Metal sulfide and use thereof, and resin composition containing metal sulfide

Abstract

A metal sulfide. The metal sulfide is a zinc sulfide material. By controlling the particle size distributions of the zinc sulfide, Dv10, Dv25, Dv50, Dv75, and Dv97 of the zinc sulfide material satisfy the corresponding relational expressions, so that the zinc sulfide material can effectively cover a resin, and the dispersion state of the zinc sulfide material in the resin is more uniform and stable due to the suitable particle size distributions of the zinc sulfide.

Description

Metal sulfide and its application, resin composition containing the metal sulfide Technical Field

[0001] The present invention relates to the technical field of sulfides, and in particular to a metal sulfide and application thereof, and a resin composition containing the metal sulfide. Background Art

[0002] Zinc sulfide (ZnS) as a white pigment has a high refractive index and opacity, is easy to disperse and not easy to agglomerate. When used in plastics and coatings, it can give the materials good covering and whitening effects.

[0003] Generally speaking, resin materials containing zinc sulfide have good color stability. However, as plastic products are increasingly used in outdoor products, such as outdoor electronic and electrical product housings, building door and window profiles, outdoor plastic seats, and garden fences, more stringent requirements are placed on the material's color stability.

[0004] For example, with the recent development of the LED industry, demand for high-power, high-brightness LED lamp beads has increased. Existing technology reports that LED components using polymer resins as the base material and zinc sulfide as the white pigment are prone to yellowing and discoloration under prolonged high-temperature exposure. Therefore, high-power, high-brightness LED components, such as housings and reflective brackets, require not only suitable whiteness but also excellent color stability.

[0005] In addition, for certain more demanding usage scenarios, such as environments with alternating high and low temperatures, resin materials containing zinc sulfide often experience more severe whiteness changes.

[0006] Therefore, in order to further broaden the application scope of zinc sulfide materials, especially to meet some harsh environmental conditions of high and low temperatures, it is necessary to provide a zinc sulfide material with little change in whiteness under harsh environments.

[0007] Summary of the Invention

[0008] The present invention aims to overcome the shortcomings of the prior art and provide a metal sulfide and its application, as well as a resin composition containing the metal sulfide. By controlling the particle size distribution of the zinc sulfide material, the resin composition containing the zinc sulfide material has high color stability and a low whiteness value change rate under alternating high and low temperature environments.

[0009] To achieve the above object, in a first aspect of the present invention, a metal sulfide is provided, wherein the metal sulfide is a zinc sulfide material, and the particle size distribution Dv25, Dv50, and Dv75 of the zinc sulfide material satisfy the following relationship: 1.0≤1000×(Dv75-Dv25) / (Dv50) 2 ≤2.2; and

[0010] The particle size distributions Dv10, Dv50, and Dv97 of the zinc sulfide material satisfy the following relationship: 3.0≤(Dv97×Dv50) / (Dv10×1000)≤12.8;

[0011] Wherein, Dv10, Dv25, Dv50, Dv75 and Dv97 respectively represent the particle sizes corresponding to when the cumulative volume distribution percentage of the zinc sulfide material reaches 10%, 25%, 50%, 75% and 97%, and the unit is nm.

[0012] As a preferred embodiment of the present invention, the particle size distribution Dv25, Dv50, and Dv75 of the zinc sulfide material satisfy the following relationship: 1.1≤1000×(Dv75-Dv25) / (Dv50) 2 ≤2.0.

[0013] As a preferred embodiment of the present invention, the particle size distributions Dv10, Dv50, and Dv97 of the zinc sulfide material satisfy the following relationship: 3.5≤(Dv97×Dv50) / (Dv10×1000)≤12.0.

[0014] As a preferred embodiment of the present invention, the Dv50 of the zinc sulfide material is 550 to 850 nm.

[0015] As a more preferred embodiment of the present invention, the Dv50 of the zinc sulfide material is 630 to 780 nm.

