阅读说明：本技术 金属塑料复合体及其制备方法和应用 (Metal plastic composite body and preparation method and application thereof ) 是由 黄少华 周明 连俊兰 陈帆 林宏业 于 2018-05-31 设计创作，主要内容包括：本发明涉及金属塑料复合体制备领域,公开了一种金属塑料复合体及其制备方法和应用。本发明的金属塑料复合体包括金属基材,形成在所述金属基材上的金属树脂颗粒复合镀层,以及形成在所述金属树脂颗粒复合镀层上的塑料层,其中,所述金属树脂颗粒复合镀层包括基质金属层及分散在基质金属层中的树脂颗粒,且至少部分树脂颗粒与所述塑料层结合。根据本发明的金属塑料复合体,通过分散电镀使树脂颗粒与金属共沉积在金属基材表面上,由此可以获得基质金属中均匀分布树脂颗粒结构的金属树脂颗粒复合镀层,通过该镀层表面的树脂颗粒与后述的塑料层相融合,可以显著提高金属和塑料层之间的结合力。(The invention relates to the field of metal plastic complex preparation, and discloses a metal plastic complex and a preparation method and application thereof. The metal-plastic composite comprises a metal substrate, a metal resin particle composite coating layer formed on the metal substrate, and a plastic layer formed on the metal resin particle composite coating layer, wherein the metal resin particle composite coating layer comprises a matrix metal layer and resin particles dispersed in the matrix metal layer, and at least part of the resin particles are combined with the plastic layer. According to the metal-plastic composite of the present invention, the resin particles and the metal are co-deposited on the surface of the metal base material by the dispersion plating, whereby the metal-resin particle composite plating layer having a structure in which the resin particles are uniformly distributed in the matrix metal can be obtained, and the resin particles on the surface of the plating layer are fused with the plastic layer described later, whereby the bonding force between the metal and the plastic layer can be remarkably improved.)

1. A metal plastic composite, comprising a metal base material, a composite plating layer of metal resin particles formed on the metal base material, and a plastic layer formed on the composite plating layer of metal resin particles;

The metal resin particle composite coating comprises a matrix metal layer and resin particles dispersed in the matrix metal layer, and at least part of the resin particles are combined with the plastic layer.

2. The metal plastic composite according to claim 1, wherein the resin particles bonded to the plastic layer and the plastic layer are of an integral structure.

3. the metal-plastic composite according to claim 1, wherein the metal-resin particle composite plating layer is formed by co-depositing resin particles and a matrix metal on the surface of a metal base material by dispersion plating.

4. the metal-plastic composite of claim 3, wherein the matrix metal is selected from one or more of nickel, copper, gold, iron, palladium, and tin.

5. the metal plastic composite of any one of claims 1-3, wherein the resin particles are made of a material selected from one or more of polycarbonate, acrylonitrile-butadiene-styrene copolymer, polyamide, polyphenylene sulfide, polyphenylene oxide, polypropylene, polyethylene, styrene-butadiene-styrene block copolymer, styrene-ethylene-butylene-styrene block copolymer, and thermoplastic polyurethane elastomer;

Preferably, the particle diameter of the resin particle is 30 μm or less;

Preferably, the thickness of the matrix metal layer is 5 to 50 μm.

6. The metal-plastic composite of any one of claims 1-3, wherein the metal substrate is a stainless steel metal substrate, an aluminum metal substrate, a nickel metal substrate, or a copper metal substrate;

preferably, the thickness of the metal substrate is 0.1 to 50 mm.

7. The metal plastic composite of any one of claims 1-3, wherein the plastic layer is made of one or more materials selected from the group consisting of polycarbonate, acrylonitrile-butadiene-styrene copolymer, polyamide, polyphenylene sulfide, polyphenylene oxide, polypropylene, polyethylene, styrene-butadiene-styrene block copolymer, styrene-ethylene-butylene-styrene block copolymer, and thermoplastic polyurethane elastomer;

preferably, the thickness of the plastic layer is 0.5-50 mm.

8. The metal plastic composite of any one of claims 1-3, wherein the resin particles are the same material as the plastic layer.

9. A method for preparing a metal plastic composite, which is characterized by comprising the following steps,

1) a step of co-depositing resin particles and a matrix metal on the surface of a metal base material by dispersion plating to form a composite plating layer;

2) And (2) performing injection molding on the metal substrate with the composite coating obtained in the step 1), and combining at least part of resin particles on the surface of the composite coating with an injection molding plastic layer.

