Polymer containing diaminotriazine and preparation method thereof

A diaminotriazine, polymer technology, applied in chemical instruments and methods, water/sludge/sewage treatment, water/sewage treatment, etc., can solve problems such as poor compatibility and low conversion rate, and achieve compatibility Good, low toxicity, good migration resistance effect

Active Publication Date: 2018-06-15

湖南美莱珀科技发展有限公司 +1

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AI-Extracted Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the low conversion rate of the polymer containing diaminotriazine and the poor compatibility of the obtained pol...

Abstract

The invention relates to a polymer containing diaminotriazine and a preparation method thereof. A cyano-containing polymer and dicyandiamide are subjected to a catalytic reaction by chloride in a non-aqueous solvent to obtain the polymer containing diaminotriazine, wherein the cyano-containing polymer has the following structural formula defined in the specification, wherein in the formula, R1 andR2 are the same or different and are defined in the specification, and x, y, m, z, f and k are each an integer more than or equal to 0. The dicyandiamide has the following structural formula definedin the specification; the finally prepared polymer containing diaminotriazine has the following structural formula defined in the specification, wherein in the formula, p is an integer more than or equal to 10, q is an integer more than or equal to p, q+p=n, and R1 and R2 are the same as R1 and R2 in the cyano-containing polymer. The method is simple and the synthetic materials are easy to obtain.The finally prepared polymer containing diaminotriazine has the advantages of high thermal stability and good compatibility with the polymer, and is wide in application fields.

Application Domain

Water/sewage treatment

Technology Topic

SolventChemistry +6

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Examples

Experimental program(24)
Comparison scheme(2)

Example Embodiment

[0049] Example 1

[0050] A method for preparing diaminotriazine-containing polymers, the steps are as follows:

[0051] (1) After mixing polyacrylonitrile, dicyandiamide (the structural formula is shown in formula (II)), methanol and calcium chloride, first react at 60°C for 1 hour, then at 80°C for 2 hours, and finally at 100 After reacting at ℃ for 1 hour, the product a is obtained by cooling, wherein the mass ratio of polyacrylonitrile, dicyandiamide and methanol is 1:0.1:5, and the addition of calcium chloride is the addition of polyacrylonitrile in parts by weight. 0.5% of the amount; the structural formula of polyacrylonitrile is shown in formula (I), where R 1 And R 2 The same is shown in formula (b), where x is 0, and the average value of n in the molecular chain of polyacrylonitrile is 20;

[0052] (2) Wash product a with deionized water three times to obtain product b;

[0053] (3) Put the product b in a hydrochloric acid aqueous solution with a mass of 1% and a concentration of 1% by weight, and heat to reflux for 2 hours. After cooling, it is washed with deionized water twice, and after drying, it is placed with a mass of 1 times the mass and concentration. It is heated to reflux in a 1% sodium hydroxide aqueous solution for 2 hours, washed with deionized water twice after cooling, filtered to collect the filter cake and dried to obtain a polymer containing diaminotriazine;

[0054] (4) After mixing the polymer containing diaminotriazine and urea whose mass is one time, react at 100°C for 4 hours. After cooling, washing with water, separation and drying, a high-purity diamino-containing polymer with a purity of 85% is obtained. Triazine polymer.

[0055] The structural formula of the diaminotriazine-containing polymer is shown in formula (III), where R 1 And R 2 Same as R in polyacrylonitrile 1 And R 2 The temperature at which the polymer containing diaminotriazine loses 1% by weight is 280°C.