[0016] As a preferred embodiment of the present invention, the zinc sulfide material satisfies at least one of the following characteristics (a) to (d):

[0017] (a) Dv10 of the zinc sulfide material is 200 to 340nm;

[0018] (b) Dv25 of the zinc sulfide material is 350 to 500nm;

[0019] (c) Dv75 of the zinc sulfide material is 900 to 1500nm;

[0020] (d) The Dv97 of the zinc sulfide material is 1600 to 4500 nm.

[0021] As a more preferred embodiment of the present invention, the zinc sulfide material satisfies at least one of the following characteristics (e) to (h):

[0022] (e) Dv10 of the zinc sulfide material is 250 to 300nm;

[0023] (f) Dv25 of the zinc sulfide material is 380 to 480nm;

[0024] (g) Dv75 of the zinc sulfide material is 1000 to 1400nm;

[0025] (h). The Dv97 of the zinc sulfide material is 3200 to 4300 nm.

[0026] As a preferred embodiment of the present invention, the particle size distribution Dv50 and loose bulk density BD of the zinc sulfide material satisfy the following relationship: 18≤Dv50 / (lgBD×10)≤27;

[0027] Wherein, the unit of Dv50 is nm, and the unit of BD is kg / m 3 .

[0028] As a preferred embodiment of the present invention, the BD of the zinc sulfide material is 600-1200 kg / m 3 .

[0029] As a preferred embodiment of the present invention, the loose bulk density BD and the tapped bulk density TD of the zinc sulfide material satisfy the following relationship: (TD-BD) / TD*100%≤40%;

[0030] Wherein, the units of TD and BD are kg / m 3 .

[0031] As a preferred embodiment of the present invention, the TD of the zinc sulfide material is 900-1500 kg / m 3 .

[0032] As a preferred embodiment of the present invention, the BET of the zinc sulfide material is 8.5 to 11.5 m 2 / g.

[0033] In a second aspect of the present invention, the present invention provides a use of the metal sulfide described above in preparing a resin composition.

[0034] In a third aspect of the present invention, the present invention provides a resin composition comprising the following components in parts by weight:

[0035] 100 parts of resin and 0.5 to 10 parts of the above-mentioned metal sulfide.

[0036] As a preferred embodiment of the present invention, the resin includes at least one of polyethylene (PE), polypropylene (PP), polyamide (PA), polycarbonate (PC), polybutylene terephthalate (PBT), polyethylene terephthalate (PET), epoxy resin (EP), acrylonitrile-butadiene-styrene copolymer (ABS), and styrene-acrylonitrile copolymer (AS).

[0037] The beneficial effects of the present invention are:

[0038] The metal sulfide of the present invention has a suitable particle size distribution, so that the resin composition containing the metal sulfide has high color stability and low whiteness change rate under high and low temperature alternating environments. DETAILED DESCRIPTION

[0039] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0040] In the present invention, the technical features described in an open manner include closed technical solutions composed of the listed features, and also include open technical solutions containing the listed features.

[0041] In the present invention, when referring to numerical ranges, unless otherwise specified, the numerical ranges are considered continuous and include the minimum and maximum values ​​of the range, as well as every value between such minimum and maximum values. Furthermore, when a range refers to an integer, every integer between the minimum and maximum values ​​of the range is included. In addition, when multiple ranges are provided to describe a feature or characteristic, the ranges can be combined. In other words, unless otherwise specified, all ranges disclosed herein should be understood to include any and all subranges subsumed therein.

[0042] In the present invention, there is no particular limitation on the specific dispersion and stirring treatment methods.

[0043] The reagents and instruments used in the present invention without indicating the manufacturer are all conventional products that can be purchased from the market.

[0044] The invention aims to solve the problem of color change of a resin composition containing zinc sulfide in high and low temperature environments in the prior art.

