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Migration resistant halogen-free intumescent flame retardant and preparation method and application thereof

An intumescent flame retardant, anti-migration technology, applied in the direction of organic chemistry, can solve the problems of poor compatibility, easy to be destroyed, low surface treatment efficiency, etc., achieve the effect of anti-migration and precipitation performance, and improve water resistance

Active Publication Date: 2014-10-15
HANGZHOU JLS FLAME RETARDANTS CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of easy moisture absorption and poor water resistance of halogen-free intumescent flame retardants, poor compatibility in polymers such as polyolefins, easy migration and precipitation under high temperature and high humidity, low surface treatment efficiency, and easy damage, the present invention A migration-resistant halogen-free intumescent flame retardant and its preparation method and application are proposed. The invention realizes the cross-linking between flame retardant molecules and improves water resistance, especially the migration and precipitation resistance under high temperature and high humidity conditions.

Method used

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  • Migration resistant halogen-free intumescent flame retardant and preparation method and application thereof
  • Migration resistant halogen-free intumescent flame retardant and preparation method and application thereof
  • Migration resistant halogen-free intumescent flame retardant and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] (1) Preparation of phosphorus silicon compound

[0039] The horizontal reactor is filled with nitrogen and vacuumized. After three cycles, 132 kg of diammonium hydrogen phosphate (required moisture <0.1%) is added under the protection of nitrogen. 136 kg of trimethoxysilane was stirred for 2 hours. Raise the temperature to 90°C, start vacuuming and devolatilization, the vacuum degree is 0.05Mpa, and continue the reaction for 10 hours to obtain the phosphorus silicon compound 1.

[0040] (2) Preparation of Polymer A

[0041] Put 23.6 kg of phosphorus silicon compound 1 and 105.6 kg of diammonium hydrogen phosphate (DAP) into the kneading reactor, stir evenly, add 0.10 kg of water, stir for 2 hours, add phosphorus pentoxide (P 2 o 5 ) 142 kilograms, stir evenly, start to heat up and ventilate ammonia. React at 200°C-280°C for 4 hours, wherein the ratio of the amount of ammonia introduced to the reactant is 100 kg, and the amount of ammonia passed through the reactant ...

Embodiment 2

[0047] The steps of Example 2 are the same as those of Example 1. In step (2), 11.8 kg of silicon-phosphorus compound 1 and 119 kg of diammonium hydrogen phosphate (DAP) are put into the step (2) to obtain a migration-resistant halogen-free intumescent flame retardant 2 .

Embodiment 3

[0049] (1) Preparation of phosphorus silicon compound

[0050] The horizontal reactor is filled with nitrogen and vacuumized. After three cycles, 132 kg of diammonium hydrogen phosphate (required moisture <0.1%) is added under the protection of nitrogen, and 198 kg of phenyltrimethoxysilane is sprayed under stirring at 100°C. , and stirred for 2 hours. Raise the temperature to 180°C, start vacuuming and devolatilization, the vacuum degree is 0.05Mpa, and continue the reaction for 8 hours to obtain the phosphorus silicon compound 3.

[0051] (2) Preparation of Polymer A

[0052] 34.2 kg of phosphosilicate compound 3 and 105.6 kg of diammonium hydrogen phosphate (DAP) were put into the kneading reactor. The rest of the preparation method is the same as in Example 1, and the migration-resistant halogen-free intumescent flame retardant 3 is prepared.

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Abstract

The invention relates to the technical field of flame retardants, aims to solve the problems that a halogen-free intumescent flame retardant is easy to absorb moisture, is poor in water resistance, poor in compatibility in polyolefin and other polymers, is easy to migrate and precipitate under high temperature and high humidity conditions, and is low in surface treatment processing efficiency, easy to be damaged, and the like, discloses a migration resistant halogen-free intumescent flame retardant and a preparation method and application thereof, the migration resistant halogen-free intumescent flame retardant and preparation method and application thereof has a structural formula (I) as shown in the specification, the migration resistant halogen-free intumescent flame retardant realizes the flame retardant intermolecular crosslinking, and improves the water resistance, especially migration resistance and precipitation performance under high temperature and high humidity conditions.

Description

technical field [0001] The invention relates to the technical field of flame retardant preparation, in particular to a migration-resistant halogen-free expansion flame retardant and its preparation method and application. Background technique [0002] The halogen-free intumescent halogen-free flame retardant based on ammonium polyphosphate has become a relatively successful halogen-free flame retardant in industrialization, and is widely used in polyolefins such as polypropylene, polyethylene, EVA, EPDM, POE, thermoplastic Elastomers such as polyurethane elastomers, TPE, and TPV have good flame retardant efficiency and good processing performance, and have satisfactory results on the mechanical properties of materials. However, as a phosphorus polymer, it has the problems of easy moisture absorption and hydrolysis, especially under high temperature and high humidity conditions, and it is easy to migrate and precipitate. In addition, it has poor compatibility with non-polar m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G81/00C08G79/04C08L23/12C08L85/02C07F19/00
Inventor 朱峰刘君锭吴伟俊
Owner HANGZHOU JLS FLAME RETARDANTS CHEM
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