阅读说明：本技术 一种油漆破粘剂及其制备方法 (Paint adhesion breaking agent and preparation method thereof ) 是由 吴昊天 刘晓峰 吴芝龙 于 2019-11-07 设计创作，主要内容包括：本发明公开了一种油漆破粘剂,包括以下重量份数的原料：三聚氰胺20-100份、甲醛溶液50-150份、氯化铵5-15份、盐酸20-80份、水665-905份；上述原料的制备方法为(1)根据上述原料的重量份数称取各原料,备用；(2)在反应釜中加原料水进行升温搅拌,升温至第一阶段加入三聚氰胺并持续搅拌；升温至第二阶段加入甲醛溶液和氯化铵,并保持恒温至透明,停止加热并加入盐酸,反应完毕得到油漆破粘剂,降温存放；本发明中的制备的破粘剂使用后,漆渣脱粘效果好,漆渣方便打捞、方便存放,漆渣不在喷房堆积,生产能够连续化。(The invention discloses a paint adhesion breaking agent which comprises the following raw materials in parts by weight: 20-100 parts of melamine, 50-150 parts of formaldehyde solution, 5-15 parts of ammonium chloride, 20-80 parts of hydrochloric acid and 905 parts of water 665-; the preparation method of the raw materials comprises (1) weighing the raw materials according to the weight parts of the raw materials for later use; (2) adding raw material water into a reaction kettle, heating and stirring, heating to a first stage, adding melamine, and continuously stirring; heating to the second stage, adding formaldehyde solution and ammonium chloride, keeping the constant temperature until the mixture is transparent, stopping heating, adding hydrochloric acid, reacting to obtain a paint viscosity breaking agent, and cooling and storing; after the prepared viscosity breaking agent is used, the paint slag de-bonding effect is good, the paint slag is convenient to salvage and store, the paint slag is not accumulated in a spraying room, and the production can be continuous.)

1. The paint adhesion breaking agent is characterized by comprising the following raw materials in parts by weight:

2. the paint viscosity breaking agent of claim 1, which is characterized by comprising the following raw materials in parts by weight:

3. the paint viscosity breaking agent of claim 1, which is characterized by comprising the following raw materials in parts by weight:

4. a preparation method of a paint adhesion breaking agent is characterized by comprising the following steps:

(1) weighing the raw materials according to the parts by weight of the paint viscosity breaking agent of any one of claims 1-3 for later use;

(2) adding raw material water into a reaction kettle, heating and stirring, heating to a first stage, adding melamine, and continuously stirring; and (3) heating to the second stage, adding the formaldehyde solution and the ammonium chloride, keeping the constant temperature until the mixture is transparent, stopping heating, adding hydrochloric acid, obtaining the paint viscosity breaking agent after the reaction is finished, and cooling and storing.

5. The method for preparing a paint viscosity breaking agent according to claim 4, wherein the temperature of the first stage in the step (2) is 35-80 ℃ and the time is 30-40 min; the temperature of the second stage is 40-80 ℃, and the time is 40-50 min.

6. The method for preparing the paint viscosity breaking agent according to the claim 4, characterized in that the constant temperature in the step (2) is 40-80 ℃, and the constant temperature time is 60-120 min.

7. The method for preparing a paint adhesion promoter as claimed in claim 4, wherein the reaction time of adding hydrochloric acid in step (2) is 120-300 min.

8. The method for preparing a paint viscosity breaking agent according to claim 4, wherein in the step (2), the stirring speed is 40-60 HZ/min.

Technical Field

The invention relates to the technical field of environmental pollution treatment, in particular to a paint viscosity breaking agent and a preparation method thereof.

Background

In the automobile, household appliance, furniture industry and some commodity manufacturing industry, paint spraying processes are available. A large amount of paint mist is generated in the spraying process, and 20-60% of the paint cannot be effectively utilized and is called over-spraying paint; the overspray mist which does not adhere to the surface of the object to be treated not only causes serious pollution but also wastes coating materials. In a spraying room, a circulating water-paint separation system is generally adopted, and in order to maintain the long-term safe operation of circulating water, over-sprayed paint must be separated from the circulating water. This requires that the paint mist be sufficiently debonded to facilitate separation; the paint visbreaking process is carried out in an aqueous phase, and usually requires adding a specific chemical (generally called paint viscosity breaking agent (paint remover), paint viscosity breaking agent or paint coagulant) into water, so that the paint carried in the water is sufficiently visbroken and smoothly separated from the water, and the paint is prevented from being adhered to the wall of a paint spraying chamber, the inner wall of a pipe pump, a fan impeller, the wall of a water tank and the like to cause blockage.

