Superfine organic powder and preparation device and preparation method thereof

Abstract

The invention provides superfine organic powder as well as a preparation device and a preparation method thereof, and relates to the technical field of organic powder preparation. The superfine organic powder is mainly prepared from EB resin and EB monomers through EB electron beam curtain curing, and the superfine organic powder is solid organic powder with the particle size of 1-200 microns. Through detection and verification, the superfine organic spherical powder provided by the invention not only has better weather resistance, superior transparency and balanced hardness and toughness, but also has superior scratch resistance, excellent solvent resistance, high filling property and excellent hand feeling.

Description

Technical Field

[0001] The invention relates to the technical field of organic powder preparation, and in particular to an ultrafine organic powder and a preparation device and a preparation method thereof. Background Art

[0002] At present, the powders on the market are mainly inorganic powders, such as talcum powder, calcium carbonate and silica powder, etc. However, inorganic powders have poor transparency, rough feel, and cannot be added in large quantities due to the thickening phenomenon caused by high oil absorption, so they cannot meet the increasingly high market demand.

[0003] In order to meet the requirements of transparency, scratch resistance and feel in industries such as engineering plastics, plastic films, high-end coatings and inks, organic wax powders such as PP wax powder and PE wax powder have appeared on the market. However, the transparency and wear resistance of PP, PE and other wax powders cannot meet the market demand.

[0004] Therefore, it is necessary and urgent to research and develop a solid spherical structured organic powder that not only has the characteristics of high weather resistance, high hardness and high transparency, but also has excellent scratch resistance, outstanding solvent resistance and high filling capacity.

[0005] In view of this, the present invention is proposed. Summary of the invention

[0006] The first object of the present invention is to provide an ultrafine organic powder, which not only has better weather resistance, hardness and transparency, but also has excellent scratch resistance, excellent solvent resistance, high filling property and excellent hand feel.

[0007] The second object of the present invention is to provide a device for preparing ultrafine organic powder.

[0008] The third object of the present invention is to provide an application of ultrafine organic powder.

[0009] In order to achieve the above-mentioned purpose of the present invention, the following technical solutions are particularly adopted:

[0010] The present invention provides an ultrafine organic powder, wherein the ultrafine organic powder is mainly prepared by using EB resin and EB monomer as raw materials and curing them through EB electron beam curtain;

[0011] The ultrafine organic powder is a solid organic powder with a particle size of 1 to 200 μm.

[0012] Furthermore, the organic powder raw materials are EB resin and EB monomer. The EB resin and EB monomer used are different according to the requirements for preparing powders with different properties, and can be a mixture of one or more of the EB resin and EB monomer.

[0013] The EB resin includes UV acrylic resin, UV epoxy acrylic resin, UV polyester resin, UV prepolymer resin, EB epoxy resin and other resins that can be EB-cured;

[0014] The EB monomers include tripropylene glycol diacrylate, dipentaerythritol hexaacrylate, hexanediol diacrylate, neopentyl glycol diacrylate, pentaerythritol triacrylate, trimethylolpropane triacrylate, ethoxylated trimethylolpropane triacrylate, isobornyl methacrylate, n-butyl methacrylate and other monofunctional or polyfunctional unsaturated monomers.

[0015] The present invention provides a device for preparing the ultrafine organic powder, which comprises: a raw material storage tank, a high-pressure nitrogen atomization curtain nozzle and an EB electron beam curtain generator, wherein:

[0016] The raw material storage tank is connected to a high-pressure nitrogen atomizing curtain nozzle pipeline, and the spray direction of the high-pressure nitrogen atomizing curtain nozzle is directly above the electron beam curtain generated by the EB electron beam curtain generator.

[0017] Furthermore, a flow pump is provided on the connecting pipeline between the raw material storage tank and the high-pressure nitrogen atomizing curtain nozzle.

[0018] Furthermore, the preparation device also includes a powder collecting device.

[0019] Furthermore, the powder collecting device comprises a rectangular horn collecting port arranged below the electron beam curtain, a powder collector and a packaging machine, wherein:

[0020] The rectangular trumpet collecting port is connected to the powder collector pipeline;

[0021] The packaging machine is arranged at the powder outlet of the powder collector.

