CN-117164985-B - Color-adjustable flame-retardant antistatic polypropylene composition and preparation method thereof

CN117164985BCN 117164985 BCN117164985 BCN 117164985BCN-117164985-B

Abstract

The invention provides a color-adjustable flame-retardant antistatic polypropylene composition, a preparation method thereof and a product prepared from the composition. The composition comprises the following components (1) 56-64 parts by weight of high-melt-index polypropylene, (2) 14-16 parts by weight of ultra-high-melt-index polypropylene, (3) 0.2-1.0 part by weight of carbon nano tubes, (4) 8-20 parts by weight of flame retardant, (5) 0.5-1 part by weight of surface modifier, (6) 0.5-1.5 parts by weight of compatibilizer, (7) optional pigment, and (8) optional other auxiliary agents. The color-adjustable flame-retardant antistatic polypropylene composition has excellent processing, flame-retardant and antistatic properties, can be adjusted to be color, is easy to identify, and can be applied to various fields of production and life.

Inventors

LIU GUOGANG
ZHANG ZHICHENG
ZHANG YINLING
YU FANG
HAN ZHIHUA
WU FUMEI
LIANG WENBIN

Assignees

国家能源投资集团有限责任公司
北京低碳清洁能源研究院

Dates

Publication Date: 20260505
Application Date: 20220525

Claims (19)