10. The method according to claim 9, wherein in step 1), the matrix metal is selected from one or more of nickel, copper, gold, iron, palladium and tin.

11. The method according to claim 9 or 10, wherein in step 1), the material of the resin particles is selected from one or more of polycarbonate, acrylonitrile-butadiene-styrene copolymer, polyamide, polyphenylene sulfide, polyphenylene oxide, polypropylene, polyethylene, styrene-butadiene-styrene block copolymer, styrene-ethylene-butylene-styrene block copolymer, and thermoplastic polyurethane elastomer;

preferably, the particle diameter of the resin particle is 30 μm or less;

Preferably, the composite plating layer is formed to include a matrix metal layer and resin particles dispersed in the matrix metal layer;

preferably, the thickness of the matrix metal layer is 5 to 50 μm.

12. The method of claim 9 or 10, wherein the metal substrate is a stainless steel metal substrate, an aluminum metal substrate, a nickel metal substrate, or a copper metal substrate;

Preferably, the thickness of the metal substrate is 0.1 to 50 mm.

13. The method of claim 9 or 10, wherein the injection molded plastic is selected from one or more of polycarbonate, acrylonitrile-butadiene-styrene copolymer, polyamide, polyphenylene sulfide, polyphenylene oxide, polypropylene, polyethylene, styrene-butadiene-styrene block copolymer, styrene-ethylene-butylene-styrene block copolymer, and thermoplastic polyurethane elastomer;

preferably, the thickness of the injection molded plastic layer is formed to be 0.5 to 50 mm.

14. The method according to claim 9 or 10, wherein the dispersion plating is performed by performing composite plating by immersing the metal substrate in a plating solution under conditions comprising: the plating solution has a liquid temperature of 50 to 90 ℃, a pH of 3.5 to 5.5, and a plating time of 30 to 120 minutes.

15. The method according to claim 9 or 10, wherein the plating solution of the dispersion plating is a mixed solution of a metal plating solution and an aqueous dispersion of resin particles.

16. A metal-plastic composite body, characterized in that it is obtained by a process according to any one of claims 9 to 15.

17. Use of a metal plastic composite according to claim 1 or claim 16 as a metal casing for telecommunications equipment.

Technical Field

The invention relates to the field of metal plastic complex preparation, in particular to a metal plastic complex and a preparation method and application thereof.

background

In the fields of mobile phones, automobiles and the like, plastic and substrates such as metal, ceramic, glass and the like are often required to be combined together to form a composite body. The traditional method is to use adhesive or combine by means of rivets, back-off and the like. Therefore, the process flow is increased, and the bonding strength and the sealing property of the bonding interface can not meet the requirements. Therefore, a method of directly and integrally molding various substrates and plastics without using an adhesive or a rivet has become a real need in industrial development.

The existing resin metal integrated molding technology needs to carry out pore-forming treatment on the metal surface. The pore-forming technology adopts an anodic oxidation-strong acid treatment process, a laser engraving process, a soaking process, an etching process and the like, and has the defects of complicated process, high cost, short storage time of a treated metal substrate and need of entering the next stage of production in a short time.

Disclosure of Invention

The invention aims to overcome the problems in the prior art and provides a novel metal-plastic composite body and a preparation method and application thereof. According to the preparation method of the metal-plastic composite body, the physical or chemical pore-forming method is not needed on the surface of the metal base material, and the chemical treatment (such as hole expanding treatment or chemical liquid medicine soaking to increase the adhesive force of plastic cement) is not needed after plating, so that the preparation method has the advantages of simple process and environmental friendliness, and the obtained metal-plastic composite body has high metal-plastic bonding force.

in order to achieve the above object, an aspect of the present invention provides a metal plastic composite including a metal base material, a metal resin particle composite plating layer formed on the metal base material, and a plastic layer formed on the metal resin particle composite plating layer; the metal resin particle composite coating comprises a matrix metal layer and resin particles dispersed in the matrix metal layer, and at least part of the resin particles are combined with the plastic layer.

Preferably, the resin particles combined with the plastic layer and the plastic layer are of an integral structure.

Preferably, the metal-resin particle composite plating layer is formed by co-depositing resin particles and a matrix metal on the surface of a metal substrate by dispersion plating.

Preferably, the matrix metal is selected from one or more of nickel, copper, gold, iron, palladium and tin.