[0022] Furthermore, the powder collector is provided with an induced draft fan.

[0023] The invention provides an application of the ultrafine organic powder in the preparation of engineering plastics, rubber, plastic films, electronic products, cosmetics, coatings and inks.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] The present invention provides an ultrafine organic powder, which is mainly prepared by curing EB resin and EB monomer through EB electron beam curtain, and is a solid organic powder with a particle size of 1 to 200 μm. Tests and verifications show that the ultrafine organic spherical powder provided by the present invention not only has better weather resistance, hardness and transparency, but also has superior scratch resistance, excellent solvent resistance, high filling property and excellent hand feel.

[0026] The present invention provides a device for preparing ultrafine organic powders, and the device comprises: a raw material storage tank, a high-pressure nitrogen atomizing curtain nozzle, and an EB electron beam curtain generator, wherein: the raw material storage tank is connected to the high-pressure nitrogen atomizing curtain nozzle pipeline, and the spray direction of the high-pressure nitrogen atomizing curtain nozzle is directly above the electron beam curtain generated by the EB electron beam curtain generator. The present invention realizes the preparation of ultrafine organic powders with a solid spherical structure through the coordinated cooperation of the various components in the above-mentioned ultrafine organic powder preparation device. At the same time, the preparation method of EB electron beam curtain curing of the present application also has the advantages of simple and efficient preparation process flow and suitability for factory production.

[0027] The ultrafine organic powder provided by the invention can be widely used in the preparation process of engineering plastics, rubber, plastic film, electronic products, cosmetics, coatings and inks. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 A schematic diagram of the structure of the production equipment for ultrafine organic powder provided in Example 1 of the present invention;

[0030] Figure 2 A top view of the EB curing zone of the ultrafine organic powder production equipment provided in Example 1 of the present invention.

[0031] Icons: 1-raw material storage tank; 2-flow pump; 3-high-pressure nitrogen atomization curtain nozzle; 4-EB electron beam curtain generator; 5-rectangular trumpet collection port; 6-powder collector; 7-induced draft fan; 8-packaging machine. DETAILED DESCRIPTION

[0032] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] According to one aspect of the present invention, an ultrafine organic powder is mainly prepared by curing EB resin and EB monomer through EB electron beam curtain;

[0034] The ultrafine organic powder is a solid organic powder with a particle size of 1 to 200 μm.

[0035] The present invention provides an ultrafine organic powder, which is mainly prepared by curing EB resin and EB monomer through EB electron beam curtain, and is a solid organic powder with a particle size of 1 to 200 μm. Tests and verifications show that the ultrafine organic spherical powder provided by the present invention not only has better weather resistance, hardness and transparency, but also has superior scratch resistance, excellent solvent resistance, high filling property and excellent hand feel.

[0036] In a preferred embodiment of the present invention, the organic powder raw materials are EB resin and EB monomer. The EB resin and EB monomer used are different according to the requirements for preparing powders with different properties, and can be a mixture of one or more of the EB resin and EB monomer.

[0037] The EB resin includes UV acrylic resin, UV epoxy acrylic resin, UV polyester resin, UV prepolymer resin, EB epoxy resin and other resins that can be EB-cured.

[0038] The EB monomers include tripropylene glycol diacrylate, dipentaerythritol hexaacrylate, hexanediol diacrylate, neopentyl glycol diacrylate, pentaerythritol triacrylate, trimethylolpropane triacrylate, ethoxylated trimethylolpropane triacrylate, isobornyl methacrylate, n-butyl methacrylate and other monofunctional or polyfunctional unsaturated monomers.

[0039] According to one aspect of the present invention, the above-mentioned ultrafine organic powder preparation device comprises: a raw material storage tank 1, a high-pressure nitrogen atomization curtain nozzle 3 and an EB electron beam curtain generator 4, wherein:

[0040] The raw material storage tank 1 is connected to a high-pressure nitrogen atomizing curtain nozzle 3 through a pipeline, and the spray direction of the high-pressure nitrogen atomizing curtain nozzle 3 is set just above the electron beam curtain generated by the EB electron beam curtain generator 4.