[0045] An embodiment of the present invention provides a metal sulfide, wherein the metal sulfide is a zinc sulfide material, and the particle size distribution Dv25, Dv50, and Dv75 of the zinc sulfide material satisfy the following relationship: 1.0≤1000×(Dv75-Dv25) / (Dv50) 2 ≤2.2; and

[0046] The particle size distributions Dv10, Dv50, and Dv97 of the zinc sulfide material satisfy the following relationship: 3.0≤(Dv97×Dv50) / (Dv10×1000)≤12.8;

[0047] Wherein, Dv10, Dv25, Dv50, Dv75 and Dv97 respectively represent the particle sizes corresponding to when the cumulative volume distribution percentage of the zinc sulfide material reaches 10%, 25%, 50%, 75% and 97%, and the unit is nm.

[0048] This study found that by controlling the particle size distribution of zinc sulfide, when the Dv10, Dv25, Dv50, Dv75, and Dv97 of the zinc sulfide material satisfy the above two relationship formulas, the zinc sulfide material can not only effectively play a covering role in the resin, but also the zinc sulfide has a suitable particle size distribution, so that the dispersion state of the zinc sulfide material in the resin is more uniform and stable, and the interfacial bonding force between zinc sulfide as an inorganic material and the organic material resin is higher. Under harsh temperature conditions, the zinc sulfide material of the present invention has better stability, is not easy to decompose or degrade to produce colored substances, or to react or interact with other components in the resin, and is not easy to cause its whitening and covering effects on the resin to be weakened due to volatilization. At the same time, the zinc sulfide material of the present invention can greatly improve the stability of the resin composition after being added to the resin, thereby not being easily affected by changes in ambient temperature and causing the color of the material to change, thereby improving the color stability of the resin composition containing the zinc sulfide material.

[0049] In the relationship 1.0≤1000×(Dv75-Dv25) / (Dv50) 2 ≤2.2: The smaller the value of (Dv75-Dv25), the more concentrated the particle size distribution of the zinc sulfide material is. However, if the value of (Dv75-Dv25) is too small, the particle size of the zinc sulfide particles is too uniform, and it is impossible to achieve a compounding of large and small particle sizes, which has limited improvement on the color stability of the material. In addition, 1000×(Dv75-Dv25) is different from (Dv50). 2 The ratio should be within the range of 1.0 to 2.2. Dv50 is the median particle size of zinc sulfide material. 2 Too large or too small, making 1000×(Dv75-Dv25) / (Dv50) 2When the value is less than 1.0 or greater than 2.2, the zinc sulfide material may have problems such as severe cohesion between particles, poor dispersibility, decreased hiding ability or decreased stability, which may lead to unsatisfactory color stability of the resin containing zinc sulfide material and high whiteness change rate under high and low temperature aging conditions.

[0050] In the relationship: 3.0≤(Dv97×Dv50) / (Dv10×1000)≤12.8, Dv97 represents the particle size corresponding to when the cumulative volume distribution percentage of the zinc sulfide material reaches 97%, that is, the average particle size of relatively large particles; similarly, Dv10 represents the average particle size of relatively small particles. By controlling the ratio of (Dv97×Dv50) to (Dv10×1000) to meet 3.0-12.8, the particle sizes of the zinc sulfide material are moderately varied, thereby greatly improving the interfacial bonding strength between the zinc sulfide (inorganic material) and the organic resin, and preventing the resin composition containing zinc sulfide from phase separation under harsh temperature conditions, which can lead to a decrease in color stability.

[0051] The present invention does not limit the detection method of Dv10, Dv25, Dv50, Dv75 and Dv97. Those skilled in the art can detect the particle size distribution of zinc sulfide materials according to conventional technical means. For example, the particle size distribution laser diffraction method according to GB / T19077-2016 can be referred to and measured using a laser particle size analyzer, such as the OMEC LS-POP (9) laser particle size analyzer.

[0052] In one embodiment, the particle size distributions Dv25, Dv50, and Dv75 of the zinc sulfide material satisfy the following relationship: 1.1≤1000×(Dv75-Dv25) / (Dv50) 2 ≤2.0.

