A kind of polymer long-acting defoamer and preparation method thereof

Abstract

The invention discloses a polymer long-acting defoamer and a preparation method thereof. The raw materials of the polymer long-acting defoamer of the present invention include polybutadiene double-sealed epoxy resin 94-97%, emulsifier 3-6%, and account for the polybutadiene double-sealed 0.05‑0.3% accelerator for the total weight of the epoxy resin and the emulsifier. The polymer long-acting defoaming agent of the invention has high molecular weight, is not easy to precipitate, has good compatibility with the solution system, can obviously reduce the surface tension of the solution system, and has long defoaming effect.

Description

technical field

[0001] The invention relates to the field of polymer materials, in particular to a polymer long-acting defoamer and a preparation method thereof. Background technique

[0002] Defoamer, also known as defoamer, is an indispensable additive in the production of modern chemical industry. It mainly reduces the surface tension, inhibits the generation of foam or eliminates the generated foam. In particular, it is used to eliminate harmful foam generated by surface active substances, stirring and other human or non-human factors in industrial production. In many industrial production processes (such as sewage treatment, printing and dyeing, fermentation, textile, food processing, oil exploration and refining, emulsion polymerization and natural gas desulfurization, etc.), the existence of a large number of foams often causes inconvenience in operation, reduction of equipment capacity and loss of raw materials. In severe cases, it may even lead to product quality p...

Examples

Embodiment 1

[0021] The first step is to prepare polybutadiene double-headed epoxy resin:

[0022] (1) At a reaction temperature of 40°C, add 24 g of polybutadiene with a number average molecular weight of 1000, 21 g of anhydrous formic acid and 40 g of toluene into a three-necked flask, and stir evenly;

[0023] (2) 15g of hydrogen peroxide is evenly added dropwise in the reaction flask, and the dropwise addition time is 0.5h, and it is incubated for 4h after the dropwise addition;

[0024] (3) The reaction solution in the above-mentioned step (2) was washed 3 times with deionized water, and the temperature was controlled to be 40° C. for vacuum distillation to obtain a polybutadiene double-capped epoxy resin.

[0025] The second step is to prepare the polymer long-acting defoamer:

[0026] (1) at room temperature, the 94g polybutadiene double-capped epoxy resin and 6g sodium p-aminobenzenesulfonate prepared in the first step are added in the reaction flask, and stirred;

[0027] (2) Ev...

Embodiment 2

[0030] The first step is to prepare polybutadiene double-headed epoxy resin:

[0031] (1) At a reaction temperature of 45°C, add 24 g of polybutadiene with a number average molecular weight of 1000, 21 g of anhydrous formic acid and 40 g of toluene into a three-necked flask, and stir evenly;

[0032] (2) 15g of hydrogen peroxide is evenly added dropwise in the reaction flask, the dropwise addition time is 1h, and it is incubated for 4h after the dropwise addition;

[0033] (3) The reaction solution in the above-mentioned step (2) was washed 3 times with deionized water, and the temperature was controlled to be 40° C. for vacuum distillation to obtain a polybutadiene double-capped epoxy resin.

[0034] The second step is to prepare the polymer long-acting defoamer:

[0035] (1) at room temperature, the 95g polybutadiene double-capped epoxy resin and 3g sodium p-aminobenzenesulfonate prepared in the first step are added in the reaction flask, and stirred;

[0036] (2) Evenly d...

Embodiment 3

[0039] The first step is to prepare polybutadiene double-headed epoxy resin:

[0040] (1) At a reaction temperature of 50°C, add 24 g of polybutadiene with a number average molecular weight of 1000, 21 g of anhydrous formic acid and 40 g of toluene into a three-necked flask, and stir evenly;

[0041] (2) 15g of hydrogen peroxide is evenly added dropwise in the reaction flask, the dropwise addition time is 0.8h, and it is incubated for 4h after the dropwise addition;

[0042] (3) The reaction solution in the above-mentioned step (2) was washed 3 times with deionized water, and the temperature was controlled to be 40° C. for vacuum distillation to obtain a polybutadiene double-capped epoxy resin.