Example Embodiment

[0056] Example 2

[0057] A method for preparing diaminotriazine-containing polymers, the steps are as follows:

[0058] (1) After mixing polyacrylonitrile, dicyandiamide (the structural formula is shown in formula (II)), a mixture of methanol and ethanol (volume ratio 1:1) and magnesium chloride, first react at 62°C for 2 hours, and then Reacted at 82°C for 3 hours, and finally reacted at 105°C for 2 hours. After cooling, the product a was obtained. Among them, the mass ratio of polyacrylonitrile, dicyandiamide and the mixture of methanol and ethanol (volume ratio 1:1) was 1:0.2: 10. In parts by weight, the addition amount of magnesium chloride is 2% of the addition amount of polyacrylonitrile; the structural formula of polyacrylonitrile is the same as in Example 1, and the average value of n in the molecular chain of polyacrylonitrile is 35;

[0059] (2) Wash product a with deionized water 4 times to obtain product b;

[0060] (3) Place the product b in a hydrochloric acid aqueous solution with a mass of 2 times its mass and a concentration of 2wt% for 3 hours, and then wash it with deionized water 3 times after cooling, and place it in a mass concentration of 2 times its mass after drying. It is heated to reflux in a 3% sodium hydroxide aqueous solution for 3 hours, washed with deionized water 3 times after cooling, filtered to collect the filter cake and dried to obtain a polymer containing diaminotriazine;

[0061] (4) After mixing the diaminotriazine-containing polymer with twice the mass of urea, react at 125°C for 6 hours. After cooling, washing with water, separating and drying, a high-purity diamino-containing polymer with a purity of 86% is obtained. Triazine polymer.

[0062] The structural formula of the diaminotriazine-containing polymer is shown in formula (III), where R 1 And R 2 Same as R in polyacrylonitrile 1 And R 2 The temperature at which the polymer containing diaminotriazine loses 1% by weight is 282°C.

Example Embodiment

[0063] Example 3

[0064] A method for preparing diaminotriazine-containing polymers, the steps are as follows:

[0065] (1) After mixing polyacrylonitrile, dicyandiamide (the structural formula is as shown in formula (II)), the ionic liquid containing imidazolium salt ions and aluminum trichloride, first react at 65°C for 3 hours, and then at 85°C Reacted for 3 hours, and finally reacted at 106°C for 3 hours. After cooling, the product a was obtained, in which the mass ratio of polyacrylonitrile, dicyandiamide and ionic liquid containing imidazole salt ions was 1:0.4:30, calculated by weight , The added amount of aluminum trichloride is 5% of the added amount of polyacrylonitrile; the structural formula of polyacrylonitrile is the same as in Example 1, and the average value of n in the molecular chain of polyacrylonitrile is 50;

[0066] (2) Wash product a with deionized water 5 times to obtain product b;

[0067] (3) Place product b in a hydrochloric acid aqueous solution with a mass of 3 times its mass and a concentration of 3wt%, and heat to reflux for 4 hours. After cooling, it is washed with deionized water 4 times. After drying, it is placed at a mass of 3 times its mass with a mass concentration. It is heated to reflux in a 5% sodium hydroxide aqueous solution for 4 hours, washed with deionized water 4 times after cooling, filtered to collect the filter cake and dried to obtain a polymer containing diaminotriazine;

[0068] (4) After mixing the diaminotriazine-containing polymer with 3 times the mass of urea, react at 142°C for 8 hours. After cooling, washing, separation and drying, a high-purity diamino-containing polymer with a purity of 88% is obtained. Triazine polymer.

[0069] The structural formula of the diaminotriazine-containing polymer is shown in formula (III), where R 1 And R 2 Same as R in polyacrylonitrile 1 And R 2 The temperature at which the polymer containing diaminotriazine loses 1% by weight is 294°C.

PUM

Property	Measurement	Unit
Fineness	2.0	d
Breaking strength	2.8	g/dtex
Breaking strength	3.2	g/dtex

Description & Claims & Application Information

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Classification and recommendation of technical efficacy words

low toxicity
Improve thermal stability

Polymer containing diaminotriazine and preparation method thereof

A diaminotriazine, polymer technology, applied in chemical instruments and methods, water/sludge/sewage treatment, water/sewage treatment, etc., can solve problems such as poor compatibility and low conversion rate, and achieve compatibility Good, low toxicity, good migration resistance effect

AI-Extracted Technical Summary

Problems solved by technology

Abstract

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Examples

Example Embodiment

Example Embodiment

Example Embodiment

PUM

Description & Claims & Application Information

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