CN115926249A - Composite powder and preparation method thereof, resin modified master batch and preparation method and application thereof - Google Patents
Composite powder and preparation method thereof, resin modified master batch and preparation method and application thereof Download PDFInfo
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- CN115926249A CN115926249A CN202310008826.1A CN202310008826A CN115926249A CN 115926249 A CN115926249 A CN 115926249A CN 202310008826 A CN202310008826 A CN 202310008826A CN 115926249 A CN115926249 A CN 115926249A
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Abstract
The invention belongs to the technical field of resin modification, and particularly relates to a composite powder and a preparation method thereof, and a resin modified master batch and a preparation method and application thereof. The invention uses talcum powder and wollastonite in a compounding way, can generate a compound synergistic effect, the obtained compound powder has good processing fluidity, and the talcum powder and the wollastonite added with the compound powderThe impact strength, the elongation at break and the elastic modulus of the resin are all fundamentally improved; the invention solves the problems of low whiteness and poor toughness of the black talc by calcination, and the whiteness and the toughness of the calcined black talc are improved to reach the standard of more than one grade of talc powder; the invention removes impurities in the wollastonite by calcining, improves the length-diameter ratio of the wollastonite, and converts the crystal form into the high-temperature beta-CaSiO 3 The fiber structure plays a role of a framework, and the toughness of the product is effectively improved; according to the invention, the composite powder is activated and modified by spraying and mixing and utilizing the silane coupling agent aqueous solution, the activation coating rate can reach more than 99%, and the crosslinking effect is stable.
Description
Technical Field
The invention belongs to the technical field of resin modification, and particularly relates to a composite powder and a preparation method thereof, and a resin modified master batch and a preparation method and application thereof.
Background
The HDPE corrugated pipe has a corrugated outer wall and a smooth inner wall, is a common municipal pipeline, has the advantages of material saving, high rigidity, excellent bending property and the like, and can save 40% of material compared with a common pipe with the same specification and the same strength. Since the HDPE corrugated pipe needs to be buried underground, the requirements on the mechanical properties of the product, such as high impact resistance, high compression resistance, etc., are high, and the price of the HDPE resin is continuously increased. Many enterprises have tried to effectively control the product cost on the basis of ensuring the original quality of HDPE corrugated pipes.
Some enterprises modify HDPE resin by fillers, and talc powder and wollastonite are commonly used. The talcum powder has excellent self-lubricating effect and processing performance due to the sheet structure, the rigidity of the product can be effectively improved when the talcum powder is added into HDPE corrugated pipe resin, but the large amount of talcum powder is easily bridged, a screw rod slips, and the cost of the high-quality talcum powder with the good sheet structure is very high. Wollastonite has a needle-like structure, so that the toughness of the product can be effectively improved, but the hardness of the product is higher, and the product is difficult to process.
In view of the above, how to improve the mechanical properties and processability of HDPE resins at low cost is an ongoing problem for those skilled in the art.
Disclosure of Invention
The invention aims to provide composite powder and a preparation method thereof, and a resin modified master batch and a preparation method and application thereof.
In order to achieve the above purpose, the invention provides the following technical scheme:
the invention provides a preparation method of composite powder, which comprises the following steps:
(1) Mixing black talc, wollastonite and a dispersing agent, and sequentially grinding and calcining to obtain a sintered material;
(2) And (3) carrying out spray mixing on the sintering material and a silane coupling agent aqueous solution, and then modifying to obtain the composite powder.
Preferably, the content of silicon dioxide in the black talc is not less than 55wt%, and the particle size is 5-10 cm;
the length-diameter ratio of the wollastonite is not lower than 10, and the particle size is 4-6 cm.
Preferably, the mass ratio of the black talc to the wollastonite is 1;
the mass ratio of the total mass of the black talc and the wollastonite to the mass of the dispersing agent is 100;
the mass ratio of the sintering material to the silane coupling agent in the silane coupling agent aqueous solution is 100: 0.6-1;
the concentration of the silane coupling agent aqueous solution is 16.6-25 wt%.
