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Polyamide 56 material prepared from bio-based 1,5-pentamethylene diamine

A technology of polyamide and pentamethylene diamine, which is applied in the field of polyamide materials, can solve the problems affecting the application of flame-retardant polyamide materials, the high cost of flame-retardant materials, and the increase of potential safety hazards, and achieves wide industrial application prospects and excellent resistance. Burning effect, high safety effect

Active Publication Date: 2016-11-23
CATHAY R&D CENT CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Polyamide materials with flame retardant properties are one of the common polyamide materials. Most of the existing types are composed of flame retardants, polyamide 66 (nylon 66), polyamide 6, etc. Usually, in order to ensure flame retardant properties, The addition of flame retardants in composite materials is relatively large. Although the flame retardant performance is improved, it also leads to more defects in practical applications. For example, when it is used as a spinning material, the spinning performance is poor, In serious cases, it even leads to the inability to spin, and there are many defects when it is used as engineering plastics. First, a large dose of flame retardants leads to high toxicity, and the safety hazards in production and use have increased sharply. Secondly, a large number of Flame retardants may also lead to changes in the chemical composition of nylon, resulting in changes in its physical and chemical properties. Therefore, additional additives must be added to ensure plastic properties, such as plasticizers, tougheners, etc. Flame retardants make the cost of flame retardant materials high, which seriously affects the application of flame retardant polyamide materials

Method used

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  • Polyamide 56 material prepared from bio-based 1,5-pentamethylene diamine
  • Polyamide 56 material prepared from bio-based 1,5-pentamethylene diamine
  • Polyamide 56 material prepared from bio-based 1,5-pentamethylene diamine

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Experimental program
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Effect test

Embodiment 1

[0086] The preparation of embodiment 1 polyamide 56 flame retardant material

[0087] (1) Mix adipic acid, 1,5-pentanediamine, melamine cyanurate (MCA) and water in the reactor evenly, wherein the weight sum of dibasic acid and diamine accounts for 50% of the total weight of the solution %, take a small amount of salt solution and dilute to 10% and detect that the pH value is 8.22 at 25°C to make a polyamide 56 salt solution with a mass percent concentration of 50%; wherein, the addition of MCA is 3% (percentage is 3% of polyamide 56% by mass of flame retardant material);

[0088] (2) The polyamide 56 salt solution is concentrated to a polymer concentration of 80% under the conditions of a pressure of 0.3 MPa and a temperature of 120°C;

[0089] (3) Heating the system, gradually increasing the pressure to 1.8MPa, and maintaining the pressure for prepolymerization until the system temperature reaches 245°C;

[0090] (4) Gradually reduce the pressure until the vacuum degree re...

Embodiment 2

[0094] Preparation of embodiment 2 polyamide 56 flame retardant material

[0095] (1) Mix adipic acid, 1,5-pentanediamine, melamine phosphate and water in the reactor, wherein the sum of dibasic acid and diamine accounts for 60% of the total weight of the solution, and both The molar ratio is 1:1.1, and the addition amount of melamine phosphate is 5% (the percentage is the mass percentage accounting for the polyamide 56 flame retardant material);

[0096] (2) The polyamide 56 salt solution is concentrated to a polymer concentration of 70% under the conditions of a pressure of 0.15 MPa and a temperature of 150°C;

[0097] (3) Heating the system, gradually increasing the pressure to 1.5MPa, and maintaining the pressure for prepolymerization until the system temperature reaches 255°C;

[0098] (4) Gradually reduce the pressure until the vacuum degree reaches -0.1MPa (gauge pressure), and the system temperature reaches 275°C;

[0099] (5) The system is maintained at -0.1MPa, and...

Embodiment 3

[0102] Preparation of embodiment 3 polyamide 56 flame retardant material

[0103] (1) Adipic acid, 1,5-pentanediamine, melamine polyphosphate and water are mixed uniformly in a reactor, wherein the weight sum of dibasic acid and diamine accounts for 60% of the total weight of the solution, and two The molar ratio is 1:1.1, and the addition of melamine polyphosphate is 5% (percentage is the mass percentage accounting for polyamide 56 flame retardant material);

[0104] (2) The polyamide 56 salt solution is concentrated to a polymer concentration of 80% under the conditions of a pressure of 0.1 MPa and a temperature of 120°C;

[0105] (3) Heating the system, gradually increasing the pressure to 1.6MPa, and maintaining the pressure for prepolymerization until the system temperature reaches 250°C;

[0106] (4) Gradually reduce the pressure until the degree of vacuum reaches -0.09MPa (gauge pressure), and the system temperature reaches 240°C;

[0107] (5) The system is maintained...

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Abstract

The invention provides a polyamide 56 material prepared from bio-based 1,5-pentamethylene diamine. The polyamide 56 material is renewable and has the high flame-retardant property. The polyamide 56 material comprises polyamide 56 and a composition of nitrogen-containing flame retardants or is a polymer formed by pentamethylene diamine, adipic acid and nitrogen-containing flame retardants serving as a polymeric monomer. The material is good in flame-retardant effect, low in toxicity, high in safety, low in cost and capable of being used as engineering plastics and a spinning material. According to the material, the preparation process is simple and convenient, and wide industrial application prospects are achieved.

Description

technical field [0001] The invention relates to the field of polyamide materials, in particular to a renewable and highly flame-retardant polyamide 56 material prepared from bio-based 1,5-pentanediamine. Background technique [0002] Polyamide materials with flame retardant properties are one of the common polyamide materials. Most of the existing types are composed of flame retardants, polyamide 66 (nylon 66), polyamide 6, etc. Usually, in order to ensure flame retardant properties, The addition of flame retardants in composite materials is relatively large. Although the flame retardant performance is improved, it also leads to more defects in practical applications. For example, when it is used as a spinning material, the spinning performance is poor, In serious cases, it even leads to the inability to spin, and there are many defects when it is used as engineering plastics. First, a large dose of flame retardants leads to high toxicity, and the safety hazards in productio...

Claims

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Application Information

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IPC IPC(8): C08G69/28C08K5/3492C08K5/52C08K3/32C08L77/06D01F6/90D01F1/07
CPCC08G69/28C08K3/32C08K5/34924C08K5/5205C08K2003/323C08L2201/02C08L2203/12D01F1/07D01F6/90C08L77/06
Inventor 刘修才郑毅孙朝续
Owner CATHAY R&D CENT CO LTD
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