[0041] The present invention provides a device for preparing ultrafine organic powder, which comprises: a raw material storage tank 1, a high-pressure nitrogen atomizing curtain nozzle 3 and an EB electron beam curtain generator 4, wherein: the raw material storage tank 1 is connected to the high-pressure nitrogen atomizing curtain nozzle 3 through a pipeline, and the spray direction of the high-pressure nitrogen atomizing curtain nozzle 3 is set to be directly above the electron beam curtain generated by the EB electron beam curtain generator 4.

[0042] The working process of the above-mentioned ultrafine organic powder preparation device is as follows:

[0043] EB resin and EB monomer are mixed and placed in a raw material storage tank 1, the induced draft fan 7 and the EB electron beam generator are turned on, and the high-pressure nitrogen is turned on. The material in the raw material storage tank 1 is quantitatively transported to the nitrogen-powered atomizing curtain nozzle for atomization through a flow pump. The atomized ultra-fine droplet curtain mist (particle size is 1 to 200 μm) is quickly solidified into an organic spherical powder when passing through the EB electron beam curtain.

[0044] Therefore, the present invention realizes the preparation of ultrafine organic powder with a solid spherical structure through the coordinated cooperation of various components in the above-mentioned ultrafine organic powder preparation device. At the same time, the preparation method of EB electron beam curtain curing of the present application also has the advantages of simple and efficient preparation process flow, and can quickly cure to obtain spherical organic powder in only 0.005-0.1 seconds, which is suitable for factory production.

[0045] In a preferred embodiment of the present invention, a flow pump 2 is provided on the connecting pipe between the raw material storage tank 1 and the high-pressure nitrogen atomizing curtain nozzle 3 .

[0046] As a preferred embodiment, the flow pump 2 is arranged on the connecting pipe between the raw material storage tank 1 and the high-pressure nitrogen atomizing curtain nozzle 3, and is used to control the material to be transported to the high-pressure nitrogen atomizing curtain nozzle 3 for atomization to form a mist curtain.

[0047] In a preferred embodiment of the present invention, the preparation device further comprises a powder collecting device.

[0048] In the above preferred embodiment, the powder collecting device comprises a rectangular horn collecting port 5, a powder collector 6 and a packaging machine 8 arranged below the electron beam curtain, wherein:

[0049] The rectangular trumpet collecting port 5 is connected to the powder collector 6 by a pipeline; the packaging machine 8 is arranged at the powder outlet of the powder collector 6 .

[0050] As a preferred embodiment, a packaging machine 8 is connected to the bottom of the powder collector 6, and the packaging machine 8 is used to package the organic powder collected by the collector.

[0051] As a preferred embodiment, the size of the rectangular horn collecting port 5 is set according to needs, and the rectangular horn collecting port 5 is connected to the powder collector 6 through a pipeline.

[0052] In the above preferred embodiment, the powder collector 6 is provided with an induced draft fan 7 .

[0053] Preferably, the working process of the ultrafine organic powder preparation device of the present invention is:

[0054] After the EB resin and EB monomer are fully mixed and uniformly, they are put into the raw material storage tank 1, the induced draft fan 7 and the EB electron beam curtain generator 4 are turned on, the high-pressure nitrogen and the flow pump 2 are turned on, and the mixture of the resin and the monomer is quantitatively transported to the high-pressure nitrogen atomizing curtain nozzle 3 through the flow pump 2. Under the action of the high-pressure nitrogen, the high-pressure nitrogen atomizing curtain nozzle 3 is atomized into ultra-fine droplet curtain mist, and the ultra-fine droplet curtain mist is rapidly solidified (0.005-0.1 seconds) into spherical organic powder when passing through the EB electron beam curtain generated by the EB electron beam curtain generator 4. The powder is rapidly collected in the powder collector 6 at the rectangular trumpet collecting port 5 by the gravity provided by the induced draft fan 7. The organic powder generated by the EB electron beam curing resin and monomer is the ultra-fine organic spherical powder, which is then packaged by the packaging machine 8 to obtain an ultra-fine organic spherical powder product.