Preferably, the calcining temperature is 1130-1170 ℃, and the heat preservation time is 20-30 min;
the temperature of the modification is 100-120 ℃, and the heat preservation time is 10-15 min.
The invention also provides the composite powder obtained by the preparation method of the scheme,d of the composite powder 50 Is 7-8 μm.
The invention also provides a resin modified master batch which is prepared from the following raw materials in parts by mass:
the composite powder is the composite powder in the scheme.
Preferably, the complex antioxidant comprises antioxidant 1010 and antioxidant 168.
The invention also provides a preparation method of the resin modified master batch, which comprises the following steps:
(1) Premixing the composite powder, zinc stearate, polyethylene wax and titanate coupling agent to obtain a premix;
(2) And mixing the premix, the composite antioxidant, the HDPE resin and the LLDPE resin, and then extruding and granulating to obtain the resin modified master batch.
Preferably, the processing temperature of the extrusion granulation is 170 to 200 ℃.
The invention also provides application of the resin modified master batch in the scheme or the resin modified master batch prepared by the preparation method in the scheme in modification of HDPE resin.
The invention provides a preparation method of composite powder. According to the invention, the talcum powder and the wollastonite are compounded for use, so that respective defects of the talcum powder and the wollastonite can be effectively avoided, a compound synergistic effect is generated, the obtained compound powder has good processing flowability, the impact strength, the elongation at break and the elastic modulus of the resin added with the compound powder are all fundamentally improved, and the problem of insufficient mechanical properties of the material obtained by adding the powder with a high amount singly is solved; in addition, the invention takes the talcum powder and the wollastonite as raw materials for grinding, the talcum powder and the wollastonite can avoid slipping by self friction, and the production efficiency is effectively improved by 8-10%.
The invention solves the problems of low whiteness and poor toughness of the black talc by calcination, and the whiteness and the toughness of the calcined black talc are improved to more than one grade of talcStandard; the invention removes the impurities similar to calcium carbonate in the wollastonite by calcining, the length-diameter ratio of the wollastonite is improved, and the crystal form is from a low-temperature state alpha-CaSiO 3 Conversion to high temperature state beta-CaSiO 3 The obtained fibrous structure of the wollastonite can play a skeleton role, so that the toughness of the product is effectively improved.
The invention utilizes the silane coupling agent aqueous solution to activate the composite powder by spraying and mixing, can obtain the best activation effect, the activation coating rate can reach more than 99 percent, the silane coupling agent can also be utilized to the maximum extent, one end of the silane coupling agent reacts with the silanol group on the surface of the composite powder to generate a covalent bond, and the other end of the silane coupling agent can generate a covalent bond with the resin, thereby combining two different materials, and having high coating rate and stable crosslinking effect.
The invention also provides the composite powder obtained by the preparation method in the scheme, and D of the composite powder 50 Is 7-8 μm. The composite powder provided by the invention has good processing fluidity, the impact strength, the elongation at break and the elastic modulus of the resin added with the composite powder are all fundamentally improved, and the problem of insufficient mechanical properties of the material obtained by single high-addition-amount powder is solved.
The invention also provides a resin modified master batch. The resin modified master batch provided by the invention can obviously improve the mechanical property and the processing property of the HDPE resin, and has low cost and good social benefit and economic benefit.
The invention also provides a preparation method of the resin modified master batch. The preparation method provided by the invention has the advantages of simple steps, convenience in operation and no pollution to the environment.
The invention also provides the application of the resin modified master batch in the scheme or the resin modified master batch prepared by the preparation method in the scheme in modification of HDPE resin. The resin modified master batch provided by the invention is particularly suitable for modification of HDPE resin, can obviously improve the mechanical property and the processing property of the HDPE resin, and has a certain modification effect on other resins.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a process flow diagram of the present invention for preparing a resin modified master batch;
FIG. 2 is a scanning electron microscope image of the composite powder prepared in example 1 of the present invention under different magnifications.
