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Alcohol-soluble copolyamide and preparation method thereof

A copolyamide, alcohol-soluble technology, applied in the field of polymer material synthesis, can solve problems such as emissions, and achieve the effects of lowering melting point, simple preparation method and improving biomass conversion rate

Inactive Publication Date: 2013-05-22
苏州瀚海化学有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the main raw materials of the alcohol-soluble copolyamide prepared by the existing technology are all from petrochemical raw materials, and the production process will generate a large amount of carbon emissions. With the increasing depletion of petroleum resources and the continuous improvement of people's environmental awareness, it is necessary to look for raw materials based on renewable biomass resources. It has become an important development trend in the field of polymer materials to replace all or part of petrochemical raw materials

Method used

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  • Alcohol-soluble copolyamide and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The preparation of embodiment 1 alcohol-soluble copolyamide

[0024] Prepare as follows:

[0025] The reaction raw materials are fed in the following molar ratio: 20% adipic acid, 10% sebacic acid, 20% furandicarboxylic acid, 20% hexamethylenediamine and 30% decanediamine. Pressure to 1Mpa, heat preservation and pressure for 1 hour, then gradually increase the temperature to 250°C, after 1.5 hours of heat preservation and pressure, start to reduce the pressure and drain water, reduce the pressure to normal pressure within 1 hour, maintain it for 0.5 hours, and then depressurize for 0.5 hours. Then fill in an inert gas to 0.5Mpa, extrude and cool the melt to obtain an alcohol-soluble copolyamide product.

[0026] The product is analyzed by DSC, and the measured melting point (Tm) is 138-146 ° C; at 25 ° C, using sulfuric acid as a solvent, the measured relative viscosity is 1.8;

Embodiment 2

[0027] The preparation of embodiment 2 alcohol-soluble copolyamide

[0028] Prepare as follows:

[0029] The reaction raw materials are fed in the following molar ratio: 10% adipic acid, 15% sebacic acid, 25% furandicarboxylic acid, 25% hexamethylenediamine and 25% decanediamine. Pressure to 1Mpa, heat preservation and pressure for 1 hour, then gradually increase the temperature to 250°C, after 1.5 hours of heat preservation and pressure, start to reduce the pressure and drain water, reduce the pressure to normal pressure within 1 hour, maintain it for 0.5 hours, and then depressurize for 0.5 hours. Then fill in an inert gas to 0.5Mpa, extrude and cool the melt to obtain an alcohol-soluble copolyamide product.

[0030] The product is analyzed by DSC, and the measured melting point (Tm) is 142-147°C; at 25°C, using sulfuric acid as a solvent, the measured relative viscosity is 2.1;

Embodiment 3

[0031] The preparation of embodiment 3 alcohol-soluble copolyamide

[0032] Prepare as follows:

[0033] The reaction raw materials are fed according to the following molar ratio: 10% adipic acid, 10% sebacic acid, 20% furandicarboxylic acid, 20% caprolactam, 10% hexamethylenediamine and 30% decanediamine. Under the nitrogen system, the temperature is raised to 180 ℃, and pressurize to 1Mpa at the same time, after 1.5 hours of heat preservation and pressure, gradually increase the temperature to 250°C, after 1.5 hours of heat preservation and pressure, start to reduce the pressure and drain, reduce the pressure to normal pressure within 1 hour, maintain 0.5 hours and then depressurize 0.5 Hour. Then fill in an inert gas to 0.5Mpa, extrude and cool the melt to obtain an alcohol-soluble copolyamide product.

[0034] The product is analyzed by DSC, and the measured melting point (Tm) is 123-130°C; at 25°C, using sulfuric acid as a solvent, the measured relative viscosity is 2.2...

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Abstract

The invention discloses alcohol-soluble copolyamide and a preparation method thereof. The alcohol-soluble copolyamide is characterized by being prepared by charging dicarboxylic acid, diamine, lactam and furan-2,5-dicarboxyic acid wchi are used as raw materials and carrying out fusion polycondensation to obtain the alcohol-soluble copolyamide, wherein the raw materials react in equivalent ratio of carboxyl to amino of 1:1. The novel alcohol-soluble copolyamide obtained by adopting the preparation method contains more than 60wt% of biomass-based raw material, has excellent alcohol solubility and can be applied to the fields of paints and binding agents.

Description

technical field [0001] The invention belongs to the field of polymer material synthesis, in particular to an alcohol-soluble copolyamide mainly made of biomass raw materials. Background technique [0002] Dibasic acids and diamines (or lactams) undergo dehydration polycondensation to form polyamide resins, and copolyamide resins can be synthesized from various diamines and various diamines (or lactams). Copolyamide resins exhibit different properties according to the types and proportions of their monomers, and can be used in printing inks, coatings, adhesives and other fields. [0003] The low melting point and alcohol solubility of polyamide are generally obtained by destroying the regularity of polymer molecules through ternary or quaternary copolymerization. For example, US Pat. C. It is partially soluble in hot alcohol-water mixtures. Japanese Patent No. 50-35291 discloses a series of aliphatic quaternary copolyamides with lower melting point and better alcohol solubil...

Claims

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Application Information

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IPC IPC(8): C08G69/40
Inventor 宁珅叶同奇方筱
Owner 苏州瀚海化学有限公司
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