[0053] In one embodiment, the particle size distributions Dv10, Dv50, and Dv97 of the zinc sulfide material satisfy the following relationship: 3.5≤(Dv97×Dv50) / (Dv10×1000)≤12.0.

[0054] This study found that when the particle size distribution of the zinc sulfide material further satisfies the above relationship range, the color stability of the resin composition containing the zinc sulfide material is better, and the whiteness value change rate of the resin composition after alternating high and low temperature treatment is smaller.

[0055] In one embodiment, the Dv50 of the zinc sulfide material is 550-850 nm. For example, the Dv50 of the zinc sulfide material may be 605 nm, 632 nm, 680 nm, 750 nm, 772 nm, 800 nm, or 837 nm.

[0056] In one preferred embodiment, the Dv50 of the zinc sulfide material is 630-780 nm.

[0057] In one embodiment, the zinc sulfide material satisfies at least one of the following characteristics (a) to (d):

[0058] (a) Dv10 of the zinc sulfide material is 200 to 340nm;

[0059] (b) Dv25 of the zinc sulfide material is 350 to 500nm;

[0060] (c) Dv75 of the zinc sulfide material is 900 to 1500nm;

[0061] (d) The Dv97 of the zinc sulfide material is 1600 to 4500 nm.

[0062] In one preferred embodiment, the Dv10 of the zinc sulfide material is 250-300 nm. For example, the Dv10 of the zinc sulfide material may be 265 nm, 270 nm, 272 nm, or 278 nm.

[0063] In one preferred embodiment, the Dv25 of the zinc sulfide material is 380-480 nm. For example, the Dv25 of the zinc sulfide material may be 408 nm, 415 nm, 420 nm, 430 nm, or 446 nm.

[0064] In one preferred embodiment, the Dv75 of the zinc sulfide material is 1000-1400 nm. For example, the Dv75 of the zinc sulfide material may be 1085 nm, 1150 nm, 1220 nm, 1350 nm, or 1400 nm.

[0065] In one preferred embodiment, the Dv97 of the zinc sulfide material is 3200-4300 nm. For example, the Dv97 of the zinc sulfide material can be 3400 nm, 3500 nm, 3700 nm, 3950 nm, 4000 nm, 4150 nm, or 4260 nm.

[0066] In one embodiment, the particle size distribution Dv50 and loose bulk density BD of the zinc sulfide material satisfy the following relationship: 18≤Dv50 / (lgBD×10)≤27;

[0067] Wherein, the unit of Dv50 is nm, and the unit of BD is kg / m 3 .

[0068] The loose bulk density (BD) reflects the interstitial volume between zinc sulfide particles and, to a certain extent, the morphology of the zinc sulfide particles. When the zinc sulfide material satisfies Dv50 / (lgBD×10) of 18 to 27, the zinc sulfide material has a moderate particle size distribution, suitable zinc sulfide particle morphology, and moderate interstitial volume, which contributes to better color stability of the resin composition containing zinc sulfide.

[0069] In one embodiment, the BD of the zinc sulfide material is 650-1200 kg / m 3 For example, the BD of the zinc sulfide material can be 660 kg / m 3 、670kg / m 3 、680kg / m 3 , 700kg / m 3 , 900kg / m 3 、1150kg / m 3 .

[0070] In one preferred embodiment, the BD of the zinc sulfide material is 660-800 kg / m 3 .

[0071] In one embodiment, the loose bulk density BD and the tapped bulk density TD of the zinc sulfide material satisfy the following relationship: (TD-BD) / TD*100%≤40%;

[0072] Wherein, the units of TD and BD are kg / m 3 .

[0073] In one preferred embodiment, the loose bulk density BD and the tapped bulk density TD of the zinc sulfide material satisfy the following relationship: 20≤(TD-BD) / TD*100%≤35%.

[0074] The ratio of (TD - BD) to TD is equivalent to the compressibility of the zinc sulfide material. The compressibility of the zinc sulfide material is related to the morphological regularity and particle size distribution of the zinc sulfide particles. When TD - BD) / TD * 100% is within the above preferred range, the zinc sulfide material has a more effective effect on improving color stability.