Detailed Description
The invention provides a preparation method of composite powder, which comprises the following steps:
(1) Mixing black talc, wollastonite and a dispersing agent, and sequentially grinding and calcining to obtain a sintered material;
(2) And (3) carrying out spray mixing on the sintering material and a silane coupling agent aqueous solution, and then modifying to obtain the composite powder.
According to the invention, black talc, wollastonite and a dispersing agent are mixed and sequentially ground and calcined to obtain a sintering material. In the present invention, the silica content of the black talc is preferably not less than 55wt%, more preferably not less than 57wt%, and the particle diameter of the black talc is preferably 5 to 10cm, more preferably 7 to 9cm; the length-diameter ratio of the wollastonite is preferably not less than 10, more preferably not less than 12; the particle size of the wollastonite is preferably 4 to 6cm, and more preferably 5cm; the dispersant preferably comprises an acrylamide dispersant and a vinyl acetate-maleic anhydride copolymer sodium salt dispersant; the mass ratio of the black talc to the wollastonite is preferably 1; the ratio of the total mass of the black talc and the wollastonite to the mass of the dispersant is preferably 100. In the present invention, the preparation method of the black talc is preferably: sequentially carrying out primary crushing and secondary crushing on the black talc raw ore to obtain black talc; the preparation method of the wollastonite is preferably as follows: and sequentially carrying out primary crushing and secondary crushing on the wollastonite raw ore to obtain the wollastonite.
In the invention, the grinding mode is preferably an air flow mill; d of the mixed powder obtained by grinding 50 The particle diameter is preferably 7 to 8 μm, more preferably 7.5 μm; the calcination temperature is preferably 1130-1170 ℃, more preferably 1150 ℃, and the heat preservation time is preferably 20-30 min, more preferably 23-27 min; the calcination apparatus is preferably a rotary kiln. The invention purifies black talc and wollastonite by calcination, free carbon and organic matter in the black talc and associated calcium carbonate in the wollastonite are decomposed, and the wollastonite is decomposed from low-temperature alpha-CaSiO 3 Conversion to high temperature state beta-CaSiO 3 。
After the sintered material is obtained, the sintered material and the silane coupling agent aqueous solution are sprayed, mixed and modified to obtain the composite powder. In the invention, the silane coupling agent in the silane coupling agent aqueous solution preferably comprises one or more of silane coupling agent A-1100, silane coupling agent A-187, silane coupling agent A-174 and silane coupling agent A-172; the concentration of the silane coupling agent aqueous solution is preferably 16.6 to 25wt%, and more preferably 18 to 23wt%; the pH value of the silane coupling agent aqueous solution is preferably 4-5, and more preferably 4.5; the pH value of the silane coupling agent aqueous solution is preferably obtained by adding a pH regulator to the silane coupling agent aqueous solution; the pH regulator preferably comprises one or more of citric acid, tartaric acid and lactic acid; the mass ratio of the sintering material to the silane coupling agent in the aqueous solution of the silane coupling agent is preferably 100.
In the present invention, the spray mixing is preferably: heating a silane coupling agent aqueous solution, and then adding the heated silane coupling agent aqueous solution into a sintering material in a stirring and converting state by spraying; the heating temperature is preferably 75-85 ℃, and more preferably 78-82 ℃; the stirring speed is preferably 210-270 rpm, more preferably 230-250 rpm; the spraying time is preferably 4-5 min, and more preferably 4min; according to the invention, through the spray mixing, the composite powder is subjected to uniform spraying of the silane coupling agent aqueous solution during uniform stirring, so that a good activation effect can be obtained, and the activation coating rate of the composite powder can reach more than 99%.
In the present invention, the modification is preferably: heating and modifying a material system obtained by spray mixing under the stirring condition; the temperature of the modification is preferably 100-120 ℃, more preferably 105-115 ℃, and the heat preservation time is preferably 10-15 min, more preferably 12-14 min; after the modification, preferably drying the product obtained by the modification; the drying temperature is preferably 105-110 ℃, more preferably 107-108 ℃, and the heat preservation time is preferably 20-30 min, more preferably 24-27 min; the drying equipment is preferably a crawler belt transmission type high-temperature baking oven; the invention removes the water content of the composite powder by drying.
