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A kind of halogen-free flame retardant with high fluidity and resistance to precipitation and its preparation method and application

A high fluidity, flame retardant technology, applied in the field of flame retardant composition, can solve problems affecting processing performance, large charge of powder, bridging and broken bars, etc., achieve excellent flame retardant performance and simple preparation process , the effect of improving liquidity

Active Publication Date: 2022-07-19
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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  • A kind of halogen-free flame retardant with high fluidity and resistance to precipitation and its preparation method and application
  • A kind of halogen-free flame retardant with high fluidity and resistance to precipitation and its preparation method and application
  • A kind of halogen-free flame retardant with high fluidity and resistance to precipitation and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0054] The preparation process of the above-mentioned high fluidity and resistance to precipitation halogen-free flame retardant is:

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

[0056] Put piperazine phosphate, melamine and derivatives and inorganic metal zinc compounds 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] The surface treatment agent is obtained by dispersing the lubricant into the silicone oil substance;

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

[0060] The prepared surface treatment agent is added to the high-speed mixer equipped with the powder body of the halogen-free flame retardant by spraying or dripping, the t...

Embodiment 1

[0078] A halogen-free flame retardant with high fluidity and resistance to precipitation. In a 300L high-speed mixer at 120°C, mix at a low speed of 475 rpm for 10 minutes to remove the moisture in the material (the water content is reduced to less than 0.1%), and then turn to a high speed of 1000 rpm for mixing, and the silicone oil dispersed with the lubricant is uniformly passed through the spray device. Sprayed into the kettle, mixed at high speed for 15min, then cooled and discharged to obtain a well-mixed composite flame retardant system with surface treatment. The obtained powder and material test results are shown in Table 1; the viscosity of the silicone oil used in this example is 50mPa. s.

Embodiment 2

[0080] The implementation process is the same as in 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 the compound flame retardant. Other materials and proportions are shown in Table 1, and the obtained powder and material test results are shown in Table 1. The viscosity of the silicone oil used in this example is 60 mPa·s.

[0081] The hydrophobicity of the surface-treated flame retardant obtained in this example is tested, and the contact angle photo of the halogen-free flame retardant is obtained, such as figure 1 As shown in the figure, it was found that distilled water was distributed in the form of beads on the surface of the flame retardant powder, and the contact angle was 160°, indicating that the powder had better hydrophobicity.

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Abstract

The invention relates to a halogen-free flame retardant with high flowability and resistance to precipitation. 5 to 10%; surface treatment agent 0.1 to 1.5%; wherein, the surface treatment agent includes lubricant and silicone oil, and the mass ratio of the lubricant to the silicone oil is 0.5 to 1.2; the silicone oil is in The outside of the powder body of the halogen-free flame retardant forms the capsule wall. Compared with the prior art, the invention has the advantages of good hydrophobicity, good fluidity, good flame retardancy and the like, and solves the problems of agglomeration, agglomeration and bridging of the flame retardant powder during processing.

Description

technical field [0001] The invention relates to a flame retardant composition for synthetic resins, in particular to a halogen-free flame retardant with high fluidity and resistance to precipitation, and a preparation method and application thereof. 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 resistance. 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 with the increasingly strict requirements for flame retardant and fire protection grades in the home appliance and automobile industries, the development of new high-efficiency, low-smoke, halogen-free and excellent performance poly Propylene flame retardants and products have good market prospects. [0003] At present, the...

Claims

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Application Information

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Patent Type & Authority Patents(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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