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High-fluidity antibacterial halogen-free flame retardant composite material and preparation method thereof

A technology of composite materials and flame retardants, applied in the field of modified polypropylene materials and its preparation, can solve the problems of low flame retardant efficiency, large amount of addition, low density, etc., to improve flame retardant performance, save costs, and optimize formula Effect

Pending Publication Date: 2019-05-31
WANHUA CHEMICAL (NINGBO) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] For flame-retardant materials, the flame retardants involved are mainly bromine, phosphorus, phosphorus-nitrogen, and inorganic magnesium hydroxide and aluminum hydroxide. Among them, phosphorus-nitrogen flame retardants are smokeless, non-toxic, and dense The advantages of low cost and environmental protection are widely used in the field of flame-retardant PP. Phosphorus-nitrogen flame retardants can protect the substrate by forming an expanded carbon layer during combustion. At present, the most commonly used systems are ammonium polyphosphate and pentaerythritol systems, but this The system also has disadvantages such as large amount of addition and low flame retardant efficiency. In order to improve its flame retardant efficiency and reduce its impact on the mechanical properties of the matrix resin, it needs to develop its ability to synergistically flame retardant with other material components

Method used

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  • High-fluidity antibacterial halogen-free flame retardant composite material and preparation method thereof
  • High-fluidity antibacterial halogen-free flame retardant composite material and preparation method thereof
  • High-fluidity antibacterial halogen-free flame retardant composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] (1) Preparation process of modified hydrotalcite M-1

[0060] Weigh 10 g of hydrotalcite precursor Mg-Al-LDHs (CO 3 2- ) and 20g of AgNO 3 , the mass ratio between the two is 1:2, the two are mixed evenly, and then placed in a muffle furnace for calcination at 450°C for 2h, to prepare a double metal oxide loaded with silver ions.

[0061] b. Weigh 10 g of the double metal oxide loaded with silver ions in step a, then grind it to a size larger than 300 mesh, add 500 ml of distilled water and stir evenly to prepare a hydrotalcite suspension slurry.

[0062] c. According to the weight ratio of 1:1.2, weigh the amount of ammonium octamolybdate to be 12g, then add 300ml of distilled water to make a soluble salt solution, and then slowly add it to the hydrotalcite suspension in step b through a constant pressure dropping funnel , nitrogen protection, stirring at 80°C for 6h.

[0063] d. After the stirring is completed, crystallize at 90°C for 12 hours, then filter, wash, ...

Embodiment 2

[0068] (1) Preparation process of modified hydrotalcite M-2

[0069] a. Weigh 15g of the hydrotalcite precursor Mg-Al-LDHs (CO 3 2- ) and 15g of AgNO 3 , The weight ratio between the two is 1:1, the two are mixed evenly, and then put into a muffle furnace for calcination at 500°C for 2h, to prepare a double metal oxide loaded with silver ions.

[0070] b. Weigh 10 g of the double metal oxide loaded with silver ions in step a, then grind to a size larger than 300 mesh, add 500 ml of distilled water and stir evenly to prepare a hydrotalcite suspension slurry.

[0071] c. According to the weight ratio of 2:1, weigh the amount of ammonium octamolybdate to be 5g, then add 300ml of distilled water to make a soluble molybdate solution, and then slowly add the hydrotalcite suspension in step b through the constant pressure dropping funnel solution, under nitrogen protection, and stirred at 80°C for 6h.

[0072] d. After the stirring is completed, crystallize at 90°C for 12 hours, ...

Embodiment 3

[0077] (1) Preparation process of modified hydrotalcite M-3

[0078] a. Weigh 10g of hydrotalcite precursor Mg-Al-LDHs (CO 3 2- ) and 15g of AgNO 3 , the weight ratio between the two is 1:1.5, the two are mixed uniformly, and then put into a muffle furnace for calcination at 550° C. for 2 hours to prepare a double metal oxide loaded with silver ions.

[0079] b. Weigh 10 g of the double metal oxide loaded with silver ions in step a, then grind to a size larger than 300 mesh, add 500 ml of distilled water and stir evenly to prepare a hydrotalcite suspension slurry.

[0080] c. According to the weight ratio of 1:2, weigh the amount of ammonium octamolybdate to be 20g, then add 300ml of distilled water to make a soluble molybdate solution, and then slowly add it to the hydrotalcite suspension in step b through a constant pressure dropping funnel solution, under nitrogen protection, and stirred at 80°C for 6h.

[0081] d. After the stirring is completed, crystallize at 90°C fo...

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PUM

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Abstract

The invention discloses a high-fluidity antibacterial halogen-free flame retardant composite material. The composite material comprises polypropylene, halogen-free flame retardants, modified hydrotalcite, antioxidants, lubricating agents, anti-dripping agents, titanium dioxide and antibacterial agents. The composite material has a higher melt flow index, a hydrotalcite precursor and silver nitrateare mixed and calcined, molybdate is added into mixture to prepare the modified hydrotalcite, the modified hydrotalcite is added, so that multiple performances are provided, flame-retardant efficiency can be improved, flame-retardant level reaches UL94 1.6 V-0, and high antibacterial action can be achieved under less antibacterial agents. Molybdic acid ions are introduced between hydrotalcite layers, so that the composite material has a smoke suppression function.

Description

technical field [0001] The invention relates to a modified polypropylene material and a preparation method thereof, in particular to a high-flow antibacterial halogen-free flame-retardant composite material and a preparation method thereof. Background technique [0002] As one of the five general-purpose plastics, polypropylene is widely used in household appliances, automobiles and building materials because of its excellent mechanical properties, good heat resistance, high chemical stability, excellent electrical insulation, and good processability. Polypropylene has a low oxygen index and is extremely flammable, which greatly limits its application. Therefore, if it wants to expand its application range, it must be modified by flame retardancy. [0003] Layered double hydroxides (LDHs for short), also known as hydrotalcites, are a new type of layered functional materials. Due to the unique structural composition of LDHs, LDHs have unique acid-base bifunctionality, interl...

Claims

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Application Information

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IPC IPC(8): C08L23/12C08L23/14C08L27/18C08K9/00C08K9/02C08K7/00C08K3/22C08K5/098C08K5/134C08K5/526
Inventor 涂永鑫顾永江费晨洪陈海波
Owner WANHUA CHEMICAL (NINGBO) CO LTD
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