The invention also provides the composite powder obtained by the preparation method in the scheme, and D of the composite powder 50 Is 7 to 8 μm, preferably 7.5 μm.
The invention also provides a resin modified master batch which is prepared from the following raw materials in parts by mass:
the composite powder is the composite powder in the scheme.
The raw materials of the resin modified master batch comprise 18-25 parts by mass of HDPE resin, preferably 20-24 parts by mass, and more preferably 22 parts by mass; the melt index of the HDPE resin is preferably 1.2-1.6 g/10min, and more preferably 1.3-1.5 g/10min.
The raw materials of the resin modified master batch comprise 16-20 parts of LLDPE resin, preferably 17-19 parts, more preferably 18 parts by mass of HDPE resin; the melt index of the LLDPE resin is preferably 3 to 4g/10min, more preferably 3.5g/10min.
The raw materials of the resin modified master batch comprise 75-85 parts of composite powder, preferably 77-83 parts, more preferably 79-81 parts by mass of HDPE resin; the composite powder is the composite powder in the scheme.
The raw material of the resin modified master batch provided by the invention comprises 0.7-1 part of zinc stearate, preferably 0.8-1 part, and more preferably 0.9 part by mass of HDPE resin.
The raw materials of the resin modified master batch provided by the invention comprise 4-5 parts of titanate coupling agent, preferably 4.2-4.8 parts, more preferably 4.5-4.7 parts by mass of HDPE resin; the titanate coupling agent preferably comprises one or more of coupling agent DL-411-A, coupling agent DL-411-D, coupling agent F-1 and coupling agent F-4.
The raw materials of the resin modified master batch provided by the invention comprise 1-1.4 parts of composite antioxidant, preferably 1.1-1.3 parts, more preferably 1.2 parts by mass of HDPE resin; the composite antioxidant preferably comprises an antioxidant 1010 and an antioxidant 168; the mass ratio of the antioxidant 1010 to the antioxidant 168 is preferably 1.
The raw material of the resin modified master batch provided by the invention comprises 1-1.5 parts of polyethylene wax, preferably 1.1-1.4 parts of polyethylene wax, and more preferably 1.2-1.3 parts of polyethylene wax based on the mass parts of HDPE resin.
The invention also provides a preparation method of the resin modified master batch, which comprises the following steps:
(1) Premixing the composite powder, zinc stearate, polyethylene wax and titanate coupling agent to obtain a premix;
(2) And mixing the premix, the composite antioxidant, the HDPE resin and the LLDPE resin, and then extruding and granulating to obtain the resin modified master batch.
The invention mixes the composite powder, zinc stearate, polyethylene wax and titanate coupling agent to obtain the premix. In the present invention, the rotation speed of the premixing is preferably 600 to 1000rpm, more preferably 700 to 9000rpm, the temperature of the premixing is preferably 105 to 120 ℃, more preferably 105 to 120 ℃, and the stirring time is preferably 5 to 10min, more preferably 7 to 9min.
After the premix is obtained, the premix, the composite antioxidant, the HDPE resin and the LLDPE resin are mixed and then extruded and granulated to obtain the resin modified master batch. In the invention, the rotation speed of the mixture of the premix, the composite antioxidant, the HDPE resin and the LLDPE resin is preferably 600-1200 rpm, more preferably 800-1000 rpm, the temperature is preferably 110-125 ℃, more preferably 115-120 ℃, and the stirring time is preferably 5-15 min, more preferably 7-12 min; after the mixing, preferably discharging the obtained mixture to a cold mixer for stirring (marked as first stirring); the time for the first stirring is preferably 2 to 3min, more preferably 2.5min.
