A kind of semi-aromatic and aliphatic polyamide block copolymer and its preparation method

A technology of aliphatic polyamide and block copolymer, which is applied in the field of semi-aromatic and aliphatic polyamide block copolymer and its preparation, can solve the problems of heavy pollution, low industrialization value and high cost, etc. To achieve the effect of expanding the application field

Active Publication Date: 2016-08-10
KINGFA SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In terms of the preparation process of semi-aromatic polyamides, although there are a large number of patents for the synthesis of various polyamide copolymers, such as PA6T / 66, PA6T / 6I and PA10T / 1012, etc., but about semi-aromatic block polyamides There are few patents and documents related to the preparation method; Chinese patent CN101469070A proposes a method for synthesizing polyamide block polymers, which uses N,N-dimethylacetamide as a reaction solvent under anhydrous conditions, and Add LiCl and pyrrole, etc., and use diamine and acid chloride as reaction monomers to obtain 6T and 66 prepolymers respectively, and then mix the two to obtain block copolymers; this method uses organic solvents and requires strict water removal. The pollution is very high, the cost is high, and the value of industrialization is not high; Novitsky et al. (Journal of Polymer Science Part A: Polymer Chemistry. Volume 49, Issue 10, pages 2271-2280) use terephthaloyl-bis(caprolactam) and dodecyl diamine as a monomer, react in a caprolactam solvent to obtain a PA12T macroinitiator, which then undergoes anionic polymerization to obtain a PA(12T-b-6) block copolymer; Some polymerization devices for the preparation of ordinary semi-aromatic polyamides can realize the preparation method of semi-aromatic and aliphatic polyamide block copolymers has not yet been reported

Method used

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  • A kind of semi-aromatic and aliphatic polyamide block copolymer and its preparation method
  • A kind of semi-aromatic and aliphatic polyamide block copolymer and its preparation method
  • A kind of semi-aromatic and aliphatic polyamide block copolymer and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment A1-A4

[0032] Examples A1-A4: Preparation of semi-aromatic polyamide prepolymers

[0033] In the autoclave equipped with magnetic coupling stirring, condenser, gas phase port, feed port, pressure explosion-proof port, add the reaction raw materials according to the ratio in Table 1; the amount of benzoic acid is the total amount of diamine, diacid, lactam and amino acid 2.5% of the amount of substance, the weight of sodium hypophosphite is 0.1% of the weight of other feeds except deionized water, and the weight of deionized water is 30% of the weight of the total feed; Heat up to 220 within hours o C, the reaction mixture was heated at 220 o C was stirred for 1 hour, and then the temperature of the reactant was raised to 230 o C; response at 230 o The constant temperature of C and the constant pressure of 2.2MPa continued for 2 hours, and the pressure was kept constant by removing the formed water. After the reaction was completed, the material was discharged, and the prepolymer w...

Embodiment B5-B9

[0034] Example B5-B9: Preparation of Aliphatic Polyamide Prepolymer

[0035]In the autoclave equipped with magnetic coupling stirring, condensation pipe, gas phase port, feeding port, pressure explosion-proof port, add the reaction raw materials according to the ratio in Table 1; the amount of benzoic acid is the total amount of diamine, diacid, lactam and amino acid 2.5% of the amount of substance, the weight of sodium hypophosphite is 0.1% of the weight of other feeds except deionized water, and the weight of deionized water is 30% of the weight of the total feed; Heat up to 200 within hours o C, the reaction mixture was heated at 200 o C was stirred for 1 hour, and then the temperature of the reactant was raised to 210°C with stirring o C; response at 210 o The constant temperature of C and the constant pressure of 2.2MPa continued for 2 hours, and the pressure was kept constant by removing the formed water. After the reaction was completed, the material was discharged, ...

Embodiment C10-C18

[0036] Examples C10-C18: Preparation of semi-aromatic and aliphatic polyamide block copolymers

[0037] Add the reaction raw materials according to the ratio in Table 2 in the autoclave equipped with magnetic coupling stirring, condenser, gas phase port, feeding port, and pressure explosion-proof port. The weight of deionized water is 30% of the total feeding weight; vacuumize and fill high-purity nitrogen as a protective gas, and heat up to 200 within 2 hours under stirring. o C, the reaction mixture was heated at 200 o C was stirred for 1 hour, and then the temperature of the reactant was raised to 210°C with stirring o C; response at 210 o The constant temperature of C and the constant pressure of 2.2MPa continued for 2 hours, and the pressure was kept constant by removing the formed water. After the reaction was completed, the material was discharged, and the prepolymer was at 80 o C under vacuum drying 24 hours, obtain prepolymerized product; Described prepolymerized p...

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Abstract

The invention discloses a semi-aromatic and aliphatic polyamide block copolymer, wherein the mole percentage content of the semi-aromatic polyamide block is 40-99%, the mole percentage content of the aliphatic polyamide block is 1-60%, the number of repeat units of the semi-aromatic polyamide block is 2-10, and the number of the repeat units of the aliphatic polyamide block is 2-10; the preparation method comprises the following steps: firstly, preparing a semi-aromatic polyamide prepolymer and an aliphatic polyamide prepolymer; polymerizing the two prepolymers again to obtain a block prepolymer, and increasing the viscosity of solid phase to obtain the block polymer. According the preparation method, the feed ratio of the semi-aromatic polyamide prepolymer to the aliphatic polyamide prepolymer is controlled to obtain the semi-aromatic and aliphatic polyamide block copolymer with controllable block length and controllable block number, thereby expanding the application fields of the polyamide material and meeting the performance demands of different environments on the polyamide material.

Description

technical field [0001] The invention relates to the field of polymer materials, in particular to a semi-aromatic and aliphatic polyamide block copolymer and a preparation method thereof. Background technique [0002] Polyamide is widely used because of its good comprehensive properties, including mechanical properties, heat resistance, wear resistance, chemical resistance and self-lubrication, low coefficient of friction, certain flame retardancy, and easy processing. It is suitable for filling and modifying with glass fiber and other fillers to improve performance and expand application range. In recent years, semi-aromatic polyamides have been focused on development due to their better heat resistance and mechanical properties. [0003] In terms of the preparation process of semi-aromatic polyamides, although there are a large number of patents for the synthesis of various polyamide copolymers, such as PA6T / 66, PA6T / 6I and PA10T / 1012, etc., but about semi-aromatic block p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G69/26C08G69/28
Inventor 张传辉袁志敏蔡彤旻吉继亮曾祥斌曹民夏世勇殷年伟饶湘
Owner KINGFA SCI & TECH CO LTD
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