Preferably, the material of the resin particles is selected from one or more of polycarbonate, acrylonitrile-butadiene-styrene copolymer, polyamide, polyphenylene sulfide, polyphenylene oxide, polypropylene, polyethylene, styrene-butadiene-styrene block copolymer, styrene-ethylene-butylene-styrene block copolymer, and thermoplastic polyurethane elastomer;

Preferably, the particle diameter of the resin particle is 30 μm or less;

Preferably, the thickness of the matrix metal layer is 5 to 50 μm.

Preferably, the metal substrate is a stainless steel metal substrate, an aluminum metal substrate, a nickel metal substrate or a copper metal substrate;

Preferably, the thickness of the metal substrate is 0.1 to 50 mm.

Preferably, the material of the plastic layer is selected from one or more of polycarbonate, acrylonitrile-butadiene-styrene copolymer, polyamide, polyphenylene sulfide, polyphenylene oxide, polypropylene, polyethylene, styrene-butadiene-styrene block copolymer, styrene-ethylene-butylene-styrene block copolymer and thermoplastic polyurethane elastomer;

Preferably, the thickness of the plastic layer is 0.5-50 mm.

Preferably, the resin particles are the same material as the plastic layer.

The invention also provides a preparation method of the metal plastic composite, which comprises the following steps,

1) a step of co-depositing resin particles and a matrix metal on the surface of a metal base material by dispersion plating to form a composite plating layer;

2) And (2) performing injection molding on the metal substrate with the composite coating obtained in the step 1), and combining at least part of resin particles on the surface of the composite coating with an injection molding plastic layer.

Preferably, the matrix metal is selected from one or more of nickel, copper, gold, iron, palladium and tin.

Preferably, the material of the resin particles is selected from one or more of polycarbonate, acrylonitrile-butadiene-styrene copolymer, polyamide, polyphenylene sulfide, polyphenylene oxide, polypropylene, polyethylene, styrene-butadiene-styrene block copolymer, styrene-ethylene-butylene-styrene block copolymer, and thermoplastic polyurethane elastomer;

Preferably, the particle diameter of the resin particle is 30 μm or less;

preferably, the composite plating layer is formed to include a matrix metal layer and resin particles dispersed in the matrix metal layer;

More preferably, the thickness of the matrix metal layer is 5 to 50 μm.

preferably, the metal substrate is a stainless steel metal substrate, an aluminum metal substrate, a nickel metal substrate or a copper metal substrate;

Preferably, the thickness of the metal substrate is 0.5 to 50 mm.

Preferably, the injection molded plastic is selected from one or more of polycarbonate, acrylonitrile-butadiene-styrene copolymer, polyamide, polyphenylene sulfide, polyphenylene oxide, polypropylene, polyethylene, styrene-butadiene-styrene block copolymer, styrene-ethylene-butylene-styrene block copolymer, and thermoplastic polyurethane elastomer;

preferably, the thickness of the injection molded plastic layer is formed to be 0.5 to 50 mm.

Preferably, the dispersion plating is performed by performing composite plating by immersing the metal substrate in a plating solution, and the conditions of the dispersion plating include: the plating solution has a liquid temperature of 50 to 90 ℃, a pH of 3.5 to 5.5, and a plating time of 30 to 120 minutes.

Preferably, the plating solution for the dispersion plating is a mixed solution of a metal plating solution and an aqueous dispersion of resin particles.

The invention also provides a metal plastic composite body which is prepared by the method.

The invention also provides application of the metal plastic composite body as a metal shell of communication equipment.

According to the preparation method of the metal-plastic composite body, the physical or chemical pore-forming method is not needed on the surface of the metal base material, and the chemical treatment (such as hole expanding treatment or chemical liquid medicine soaking to increase the adhesive force of plastic cement) is not needed after plating, so that the preparation method has the advantages of simple process and environmental friendliness, and the obtained metal-plastic composite body has high metal-plastic bonding force.

Detailed Description

The endpoints of the ranges and any values disclosed herein are not limited to the precise range or value, and such ranges or values should be understood to encompass values close to those ranges or values. For ranges of values, between the endpoints of each of the ranges and the individual points, and between the individual points may be combined with each other to give one or more new ranges of values, and these ranges of values should be considered as specifically disclosed herein.

The metal-plastic composite comprises a metal substrate, a metal resin particle composite coating layer formed on the metal substrate, and a plastic layer formed on the metal resin particle composite coating layer, wherein the metal resin particle composite coating layer comprises a matrix metal layer and resin particles dispersed in the matrix metal layer, and at least part of the resin particles are combined with the plastic layer.

