Dipolyamine-modified copolyamide and preparation method thereof

A technology of copolyamide and dimeramine, applied in the field of polyamide, can solve the problems of difficult to obtain satisfactory comprehensive performance, not resistant to ultraviolet light, easy to be thermally oxidized, etc., to improve performance and use stability, and to achieve good melt fluidity. , The effect of the system reaction is uniform and stable

Active Publication Date: 2022-02-01
广东舜天新材料有限公司
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Problems solved by technology

[0004] The purpose of the present invention is to provide a dipolyamine-modified copolyamide and its preparation method, aiming at solving the problem of polyether amine copolymerization in the prior art in order to make the synthesized polyamide have low temperature resistance, but the polyether Amine contains an ether bond structure, which has the disadvantages of high water absorption, easy to be thermally oxidized, and not resistant to ultraviolet light, and it is difficult to obtain satisfactory comprehensive performance technical problems

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  • Dipolyamine-modified copolyamide and preparation method thereof
  • Dipolyamine-modified copolyamide and preparation method thereof
  • Dipolyamine-modified copolyamide and preparation method thereof

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[0042] The embodiment of the present invention also provides the preparation method of described dipolyamine modified copolyamide, comprising the following steps:

[0043] (1) Turn on the reactor to stir, and add the organic amine to the reactor;

[0044] (2) Add the organic acid to the completed system of step (1), and wait for the self-reaction heating temperature of the system to no longer rise;

[0045] (3) Turn on the reaction kettle to heat up, so that the system can complete the reaction at 140-260°C;

[0046] (4) When the reaction temperature is >180°C, control the pressure of the reactor at 1×10 2 ~1.013×10 5 Pa, after polycondensation until the required viscosity is reached, the material is discharged to obtain the copolyamide modified by dipolyamine.

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Abstract

The invention belongs to the technical field of polyamide, and particularly relates to dipolyamine-modified copolyamide and a preparation method thereof. The dipolyamine-modified copolyamide is prepared from organic acid and organic amine, wherein a molar ratio of the organic acid to the organic amine is 1: (0.95-2.65); the organic amine contains, in percentage by mass, 1-80% of dipolyamine, and the rest raw materials of the organic amine are any one or a composition of more than one selected from of binary aliphatic amine, polybasic aliphatic amine, alicyclic amine, polyether amine, aromatic diamine, lactam and alcohol amine compounds. The dipolyamine-modified copolyamide can enhance low temperature resistance, thermal oxidation resistance, hydrolysis resistance, salt fog resistance, chemical corrosion resistance and ultraviolet radiation resistance at the same time, and has excellent comprehensive performance.

Description

technical field [0001] The invention belongs to the technical field of polyamides, in particular to a dimeramine-modified copolyamide and a preparation method thereof. Background technique [0002] Polyamide, commonly known as nylon (Nylon), English name Polyamide (referred to as PA), is the general term for thermoplastic resins containing repeated amide groups—[NHCO]—on the main chain of the molecule, including aliphatic PA, aliphatic-aromatic PA and aromatic PA. . Among them, aliphatic PA has many varieties, large output and wide application, and its naming depends on the specific number of carbon atoms in the synthetic monomer. [0003] The copolyamide synthesized by the reaction of organic carboxylic acid with aliphatic amine and aromatic amine is usually very hard and brittle at room temperature; in order to make the synthesized polyamide have low temperature resistance, it is usually synthesized by adding polyether amine, but polyether amine contains ether bonds. str...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G69/40
CPCC08G69/40
Inventor 缪永建冷先勇冷秉东徐胜军冷先强
Owner 广东舜天新材料有限公司
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