Antistatic flame-retardant additive and preparation method of antistatic flame-retardant PC particles

Abstract

The invention belongs to the technical field of preparation of antistatic flame-retardant materials, and particularly relates to an antistatic flame-retardant additive and a preparation method of antistatic flame-retardant PC particles, the antistatic flame-retardant additive comprises 100 parts of a flame retardant, 10-50 parts of an antistatic agent, and 10-15 parts of a wetting dispersant; the raw materials are added into a sand mill for ball milling to obtain a finished product. The flame retardant is RDP or BDP, the antistatic agent is a mixture of graphite and the like, and the wetting dispersant is a mixture of hydroxyl functional carboxylic ester dispersants containing pigment affinity groups. The flame retardant, the antistatic agent and the wetting dispersant are compounded in advance through a high-energy ball milling process to prepare the nano-scale concentrated additive. The pre-dispersion process effectively solves the problem of agglomeration of the antistatic filler and the flame retardant in the matrix, and ensures that the antistatic filler and the flame retardant are highly uniformly distributed in the subsequent PC matrix, so that the material is endowed with excellent and stable flame-retardant and antistatic properties, and meanwhile, the negative influence on the mechanical properties of the PC material is reduced.

Description

Technical Field

[0001] This invention belongs to the field of antistatic and flame-retardant material preparation technology, and particularly relates to an antistatic and flame-retardant additive and a method for preparing antistatic and flame-retardant PC particles. Background Technology

[0002] Polymer materials, due to their high surface and volume resistivity, are excellent insulators. However, they are also prone to static electricity buildup during use. This static buildup can range from affecting the material's usability to causing serious fire hazards. Therefore, antistatic and flame-retardant modification of polymer materials is an effective method. Current technologies mostly involve applying antistatic and flame-retardant coatings to the surface or adding flame retardants and antistatic materials during processing to achieve these properties.

[0003] Patent publication number CN106188807A discloses an antistatic and flame-retardant EVA / PVC composite foam material and its preparation method. The method utilizes an EVA / PVC composite foam material formulation, combining the flame-retardant properties of PVC with the elasticity of EVA, and adds compatibilizers, toughening agents, flame retardants, and antistatic agents to prepare a composite material with both flame-retardant and antistatic properties. However, in the preparation process, the antistatic filler and flame retardant are added separately. This method often results in uneven dispersion of the added filler, potentially leading to surface defects and a decrease in mechanical properties. Summary of the Invention

[0004] Technical objective: In order to overcome the shortcomings of the existing technology, the present invention provides an antistatic flame retardant additive and a method for preparing antistatic flame retardant PC particles. The resulting composite material has flame retardant and antistatic properties, and does not affect the mechanical properties of the material.

[0005] Technical Solution: To achieve the above objectives, this invention discloses an antistatic and flame-retardant additive, comprising, by weight, 100 parts flame retardant, 10-50 parts antistatic agent, and 10-15 parts wetting and dispersing agent; the raw materials are ball-milled in a sand mill to obtain the finished product; the flame retardant is RDP or BDP, the antistatic agent is one or a mixture of several of graphite, conductive carbon black, graphene, carbon nanotubes, nano-ATO, and nano-ITO, and the wetting and dispersing agent is one or a mixture of several of hydroxyl functional carboxylic acid ester dispersants containing pigment affinity groups, modified polyurethane dispersants, phosphate ester / polyphosphate ester dispersants, and alkyl hydroxyammonium salt dispersants containing acidic group copolymers.

[0006] Further, the wetting and dispersing agent is one or a mixture of several of BYK-101, BYK-103, BYK-P104, BYK-P104S, BYK-107, BYK-108, BYK-110, BYK-111, BYK-161, BYK-163, BYK-164, BYK-166, BYK-170, BYK-180, BYK-182, and BYK-2200.

[0007] Furthermore, the sand mill is a zirconia ball sand mill, and the diameter of the zirconia balls is 0.1-0.3 mm.

[0008] Furthermore, the ball milling speed is 2800 rpm, the ball milling temperature is 25℃, and the ball milling is carried out until the particle size is less than 100 nm.