In the present invention, the phrase "the metal-resin particle composite plating layer includes a matrix metal layer and resin particles dispersed in the matrix metal layer, and at least a part of the resin particles are bonded to the plastic layer" means that the resin particles are dispersed in the interior and the surface of the matrix metal layer, and are bonded to the plastic layer through at least a part of the resin particles dispersed in the surface of the matrix metal layer.

In order to further improve the bonding force between the metal and the plastic layer, it is preferable that all the resin particles dispersed on the surface of the base metal layer are bonded to the plastic layer.

According to the metal-plastic composite of the present invention, it is preferable that the resin particles bonded to the plastic layer and the plastic layer are integrally formed, and the resin particles bonded to the plastic layer and the plastic layer are integrally formed, whereby the bonding force between the metal and the plastic layer can be further improved.

More preferably, the metal-resin particle composite plating layer is formed by co-depositing resin particles and a matrix metal on the surface of a metal base material by dispersion plating.

according to the metal-plastic composite of the present invention, the resin particles and the matrix metal are co-deposited on the surface of the metal substrate by the dispersion plating, whereby the metal-resin particle composite plating layer having a structure in which the resin particles are uniformly distributed in the matrix metal layer can be obtained, and the resin particles on the surface of the plating layer are fused with the plastic layer described later, whereby the bonding force between the metal and the plastic layer can be remarkably improved.

According to the metal plastic composite body of the present invention, the matrix metal may be various metals generally used in the art for dispersion plating. Preferably, the matrix metal is selected from one or more of nickel, copper, gold, iron, palladium and tin; more preferably, the matrix metal is nickel.

According to the metal plastic composite of the present invention, preferably, the material of the resin particles is selected from one or more of Polycarbonate (PC), acrylonitrile-butadiene-styrene copolymer (ABS), Polyamide (PA), polyphenylene sulfide (PPS), polyphenylene oxide (PPO), polypropylene (PP), Polyethylene (PE), styrene-butadiene-styrene block copolymer (SBS), styrene-ethylene-butylene-styrene block copolymer (SEBS), and thermoplastic polyurethane elastomer (TPU); more preferably, the material of the resin particles is selected from one or more of PC, ABS, PA and PPS; further preferably, the material of the resin particles is PA.

further, it is preferable that the particle diameter of the resin particle is 30 μm or less; more preferably, the particle diameter of the resin particle is 20 μm or less; further preferably, the particle diameter of the resin particle is 1 to 10 μm. By setting the particle diameter of the resin particles within the above range, there is an excellent effect of stabilizing the dispersion.

According to the metal-plastic composite of the present invention, the thickness of the matrix metal layer is preferably 5 to 50 μm, and more preferably 10 to 30 μm, in view of further improving the bonding force between the metal and the plastic layer.

according to the metal-plastic composite body of the present invention, the metal substrate may be a stainless steel metal substrate, an aluminum metal substrate, a nickel metal substrate, or a copper metal substrate; preferably a stainless steel metal substrate, an aluminum metal substrate or a nickel metal substrate.

The thickness of the metal substrate may be appropriately selected by those skilled in the art according to the use thereof. For example, when the metal substrate is further used as a housing of a communication device, the thickness of the metal substrate is preferably 0.1 to 50mm, preferably 0.2 to 25mm, more preferably 0.5 to 10mm, and further preferably 1 to 5 mm.

According to the metal plastic composite body, preferably, the material of the plastic layer is selected from one or more of PC, ABS, PA, PPS, PPO, PP, PE, SBS, SEBS and TPU; more preferably, the material of the plastic layer is selected from one or more of PC, ABS, PA, PPS, PP, PE and PPO; further preferably, the material of the plastic layer is selected from one or more of PC, ABS, PA and PPS.

In addition, it is preferable that the resin particles are the same material as the plastic layer. The resin particles and the plastic layer are made of the same material, so that the resin particles on the surface of the metal resin particle composite coating layer and the plastic layer can be better fused into a whole, and the binding force between metal and resin is improved.

The thickness of the plastic layer may be 0.5 to 50mm, preferably 0.5 to 20mm, more preferably 1 to 10mm, and further preferably 1 to 3 mm.

