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Kernel-shell type silicon-containing synergistic flame retardant and preparation thereof

A synergistic flame retardant and flame retardant technology, applied in the field of flame retardants, can solve problems such as limited coating effect, achieve good recycling effect, good coating effect, and improve processing performance.

Active Publication Date: 2009-03-04
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] 3,131,508 selected alkoxy-containing silicones to microencapsulate halogen-free flame retardants and ammonium cyanurate flame retardants made of oxalic acid, phthalic acid, and isocyanic acid. Direct dripping, spraying, injection or suspension coating in the presence of organic solvents, but alkyl siloxy silicone oil cannot interact well with flame retardants, and the coating effect is limited

Method used

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  • Kernel-shell type silicon-containing synergistic flame retardant and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Add 50ml of deionized water and 150ml of ethanol to a reaction kettle equipped with a stirring and reflux device. After stirring evenly, add 50g of ammonium polyphosphate and 1g of OP-10, heat to 45°C while stirring, and add concentrated ammonia water to adjust the pH value to 9. ~11, then slowly add 5g of organosilicon oxide compound dropwise at a rate of 3ml / min, stir for 150min, then lower the reaction kettle to room temperature, filter, wash, and dry the filter cake at 120°C and 30mmHg to obtain 51.4 g of the core-shell silicon-containing synergistic flame retardant product of the present invention with good fluidity.

[0028] If other conditions remain unchanged, the flame retardant ammonium polyphosphate in this embodiment is replaced by antimony trioxide, aluminum hydroxide, magnesium hydroxide, aluminum oxalate, calcium aluminate, calcium carbonate, hydroxide Inorganic flame retardants including calcium, zinc borate, borax, expanded graphite or red phosphorus; ...

Embodiment 2

[0030] Add 50ml of deionized water and 150ml of ethanol to a reaction kettle equipped with a stirring and reflux device. After stirring evenly, add 50g of ammonium polyphosphate and 1g of OP-10, heat to 45°C while stirring, add concentrated ammonia water, and adjust the pH value at 9 to 11, then slowly add 7.5g of organosilicon oxide compound dropwise at a rate of 5ml / min, the dropwise addition is completed within 25 minutes, and the reaction is stirred for 180 minutes, then the reactor is lowered to room temperature, filtered, washed, and the filter cake is Dry at 120°C and 30mmHg to obtain 52.6g of the core-shell silicon-containing synergistic flame retardant product of the present invention with good fluidity.

Embodiment 3

[0032] Add 50ml of deionized water and 150ml of ethanol to a reaction kettle equipped with a stirring and reflux device. After stirring evenly, add 50g of ammonium polyphosphate and 1g of OP-10, heat to 45°C while stirring, add concentrated ammonia water, and adjust the pH value at 9 to 11, then slowly add 10 g of organosilicon oxide compound dropwise at a rate of 3 ml / min, stir for reaction, after reacting for 330 minutes, cool, filter, wash, and dry the filter cake at 120°C and 30 mmHg to obtain 53.3 g of free The core-shell silicon-containing synergistic flame retardant product of the invention has good fluidity.

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Abstract

The invention discloses core-shell silicon-containing synergetic flame retardant and a preparation method thereof. The invention is characterized in that non-halogen flame retardant is added into the aqueous liquid of ethanol and the pH value is adjusted to be 8 to 12 by an alkaline liquid under the temperature between 30 and 90 DEG C; a surface active agent and a silicone oxonium compound are added for reacting for 2 to 4 hours, thus obtaining the core-shell silicon-containing synergetic flame retardant which takes the non-halogen flame retardant decorated by the surface active agent as a core and takes the poly- silicone oxonium compound generated by the silicone oxonium compound under an alkaline condition as a shell layer; wherein, the weight ratio of the non-halogen flame retardant to the silicone oxonium compound is 2.3 to 19. The average grain diameter of the obtained product is not remarkably increased; the free fluidity of the grains is good; the shell layer is compact and uniform; the water property is greatly reduced; the high temperature water resistance is remarkably improved; the product can be used as the flame retardant of macromolecular materials like polyolefin, rubber, foaming plastics, and the like. Besides, the product can also be used for the inflaming retarding of paper, wood, fabrics, and the like.

Description

technical field [0001] The invention belongs to the technical field of flame retardants, and in particular relates to a core-shell silicon-containing synergistic flame retardant and a preparation method thereof. Background technique [0002] As people pay more and more attention to environmental protection and personal health, the European Union issued the "Directive on the Prohibition of the Use of Certain Hazardous Substances in Electrical and Electronic Equipment" ("ROHS Directive"), which makes manufacturers of flame-retardant materials in various countries begin to use caution The attitude towards the application of brominated flame retardants in polymers has led to the emergence of non-halogenated flame retardants, especially phosphorus-based flame retardants, which are constantly moving from the laboratory to the market. On pages 13-20 and 48-53 of the book "Basics and Applications of Halogen-Free Flame-Retardant Polymers" (Wang Jianqi, Science Press, 2005.6), it is p...

Claims

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Application Information

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IPC IPC(8): C09K21/00C08K9/10
Inventor 胡源倪健雄宋磊
Owner UNIV OF SCI & TECH OF CHINA
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