In the present invention, the processing temperature of the extrusion granulation is preferably 170 to 200 ℃, more preferably 180 to 190 ℃, and further preferably 185 ℃; the equipment for extruding and granulating is preferably a double-screw extruder, and the processing temperature of the double-screw extruder is preferably divided into a first zone, a second zone, a third zone, a fourth zone, a fifth zone, a sixth zone, a seventh zone, an eighth zone and a ninth zone; the temperature of the first zone is preferably 170-175 ℃, and more preferably 172-174 ℃; the temperature of the second zone is preferably 175-180 ℃, and more preferably 177-179 ℃; the temperature of the three zones is preferably 180-185 ℃, and more preferably 182-184 ℃; the temperature of the four zones is preferably 185-190 ℃, and more preferably 187-189 ℃; the temperature of the five zones is preferably 190-195 ℃, and more preferably 191-193 ℃; the temperature of the six zones is preferably 195-200 ℃, more preferably 197-199 ℃; the temperature of the seven zones is preferably 195-200 ℃, and more preferably 197-198 ℃; the temperature of the eight regions is preferably 190-195 ℃, and more preferably 192-193 ℃; the temperature of the nine zones is preferably 185-190 ℃, and more preferably 187-188 ℃; the head temperature of the double-screw extruder is preferably 190-200 ℃, and more preferably 194-197 ℃; after the extrusion granulation, the obtained product is preferably cooled and then packaged.
FIG. 1 is a process flow chart of the present invention for preparing resin modified master batch, the specific process is as follows: respectively crushing black talc raw ore and wollastonite raw ore to a target particle size through primary crushing and secondary crushing, adding a dispersing agent after mixing, grinding the powder, then sequentially calcining, modifying and drying the obtained product to obtain composite powder, adding the composite powder into raw materials such as resin and the like for mixing, preplasticizing, extruding by a screw rod for granulating, cooling, drying and packaging to obtain the resin modified master batch product.
The preparation method of the resin modified master batch provided by the invention can realize whole-process closed and intelligent production in each step, and reduces dust pollution from raw ore to the final master batch by using the storage tank and closed conveying.
The invention also provides the application of the resin modified master batch in the scheme or the resin modified master batch prepared by the preparation method in the scheme in modification of HDPE resin.
In the present invention, the application preferably comprises the steps of: and mixing the resin modified master batch and the HDPE resin, and then extruding and granulating to obtain the modified HDPE resin. In the present invention, the mass ratio of the resin modified master batch to the HDPE resin is preferably 70 to 85, more preferably 75 to 80; the resin modified master batch provided by the invention is particularly suitable for modification of HDPE resin, can obviously improve the mechanical property and the processing property of the HDPE resin, and has a certain modification effect on other resins.
In order to further illustrate the invention, the following detailed description of the embodiments of the invention is given with reference to the accompanying drawings and examples, which are not to be construed as limiting the scope of the invention.
Example 1
The method comprises the following steps of primarily crushing black talc with the silicon dioxide content of 58wt% and wollastonite with the length-diameter ratio of 10 50 Mixed powder of 7.12 μm;
adding the obtained mixed powder into a rotary kiln through a storage tank (the temperature is 1150 ℃ for 30 min), cooling and adding into a modifying machine; mixing a silane coupling agent A187 with water according to the mass ratio of 1;
after drying, mixing and stirring the obtained composite powder, zinc stearate and PE wax according to a formula ratio (the formula ratio is shown in table 1), then adding a titanate coupling agent DL-411-A, wherein the stirring speed is 800rpm, the temperature is 115 ℃, the time is 8min, then adding a composite antioxidant (the mass ratio of the antioxidant 1010 to the antioxidant 168 is 1); adding the mixture into a double-screw extruder, cutting into granules at the processing temperature of 180-200 ℃, cooling and packaging to obtain the resin modified master batch.
Fig. 2 is a scanning electron microscope image of the composite powder prepared in this example under different magnifications, and it can be seen from fig. 2 that the composite powder prepared in this example has uniform components and high coating rate.