[0075] In one embodiment, the TD of the zinc sulfide material is 900-1500 kg / m 3 For example, the TD of the zinc sulfide material can be 950 kg / m 3 , 970kg / m 3 , 1000kg / m 3 、1050kg / m 3 、 1100kg / m 3, 1200kg / m 3 、1420kg / m 3 .

[0076] In one preferred embodiment, the TD of the zinc sulfide material is 950-1150 kg / m 3 .

[0077] The present invention does not limit the detection method of the loose bulk density BD and the tapped bulk density TD of the zinc sulfide material. Those skilled in the art can detect the BD and TD of the zinc sulfide material according to conventional technical means. For example, the following method can be used for determination: the zinc sulfide material is naturally dropped into a 100 cm stainless steel container by vibrating the sample supply device. 3 Place the zinc sulfide material in the cylindrical container until it is full. Use a blade to scrape off the excess zinc sulfide material on the container and convert the measured density into kg / m 3 Then, in a stainless steel 100cm 3 The cylindrical container was covered with a lid, and the sample supply device was vibrated to allow the zinc sulfide material to flow down. The vibration was carried out under the conditions of a stroke length (vibration height) of 18 mm, a vibration speed of 60 times / min, and a vibration frequency of 180 times. Then, the excess zinc sulfide material on the container was scraped off with a blade. The measured density was converted to kg / m 3 This is the tapped bulk density.

[0078] One embodiment of the present invention provides use of the metal sulfide described above in preparing a resin composition.

[0079] One embodiment of the present invention provides a resin composition comprising the following components in parts by weight:

[0080] 100 parts of resin and 0.5 to 10 parts of the above-mentioned metal sulfide.

[0081] In one embodiment, the resin includes at least one of polyethylene (PE), polypropylene (PP), polyamide (PA), polycarbonate (PC), polybutylene terephthalate (PBT), polyethylene terephthalate (PET), epoxy resin (EP), acrylonitrile-butadiene-styrene copolymer (ABS), and styrene-acrylonitrile copolymer (AS).

[0082] In practical applications, according to actual performance requirements, the resin composition may further include 0 to 10 parts by weight of other additives, wherein the other additives are selected from at least one of lubricants, yellowing inhibitors, antioxidants, heat stabilizers, light stabilizers, other polymers, impact modifiers, flame retardants, fluorescent whitening agents, plasticizers, thickeners, antistatic agents, release agents, and nucleating agents.

[0083] It should be noted that the preparation method of the resin composition is not particularly limited in the present invention, and those skilled in the art can prepare the resin composition according to conventional methods.

[0084] Exemplarily, the preparation method of the resin composition is:

[0085] The resin, metal sulfide and other additives are mixed and added to an extruder, and the mixture is melt-mixed and extruded into granules to obtain the resin composition.

[0086] Specifically, the extruder may be a twin-screw extruder, the screw aspect ratio of the twin-screw extruder is 36-72:1, the screw speed is 100-500 rpm, and the melting temperature of the twin-screw extruder is 180-280°C.

[0087] After the high and low temperature alternating aging test, the whiteness value change rate of the above-mentioned resin composition is ≤10%, wherein the specific conditions of the high and low temperature alternating aging test are: after the resin composition is injection molded into a 2 cm thick sample, it is placed in a high and low temperature test chamber, and the test conditions are: low temperature -10±2°C, continuous 12 hours, changing to high temperature 80±3°C, continuous 12 hours, the temperature switching time is less than 30 seconds, and it is one cycle; a total of 10 cycles are performed.

[0088] The present invention is further described below with specific embodiments:

[0089] Examples and Comparative Examples

[0090] The embodiments and comparative examples of the present invention each prepare a zinc sulfide material, and the preparation of the zinc sulfide material includes the following steps:

[0091] Grind zinc oxide into powder and disperse it into 20wt.% sulfuric acid solution. Control the pH of the system to 5-7.