[0055] According to one aspect of the present invention, the ultrafine organic powder is used in the preparation of engineering plastics, rubber, plastic films, electronic products, cosmetics, coatings and inks.

[0056] The ultrafine organic powder provided by the invention can be widely used in the preparation process of engineering plastics, rubber, plastic film, electronic products, cosmetics, coatings and inks.

[0057] It should be noted that the ultrafine organic powder of the present invention can be used as matte powder in the coating and ink industries. The matte paint made of the solid organic spherical structure has high transparency, high scratch resistance and a baby-like feel, which is completely different from the existing silica micropowder matte powder; it can also be used as an aluminum powder orienting agent in the coating industry. Compared with CAB (cellulose acetate) orienting agents, the organic powder with low oil absorption value is filled in the middle of the aluminum powder as an orienting agent, which has the advantages of high solid content, high fullness and low VOC emissions; when used in car cover plastic film, it can activate the matte effect, has good UV resistance, and greatly increases the scratch resistance of the car cover.

[0058] The technical solution of the present invention will be further described below in conjunction with embodiments.

[0059] Example 1

[0060] Figure 1 This is a schematic diagram of the structure of the production equipment for ultrafine organic powder provided in this embodiment.

[0061] Figure 2 A top view of the EB curing zone of the ultrafine organic powder production equipment provided in this embodiment.

[0062] like Figure 1 As shown, a production equipment for ultra-fine organic powder includes: a raw material storage tank 1, a high-pressure nitrogen atomization curtain nozzle 3 and an EB electron beam curtain generator 4, wherein:

[0063] The raw material storage tank 1 is connected to a high-pressure nitrogen atomizing curtain nozzle 3 through a pipeline, and the spray direction of the high-pressure nitrogen atomizing curtain nozzle 3 is set just above the electron beam curtain generated by the EB electron beam curtain generator 4.

[0064] The preparation device of the ultrafine organic powder provided in this embodiment includes: a raw material storage tank 1, a high-pressure nitrogen atomizing curtain nozzle 3 and an EB electron beam curtain generator 4, wherein: the raw material storage tank 1 is connected to the high-pressure nitrogen atomizing curtain nozzle 3 through a pipeline, and the spray direction of the high-pressure nitrogen atomizing curtain nozzle 3 is set to be directly above the electron beam curtain generated by the EB electron beam curtain generator 4. This embodiment realizes the preparation of ultrafine organic powder with a solid spherical structure through the coordinated cooperation of various components in the above-mentioned ultrafine organic powder preparation device. At the same time, the preparation method of EB electron beam curtain curing of the present application also has the advantages of simple and efficient preparation process (only 0.005-0.1 seconds are required to quickly cure to obtain spherical organic powder), which is suitable for factory production.

[0065] See also Figure 1 As a preferred implementation of this embodiment, a flow pump 2 is provided on the connecting pipe between the raw material storage tank 1 and the high-pressure nitrogen atomizing curtain nozzle 3, which is used to control the material to be transported to the high-pressure nitrogen atomizing curtain nozzle 3 for atomization to form a mist curtain.

[0066] See also Figure 1 , Figure 2 As a preferred implementation of this embodiment, the preparation device further includes a powder collecting device, which includes a rectangular horn collecting port 5, a powder collector 6 and a packaging machine 8 arranged below the electron beam curtain, wherein:

[0067] See also Figure 2 The rectangular trumpet collecting port 5 is connected to the powder collector 6 through a pipeline; the packaging machine 8 is disposed at the powder outlet of the powder collector 6 to package the organic powder collected by the collector.

[0068] See also Figure 1 As a preferred implementation of this embodiment, the size of the rectangular horn collecting port 5 is set according to needs, and the rectangular horn collecting port 5 is connected to the powder collector 6 through a pipeline.

