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Water-soluble copolyamide and preparation method thereof

A copolyamide, water-soluble technology, applied in the field of polymer material synthesis, to achieve the effect of improving water solubility, high environmental protection characteristics, and increasing biomass conversion rate

Inactive Publication Date: 2013-04-24
苏州瀚海化学有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the main raw materials of the water-soluble copolyamide prepared by the prior art are all from petrochemical raw materials, and 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 to replace petrochemical raw materials in whole or in part. Has become an important development trend in the field of polymer materials

Method used

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  • Water-soluble copolyamide and preparation method thereof

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Effect test

Embodiment 1

[0024] The preparation of embodiment 1 water-soluble copolyamide

[0025] Concretely prepare according to the following steps:

[0026] The reaction raw materials are fed according to the following molar ratio: 25% adipic acid, 25% furandicarboxylic acid, 50% polyether diamine (x=2), add a small amount of water as an initiator, and heat up to 140~160°C in an inert atmosphere. After keeping for 1-2 hours, the temperature rises to 180-220°C, and after keeping for 1-2 hours, the temperature rises to 230-250°C. Inert gas, water-soluble copolyamide can be obtained after the melt is cooled. The intrinsic viscosity of the product measured at 30°C with sulfuric acid as a solvent is 0.46;

Embodiment 2

[0027] The preparation of embodiment 2 water-soluble copolyamides

[0028] Concretely prepare according to the following steps:

[0029] The reaction raw materials are fed according to the following molar ratio: 25% adipic acid, 12.5% ​​sebacic acid, 12.5% ​​furandicarboxylic acid, 37.5% polyether diamine (x=2), 12.5% ​​decane diamine, add a small amount of water as an initiator , raise the temperature to 140~160°C in an inert atmosphere, keep it for 1~2 hours, then raise it to 180~220°C, keep it for another 1~2 hours, then raise it to 230~250°C, keep it for 0.5~1 hour Then start to depressurize, fill in inert gas after 0.5~1 hour, and get the water-soluble copolyamide product after the melt is cooled. The intrinsic viscosity of the product measured at 30°C with sulfuric acid as a solvent is 0.42;

Embodiment 3

[0030] The preparation of embodiment 3 water-soluble copolyamides

[0031] Concretely prepare according to the following steps:

[0032] The reaction raw materials are fed according to the following molar ratio: 30% adipic acid, 5% sebacic acid, 10% furandicarboxylic acid, 40% polyether diamine (x=2), 5% decanediamine, 10% undecyl lactam , add a small amount of water as an initiator, raise the temperature to 140~160°C in an inert atmosphere, keep it for 1~2 hours, then raise the temperature to 180~220°C, keep it for another 1~2 hours, then raise the temperature to 230~250°C After keeping it for 0.5~1 hour, start to reduce the pressure, fill it with inert gas after 0.5~1 hour, and get the water-soluble copolyamide product after the melt is cooled. The intrinsic viscosity of the product measured at 30°C with sulfuric acid as a solvent is 0.42;

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Abstract

The invention discloses a water-soluble copolyamide and a preparation method thereof. The water-soluble copolyamide is characterized by being prepared by feeding dicarboxylic acid, 2,5-furan diformic acid and polyether diamine as reaction raw materials, and carrying out a melt polycondensation reaction, wherein the reaction raw materials participate in the reaction at an equivalence ratio of 1: 1 according to carboxyl and amino; and the water-soluble copolyamide contains a furan diformic acid structural unit which accounts for 1-50mol% based on the total equivalence weight of the acid. The prepared water-soluble copolyamide introduces the biomass-based 2,5-furan diformic acid into a copolyamide polymer, so that the biomass conversion rate of the raw material is improved, and the water-soluble copolyamide has a better dispersing performance in the water solution.

Description

technical field [0001] The invention belongs to the field of polymer material synthesis, in particular to a water-soluble copolyamide mainly made of biomass raw materials. Background technique [0002] Homopolymerized polyamide resins are refractory and insoluble due to a large number of hydrogen bonds and high crystallinity. This property can usually be improved by introducing some special functional groups and breaking the regularity of molecular chains by means of copolymerization. For example, the copolyamides disclosed in US Pat. No. 4,895,660 and Japanese Patent No. 56-93704 obtain water solubility through sulfonation; US Pat. No. 4,323,639 and US Pat. Chinese patent CN200910032093.5 discloses an anionic copolyamide, which obtains water solubility by introducing a large number of carboxyl groups into the molecular chain and neutralizing with alkaline substances to form a salt. [0003] However, the main raw materials of the water-soluble copolyamide prepared by the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
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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