The invention also provides a preparation method of the metal plastic composite, which comprises the following steps,

1) a step of co-depositing resin particles and a matrix metal on the surface of a metal base material by dispersion plating to form a composite plating layer;

2) And (2) performing injection molding on the metal substrate with the composite coating obtained in the step 1), and combining at least part of resin particles on the surface of the composite coating with an injection molding plastic layer.

according to the method, the resin particles and the metal are co-deposited on the surface of the metal base material through dispersion electroplating, so that a composite coating with a structure of uniformly distributing the resin particles in a matrix metal (or called as main metal) layer can be obtained, and the resin particles on the surface of the composite coating and the injection plastic layer can be fused into a whole by injecting plastic into the metal base material with the composite coating formed in the step 1), so that the binding force between the metal and the injection plastic layer can be remarkably improved.

The matrix metal may be various metals commonly used in the art for dispersion plating according to the method of the present invention. Preferably, the matrix metal is selected from one or more of nickel, copper, gold, iron, palladium and tin; more preferably, the metal is nickel.

According to the method of the present invention, preferably, the material of the resin particles is selected from one or more of PC, ABS, PA, PPS, PPO, PP, PE, SBS, SEBS, and TPU; more preferably, the material of the resin particles is selected from one or more of PC, ABS, PA and PPS; further preferably, the material of the resin particles is PA.

further, it is preferable that the particle diameter of the resin particle is 30 μm or less; more preferably, the particle diameter of the resin particle is 20 μm or less; further preferably, the particle diameter of the resin particle is 1 to 10 μm. By making the particle diameter of the resin particles within the above range, there is an excellent effect of stable dispersion.

According to the method of the present invention, the composite plating layer formed by step 1) includes a matrix metal layer and resin particles dispersed in the matrix metal layer. The thickness of the matrix metal layer is preferably 5 to 50 μm, more preferably 10 to 30 μm, from the viewpoint of further improving the bonding force between the metal and the injection-molded plastic layer.

according to the method of the present invention, the metal substrate may be a stainless steel metal substrate, an aluminum metal substrate, a nickel metal substrate, or a copper metal substrate; preferably a stainless steel metal substrate, an aluminum metal substrate or a nickel metal substrate.

The thickness of the metal substrate may be appropriately selected by those skilled in the art according to the use thereof. For example, when the metal substrate is further used as a housing of a communication device, the thickness of the metal substrate is preferably 0.1 to 50mm, preferably 0.2 to 25mm, more preferably 0.5 to 10mm, and further preferably 1 to 5 mm.

According to the method of the present invention, preferably, the injection molded plastic is selected from one or more of PC, ABS, PA, PPS, PPO, PP, PE, SBS, SEBS and TPU; more preferably, the injection molded plastic is selected from one or more of PC, ABS, PA, PPS, PP, PE and PPO; further preferably, the injection molded plastic is selected from one or more of PC, ABS, PA and PPS.

In addition, it is preferable that the resin particles are the same material as the injection-molded plastic. The resin particles and the injection molding plastic layer are made of the same material, so that the resin particles on the surface of the composite coating and the injection molding plastic layer can be better fused into a whole, and the binding force between metal and the injection molding plastic layer is improved.

According to the method of the present invention, the thickness of the plastic layer formed may be 0.5 to 50mm, preferably 0.5 to 20mm, more preferably 1 to 10mm, and further preferably 1 to 3 mm.

According to the method of the present invention, the above-mentioned dispersion plating is performed by being carried out in a plating solution containing the metal ions and the resin particles dispersed therein. Preferably, the plating solution for the dispersion plating is a mixed solution of a metal plating solution and an aqueous dispersion of resin particles.

According to the method of the present invention, the aqueous dispersion of resin particles contains resin particles and a surfactant. Preferably, the content of the resin particles in the aqueous dispersion of resin particles is 0.05 to 0.25g/mL, preferably 0.1 to 0.2 g/mL.

In addition, the surfactant may be various surfactants commonly used in the art, and preferably, the surfactant is one or more of a nonionic surfactant and a cationic surfactant.

The nonionic surfactant is preferably one or more of alkylphenol ethoxylates, fatty alcohol-polyoxyethylene ethers and polyether nonionic surfactants. Examples of the alkylphenol ethoxylates include OP-10; examples of the fatty alcohol polyoxyethylene ether include AEO-9; examples of the polyether nonionic surfactant include polypropylene glycol ethylene oxide adducts.

the cationic surfactant is preferably a quaternary ammonium salt type cationic surfactant.

according to the method of the present invention, the surfactant is preferably used in an amount of 5 to 20% by weight, more preferably 8 to 15% by weight, of the resin particles.

