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High-fluidity anti-separation-out halogen-free flame retardant and preparation method and application thereof

A high fluidity, flame retardant technology, used in the field of flame retardant compositions, can solve problems such as reducing production efficiency, affecting appearance, affecting resin dispersion, etc., to solve the problem of poor dispersion and compatibility, and improve product appearance. , the effect of reducing the difficulty of selection

Active Publication Date: 2019-11-22
SHANGHAI RES INST OF CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the piperazine phosphate system also faces some problems in application: (1) The pulverized powder has a large charge effect, is easy to agglomerate, and has poor dispersion in the resin, especially in black products, white spots are easy to exist, Affect the appearance; (2) The fluidity of the powder is poor, and bridges and broken bars are prone to exist during the extrusion process, which affects the processing performance and reduces production efficiency; (3) Although the water solubility is low, the powder is stacked for a long time It will absorb moisture and agglomerate, it will not be easily broken during compounding process, and the particles with larger particle size will remain, which will affect the dispersion in the resin
However, the research on the surface treatment and microcapsule coating of the flame retardant powder, especially the piperazine pyrophosphate compound system, through the mixed use of lubricants and silicone oils can improve the problems of agglomeration, caking and processing of the piperazine pyrophosphate system , improving its water resistance and moisture absorption migration in flame-retardant polypropylene materials has not yet been publicly reported

Method used

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  • High-fluidity anti-separation-out halogen-free flame retardant and preparation method and application thereof
  • High-fluidity anti-separation-out halogen-free flame retardant and preparation method and application thereof
  • High-fluidity anti-separation-out halogen-free flame retardant and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0054] The preparation process of the above-mentioned high fluidity precipitation-resistant halogen-free flame retardant is as follows:

[0055] (1) Preparation of the powder body of the halogen-free flame retardant:

[0056] Put piperazine phosphate, melamine and its derivatives and inorganic metal zinc compound into a 300L high-speed mixer with a preheating temperature of 80-120°C according to the formula, mix at a low speed of 250-600rpm for 5-30min, remove the moisture in the material, and then Turn to high speed 800~1200rpm and mix to obtain the powder body of the halogen-free flame retardant;

[0057] (2) Preparation of surface treatment agent:

[0058] Dispersing lubricants into silicone oils to obtain the surface treatment agent;

[0059] (3) Preparation of halogen-free flame retardant:

[0060] Add the prepared surface treatment agent into the high-speed mixer equipped with the powder body of the halogen-free flame retardant by spraying or dropping, at a temperatur...

Embodiment 1

[0078] A high-fluidity, precipitation-resistant, halogen-free flame retardant. Its raw material formula is shown in Table 1. The preparation process is to put piperazine phosphate, melamine and its derivatives, and metal zinc compounds in proportion to the preheating temperature. In a 300L high-speed mixer at 120°C, mix at a low speed of 475rpm for 10 minutes to remove the moisture in the material (the water content is reduced to less than 0.1%), then turn to a high speed of 1000rpm and mix the silicone oil dispersed with a lubricant through a spray device. Spray into the kettle, mix at high speed for 15 minutes, then cool, and discharge to obtain a well-mixed and surface-treated compound flame-retardant system. The obtained powder and material test results are shown in Table 1; the silicone oil used in this example has a viscosity of 50mPa. s.

Embodiment 2

[0080] The implementation process is the same as that of Example 1, except that the preheating temperature of the 300L kettle is 150° C., and the high-speed mixing time is 5 minutes during the surface treatment process except for compounding the flame retardant. See Table 1 for other materials and their proportions, and see Table 1 for the test results of the obtained powder and materials. The silicone oil used in this example has a viscosity of 60 mPa·s.

[0081] The hydrophobicity of the surface treatment flame retardant obtained in this embodiment is tested, and the contact angle photo of the halogen-free flame retardant is obtained, as figure 1 As shown, it is found that distilled water is distributed in the form of water droplets on the surface of the flame retardant powder, and the contact angle is 160°, which shows that the hydrophobicity of the powder is good.

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Abstract

The invention relates to a high-fluidity anti-separation-out halogen-free flame retardant, which comprises the following raw materials by weight: 45-70% of piperazine phosphate, 20-50% of melamine andderivatives thereof, 5-10% of an inorganic metal zinc compound and 0.1%-1.5% of a surface treating agent; wherein the surface treating agent comprises a lubricating agent and a silicone oil substance, and the mass ratio of the lubricating agent to the silicone oil substance is 0.5-1.2; and the silicone oil substance forms a capsule wall outside the powder body of the halogen-free flame retardant.Compared with the prior art, the invention has the advantages of great hydrophobicity, flowability, flame retardancy and the like, and solves the problems of agglomeration, caking and bridging in theprocessing process of the flame retardant powder.

Description

technical field [0001] The invention relates to a flame retardant composition for synthetic resins, in particular to a high fluidity precipitation-resistant halogen-free flame retardant and its preparation method and application. Background technique [0002] Polypropylene (PP) is a thermoplastic resin with excellent properties. It has chemical resistance, electrical insulation, high-strength mechanical properties and high wear-resistant processing properties. It is widely used in electronic appliances, automobiles, machinery and other fields. However, the oxygen index of polypropylene material is only 18%, which is easy to burn and cause fire. Especially as the home appliance and automobile industries have more and more stringent requirements for flame retardancy and fire protection, the development of new high-efficiency, low-smoke, halogen-free, and excellent performance polypropylene Propylene flame retardants and products have good market prospects. [0003] At present...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08L23/14C08K13/06C08K9/10C08K5/3462C08K5/3492
CPCC08L23/12C08L23/14C08K13/06C08K9/10C08K5/3462C08K5/34928C08L2205/03C08L2205/025C08L2201/02C08L2201/22C08K2003/321
Inventor 许肖丽林倬仕叶文董玲玲许保云肖雄胡爽陈涛周忠伟
Owner SHANGHAI RES INST OF CHEM IND
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