[0009] A method for preparing antistatic and flame-retardant PC granules, comprising the following components by weight: 100 parts PC granules and 12-20 parts antistatic and flame-retardant additives; the components are added to a twin-screw extruder for granulation and pelletizing to obtain the finished product.

[0010] Furthermore, the temperatures of the six temperature zones from the feed end to the discharge end of the twin-screw extruder are 260℃, 270℃, 270℃, 275℃, 275℃, and 280℃, respectively, and the spindle speed of the twin-screw extruder is 30 r / min.

[0011] Compared with the prior art, the present invention has at least the following beneficial effects:

[0012] 1. Process Optimization and Performance Enhancement: This invention creatively pre-combines flame retardants, antistatic agents, and wetting and dispersing agents using a high-energy ball milling process to prepare a nano-scale (particle size <100nm) concentrated additive. This "pre-dispersion" process effectively solves the problem of uneven dispersion and agglomeration of antistatic fillers and flame retardants in the matrix, ensuring a highly uniform distribution in the subsequent PC matrix. This results in imparting excellent and stable flame retardancy (V-0 rating) and antistatic properties (surface resistivity up to 10 Ω·cm) to the material. 5 -10 10 While achieving Ω) performance, it minimizes the negative impact on the mechanical properties of the PC material itself.

[0013] 2. Ease of Application and Quality Stability: Adding the above-mentioned nano-concentrated additive changes the traditional method of separately adding multiple components, simplifying the downstream PC particle blending and modification process. Users only need to add the additive once to simultaneously achieve flame retardant and antistatic functions, avoiding the cumbersome process and potential errors of adding multiple components repeatedly, significantly improving the uniformity and batch stability of composite material products.

[0014] 3. Cost and efficiency advantages: The additives prepared by "wet ball milling" have good dispersion stability and are used in concentrated form, which is conducive to precise control of the addition ratio, reducing the overall usage or waste of functional components, and reducing the overall production cost from both process simplification and effective material utilization. Detailed Implementation

[0015] The following describes the principles and features of the present invention. The examples given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0016] An antistatic and flame-retardant additive, by weight, comprises 100 parts flame retardant, 10-50 parts antistatic agent, and 1-10 parts wetting and dispersing agent. The above raw materials are mixed to form a slurry, and then ball-milled in a sand mill to obtain the antistatic and flame-retardant additive.

[0017] The flame retardant is RDP or BDP; the antistatic additive is one or a mixture of graphite, conductive carbon black, graphene, carbon nanotubes, nano-ATO, and nano-ITO; and the wetting and dispersing agent is one or a mixture of hydroxyl-functionalized carboxylic acid ester dispersants containing pigment affinity groups, modified polyurethane dispersants, phosphate ester / polyphosphate ester dispersants, and alkyl hydroxyammonium salt dispersants containing acidic group copolymers. Specifically, the wetting and dispersing agent is manufactured by the German ALTANA Group. The BYK brand products used may employ wetting and dispersing agents that are one or a mixture of several of the following: BYK-101, BYK-103, BYK-P104, BYK-P104S, BYK-107, BYK-108, BYK-110, BYK-111, BYK-161, BYK-163, BYK-164, BYK-166, BYK-170, BYK-180, BYK-182, and BYK-2200. The mill used is a zirconia ball mill, with zirconia balls having a diameter of 0.1-0.3 mm, a milling speed of 2800 rpm, a milling temperature of 25℃, and milling for at least 10 hours until the particle size is less than 100 nm.

[0018] Examples 1 to 6

[0019] Using the above-mentioned raw materials and preparation methods, multiple sets of embodiments were carried out, and the specific parameters of each embodiment are shown in Table 1.

[0020] Table 1: Parameters of Examples 1-6

[0021]

[0022] Example 7

[0023] A method for preparing antistatic and flame-retardant PC granules, comprising, by weight, 100 parts PC granules and 12 parts of the antistatic and flame-retardant additive from Example 1. The above components are added to a twin-screw extruder for granulation and pelletizing to obtain the finished product. The temperatures of the six temperature zones from the feed end to the discharge end of the twin-screw extruder are 260℃, 270℃, 270℃, 275℃, 275℃, and 280℃, respectively, and the spindle speed of the twin-screw extruder is 30 r / min. The surface resistivity was tested to reach 10. 5 Orders of magnitude, flame retardant rating V-0, impact strength 50 kJ / m 2 Tensile yield stress 59 mPa, elongation at break 90%, flexural modulus 2300 MPa.