[0092] Sodium sulfide is added, wherein the weight ratio of sodium sulfide to zinc oxide is 1:(2-2.5), and the mixture is reacted at 80-120° C. and 100-200 rpm for 15-18 hours, and the pH of the reaction system is controlled to be 6-8;

[0093] After the reaction is completed, the product is cooled, separated and taken out, washed three times with distilled water, filtered, dried, crushed and sieved; by controlling the degree of crushing and sieving conditions, zinc sulfide materials with different particle size distributions, loose bulk density and tapped bulk density are obtained.

[0094] Specifically, the particle size distribution, loose bulk density, and tapped bulk density of the zinc sulfide materials of Examples 1 to 9 and Comparative Examples 1 to 3 are shown in Table 1.

[0095] Table 1

[0096] After calculation, the formulas satisfied by the embodiments and comparative examples are shown in Table 2.

[0097] The zinc sulfide materials prepared in the examples and comparative examples were used as white pigments to prepare resin compositions according to the following component contents (parts by weight): 100 parts of polyamide resin, 3 parts of white pigment, and 1 part of antioxidant 1010;

[0098] The preparation method of the resin composition is as follows:

[0099] The polyamide resin, white pigment (zinc sulfide material) and antioxidant 1010 were mixed and added to a twin-screw extruder with a screw speed of 300 rpm and a melting temperature of 260° C. The resin composition was obtained by melt mixing and extrusion granulation.

[0100] The color stability of the resin composition was tested. The results are shown in Table 2. The specific method of testing is as follows:

[0101] After the resin composition is injection-molded into a 2 cm thick sample, the whiteness value (W1) is detected, and then the resin composition is subjected to a high-low temperature alternating aging test. The specific conditions of the high-low temperature alternating aging test are as follows: the sample molded with the resin composition is placed in a high-low temperature test chamber, and the test conditions are: low temperature of -10±2°C for 12 hours, and then changed to high temperature of 80±3°C for 12 hours, with the temperature switching time being less than 30 seconds, which constitutes one cycle; a total of 10 cycles are performed; the whiteness value (W2) after aging is again detected, and the whiteness value change rate (ΔW) is calculated, ΔW=(W1-W2) / W1*100%;

[0102] The whiteness value is tested as follows:

[0103] The chromaticity of the sample was measured using a spectrophotometer SD5000 (manufactured by Nippon Denshoku Industries Co., Ltd.), and the lightness (L), redness value (a), and yellowness value (b) were calculated using the Hunter color difference formula; the whiteness (W) was calculated according to the following formula: W = 100 - [(100 - L)] 2 +a 2+b 2 ] 1 / 2 .

[0104] Table 2

[0105] As can be seen from Table 2, the zinc sulfide materials of various embodiments of the present invention can effectively improve the color stability of the resin composition. Under high and low temperature alternating aging conditions, the whiteness value change rate of the resin composition containing the zinc sulfide materials of various embodiments is less than 10%.

[0106] According to the test results of Examples 1 to 4 and Examples 5 to 7, when the particle size distribution of the zinc sulfide material further satisfies: 1.1≤1000×(Dv75-Dv25) / (Dv50) 2 When ≤2.0 and 3.5≤(Dv97×Dv50) / (Dv10×1000)≤12.0, the color stability of the resin composition containing the zinc sulfide material is better, and the whiteness value change rate of the resin composition after alternating high and low temperature treatment is smaller.

[0107] According to Examples 1 to 4 and Examples 8 and 9, it can be seen that when the zinc sulfide material further satisfies 18≤Dv50 / (lgBD×10)≤27 and (TD-BD) / TD*100%≤40%, the whiteness stability of the resin is further improved, and the whiteness value change rate of the resin composition is relatively lower.