1. A color-tunable flame retardant antistatic polypropylene composition comprising the following components: (1) 56-64 parts by weight of high-melt polypropylene, wherein the melt flow rate of the high-melt polypropylene is 50-500 g/10min under the conditions of 230 ℃ and 2.16kg load according to ISO 1133; (2) 14-16 parts by weight of ultra-high melt polypropylene, wherein the melt flow rate of the ultra-high melt polypropylene is greater than 500g/10min under the conditions of 230 ℃ and 2.16kg load according to ISO 1133; (3) 0.2-1.0 part by weight of carbon nano tube, wherein the carbon nano tube is single-walled carbon nano tube, the average diameter of the carbon nano tube is 1.0-3.0 nm, the length of the carbon nano tube is 5-50 mu m, the specific surface area is 500-2000m 2 /G, and the G/D ratio is 10-50; (4) 8-20 parts of flame retardant; (5) 0.5-1 parts by weight of a surface modifier; (6) 0.5-1.5 parts by weight of compatibilizer; (7) 4-10 parts by weight of optional pigment, and (8) Optionally other auxiliary agents: 0.3-2 parts by weight.
2. The color tunable flame retardant antistatic polypropylene composition according to claim 1, wherein, The high melt index polypropylene has a melt flow rate of 80-150 g/10min measured according to ISO 1133 under the conditions of a temperature of 230 ℃ and a load of 2.16kg, and/or The ultra-high melt polypropylene has a melt flow rate of greater than 1000g/10min, measured according to ISO 1133, at a temperature of 230 ℃ and a load of 2.16kg, and/or The dosage of the carbon nano tube is 0.3-0.5 part and/or The content of the pigment is 4.5-6 parts by weight.
3. The color tunable flame retardant antistatic polypropylene composition according to claim 1, wherein, The high melt index polypropylene is one or more selected from homo-polypropylene and co-polypropylene, and has a number average molecular weight Mn of 10000-50000, a molecular weight distribution PD of 1.5-4, and/or The ultra-high melt polypropylene is one or more selected from homo-polypropylene and co-polypropylene, the number average molecular weight Mn of the ultra-high melt polypropylene is 30000-100000, and the molecular weight distribution PD is 2-4.
4. The color tunable flame retardant antistatic polypropylene composition according to claim 3, wherein, The high melt index polypropylene has a number average molecular weight Mn of 10000-30000, and/or The molecular weight distribution PD of the high melt index polypropylene is 2-3, and/or The ultra-high melt index polypropylene has a number average molecular weight Mn of 40000-60000, and/or The molecular weight distribution PD of the ultra-high melt index polypropylene is 2.0-3.5, and/or The weight ratio of the high melt index polypropylene to the ultrahigh melt index polypropylene is 3-7:1.
5. The color tunable flame retardant antistatic polypropylene composition according to any one of claims 1 to 4 wherein, The pigment is one or more selected from titanium pigment, phthalocyanine blue, phthalocyanine green, bright beautiful yellow and solid-beautiful transparent red powder, and/or The weight ratio of the high melt index polypropylene to the ultra-high melt index polypropylene is 4:1.
6. The color-tunable flame retardant antistatic polypropylene composition according to any one of claims 1 to 3 wherein, The flame retardant comprises: 6-16 parts by weight of a main flame retardant, and 3-6 Parts by weight of a flame retardant synergist, Wherein the main flame retardant is a halogen flame retardant; the flame retardant synergist is one or more selected from antimony trioxide, zinc borate and nitrogen flame retardants.
7. The color tunable flame retardant antistatic polypropylene composition according to claim 6, wherein, The content of the main flame retardant is 8-14 parts by weight and/or The content of the flame retardant synergist is 3-5 parts by weight and/or The main flame retardant is one or more selected from aromatic brominated compounds, cycloaliphatic brominated compounds and aliphatic brominated compounds.
8. The color tunable flame retardant antistatic polypropylene composition according to claim 6, wherein, The main flame retardant is decabromodiphenyl ethane and/or decabromodiphenyl ether, and/or The flame retardant synergist is antimony trioxide.
9. The color-tunable flame retardant antistatic polypropylene composition according to any one of claims 1 to 3 wherein, The surface modifier is one or more selected from titanate coupling agent and silane coupling agent, and/or The compatibilizer is selected from polar monomer grafted polymers.
10. The color tunable flame retardant antistatic polypropylene composition according to claim 9, wherein, The surface modifier is a silane coupling agent, and/or The polar monomer is selected from one or more of anhydride, carboxylic acid derivative, amino compound, hydroxyl compound, epoxy compound and ionic compound.
11. The color tunable flame retardant antistatic polypropylene composition according to claim 9, wherein, The compatibilizer is maleic anhydride grafted polypropylene or glycidyl methacrylate grafted polypropylene.
12. The color tunable flame retardant antistatic polypropylene composition according to claim 11, wherein, The melt flow rate of the maleic anhydride grafted polypropylene is 50-400 g/10min measured according to ISO 1133 under the condition of 230 ℃ and 2.16kg load, and/or The grafting rate of the maleic anhydride grafted polypropylene is 1-2%.
13. The color tunable flame retardant antistatic polypropylene composition according to claim 11, wherein, The melt flow rate of the maleic anhydride grafted polypropylene is 100-200 g/10min measured according to ISO 1133 under the condition of 230 ℃ and 2.16kg load, and/or The grafting rate of the maleic anhydride grafted polypropylene is 1.2-1.5%.
14. The color-tunable flame retardant antistatic polypropylene composition according to any one of claims 1 to 3 wherein, The other auxiliary agent is one or more selected from antioxidants, lubricants, anti-photoaging agents, heat stabilizers, hyperdispersants and nucleating agents.
15. The color-tunable flame retardant antistatic polypropylene composition according to any one of claims 1 to 3 wherein, The color-adjustable flame-retardant antistatic polypropylene composition has a melt flow rate of 80-150 g/10min measured according to ISO 1133 under the conditions of a temperature of 230 ℃ and a load of 2.16kg, and/or The color-adjustable flame-retardant antistatic polypropylene composition has the surface resistance of less than 3X 10 8 Ω measured according to the Chinese coal mine industry standard MT 113-1995, and/or According to the color-adjustable flame-retardant antistatic polypropylene composition, the flame retardant property measured according to the Chinese coal mine industry standard MT 113-1995 is that after an alcohol burner is removed, the average value of flame burning arithmetic of a test piece is not more than 3s, the average value of flameless burning arithmetic of the test piece is not more than 10s, and the flame propagation length is not more than 280mm.
16. A process for preparing the color tunable flame retardant antistatic polypropylene composition of any one of claims 1 to 15 comprising the steps of: (1) Sequentially adding the ultra-high melt polypropylene, the carbon nano tube, the surfactant, the solubilizer, the optional pigment and the optional other auxiliary agents into a mixer, and fully mixing to prepare a granulating auxiliary agent packet; (2) Adding the flame retardant into a mixer for fully mixing; (3) And (3) conveying the high-melt-index polypropylene to a main-feed weightlessness scale, conveying the granulated auxiliary agent package obtained in the step (1) and the flame retardant obtained in the step (2) to a side-feed weightlessness scale through a vacuum material absorbing device, and respectively adding materials through an extruder main feed and a forced side feed to prepare the flame-retardant antistatic polypropylene composition with adjustable colors.
17. The method for preparing a color tunable flame retardant antistatic polypropylene composition according to claim 16, wherein, In the step (1), the mixing temperature of the mixer is 40-80 ℃, the mixing time is 3-5 minutes, and finally the granulating auxiliary agent packet is prepared after granulating by an extruder, the extruding temperature is 180-220 ℃, the rotating speed of the extruder is 300rpm, and/or In the step (2), the rotating speed of the mixer is 100rpm, the mixing time is 3-5 minutes, and/or In the step (3), the extrusion temperature is 190-230 ℃, the rotating speed of the extruder is 200rpm, and the granules are cut into 2-5 mm granules by a granulator after cooling.
18. An article made from the color tunable flame retardant antistatic polypropylene composition of any one of claims 1 to 15.
19. The article of claim 18, wherein the article is a mining panel or profile.

