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Microencapsulation ammonium polyphosphate fire retardant and preparation method thereof

An ammonium polyphosphate and microencapsulation technology, which is applied in microcapsule preparation, microsphere preparation, textile and papermaking, etc., can solve the problems of increasing water content of flame retardant coating, reducing hygroscopicity of ammonium polyphosphate, and surface wet sticking.

Active Publication Date: 2015-01-28
LIAONING FIXED STAR FINE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as an inorganic powder material, its application defects are also obvious, especially in the application of flame retardant textiles, ammonium polyphosphate has strong hygroscopicity, which will increase the water content of the flame retardant coating of the fabric, resulting in fabric weight increase, the surface is wet and sticky, thereby reducing the strength and other application properties of flame-retardant fabrics
[0004] In order to reduce the hygroscopicity of ammonium polyphosphate, the commonly used method is to microencapsulate ammonium polyphosphate, including melamine microencapsulation, isocyanate microencapsulation, silicone oil microencapsulation, melamine formaldehyde microencapsulation and other microencapsulation technologies , but the solubility of these microencapsulated ammonium polyphosphates (g / 100mlH 2 O, 25°C) index is still high, and generally can only be applied to flame retardant of wood, plastic, etc., and cannot meet the requirements of flame retardant finishing of textiles

Method used

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  • Microencapsulation ammonium polyphosphate fire retardant and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Raw material ratio: crystal phase II ammonium polyphosphate (APP II) 100 grams, melamine 4 grams, diphenylmethane diisocyanate (MDI) 11.1 grams, triphenylmethane triisocyanate 0.42 grams, dicyclohexylcarbodiimide 5.2 grams , 0.55 grams of trimethylolethane, 121 grams of acetone, and 27.4 grams of toluene.

[0024] Process method:

[0025] (1) Add melamine and crystalline phase II ammonium polyphosphate (APPⅡ) into the ball mill, heat to 240-250°C, grind for 80-100 minutes, then cool down to 40-45°C; make the surface of APPⅡ covered with a layer of melamine membrane;

[0026] (2) Add APPⅡ and acetone coated with melamine film into the mixing kettle for stirring and mixing;

[0027] (3) Homogeneously emulsify the above mixed material with a homogeneous emulsifier to form a suspension with a particle size of 10-15 μm;

[0028] (4) Put the above-mentioned homogenized suspension into the reaction kettle, and then add toluene, diphenylmethane diisocyanate (MDI), triphenylm...

Embodiment 2

[0031] Raw material ratio: crystal phase II ammonium polyphosphate (APP II) 101 grams, melamine 4.4 grams, diphenylmethane diisocyanate (MDI) 11.4 grams, triphenylmethane triisocyanate 0.43 grams, dicyclohexylcarbodiimide 5.4 grams , 0.7 gram of trimethylolethane, 124 gram of acetone, 28.6 gram of toluene; Process method is with embodiment 1.

Embodiment 3

[0033] Raw material ratio: crystal phase II ammonium polyphosphate (APP II) 101.8 grams, melamine 4.3 grams, diphenylmethane diisocyanate (MDI) 11.2 grams, triphenylmethane triisocyanate 0.48 grams, dicyclohexylcarbodiimide 5.1 grams , 0.75 gram of trimethylolethane, 123 gram of acetone, 28 gram of toluene; Process method is with embodiment 1

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Abstract

The invention relates to a microencapsulation ammonium polyphosphate fire retardant and a preparation method thereof. The microencapsulation ammonium polyphosphate fire retardant is prepared from the following raw materials in percentage by weight: 100%-102% of crystal phase APP II (Ammonium Polyphosphate II), 4%-4.5% of melamine, 11%-11.5% of MDI (Diphenylmethane Diisocyanate), 0.4%-0.5% of triphenylmethane triisocyanate, 5%-5.5% of dicyclohexylcarbodiimide, 0.5%-0.8% of trimethylolethane, 120%-125% of acetone and 27%-29% of methylbenzene and is prepared through a double-layer coating process procedure. The microencapsulation ammonium polyphosphate fire retardant disclosed by the invention has the characteristics of easiness for dispersion, good compatibility, high stability, low hygroscopicity and high fire-retardant property.

Description

technical field [0001] The invention relates to a microencapsulated ammonium polyphosphate flame retardant and a preparation method thereof, which is a microencapsulated flame retardant powder material and can meet the quality requirements of textile flame retardant finishing applications. Background technique [0002] Flame-retardant textiles are commonly used functional textiles, and textile flame-retardant coatings are a common textile flame-retardant finishing technology. This finishing technology essentially uses adhesives to adhere flame retardant components to the surface of textiles. , so as to achieve the overall flame retardant effect of textiles. As people's requirements for flame-retardant textiles are getting higher and higher, traditional textile flame-retardant coatings use a large number of halogen-containing flame retardants, and halogen-containing flame retardants will decompose a large amount of toxic and harmful smoke in high-temperature environments. in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J13/02D06M23/12
Inventor 高凯孙继昌李秀颖王冠中仇凯
Owner LIAONING FIXED STAR FINE CHEM
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