[0108] It should be noted that although only polyamide resin is used as the resin component of the resin composition in the embodiments of the present invention, in fact, when the polyamide resin is replaced by other thermoplastic resins or thermosetting resins, such as polyethylene, polypropylene, polycarbonate, polybutylene terephthalate, polyethylene terephthalate, epoxy resin, acrylonitrile-butadiene-styrene copolymer or styrene-acrylonitrile copolymer, similar color stability effects can be achieved.

[0109] In addition, when the zinc sulfide material of Example 1 is used as the white pigment and the resin composition is prepared with a component content of 100 parts of polyamide resin, 10 parts of white pigment, and 1 part of antioxidant, the whiteness value change rate is 5.1%; when the zinc sulfide material of Example 1 is used as the white pigment and the resin composition is prepared with a component content of 100 parts of polyamide resin, 0.1 parts of white pigment, and 1 part of antioxidant, the whiteness value change rate is 8.9%.

[0110] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A metal sulfide, characterized in that: The metal sulfide is a zinc sulfide material, and the particle size distribution Dv25, Dv50, and Dv75 of the zinc sulfide material satisfy the following relationship: 1.0≤1000×(Dv75-Dv25) / (Dv50) 2 ≤2.2; and The particle size distributions Dv10, Dv50, and Dv97 of the zinc sulfide material satisfy the following relationship: 3.0≤(Dv97×Dv50) / (Dv10×1000)≤12.8; Among them, Dv10, Dv25, Dv50, Dv75, and Dv97 respectively represent the particle sizes corresponding to when the volume cumulative distribution percentage of the zinc sulfide material reaches 10%, 25%, 50%, 75%, and 97%, and the unit is nm.

2. The metal sulfide according to claim 1, characterized in that: The particle size distribution Dv25, Dv50, and Dv75 of the zinc sulfide material satisfy the following relationship: 1.1≤1000×(Dv75-Dv25) / (Dv50) 2 ≤2.

0.

3. The metal sulfide according to claim 1, characterized in that: The particle size distributions Dv10, Dv50 and Dv97 of the zinc sulfide material satisfy the following relationship: 3.5≤(Dv97×Dv50) / (Dv10×1000)≤12.

0.

4. The metal sulfide according to any one of claims 1 to 3, characterized in that The Dv50 of the zinc sulfide material is 550-850nm.

5. The metal sulfide according to any one of claims 1 to 3, characterized in that: It includes at least one of the following features (a) to (d): (a) The Dv10 of the zinc sulfide material is 200 to 340 nm; (b) The Dv25 of the zinc sulfide material is 350 to 500 nm; (c) The Dv75 of the zinc sulfide material is 900 to 1500 nm; (d) The Dv97 of the zinc sulfide material is 1600 to 4500 nm.

6. The metal sulfide according to claim 1, characterized in that: The particle size distribution Dv50 and loose bulk density BD of the zinc sulfide material satisfy the following relationship: 18≤Dv50 / (lgBD×10)≤27; Wherein, the unit of Dv50 is nm, and the unit of BD is kg / m 3 .

7. The metal sulfide according to claim 6, characterized in that: The BD of the zinc sulfide material is 600-1200 kg / m 3 .

8. The metal sulfide according to claim 6 or 7, characterized in that: The loose bulk density BD and the tapped bulk density TD of the zinc sulfide material satisfy the following relationship: (TD-BD) / TD*100%≤40%; Wherein, the units of TD and BD are kg / m 3 .

9. The metal sulfide according to claim 8, characterized in that: The TD of the zinc sulfide material is 900-1500 kg / m 3 .

10. Use of the metal sulfide according to any one of claims 1 to 9 in the preparation of a resin composition.

11. A resin composition, characterized in that: The composition comprises the following components in parts by weight: 100 parts of resin and 0.5 to 10 parts of the metal sulfide according to any one of claims 1 to 9.

12. The resin composition according to claim 11, characterized in that: The resin includes at least one of polyethylene, polypropylene, polyamide, polycarbonate, polybutylene terephthalate, polyethylene terephthalate, epoxy resin, acrylonitrile-butadiene-styrene copolymer, and styrene-acrylonitrile copolymer.

Images