At present, paint is applied to a paint adhesion breaking agent in the market, paint can not be debonded after oil spraying, workers do not well salvage paint slag, and the salvaged paint slag has large viscosity and is sticky and polluted everywhere. A large amount of paint residues with viscosity are accumulated in the paint spray booth, and the paint spray booth needs to be cleaned once a week to meet production requirements. The paint circulating water tank needs to be cleaned once every half year. In addition, the common paint viscosity breaking agent in the prior art has the problems of insignificant debonding, poor flocculation effect, low slagging efficiency and slow paint slag removal, and the improvement of the debonding and flocculation effects and the slagging and paint slag removal efficiency is a problem to be solved urgently at present.

Therefore, the problem that needs to be solved by the technical personnel in the field is how to provide a paint adhesion breaking agent which has good debonding effect, is convenient for paint slag to be salvaged and is convenient for storage.

Disclosure of Invention

In view of the above, the invention provides the paint viscosity breaking agent which has good paint slag debonding effect, is convenient for paint slag salvaging and convenient for paint slag storage, and the preparation method thereof.

In order to achieve the purpose, the invention adopts the following technical scheme: the paint adhesive comprises the following raw materials in parts by weight: 20-100 parts of melamine, 50-150 parts of formaldehyde solution, 5-15 parts of ammonium chloride, 20-80 parts of hydrochloric acid and 905 parts of water 665-.

The invention has the beneficial effects that: the formaldehyde solution and the melamine are used as main materials, the linear high molecular polymer generated by the reaction of the melamine and the formaldehyde has strong electric neutrality, and the molecular chain of the linear high molecular polymer has cations with certain density, so that the electric neutralization function can be well exerted, and the colloid formed by paint particles is damaged to destabilize and agglomerate the paint particles; meanwhile, the linear molecular structure provides excellent adsorption bridging effect, so that unstable aggregates are flocculated into large and dense flocculants and water are separated.

Preferably, the feed comprises the following raw materials in parts by weight: 20-50 parts of melamine, 50-75 parts of formaldehyde solution, 5-8 parts of ammonium chloride, 20-45 parts of hydrochloric acid and 850 parts of water 830-.

Preferably, the feed comprises the following raw materials in parts by weight: 50 parts of melamine, 75 parts of formaldehyde solution, 8 parts of ammonium chloride, 45 parts of hydrochloric acid and 830 parts of water.

Preferably, the purity of melamine is > 99%, the purity of ammonium chloride is > 99%, the mass volume concentration of the formaldehyde solution is 35-38%, and the mass volume concentration of hydrochloric acid is 30-36%.

The invention also provides a preparation method of the paint adhesion breaking agent, which comprises the following steps:

(1) weighing the raw materials according to the parts by weight for later use;

(2) adding raw material water into a reaction kettle, heating and stirring, heating to a first stage, adding melamine, and continuously stirring; and (3) heating to the second stage, adding the formaldehyde solution and the ammonium chloride, keeping the constant temperature until the mixture is transparent, stopping heating, adding hydrochloric acid, obtaining the paint viscosity breaking agent after the reaction is finished, and cooling to 20-30 ℃ for storage.

The preparation method adopted in the invention is simple, is easy to operate and is more suitable for large-scale industrial production.

Preferably, the temperature of the first stage in the step (2) is 35-80 ℃ and the time is 30-40 min; the temperature of the second stage is 40-80 ℃, and the time is 40-50 min. More preferably, the reaction effect is most obvious when the temperature of the second stage is constant between 60 and 65 ℃.

Preferably, the constant temperature in the step (2) is 40-80 ℃, and the constant temperature time is 60-120 min.

More preferably, the temperature is kept at 60-65 ℃ for 180min, and the quality of the product is optimal after the reaction.

Preferably, the reaction time of the hydrochloric acid addition in the step (2) is 120-300 min.

Preferably, the pH of the resulting paint breaker is from 1.5 to 3.

In the step (2), the stirring speed is 40-60 HZ/min. The stirring speed in step (2) does not change.

When the paint viscosity breaking agent is used, the mass ratio of the paint viscosity breaking agent to the paint-containing wastewater can reach 1:3-1: 8.

According to the technical scheme, compared with the prior art, the invention discloses the paint viscosity breaking agent and the preparation method thereof, and the existing viscosity breaking agent is required to clean the paint spraying circulating water pool once every half year; after the viscosity breaking agent prepared from the raw materials is used, the paint slag is good in debonding effect, the paint slag is convenient to salvage and store, the paint slag is not accumulated in a spraying room, and the production can be continuous; the paint spraying circulating water tank is cleaned once every two years, and the frequency and time for cleaning the water tank are improved.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.