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Process for preparing micro-encapsulated expansion-type N-P flame-retarding agent

An intumescent flame retardant and microencapsulation technology, which can be used in fire-resistant coatings and other directions, can solve the problems of unsatisfactory compatibility between flame retardants and polyolefins, high processing costs, and difficult industrialization.

Inactive Publication Date: 2004-09-08
BALING PETRO CHEM CO LTD SINOPEC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above technologies have disadvantages such as high processing costs, unsatisfactory compatibility between flame retardants and polyolefins, and difficulty in industrialization.

Method used

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  • Process for preparing micro-encapsulated expansion-type N-P flame-retarding agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] In a 5-liter three-necked bottle equipped with a thermometer, a reflux condenser, and a strong stirrer, add a certain amount of toluene, then add 1000g of nitrogen-phosphorus intumescent flame retardant, stir well, and then add 50g of unsaturated polyester resin After the unsaturated polyester resin is uniformly dispersed in toluene, add 1.5g of benzoyl peroxide, slowly raise the temperature to 100°C, and keep it at this temperature for 2 hours, then lower it to room temperature, filter, and put the filter cake Dry in an oven at 100°C to 110°C for 24 hours, then pulverize to obtain BIFR.

Embodiment 2

[0025] In a 5-liter three-necked bottle equipped with a thermometer, a reflux condenser, and a strong stirrer, add a certain amount of xylene, then add 1000g of nitrogen-phosphorus intumescent flame retardant, stir well, and then add 50g of unsaturated polyester Resin, after the unsaturated polyester resin is uniformly dispersed in xylene, add 1.5g of benzoyl peroxide, slowly heat up to 100°C, and keep warm at this temperature for 2 hours, then cool down to room temperature, filter, and filter The cake was dried in an oven at 100°C to 110°C for 24 hours, and then crushed to obtain BIFR.

Embodiment 3

[0027] In a 5-liter three-necked bottle equipped with a thermometer, a reflux condenser, and a strong stirrer, add a certain amount of toluene, then add 1000g of nitrogen-phosphorus intumescent flame retardant, stir well, and then add 50g of unsaturated polyester resin , after the unsaturated polyester resin is uniformly dispersed in toluene, add 1.5g of tert-butyl peroxy-2-ethylhexanoate, slowly raise the temperature to 100°C, keep it at this temperature for 2 hours, and then drop to Filter at room temperature, dry the filter cake in an oven at 100-110°C for 24 hours, then pulverize to obtain BIFR.

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Abstract

A micro-encapsulated expansion-type N-P flame-retarding agent is prepared through pulverizing the expansion-type N-P flame-retarding agent by a granularity larger than 400 meshes, then dispersing it along with unsaturated polyester resin in inertial solvent, adding trigger, heating to 80-100 deg.C and solidifying reaction of unsaturated polyester resin so to obtain the said flame-retarding agent micro-grains as crystal nucleus with a verythin layer of resin film on it, that is the required product. Its advantage is lower water solubility.

Description

technical field [0001] The invention relates to a production method of a microencapsulated nitrogen-phosphorus expansion flame retardant. Background technique [0002] In recent years, with the enhancement of people's awareness of environmental protection and the continuous improvement of relevant laws and regulations in various countries, the use of halogen-containing flame retardants has been gradually restricted due to the generation of toxic gases during combustion. Agents have become a new trend of development. Among the halogen-free flame retardants, the intumescent flame retardant (IFR) is the most important one. IFR generally uses nitrogen and phosphorus as the main flame retardant elements. It is named after the flame retardant material foams and expands to form a porous carbon layer during combustion, and this is the main characteristic. IFR has good flame retardant effect, low smoke, and non-toxicity. It has incomparable advantages over other types of flame reta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K21/14
Inventor 毛顺利何思列李曙红邢志军熊炳仕
Owner BALING PETRO CHEM CO LTD SINOPEC