Example 2
The method comprises the following steps of primarily crushing black talc with the silicon dioxide content of 58wt% and wollastonite with the length-diameter ratio of 10 50 Mixed powder of 7.35 μm;
adding the obtained mixed powder into a rotary kiln (temperature 1160 ℃ C., time 30 min) through a storage tank, cooling, and adding into a modifying machine; mixing a silane coupling agent A174 with water according to the mass ratio of 1;
after drying, mixing and stirring the obtained composite powder, zinc stearate and PE wax according to a formula in proportion (the formula proportion is shown in table 1), then adding a titanate coupling agent DL-411-D, wherein the stirring speed is 800rpm, the temperature is 110 ℃, the time is 7min, then adding a composite antioxidant (the mass ratio of the antioxidant 1010 to the antioxidant 168 is 1); adding the mixture into a double-screw extruder, cutting into granules at the processing temperature of 180-200 ℃, cooling and packaging to obtain the resin modified master batch. The test data of the composite powder prepared in this example is similar to that of example 1.
Comparative examples 1 to 7
Comparative examples 1 to 7 were prepared in the same manner as in example 1 except that the raw material ratios were different, as shown in Table 1.
TABLE 1 formulations (parts by mass) of examples 1 to 2 of the present invention and comparative examples 1 to 7
Note: the total mass of calcium carbonate, black talc, wollastonite, black talc (calcined) and wollastonite (calcined) in table 1 is the mass of the composite powder.
The performance of the composite powder prepared in the embodiments 1 to 2 of the present invention was tested, and the test method was: chemical titration method is adopted for SiO 2 Detecting the content, oil absorption value, activation degree and trace elements, and adopting a laser particle size analyzer to detect D 50 And other parameters such as specific surface area, and the results are shown in table 2.
TABLE 2 test data of composite powders prepared in examples 1 to 2 of the present invention
As is clear from Table 2, the SiO content of the composite powders prepared in examples 1 to 2 of the present invention 2 High content, low oil absorption value, moderate particle size, high activation degree, low moisture content and low impurity content.
The performance of the resin modified master batches prepared in examples 1 to 2 and comparative examples 1 to 7 of the invention was tested by the following method: izod impact strength was measured in accordance with GB/T1843-2008, tensile strength and elongation at break were measured in accordance with GB/T1040.1-2008, and flexural strength and flexural modulus were measured in accordance with GB/T9341-2008, with the results shown in Table 3.
TABLE 3 comparison of the Properties of inventive examples 1-2 with comparative examples 1-7
As is clear from comparison of the data of examples 1 to 2 and comparative example 1 in Table 3, the Izod impact strength of the resin modified master batch prepared in examples 1 to 2 of the present invention was not less than 38kJ/m 2 The elongation at break is more than or equal to 38 percent, the elastic modulus is more than or equal to 1200Mpa, and the tensile strength is improved by 40 to 100 percent compared with that of comparative example 1.
As can be seen from tables 1 and 3, the calcined black talc is added in the comparative example 2, so that the blanking is difficult, and the problem of coke charge is easily caused due to the difficult processing and even the production cannot be realized because the flaky structure has certain self-lubrication; comparative example 3 the calcined wollastonite is added only, the hardness of the needle-like structure is extremely high, the problems of surface black lines, pockmarks and the like are easily formed during processing, the damage to the screw is obvious, and the single production cannot be realized. Thus, it is shown that calcined black talc and calcined wollastonite need to be used in combination to improve processing fluidity. Secondly, comparative example 4 has a 33.8% increase in flexural modulus but no improvement in Izod impact and elongation at break using a calcium carbonate and black talc composite filler as compared to comparative example 1; compared with the comparative example 1, the calcium carbonate and wollastonite composite filler is used, the elongation at break and the Izod impact are improved by more than 20 percent, but the flexural modulus is improved less, and the general performance requirements are not met. In addition, the formula of the embodiment 1 is the same as that of the comparative example 6, and the formula of the embodiment 2 is the same as that of the comparative example 7, except that whether the black talc and the wollastonite are calcined and purified or not, and after the black talc and the wollastonite are calcined and purified, the cantilever beam impact strength, the elongation at break and the elastic modulus of the resin modified master batch are obviously improved.