[0043] The second step is to prepare the polymer long-acting defoamer:

[0044] (1) at room temperature, the 97g polybutadiene double-capped epoxy resin and 5g sodium p-aminobenzenesulfonate prepared in the first step are added in the reaction flask, and stirred;

[0045] (2) Evenly...

technical field

[0001] The invention relates to the field of polymer materials, in particular to a polymer long-acting defoamer and a preparation method thereof. Background technique

[0002] Defoamer, also known as defoamer, is an indispensable additive in the production of modern chemical industry. It mainly reduces the surface tension, inhibits the generation of foam or eliminates the generated foam. In particular, it is used to eliminate harmful foam generated by surface active substances, stirring and other human or non-human factors in industrial production. In many industrial production processes (such as sewage treatment, printing and dyeing, fermentation, textile, food processing, oil exploration and refining, emulsion polymerization and natural gas desulfurization, etc.), the existence of a large number of foams often causes inconvenience in operation, reduction of equipment capacity and loss of raw materials. In severe cases, it may even lead to product quality p...

Examples

Embodiment 1

[0021] The first step is to prepare polybutadiene double-headed epoxy resin:

[0022] (1) At a reaction temperature of 40°C, add 24 g of polybutadiene with a number average molecular weight of 1000, 21 g of anhydrous formic acid and 40 g of toluene into a three-necked flask, and stir evenly;

[0023] (2) 15g of hydrogen peroxide is evenly added dropwise in the reaction flask, and the dropwise addition time is 0.5h, and it is incubated for 4h after the dropwise addition;

[0024] (3) The reaction solution in the above-mentioned step (2) was washed 3 times with deionized water, and the temperature was controlled to be 40° C. for vacuum distillation to obtain a polybutadiene double-capped epoxy resin.

[0025] The second step is to prepare the polymer long-acting defoamer:

[0026] (1) at room temperature, the 94g polybutadiene double-capped epoxy resin and 6g sodium p-aminobenzenesulfonate prepared in the first step are added in the reaction flask, and stirred;

[0027] (2) Ev...

Embodiment 2

[0030] The first step is to prepare polybutadiene double-headed epoxy resin:

[0031] (1) At a reaction temperature of 45°C, add 24 g of polybutadiene with a number average molecular weight of 1000, 21 g of anhydrous formic acid and 40 g of toluene into a three-necked flask, and stir evenly;

[0032] (2) 15g of hydrogen peroxide is evenly added dropwise in the reaction flask, the dropwise addition time is 1h, and it is incubated for 4h after the dropwise addition;

[0033] (3) The reaction solution in the above-mentioned step (2) was washed 3 times with deionized water, and the temperature was controlled to be 40° C. for vacuum distillation to obtain a polybutadiene double-capped epoxy resin.

[0034] The second step is to prepare the polymer long-acting defoamer:

[0035] (1) at room temperature, the 95g polybutadiene double-capped epoxy resin and 3g sodium p-aminobenzenesulfonate prepared in the first step are added in the reaction flask, and stirred;

[0036] (2) Evenly d...

Embodiment 3

[0039] The first step is to prepare polybutadiene double-headed epoxy resin:

[0040] (1) At a reaction temperature of 50°C, add 24 g of polybutadiene with a number average molecular weight of 1000, 21 g of anhydrous formic acid and 40 g of toluene into a three-necked flask, and stir evenly;

[0041] (2) 15g of hydrogen peroxide is evenly added dropwise in the reaction flask, the dropwise addition time is 0.8h, and it is incubated for 4h after the dropwise addition;

[0042] (3) The reaction solution in the above-mentioned step (2) was washed 3 times with deionized water, and the temperature was controlled to be 40° C. for vacuum distillation to obtain a polybutadiene double-capped epoxy resin.

[0043] The second step is to prepare the polymer long-acting defoamer:

[0044] (1) at room temperature, the 97g polybutadiene double-capped epoxy resin and 5g sodium p-aminobenzenesulfonate prepared in the first step are added in the reaction flask, and stirred;

[0045] (2) Evenly...

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