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A kind of high heat-resistant microcapsule flame retardant and preparation method thereof

A flame retardant and microcapsule technology, which is applied in the field of high heat-resistant microcapsule flame retardant and its preparation, can solve the adverse effects of physical and mechanical properties of materials, lack of core material synergistic flame retardant effect, and insignificant improvement of matrix compatibility To achieve the effects of convenient and controllable process, improved mechanical properties, and high limiting oxygen index

Active Publication Date: 2017-11-28
GUANGZHOU WANBAO ELECTRONICS MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, during the process of processing, the thermosetting capsule material is easy to be squeezed and partially broken, which affects the coating effect. In addition, due to the dispersion and compatibility problems of the additive flame retardants during the addition process, these microcapsule flame retardants, although The dispersibility is improved, but the compatibility with some substrates is not significantly improved, which has a negative impact on the physical and mechanical properties of the material. At the same time, the function of the capsule material is single, and it cannot achieve a certain synergistic flame retardant effect with the core material. Poor heat resistance, not suitable for use in higher processing temperature polymers

Method used

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  • A kind of high heat-resistant microcapsule flame retardant and preparation method thereof
  • A kind of high heat-resistant microcapsule flame retardant and preparation method thereof
  • A kind of high heat-resistant microcapsule flame retardant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] (1) Add 10 g of aluminum hydroxide to a three-necked flask, add 200 ml of ethanol solvent, and add 10 ml of dispersing

[0041] Sodium dodecylsulfonate, mechanically stirred for 0.5 h to 1 h to prepare aluminum hydroxide dispersion;

[0042] (2) Add hexachlorocyclotriphosphazene to the aluminum hydroxide dispersion obtained in step (1) under mechanical stirring, ultrasound and room temperature, followed by 3,3',4,4'-biphenyltetramine , while adding acid-binding agent triethylamine, wherein the molar ratio of hexachlorocyclotriphosphazene and 3,3',4,4'-biphenyltetramine is 2:3, 3,3',4, The molar ratio of 4'-biphenyltetramine to acid-binding agent triethylamine is 1:4, the reaction time is 6 h, and acetic acid is added to adjust the pH value to neutral, and N 2 , so that the whole reacts in an oxygen-free state, and a white or light yellow solid block is obtained;

[0043] (3) The white or light yellow solid mass obtained in step (2) is vacuum filtered, washed with diox...

Embodiment 2

[0045](1) Add 10 g of clathrate silsesquioxane to a three-necked flask, add 200 ml of solvent acetone, and add 10 ml of dispersant polyvinyl alcohol, and stir mechanically for 0.5 h~1 h to prepare clathrate silsesquioxane Dispersions;

[0046] (2) Add hexachlorocyclotriphosphazene to the clathrate silsesquioxane dispersion obtained in step (1) under mechanical stirring, ultrasound and room temperature, and then add 3,3',4,4'- Biphenyltetramine, while adding acid-binding agent pyridine, wherein the molar ratio of hexachlorocyclotriphosphazene and 3,3',4,4'-biphenyltetramine is 2:3, 3,3', The molar ratio of 4,4'-biphenyltetramine to acid-binding agent triethylamine is 1:4, the reaction time is 6 h, and carbonic acid is added to adjust the pH value to neutral, and N 2 , so that the whole reacts in an oxygen-free state, and a white or light yellow solid block is obtained;

[0047] (3) The white or light yellow solid mass obtained in step (2) is vacuum filtered, washed with dioxa...

Embodiment 3

[0049] (1) Add 10 g of melamine phosphate into a three-necked flask, add 200 ml of solvent xylene, and add 10 ml of dispersant sodium tripolyphosphate, and stir mechanically for 0.5 h to 1 h to prepare a melamine phosphate dispersion;

[0050] (2) Add hexachlorocyclotriphosphazene to the melamine phosphate dispersion obtained in step (1) under mechanical stirring, ultrasound and room temperature, followed by 3,3',4,4'-biphenyltetramine , while adding acid-binding agent triethylamine, wherein the molar ratio of hexachlorocyclotriphosphazene and 3,3',4,4'-biphenyltetramine is 2:3, 3,3',4, The molar ratio of 4'-biphenyltetramine to acid-binding agent triethylamine is 1:4, the reaction time is 6 h, and hypochlorous acid is added to adjust the pH value to neutral, and N 2 , so that the whole reacts in an oxygen-free state, and a white or light yellow solid block is obtained;

[0051] (3) The white or light yellow solid mass obtained in step (2) is vacuum filtered, washed with diox...

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Abstract

The invention discloses a microcapsule flame retardant with high heat resistance and a preparation method of the microcapsule flame retardant. A core material adopts a flame retardant, a capsule material is a polyphosphazene cross-linked polymer obtained through a reaction of phosphonitrile with one or more of biphenyl polyamine, condensed aromatic polyamine and heterocyclic aromatic polyamine, and the mass ratio of the capsule material to the core material is (0.1:1)-(5:1). According to the preparation method, the flame retardant is dispersed in a solvent, phosphonitrile and one or more of biphenyl polyamine, condensed aromatic polyamine and heterocyclic aromatic polyamine are added, an acid-binding agent is added, the mixture reacts, and the microcapsule flame retardant is obtained. The capsule material contains a large quantity of aromatic structures, chemical weak bonds can be avoided, and the microcapsule flame retardant has higher heat resistance and good char forming performance; the capsule material contains a polyphosphazene cross-linked structure body with more nitrogen and phosphorus and imino groups, has the synergic nitrogen and phosphorus flame retarding characteristic and has a better time-sharing flame retarding effect with the core material; the aromatic structures contained in the capsule mateiral have good compatibility with a polymer matrix containing an aromatic ring on a main chain, the mechanical performance of the composite is excellent, and no remarkable dyeing effect is caused to the polymer matrix.

Description

technical field [0001] The invention belongs to the field of flame retardant modification, and in particular relates to a high heat-resistant microcapsule flame retardant and a preparation method thereof. Background technique [0002] Microencapsulation technology refers to the use of natural or synthetic coating materials to coat the coated substance to form a microcapsule technology with a closed capsule wall structure with a diameter of 1-1000 μm. In the field of flame retardant technology, the flame retardant of the inner capsule core is separated from the polymer matrix, and is not affected by the outside world at the initial stage. However, under appropriate conditions, the capsule wall ruptures so that the capsule core directly acts on the polymer matrix, giving a controllable Flame retardant and flame retardant control of different combustion processes bring convenience and efficiency. [0003] The capsule materials currently used are all thermosetting resins, such ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K9/10C08K3/22C08K5/549C08K5/3492C08L67/02
CPCC08K3/22C08K5/34928C08K5/549C08K9/10C08K2003/2227C08L2201/02C08L2201/08C08L67/02
Inventor 雷彩红徐灵峰徐睿杰陈贤德罗小刚陈敏仪
Owner GUANGZHOU WANBAO ELECTRONICS MATERIAL CO LTD