The embodiment shows that the composite powder provided by the invention has good processing fluidity, the impact strength, the elongation at break and the elastic modulus of the resin added with the composite powder are all fundamentally improved, and the problem of insufficient mechanical property of the material obtained by single high-addition-amount powder is solved; the whiteness and the toughness of the calcined black talc used in the invention are improved, so that the mechanical property and the processability of the HDPE resin can be obviously improved.
Although the above embodiments have been described in detail, they are only a part of the embodiments of the present invention, not all of the embodiments, and other embodiments can be obtained without inventive step according to the embodiments, and all of the embodiments belong to the protection scope of the present invention.
Claims (10)
1. The preparation method of the composite powder is characterized by comprising the following steps:
(1) Mixing black talc, wollastonite and a dispersing agent, and sequentially grinding and calcining to obtain a sintered material;
(2) And (3) carrying out spray mixing on the sintering material and a silane coupling agent aqueous solution, and then modifying to obtain the composite powder.
2. The method according to claim 1, wherein the black talc has a silica content of not less than 55wt% and a particle diameter of 5 to 10cm;
the length-diameter ratio of the wollastonite is not less than 10, and the particle size is 4-6 cm.
3. The preparation method according to claim 1, wherein the mass ratio of the black talc to the wollastonite is 1;
the mass ratio of the total mass of the black talc and the wollastonite to the mass of the dispersing agent is 100;
the mass ratio of the sintering material to the silane coupling agent in the silane coupling agent aqueous solution is 100: 0.6-1;
the concentration of the silane coupling agent aqueous solution is 16.6-25 wt%.
4. The preparation method of claim 1, wherein the calcination temperature is 1130 to 1170 ℃, and the holding time is 20 to 30min;
the temperature of the modification is 100-120 ℃, and the heat preservation time is 10-15 min.
5. A composite powder obtained by the production method according to any one of claims 1 to 4, wherein D is the content of 50 Is 7-8 μm.
6. The resin modified master batch is characterized by being prepared from the following raw materials in parts by mass:
18-25 parts of HDPE resin;
16-20 parts of LLDPE resin;
75-85 parts of composite powder;
0.7-1 part of zinc stearate;
4-5 parts of titanate coupling agent;
1-1.4 parts of a composite antioxidant;
1-1.5 parts of polyethylene wax;
the composite powder according to claim 5.
7. The resin modified masterbatch of claim 6, wherein the complex antioxidant comprises antioxidant 1010 and antioxidant 168.
8. The method for preparing the resin modified master batch according to any one of claims 6 to 7, comprising the steps of:
(1) Premixing the composite powder, zinc stearate, polyethylene wax and titanate coupling agent to obtain a premix;
(2) And mixing the premix, the composite antioxidant, the HDPE resin and the LLDPE resin, and then extruding and granulating to obtain the resin modified master batch.
9. The method according to claim 7, wherein the extrusion granulation is performed at a processing temperature of 170 to 200 ℃.
10. Use of the resin modified masterbatch according to any one of claims 6 to 7 or the resin modified masterbatch obtained by the preparation method according to any one of claims 8 to 9 for modifying HDPE resin.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116284589A (en) * | 2023-04-11 | 2023-06-23 | 上饶市聚微星科技有限公司 | Photosensitive resin composition for additive manufacturing modified by black talc and preparation method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116284589A (en) * | 2023-04-11 | 2023-06-23 | 上饶市聚微星科技有限公司 | Photosensitive resin composition for additive manufacturing modified by black talc and preparation method thereof |
| CN116284589B (en) * | 2023-04-11 | 2024-02-20 | 上饶市聚微星科技有限公司 | Photosensitive resin composition for additive manufacturing modified by black talc and preparation method thereof |
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