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Water-soluble polyamide resin and preparation method thereof

A technology for water-soluble polyamide and resin, which is applied in the field of water-soluble polyamide resin and its preparation, can solve the problems of environmental pollution, environmental pollution, and less addition, and achieve the effects of reducing production cost, expanding application scope and increasing solubility.

Inactive Publication Date: 2018-06-12
SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But no matter what kind of solvent, there are a lot of organic volatiles in the process of use, which will pollute the environment and endanger the health of construction workers and later users
Moreover, these organic solvents are difficult to recycle, and the cost is high. In addition, human beings pay more and more attention to the protection of the surrounding environment, and the use of such materials is even more restricted.
[0005] It has been reported that water-soluble polyamide resins will be prepared by solution polymerization of polymerized monomers with sulfonates, but this method needs to use a large amount of organic solvents such as N-methylpyrrolidone, pyridine, methanol and acetone, causing environmental pollution and Problems such as high production costs, and each polymerized monomer has a sulfonate group, which makes it impossible to flexibly adjust the water solubility of the product
It has also been reported that the monomer with a sulfonate is connected to the end of the polyamide molecular weight as an end-capping agent. This method can improve the mechanical properties of the product, but due to the small amount of addition of the end-capping agent sulfonate monomer, it is difficult for The water solubility of the product has not improved significantly, so it cannot be used as water-based ink and water-based paint

Method used

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  • Water-soluble polyamide resin and preparation method thereof
  • Water-soluble polyamide resin and preparation method thereof
  • Water-soluble polyamide resin and preparation method thereof

Examples

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preparation example Construction

[0054]

[0055] A kind of preparation method of water-soluble polyamide resin, it comprises the following steps:

[0056] (1), 0-60 parts of aliphatic dibasic acid, 10-60 parts of aliphatic dibasic amine, 0-70 parts of cyclic lactam, 10-50 parts of dibasic acid containing sulfonate group, 0.1 -0.4 parts of end-capping agent, 0.01-0.06 parts of catalyst and 20-160 parts of deionized water are added to the autoclave in sequence;

[0057] (2) Vacuumize the autoclave and fill it with nitrogen, then adjust the pressure to 30-50kPa higher than normal pressure;

[0058] (3) Heating the autoclave, raising the temperature to the first temperature, and then increasing the pressure to 0.1-0.2MPa, and then performing a constant temperature reaction for 1-3 hours;

[0059] (4), continue to heat up to the second temperature and increase the pressure to 0.5-3MPa, while keeping the pressure constant by releasing water vapor;

[0060] (5), then raise the temperature at a rate of 0.2-1.8°C / ...

Embodiment 1

[0076] The preparation method of the water-soluble polyamide resin of the present embodiment, it may further comprise the steps:

[0077] (1), 24 parts of adipic acid, 36 parts of hexamethylenediamine, 40 parts of isophthalic acid-5-sodium sulfonate, 0.2 part of acetic acid (as an end-capping agent), 0.03 parts of sodium hypophosphite (as a catalyst) and 100 parts of deionized water are sequentially added into the autoclave;

[0078] (2), vacuumize the autoclave, fill with nitrogen three times, replace the air in the autoclave, then feed nitrogen to adjust the pressure to 40kPa higher than normal pressure;

[0079] (3) Heat the high-pressure reactor so that the reaction is always carried out under the protection of an inert gas. After the temperature is raised to the first temperature of 100° C., the pressure is raised to 0.12 MPa, and then the constant temperature reaction is carried out for 1.5 hours;

[0080] (4), continue to heat up to the second temperature of 220 ° C, a...

Embodiment 2

[0092] The preparation method of the water-soluble polyamide resin of the present embodiment, it may further comprise the steps:

[0093] (1), with 11 parts of hexamethylenediamine, 64 parts of caprolactam, 25 parts of isophthalic acid-5-sodium sulfonate, 0.1 part of benzoic acid (as an end-capping agent), 0.01 part of magnesium phosphite (as a catalyst) and 20 Parts of deionized water are added into the autoclave successively;

[0094] (2), vacuumize the autoclave, fill with nitrogen three times, replace the air in the autoclave, then feed nitrogen to adjust the pressure to 30kPa higher than normal pressure;

[0095] (3) Heat the high-pressure reactor so that the reaction is always carried out under the protection of an inert gas. After the temperature is raised to the first temperature of 80° C., the pressure is then raised to 0.1 MPa, and the constant temperature reaction is carried out for 3 hours;

[0096] (4), continue to heat up to the second temperature of 240 ° C, ad...

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Abstract

The invention provides water-soluble polyamide resin and a preparation method thereof. The water-soluble polyamide resin comprises the following production raw materials: 0-60 parts of an aliphatic dibasic acid, 10-60 parts of an aliphatic diamine, 0-70 parts of cyclic lactam, 10-50 parts of a sulfonate group-containing dibasic acid, 0.1-0.4 part of an end-capping agent, 0.01-0.06 part of a catalyst and 20-160 parts of deionized water. According to the method provided by the invention, the prepared product has very good water solubility, can be used in the fields of water-based inks, water-based paints and the like, and satisfy a plurality of application fields with strict requirements for environmental protection, thereby expanding the application range of original materials; and in addition, in the preparation process, use of a large amount of organic solvents is avoided, and therefore the environment is protected.

Description

technical field [0001] The invention belongs to the technical field of polymer material synthesis, and in particular relates to a water-soluble polyamide resin and a preparation method thereof. Background technique [0002] Polyamide (commonly known as nylon) refers to a high molecular polymer with amide group (‐CONH‐) repeating structural units on the molecular chain, due to its excellent comprehensive properties such as high strength, wear resistance, self-lubrication, oil resistance and chemical corrosion resistance , and a better performance-price ratio, since it came out in 1939, it has been more and more widely used. Various nylons such as PA6, PA66, PA11, PA12, PA610, PA612 and MXD6 have come out one after another, and now the annual output exceeds 130×10 4 t, occupies an important position in engineering plastics, thus becoming the engineering plastic with the largest amount and the widest application range. [0003] The molecular structure of all polyamide resins ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G69/42
CPCC08G69/42
Inventor 杨桂生赵冬云严莉莉
Owner SHANGHAI GENIUS ADVANCED MATERIAL (GRP) CO LTD