Description

Color-adjustable flame-retardant antistatic polypropylene composition and preparation method thereof Technical Field The invention belongs to the field of flame-retardant antistatic materials, and particularly relates to a flame-retardant antistatic polypropylene composition with adjustable high flowing color and a preparation method thereof. Background Polypropylene is a widely used polymer material, has the advantages of low cost, light weight, chemical resistance, corrosion resistance and the like, is often produced into pipes, plates, films and the like, and is widely applied to the fields of agriculture, construction, electronic and electric appliances, packaging and the like. However, the limiting oxygen index of polypropylene is only 18, and the polypropylene belongs to inflammable materials, and the high insulativity of polypropylene ensures that the surface resistivity of the polypropylene is as high as 10 16 omega, so that static electricity accumulation is easy to occur on the surface, thereby possibly preventing production, damaging electronic equipment, generating accidents such as explosion caused by electric sparks, and greatly limiting the application of the polypropylene in various fields such as coal mines, electronic appliances, chemical production, product transportation and the like. The improvement of the flame retardant and antistatic properties of polypropylene by adding flame retardant, antistatic agent and the like after blending becomes a research hot spot. Research shows that a large amount of flame retardant and antistatic agent are often required to ensure the flame retardant and antistatic performance of a formula system, and the common antistatic agents include hydrophilic high molecular polymers, metal fibers, carbon black, graphene and the like, and the antistatic agents generally need higher addition amount to generate excellent conductive performance. For example, chinese patent application CN201911274784.6 discloses a permanent color antistatic flame-retardant polyolefin steel wire composite pipe, its preparation method and mold, chinese patent application CN201410638892.8 discloses an antistatic antibacterial color master and its preparation method, and chinese patent application CN201010100077.8 discloses an antistatic polyethylene and its preparation method. By selecting the hydrophilic polymers represented by permanent high-molecular antistatic agents such as polyoxyethylene-polyamide composition, octadecylamine polyoxyethylene ether, dodecylamine polyoxyethylene ether, ethylene-acrylic acid copolymer and the like, although the requirements of application scenes of low-requirement antistatic can be met, the addition amount is still high, and the mechanical properties of the product are obviously reduced due to poor compatibility with polypropylene, especially indexes such as elongation at break, impact strength and the like, so that the service performance and safety of the product are affected. For example, chinese patent application CN201110405869.0 discloses a V-0 flame-retardant antistatic polypropylene material and a preparation method thereof, chinese patent application CN201410325494.0 discloses a preparation method of conductive polypropylene, chinese patent application CN201710286138.6 discloses a high-strength high-rigidity graphene modified polypropylene and a preparation method thereof, and flame retardant, antistatic filler and the like are added to improve flame retardant and antistatic effects of the polypropylene material. In order to form a conductive percolation network and meet the antistatic requirement of application scenes, a large amount of antistatic agent carbon black, graphene and the like are often required to be added. The addition of the conductive filler forms a physical cross-linked network, so that the viscosity of the resin is greatly improved, the processing fluidity of the resin is affected, and the design and use requirements of complex parts, large-sized parts and thin-wall parts are hardly fully met. Meanwhile, the addition of excessive black conductive media such as carbon black, graphene and the like makes the prepared product only have black appearance. Carbon nanotubes ask oneself have been the focus of attention because of their own unique small size effects, surface area effects, and the like. The method is applied to various fields such as quantum wires, composite materials, hydrogen storage functional materials, lithium ion batteries and the like. And (3) preparing a 3D conductive network by utilizing the extremely large length-diameter ratio of the carbon nano tube, wherein the 3D conductive network penetrates through the whole polymer substrate. However, the dispersibility of the carbon nanotubes and the PP substrate is poor, and the carbon nanotubes and the PP substrate are easy to agglomerate. Color-tunable flame retardant antistatic polypropylene compositions have not been reported in the prior art. Disclosure of Inv