The aqueous dispersion of resin particles may be prepared by a method commonly used in the art for forming an aqueous dispersion. In a preferred embodiment of the present invention, from the viewpoint of improving the dispersibility of the resin particles in the aqueous resin particle dispersion, the aqueous resin particle dispersion is formed by the steps of;

(1) Mixing the nonionic surfactant with the resin particles to obtain a mixed product, wherein the dosage of the nonionic surfactant is 5-20 wt% of the resin particles;

(2) Drying the mixed product to obtain mixed powder, wherein the drying conditions comprise: the drying temperature is 80-100 ℃, and the drying time is 1-10 hours;

(4) A step of dispersing the mixed powder with water in the presence of a cationic surfactant, wherein the amount of the cationic surfactant is 0.2 to 2.0% by weight of the resin particles.

According to the method of the present invention, the amount of the aqueous dispersion of resin particles in the plating solution may be determined according to the amount of the plating metal source compound, and preferably, the amount of the aqueous dispersion is 5 to 50g/L, more preferably 5 to 15g/L, of the plating solution.

According to the method of the present invention, preferably, the metal plating solution in the plating solution is a nickel plating solution, and the aqueous resin particle dispersion solution is an aqueous dispersion solution prepared by the above preferred embodiment.

In a particularly preferred embodiment of the present invention, the composition of the plating solution for the dispersion plating is as follows:

According to the method of the present invention, preferably, the dispersion plating is performed by performing composite plating by immersing the metal substrate in a plating solution, and the conditions of the dispersion plating include: the plating solution has a liquid temperature of 50 to 90 ℃, a pH of 3.5 to 5.5, and a plating time of 30 to 120 minutes.

According to the present invention, the conditions for injection molding may be various conditions generally used for injection molding in the art, and will not be described herein again.

The invention also provides a metal plastic composite prepared by the preparation method.

In addition, the invention also provides application of the metal plastic composite body as a metal shell of communication equipment.

the present invention will be described in detail below by way of examples.

Preparation example 1

This preparation example is intended to illustrate the preparation of an aqueous nylon dispersion.

(1) Weighing 10g of surfactant OP-10 and 10g of surfactant F-68, heating and stirring, stopping operation after the components are mutually dissolved, and standing for later use;

(2) weighing 20g of nylon powder (with the particle size of 5 mu m), putting into a 100ml tank, slowly adding 2g of the mixed solution while stirring at a high speed, and quickly stirring for 1 h;

(3) Placing the mixture of the nylon powder and the surfactant in a baking oven at 100 ℃ for baking for 3h, and then continuing stirring for 1 h;

(4) and dispersing the baked powder by 100ml of deionized water, adding 0.2g of cationic surfactant F-134, stirring for 0.5h, and standing to obtain a nylon aqueous dispersion W1.

preparation example 2

This preparation example is intended to illustrate the preparation of an aqueous nylon dispersion.

(1) Weighing 5g of surfactant OP-10 and 15g of surfactant F-68, heating and stirring, stopping operation after the components are mutually dissolved, and standing for later use;

(2) weighing 20g of nylon powder (with the particle size of 5 mu m), putting into a 100ml tank, slowly adding 2g of the mixed solution while stirring at a high speed, and quickly stirring for 1 h;

(3) placing the mixture of the nylon powder and the surfactant in a baking oven at 100 ℃ for baking for 3h, and then continuing stirring for 1 h;

(4) and dispersing the baked powder by 100ml of deionized water, adding 0.2g of cationic surfactant F-134, stirring for 0.5h, and standing to obtain a nylon aqueous dispersion W2.

Preparation example 3

this preparation example is intended to illustrate the preparation of an aqueous nylon dispersion.

(1) Weighing 10g of surfactant OP-10 and 10g of surfactant F-68, heating and stirring, stopping operation after the components are mutually dissolved, and standing for later use;

(2) Weighing 20g of nylon powder (with the particle size of 5 mu m), putting into a 100ml tank, slowly adding 2g of the mixed solution while stirring at a high speed, and quickly stirring for 1 h;

(3) placing the mixture of the nylon powder and the surfactant in a baking oven at 100 ℃ for baking for 3h, and then continuously stirring for 1 h;

(4) And dispersing the baked powder by 100ml of deionized water, adding 0.1g of cationic surfactant F-134, stirring for 0.5h, and standing to obtain a nylon aqueous dispersion W3.