[0069] See also Figure 1 As a preferred implementation of this embodiment, the powder collector 6 is provided with an induced draft fan 7 for providing the absorption wind force required by the powder collector 6 .

[0070] The working process of the ultrafine organic powder preparation device of this embodiment is as follows:

[0071] After the EB resin and the EB monomer are fully mixed and uniformly, they are put into the raw material storage tank 1, the induced draft fan 7 and the EB electron beam curtain generator 4 are turned on, the high-pressure nitrogen and the flow pump 2 are turned on, and the mixture of the resin and the monomer is quantitatively transported to the high-pressure nitrogen atomizing curtain nozzle 3 through the flow pump 2. Under the action of the high-pressure nitrogen, the high-pressure nitrogen atomizing curtain nozzle 3 is atomized into ultra-fine droplet curtain mist, and the ultra-fine droplet curtain mist is rapidly solidified (0.005-0.1 seconds) into spherical organic powder when passing through the EB electron beam curtain generated by the EB electron beam curtain generator 4. The powder is rapidly collected in the powder collector 6 at the rectangular trumpet collecting port 5 by the gravity provided by the induced draft fan 7. The organic powder generated by the EB electron beam curing of the EB resin and the EB monomer is the ultra-fine organic spherical powder, which is then packaged by the packaging machine 8 to obtain an ultra-fine organic spherical powder product.

[0072] Example 2

[0073] The difference between this embodiment and embodiment 1 is that the production equipment of this embodiment is not provided with a raw material storage tank 1 connected before the flow pump 2, and the remaining components and their connections are the same as those of embodiment 1.

[0074] The production equipment of this embodiment may easily cause the raw materials to be scattered during the production operation, resulting in a waste of resources.

[0075] Example 3

[0076] The difference between this embodiment and embodiment 1 is that the nozzle in the production equipment of this embodiment is not of curtain type, and the remaining components and their connections are the same as those of embodiment 1. Since the mist is relatively thick, part of the mist cannot be solidified and the performance of the product design cannot be achieved.

[0077] Example 4

[0078] An ultrafine organic powder is prepared by using the ultrafine organic powder production equipment of Example 1, comprising the following steps:

[0079] The raw materials are fully mixed in a composition ratio of UV acrylic resin: trimethylol triacrylate TMPTA: n-butyl methacrylate = 7:2:1 and then placed in a raw material storage tank 1, the induced draft fan 7 and the EB electron beam curtain generator 4 are turned on, and the high-pressure nitrogen (3-6 kg) and the flow pump 50 kg per hour are turned on to quantitatively transport liquid to the high-pressure nitrogen atomizing curtain nozzle 3. Under the action of the high-pressure nitrogen, the mixed liquid is atomized into ultra-fine droplet curtain mist by the high-pressure nitrogen atomizing curtain nozzle 3. When the ultra-fine droplet curtain mist passes through the EB electron beam curtain generated by the EB electron beam curtain generator 4, it is quickly solidified into spherical organic powder in 0.01 seconds. The powder is quickly collected in a collector at a rectangular trumpet collecting port 5 by the gravity provided by the induced draft fan 7, and the ultra-fine organic spherical powder is then packaged by a packaging machine 8 to obtain an ultra-fine organic spherical powder product, and the particle size of the ultra-fine organic spherical powder is 5-10 μm.

[0080] The ultrafine organic powder obtained in this embodiment is a solid ultrafine organic powder, which has excellent solvent resistance and chemical resistance, good scratch resistance and good hand feel.

[0081] Example 5

[0082] An ultrafine organic powder. The difference between the ultrafine organic powder of this embodiment and that of embodiment 4 is that the ultrafine organic powder of this embodiment is prepared by using the ultrafine organic powder production equipment of embodiment 2, and the remaining steps and process parameters are the same as those of embodiment 4.

[0083] Example 6

[0084] An ultrafine organic powder. The difference between the ultrafine organic powder of this embodiment and that of embodiment 4 is that the ultrafine organic powder of this embodiment is prepared by using the ultrafine organic powder production equipment of embodiment 3, and the remaining steps and process parameters are the same as those of embodiment 4.

