Flame-retardant nylon 6 and preparation method thereof

A flame retardant nylon and nylon technology, which is applied to the field of flame retardant nylon 6 and its preparation, can solve the problems of the decline of nylon 6 material, the increase of the amount of flame retardant, and the poor flame retardant effect of the flame retardant, so as to avoid performance degradation, The effect of less addition and good flame retardancy

Inactive Publication Date: 2015-07-01
泰索新材料科技(杭州)有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this invention, melamine and cyanurate are added to the nylon 6 polymerization system after non-polar modification, which can make nylon 6 have flame retardancy and improve mechanical properties to a certain extent, but the flame retardant effect of this flame retardant is Poor, in order to achieve a better flame retardant effect, the amount of flame retardant added must be greatly increased
However, a large amount of flame retardants will cause a large decline in the nylon 6 material

Method used

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  • Flame-retardant nylon 6 and preparation method thereof
  • Flame-retardant nylon 6 and preparation method thereof
  • Flame-retardant nylon 6 and preparation method thereof

Examples

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preparation example Construction

[0039] A preparation method of flame-retardant nylon 6, at first synthesizing aminomethylphenylphosphinic acid, the synthesis steps are:

[0040] 1) hydroxymethylphenylphosphinic acid, thionyl chloride and anisole with a molar ratio of 1:1:3 were heated and reacted in a reactor, the temperature of the heating reaction was 80°C, and the reaction time was 3 hours. After the reaction is finished, cool down to 20° C. and filter to obtain crystals of chloromethylphenylphosphinic acid. The filter paper used for filtering is a qualitative filter paper with a pore size of 30 to 120 microns;

[0041] 2) Adding chloromethylphenylphosphinic acid crystals to a concentration of 2wt% sodium hydroxide solution, the molar ratio of sodium hydroxide to chloromethylphenylphosphinic acid is 1:1, feed ammonia, When the ammonia gas is added, the reaction pressure is 0.1MPa, and the reaction is performed for 1 hour before filtering again. The filter paper used for filtering is a qualitative filter p...

Embodiment 2

[0051] A preparation method of flame-retardant nylon 6, at first synthesizing aminomethylphenylphosphinic acid, the synthesis steps are:

[0052] 1) Heat and react hydroxymethylphenylphosphinic acid, thionyl chloride and diphenyl ether in a reaction kettle with a molar ratio of 1:1:10, the temperature of the heating reaction is 80°C, and the reaction time is 6 hours. After the reaction is finished, cool down to 30° C. and filter to obtain chloromethylphenylphosphinic acid crystals. The filter paper used for filtering is a qualitative filter paper with a pore size of 30 to 120 microns;

[0053] 2) adding chloromethylphenylphosphinic acid crystals to a concentration of 50wt% sodium hydroxide solution, the molar ratio of sodium hydroxide to chloromethylphenylphosphinic acid is 1.1:1, feed ammonia, When the ammonia gas is added, the reaction pressure is 0.5 MPa. After 8 hours of reaction, filter again. The filter paper used in the filter is a qualitative filter paper with a pore s...

Embodiment 3

[0063] A preparation method of flame-retardant nylon 6, at first synthesizing aminomethylphenylphosphinic acid, the synthesis steps are:

[0064] 1) Heat and react hydroxymethylphenylphosphinic acid, thionyl chloride and chloromethyl ether in a reaction kettle with a molar ratio of 1:1:5, the temperature of the heating reaction is 50°C, and the reaction time is 5 hours After the reaction, cool down to 25°C and filter to obtain chloromethylphenylphosphinic acid crystals. The filter paper used for filtering is a qualitative filter paper with a pore size of 30 to 120 microns;

[0065] 2) adding chloromethylphenylphosphinic acid crystals to a concentration of 5wt% sodium hydroxide solution, the molar ratio of sodium hydroxide to chloromethylphenylphosphinic acid is 1.2:1, feed ammonia, When the ammonia gas is added, the reaction pressure is 0.3MPa, and after 3 hours of reaction, filter again. The filter paper used for the filter is a qualitative filter paper with a pore size of 30...

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Abstract

The invention relates to flame-retardant nylon 6 and a preparation method thereof. The flame-retardant nylon 6 is prepared by performing polymerization on a nylon polymerization monomer namely caprolactam, aminomethyl phenyl phosphinic acid and a polymer catalyst. The preparation method comprises the following steps: performing heating reaction on hydroxymethyl phenyl phosphinic acid, sulfoxide chloride and ether in a reaction kettle according to a certain mole ratio, putting the prepared chloromethyl phenyl phosphinic acid into a sodium hydroxide solution, and introducing ammonia gas into the sodium hydroxide solution to perform ammoniation reaction so as to prepare aminomethyl phenyl phosphinic acid; and performing polymerization on the nylon polymerization monomer namely caprolactam, aminomethyl phenyl phosphinic acid and the polymer catalyst to obtain the flame-retardant nylon 6. According to the flame-retardant nylon 6 provided by the invention, the aminomethyl phenyl phosphinic acid is added into a polymerization system of the flame-retardant nylon 6 to ensure that a flame retardant is perfectly combined with nylon 6, and the flame retardant cannot generate negative influence on the mechanical properties of the nylon 6, and can ensure that the nylon 6 has a very good flame retardant effect under the condition that very little flame retardant is added.

Description

technical field [0001] The invention belongs to the technical field of new flame retardant materials, and relates to a flame retardant nylon 6 and a preparation method thereof, in particular to a flame retardant obtained by performing halogenation reaction and ammoniation reaction on p-hydroxymethylphenylphosphinic acid respectively. Aminomethylphenylphosphinic acid, flame-retardant nylon 6 prepared by polymerizing aminomethylphenylphosphinic acid, caprolactam and a polymer catalyst in a reactor and a preparation method thereof. Background technique [0002] With the development of China's synthetic material industry and the continuous expansion of application fields, flame retardants have broad market prospects in various fields such as chemical building materials, electronic appliances, transportation, aerospace, daily furniture, interior decoration, and basic necessities of life. With people's increasing awareness of environmental protection, safety and health, countries ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G69/42
Inventor 陆炅毛惠敏石建华
Owner 泰索新材料科技(杭州)有限公司
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