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A kind of composite modified melamine cyanurate flame retardant and its preparation method and application

A technology of melamine cyanurate and compound modification, applied in the field of flame retardants, can solve the problems of failing to reach GWIT, no substantial improvement in flame retardant efficiency, etc. Effect of Glow Wire Temperature

Active Publication Date: 2019-06-21
湖南美莱珀科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patent ZL03135668.0 describes the preparation of a modified melamine cyanurate flame retardant by using triethanolamine, dicyandiamide, pentaerythritol, etc. as compounding agents, phosphoric acid, triphenyl phosphate, etc. The focus of the patent is to improve the synthesis process of melamine cyanurate flame retardant, reduce the amount of water used in the reaction system, and improve the dispersion compatibility of melamine cyanurate and polymers, but there is no substantial improvement in flame retardant efficiency
Chinese patent application number 2014107678896 discloses the preparation of a modified melamine cyanurate flame retardant by using thiocyanic acid as a modifier. The invention emphasizes the simultaneous reaction of thiocyanic acid and cyanuric acid with melamine A modified melamine cyanurate flame retardant with a new structure, and the synergistic flame retardancy of sulfur and triazine rings, but the flame retardant of the present invention only improves the limiting oxygen index and vertical combustion flame retardancy of flame retardant nylon grade
In addition, according to Document 1 (Synthesis of melamine-based flame retardant and its application research on flame-retardant nylon 6, author: Wang Ningping, Donghua University (Master's Thesis), January 2016) reported thiocyanate modified melamine cyanide The glow wire ignition temperature of urate flame retardant flame retardant nylon 6 can reach 750°C according to the GB1040.3-2006 standard test GWIT, but it cannot reach GWIT 850°C and above

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  • A kind of composite modified melamine cyanurate flame retardant and its preparation method and application

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Effect test

Embodiment 1

[0027] A preparation method of composite modified melamine cyanurate flame retardant, comprising the following steps

[0028] 1) After adding melamine, cyanuric acid, compounding agent and thermal stabilizer into water to stir and disperse, then heating and reacting to obtain a viscous paste of modified melamine cyanurate; the amount of water added is melamine, cyanuric acid, 1 times the total mass of compounding agent and thermal stabilizer, the molar ratio of melamine to cyanuric acid is 1:0.9; the reaction temperature of heating reaction is 40°C, and the reaction time is 0.5h; the compounding agent in this embodiment is 2-mercapto Thiazoline.

[0029] 2) After the viscous paste of the prepared modified melamine cyanurate is settled and gravity filtered, dried and pulverized, a composite modified melamine cyanurate flame retardant is obtained.

[0030] The composite modified melamine cyanurate flame retardant prepared according to the above-mentioned method is made up of me...

Embodiment 2

[0032] A preparation method of composite modified melamine cyanurate flame retardant, comprising the following steps

[0033] 1) After adding melamine, cyanuric acid, compounding agent and thermal stabilizer into water to stir and disperse, then heating and reacting to obtain a viscous paste of modified melamine cyanurate; the amount of water added is melamine, cyanuric acid, 15 times the total mass of the compounding agent and heat stabilizer, the molar ratio of melamine to cyanuric acid is 1:1.1; the reaction temperature of the heating reaction is 130°C, and the reaction time is 6h; the compounding agent in this example is 2-mercaptobenzene Base thiazole, heat stabilizer is magnesium oxide.

[0034] 2) After the prepared viscous paste of modified melamine cyanurate is filtered under pressure, dried and pulverized, a composite modified melamine cyanurate flame retardant is obtained.

[0035] The composite modified melamine cyanurate flame retardant prepared according to the ab...

Embodiment 3

[0037] A preparation method of composite modified melamine cyanurate flame retardant, comprising the following steps

[0038] 1) After adding melamine, cyanuric acid, compounding agent and thermal stabilizer into water to stir and disperse, then heating and reacting to obtain a viscous paste of modified melamine cyanurate; the amount of water added is melamine, cyanuric acid, 5 times the total mass of the compounding agent and heat stabilizer, the molar ratio of melamine to cyanuric acid is 1:1; the reaction temperature of the heating reaction is 80°C, and the reaction time is 2h; the compounding agent in this example is 2-mercaptobenzene And thiazole zinc salt, heat stabilizer is magnesium hydroxide.

[0039] 2) Vacuum filtering, drying and pulverizing the viscous paste of the prepared modified melamine cyanurate to obtain a composite modified melamine cyanurate flame retardant.

[0040] The composite modified melamine cyanurate flame retardant prepared according to the abov...

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Abstract

The invention relates to a composite modified melamine cyanurate fire retardant and a preparation method and application of the fire retardant, and belongs to the field of preparation of fire-retardant polymer materials. The method comprises the steps that cyanurotriamide, cyanuric acid, a composite agent and a heat stabilizer are added to water for stirring and dispersing and then heated for reacting, and thick paste of modified melamine cyanurate is prepared; then the prepared thick paste of the modified melamine cyanurate is filtered, dried and smashed to obtain the composite modified melamine cyanurate fire retardant. A compound containing thiazole groups serves as the composite agent for modification, compared with traditional melamine cyanurate, the prepared melamine cyanurate is good in heat stability, when the fire retardant is added into a high polymer material, the glow-wire temperature resistance of the fire-retardant polymer material can be effectively improved, the smoke density from the burning of the fire-retardant material is reduced, and the composite modified melamine cyanurate fire retardant is widely used in fire retardant aspects of the high polymer materials, such as polyolefin, polyester and nylon.

Description

technical field [0001] The invention belongs to the field of flame retardants, in particular to a composite modified melamine cyanurate flame retardant and its preparation method and application. Background technique [0002] Melamine and its derivatives are important flame retardants for the development and application of environmentally friendly halogen-free flame retardants. Among them, the melamine salt flame retardant with the largest amount and fastest growth is melamine cyanurate (MCA), melamine cyanurate It is a large planar molecular complex with a layered structure formed by the reaction of melamine (MEL) and cyanuric acid (CA). It is a class of fine chemical products developed in the 1980s and put into industrial production in large quantities. MCA has the advantages of high efficiency, halogen-free, non-toxic, low smoke, etc., and can be used as a flame retardant for various polymers, especially polyamide polymer materials. Compared with inorganic flame retardan...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K9/04C08K5/3492C08K3/22C08L77/02C08L23/12C08L67/02
CPCC08K3/22C08K3/2279C08K5/34928C08K9/04C08K2003/2206C08K2003/222C08K2003/2224C08K2003/2227C08K2003/2231C08L2201/02C08L2201/08C08L77/02C08L23/12C08L67/02
Inventor 彭治汉童丽亚
Owner 湖南美莱珀科技发展有限公司