[0085] Test Example 1

[0086] In this test example, the ultrafine organic powder prepared in the above Example 4 is used to prepare a coating to verify its technical effect. The composition of the coating is as follows:

[0087]

[0088] Note: In the above table, "parts" are parts by mass; the resin is acrylic resin GNU2450 (Guangzhou Jujia New Materials); the solvent is butyl acetate / xylene / PMA=5 / 3 / 2; the curing agent is 45% solid content N3390 (Covestro); the leveling agent is 10% BYK333 (BYK Chemical).

[0089] The coatings prepared by the above test group and control group were subjected to performance testing, wherein the hardness of the test group with the ultrafine organic powder of Example 4 added was 3H, and the hardness of the control group without the ultrafine organic powder added was 1H; in the wear resistance (RCA) test, the test group with the ultrafine organic powder of Example 4 added was 150 laps, while the control group without the ultrafine organic powder added was only 15 laps.

[0090] This fully demonstrates that the addition of the ultrafine organic powder of the present application can significantly improve the hardness and scratch resistance of the paint film, while also reducing the amount of resin solvent and thus reducing VOC emissions.

[0091] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An ultrafine organic powder, characterized in that: The ultrafine organic powder is mainly prepared by curing EB resin and EB monomer through EB electron beam curtain; The ultrafine organic powder is a solid organic powder with a particle size of 1 to 200 μm.

2. The ultrafine organic powder according to claim 1, characterized in that: The organic powder raw material is a mixture of one or more of EB resin and EB monomer; The EB resin is a resin that can achieve EB curing; The EB monomer is a monofunctional or polyfunctional unsaturated monomer.

3. The device for preparing ultrafine organic powder according to claim 1 or 2, characterized in that: The preparation device comprises: a raw material storage tank (1), a high-pressure nitrogen atomization curtain nozzle (3) and an EB electron beam curtain generator (4), wherein: The raw material storage tank (1) is connected to a high-pressure nitrogen atomizing curtain nozzle (3) through a pipeline, and the spray direction of the high-pressure nitrogen atomizing curtain nozzle (3) is directly above the electron beam curtain generated by the EB electron beam curtain generator (4).

4. The device for preparing ultrafine organic powder according to claim 3, characterized in that: A flow pump (2) is provided on the connecting pipe between the raw material storage tank (1) and the high-pressure nitrogen atomizing curtain nozzle (3).

5. The device for preparing ultrafine organic powder according to claim 3, characterized in that: The preparation device also includes a powder collecting device.

6. The device for preparing ultrafine organic powder according to claim 5, characterized in that: The powder collecting device comprises a rectangular horn collecting port (5) arranged below the electron beam curtain, a powder collector (6) and a packaging machine (8), wherein: The rectangular trumpet collecting port (5) is connected to a powder collector (6) via a pipeline; The packaging machine (8) is arranged at the powder outlet of the powder collector (6).

7. The device for preparing ultrafine organic powder according to claim 6, characterized in that: The powder collector (6) is provided with an induced draft fan (7).

8. The method for preparing the ultrafine organic powder according to claim 1 or 2, characterized in that: The preparation method is based on the ultrafine organic powder preparation device according to any one of claims 3 to 7; Preferably, the preparation method comprises: fully mixing EB resin and EB monomer and placing them in a raw material storage tank (1), turning on the induced draft fan (7), the EB electron beam curtain generator (4) and the high-pressure nitrogen and flow pump (2); quantitatively conveying the mixture of EB resin and EB monomer to the high-pressure nitrogen atomizing curtain nozzle (3) through the flow pump (2), and atomizing into ultra-fine droplet curtain mist through the high-pressure nitrogen atomizing curtain nozzle (3) under the action of high-pressure nitrogen, and the ultra-fine droplet curtain mist is rapidly solidified into spherical organic powder when passing through the EB electron beam curtain generated by the EB electron beam curtain generator (4).

9. Use of the ultrafine organic powder according to claim 1 or 2 in the preparation of engineering plastics, rubber, plastic films, electronic products, cosmetics, coatings and inks.

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