrates prepared in the above examples 1 to 4 and comparative examples 1 to 3 were subjected to coloring effect and flame retardancy tests, and the test results are shown in the following table 2.
TABLE 2 color masterbatch coloring effect and flame retardancy test results table
| Uniformity of color | Dispersibility | Flame retardant rating | Oxygen index | |
| Example 1 | Uniformity | Colorless dot | V-0 | 32 |
| Example 2 | Uniformity | Colorless dot | V-0 | 34 |
| Example 3 | Uniformity | Colorless dot | V-0 | 36 |
| Example 4 | Uniformity | Colorless dot | V-0 | 30 |
| Comparative example 1 | Slightly flow pattern | Slightly colored point | V-1 | 22 |
| Comparison ofExample 2 | Uniformity | Colorless dot | V-1 | 19 |
| Comparative example 3 | Slightly flow pattern | Slightly colored point | V-0 | 26 |
According to the comparative test results in the table 2, it can be seen that the flame retardant property of the color master batch is obviously improved after the composite flame retardant is added; the addition of the diatomite and the ionomeric wax-EBS composite dispersant improves the dispersibility of the pigment, the color of the color master batch is uniform, and the colorability of the color master batch is improved.
The technical features of the embodiments described above can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.
Claims (10)
1. The flame-retardant general color master batch with high tinting strength is characterized by comprising the following raw materials in parts by weight: 30-60 parts of modified PE/EVA carrier, 5-18 parts of ionomeric wax-EBS composite dispersant, 10-60 parts of colorant, 10-40 parts of composite flame retardant and 2-5 parts of talcum powder, wherein the modified PE/EVA carrier is a diatomite modified PE/EVA composite material.
2. The high tinting strength flame retardant universal color masterbatch according to claim 1, wherein the preparation method of the modified PE/EVA carrier specifically comprises the following steps:
s1, kieselguhr pretreatment: grinding diatomite in a ball mill until the particle size is smaller than 10 mu m, adding the ground diatomite into hydrochloric acid with the mass fraction of 60%, stirring for 2-4h at the temperature of 80-90 ℃, filtering, washing and drying to obtain pretreated diatomite;
s2, placing the pretreated diatomite in a high-speed kneader, spraying isopropanol and titanate coupling agent NDZ-201 in a mass ratio of 3:1 in a mist form under high-speed stirring, heating to 100 ℃, and continuing stirring for 15-30min to obtain modified diatomite;
s3, placing polyethylene and EVA in a high-speed stirrer, adding hydroxyethyl methacrylate, heating to 90-110 ℃, stirring for 2-3h, adding the modified diatomite, cooling to 50-70 ℃, stirring for 30min, taking out, placing in a double-screw extruder, and performing extrusion granulation to obtain the modified PE/EVA carrier.
3. The high tinting strength flame retardant color masterbatch according to claim 2 wherein the EVA has a vinyl acetate content of 26-35% and a melt index of 20-400g/10min measured at 190 ℃ and 2.16 kg.
4. The high tinting strength flame retardant universal color masterbatch according to claim 2 wherein the mass ratio of the pretreated diatomaceous earth to the titanate coupling agent NDZ-201 is (8-15): 1.
5. The high tinting strength flame retardant universal color masterbatch according to claim 2, wherein the mass ratio of the polyethylene, the EVA and the hydroxyethyl methacrylate is 2: (0.8-1.5): (0.1-0.3), wherein the mass ratio of the polyethylene to the modified diatomite is 1: (1-1.5).
6. The high-tinting-strength flame-retardant universal color master batch according to claim 1, wherein the ionomeric wax-EBS composite dispersant is compounded by ionomeric wax and EBS, and the preparation method specifically comprises the following steps: adding EAA wax and calcium carbonate into a NaOH solution with the mass concentration of 12%, uniformly stirring, heating to 160-180 ℃, reacting for 10-15min at the rotating speed of 80r/min, performing suction filtration, washing with water, and drying to obtain ionomer wax; placing the ionomer wax, the DCP and the EBS in a blender, heating to 60 ℃, and stirring at the speed of 180r/min for 15-30min to prepare the ionomer wax-EBS composite dispersant.
7. The high tinting strength flame retardant universal color masterbatch according to claim 6, wherein the EAA wax and calcium carbonate are present in a mass ratio of 1: (0.1-0.3), wherein the mass ratio of the ionomeric wax to the DCP to the EBS is 2: (0.03-0.04): (1-1.3).
8. The high-tinting-strength flame-retardant universal color masterbatch according to claim 1, wherein the preparation method of the composite flame retardant specifically comprises the following steps: adding PEG and urea in a mass ratio of 2:1 into dichloromethane, heating to 80-100 ℃, stirring for 30min, adding aluminum hypophosphite, reacting for 2h, cooling, filtering, washing with deionized water, drying, and crushing to obtain the composite flame retardant.
9. The high tinting strength flame retardant universal color masterbatch according to claim 8, wherein the mass ratio of PEG to aluminum hypophosphite is 2: (0.5-1.5), wherein the mass ratio of the PEG to the dichloromethane is 1: (2.5-3).
10. A method for preparing a high tinting strength flame retardant universal color masterbatch according to claims 1-9, comprising the following steps:
(1) weighing the required raw materials according to the parts by weight, adding the modified PE/EVA carrier and the colorant into a mixer, stirring at a high speed of 260-350r/min for 5-8min, heating to 50-60 ℃, adding the composite flame retardant and the ionomeric wax-EBS composite dispersant, stirring at a high speed of 300-360r/min for 30min to obtain a mixture;
(2) and (3) uniformly mixing the mixture and the talcum powder, adding the mixture into a screw extruder, setting the temperature of the screw extruder to be 160-220 ℃, and performing extrusion granulation to prepare the flame-retardant general color master batch with high tinting strength.
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