Preparation method of modified non-halogen fire retardant

A manufacturing method and technology of flame retardants, applied in the direction of fire retardant coatings, etc., can solve problems such as the decline of mechanical properties of flame retardant materials, adverse effects on material properties, and restrictions on large-scale production, and achieve improved compatibility, good processing performance, and production. Efficient effect

Inactive Publication Date: 2007-07-04
SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Such as 89106452.4, 91107410.4, 96115709.7, 97105904.7, 01107484.1, 02148553.4, and the masterbatch method has a high organic content; Molecules, which have a negative impact on the final properties of the material; on the other hand, if the polar non-halogenated flame retardant is directly added to the non-polar polymer, due to poor compatibility and poor dispersion in the polymer, it cannot achieve Flame retardant effect, while the mechanical properties of flame retardant materials are significantly reduced
[0007] There are reports on the microencapsulation of non-halogenated flame retardants by in-situ polymerization, but the production process is complicated, the cycle is long, and the cost is high, which limits its large-scale production and is difficult to realize industrialization

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Stir 100g of montmorillonite flame retardant in a high-shear kneader with a heating temperature of 25-200°C, slowly add 40g of styrene and 3g of initiator at the side feed port, and fully stir and polymerize at a stirring speed of 1200rpm for 50min , A highly filled flame retardant.

[0024] Product performance: Take a certain amount of the above-mentioned modified inorganic flame retardant and mechanically mix it with high-impact polystyrene, and then melt and extrude it.

[0025] 1. Flame retardant performance

[0026] Injection molding spline, sample size: 130×13×3(mm)

[0027] The flame application time is 10s, and the burning time of the six samples is less than 60s, and the burning time of each sample is less than 10s, reaching the UL-94FV-0 level.

[0028]2. Processing performance: The modified flame retardant can be extruded smoothly under high filling amount during processing, while the unmodified flame retardant cannot be extruded normally under this conditi...

Embodiment 2

[0030] Stir 100g of nano-silica flame retardant in a high-shear kneader with a heating temperature of 25-200°C, slowly add 10g of methyl methacrylate and 0.5g of initiator to the side feed port, and fully Stir and polymerize for 45 minutes to obtain a modified flame retardant.

[0031] Product performance: Take a certain amount of the above-mentioned modified non-halogen flame retardant and mechanically mix with ethylene-vinyl acetate copolymer, and then melt extrusion molding.

[0032] Flame retardant performance test:

[0033] Injection molding spline, sample size: 130×13×3(mm)

[0034] The flame application time is 10s, and the burning time of the six samples is less than 60s, and the burning time of each sample is less than 10s, reaching the UL-94FV-0 level.

Embodiment 3

[0036] Stir 100g of melamine flame retardant in a high-shear kneader with a heating temperature of 25-200°C, slowly add 20g of dibutyl maleate and 1g of initiator to the side feed port, and fully stir and polymerize at a stirring speed of 1000rpm. Polymerize for 70 minutes to obtain a modified flame retardant.

[0037] Product performance: Take a certain amount of the above-mentioned modified flame retardant and mechanically mix with ethylene-propylene rubber, and then melt and extrude.

[0038] Flame retardant performance test:

[0039] Injection molding spline, sample size: 130×13×3(mm)

[0040] The flame application time is 10s, and the burning time of the six samples is less than 60s, and the burning time of each sample is less than 10s, reaching the UL-94FV-0 level.

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PUM

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Abstract

The invention relates to a method for producing modified non- halogen flame retardant, it employs in-situ polymerization and comprises following steps: putting non- halogen flame retardant into kneader with high cottage at 25- 200 Deg. C, stirring thoroughly, feeding inclinly, adding polymeric monomer and initiator for thorough polymerization, and getting packed modified non- halogen flame retardant. The invention is characterized in that it uses no solvent, the polymerization time is short, and the productivity is high, suitable for industrial production, and the shell thickness and strength of microcapsule are easy to control. The modified flame retardant is characterized by large stacking density, sound flame retardance, high concentration, strong currency and good processing performance.

Description

field of invention [0001] The invention relates to a method for producing a flame retardant, in particular to a method for producing a modified non-halogen flame retardant. Background technique [0002] Polymer materials have been widely used in transportation, transportation, construction, electrical and electronic, chemical and other fields, and play a huge role in the construction of the national economy. However, the vast majority of polymers are flammable. They generate high heat and high temperature during combustion, black smoke generated by incomplete combustion, and toxic corrosive gases released, which bring great harm to firefighting and lifesaving work. difficulty. In order to solve and eliminate this hidden danger, flame retardants came into being. For the flame retardancy of polymers, physical methods and chemical methods are usually included. The chemical method mainly uses reactive flame retardants, which introduce flame retardant elements into the molecul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K21/14C08F12/08C08F20/00C08F22/00C08F4/04C08F4/40C08F4/28
Inventor 常素琴解廷秀杨桂生
Owner SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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