[0024] Example 8

[0025] A method for preparing antistatic and flame-retardant PC granules, comprising, by weight, 100 parts PC granules and 15 parts of the antistatic and flame-retardant additive from Example 2. The above components are added to a twin-screw extruder for granulation and pelletizing to obtain the finished product. The temperatures of the six temperature zones from the feed end to the discharge end of the twin-screw extruder are 260℃, 270℃, 270℃, 275℃, 275℃, and 280℃, respectively, and the spindle speed of the twin-screw extruder is 30 r / min. The surface resistivity was tested to reach 10. 10 Orders of magnitude, flame retardant rating V-0, impact strength 49kJ / m 2 Tensile yield stress 57 mPa, elongation at break 88%, flexural modulus 2270 MPa.

[0026] Example 9

[0027] A method for preparing antistatic and flame-retardant PC granules, comprising, by weight, 100 parts PC granules and 20 parts of the antistatic and flame-retardant additive from Example 3. The above components are added to a twin-screw extruder for granulation and pelletizing to obtain the finished product. The temperatures of the six temperature zones from the feed end to the discharge end of the twin-screw extruder are 260℃, 270℃, 270℃, 275℃, 275℃, and 280℃, respectively, and the spindle speed of the twin-screw extruder is 30 r / min. The surface resistivity was tested to reach 10. 10 Orders of magnitude, flame retardant rating V-0, impact strength 47 kJ / m 2 Tensile yield stress 55 MPa, elongation at break 82%, flexural modulus 2230 MPa.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An antistatic flame retardant additive, characterized in that, The product comprises, by weight, 100 parts flame retardant, 10-50 parts antistatic agent, and 10-15 parts wetting and dispersing agent; the raw materials are ball-milled in a sand mill to obtain the finished product; the flame retardant is RDP or BDP, the antistatic agent is one or a mixture of several of graphite, conductive carbon black, graphene, carbon nanotubes, nano-ATO, and nano-ITO, and the wetting and dispersing agent is one or a mixture of several of hydroxyl functional carboxylic acid ester dispersants containing pigment affinity groups, modified polyurethane dispersants, phosphate ester / polyphosphate ester dispersants, and alkyl hydroxyammonium salt dispersants containing acidic group copolymers.

2. The antistatic and flame-retardant additive according to claim 1, characterized in that, The wetting and dispersing agent is one or a mixture of several of BYK-101, BYK-103, BYK-P104, BYK-P104S, BYK-107, BYK-108, BYK-110, BYK-111, BYK-161, BYK-163, BYK-164, BYK-166, BYK-170, BYK-180, BYK-182, and BYK-2200.

3. The antistatic and flame-retardant additive according to claim 1, characterized in that, The mill is a zirconia ball mill, and the diameter of the zirconia balls is 0.1-0.3 mm.

4. The antistatic and flame-retardant additive according to claim 3, characterized in that, The ball milling speed is 2800 rpm, the ball milling temperature is 25℃, and the ball milling is carried out until the particle size is less than 100 nm.

5. A method for preparing antistatic and flame-retardant PC particles based on the antistatic and flame-retardant additive according to any one of claims 1 to 4, characterized in that, The product comprises the following components by weight: 100 parts PC granules and 12-20 parts antistatic and flame-retardant additives; the components are added to a twin-screw extruder for granulation and pelletizing to obtain the finished product.

6. The method for preparing antistatic and flame-retardant PC particles according to claim 5, characterized in that, The temperatures of the six temperature zones from the feed end to the discharge end of the twin-screw extruder are 260℃, 270℃, 270℃, 275℃, 275℃, and 280℃, respectively, and the spindle speed of the twin-screw extruder is 30 r / min.

Images