CN110734663A

CN110734663A - Paint mist coagulant for water-based paint and preparation method thereof

Info

Publication number: CN110734663A
Application number: CN201911057243.8A
Authority: CN
Inventors: 桂成方; 桂林; 刘春花
Original assignee: Hunan Jinyu Environment Protection Technology Co Ltd
Current assignee: Hunan Jinyu Environment Protection Technology Co Ltd
Priority date: 2019-10-30
Filing date: 2019-10-30
Publication date: 2020-01-31

Abstract

The invention discloses paint mist coagulants for water-based paint, which are prepared from the following components, by weight, 2.0-7.5% of surface-modified nano clay, 10.0-13.5% of paraformaldehyde aqueous solution, 12.0-14.5% of polyacrylic acid aqueous solution, 1.8-2.8% of salicylamide and the balance of water.

Description

Paint mist coagulant for water-based paint and preparation method thereof

Technical Field

The invention belongs to the technical field of wastewater treatment, and particularly relates to paint mist coagulants for water-based paint and a preparation method thereof.

Background

Even though the water-based paint is hot, the traditional oil-based paint still firmly occupies a large amount of markets in the industrial field, particularly in the industrial coating field and severe corrosion and rust prevention, the water-based industrial paint gradually replaces the traditional oil-based corrosion and rust prevention paint but does not have sails in the process, the water-based paint wastewater treatment is more difficult to treat relative to the oil-based paint, the water-based paint molecules are difficult to separate from water, and the invention is about paint mist coagulator for the industrial coating water-based paint, the water quality becomes clear after the water mist coagulator is added into circulating water, and the paint residues are convenient to salvage.

Disclosure of Invention

In order to overcome the defects of the prior art, of the invention aims to provide paint mist coagulants for water-based paint, the water quality of the paint mist coagulants becomes clear after the paint mist coagulants are added into circulating water, and paint residues are convenient to salvage.

The second object of the present invention is to provide a method for preparing the above-mentioned paint mist coagulant for water-based paints.

The paint mist coagulant for the water-based paint is prepared from the following components in percentage by weight:

wherein the surface modified nanoclay is an octadecyl primary amine modified nanoclay, the octadecyl primary amine content is 25-30 wt%, and the preferred brand is: ALDRICH, original plant code: 682616.

The concentration of the paraformaldehyde aqueous solution is 10-20% (w/v aqueous solution) brand: ALFA original plant goods number: 043368 specification: alfa-043368, CAS number: 30525-89-4.

The polyacrylic acid has the number average molecular weight range of 1600-2200, has poor floating effect due to low molecular weight, is sticky due to high molecular weight, is inconvenient to salvage, and preferably has the Aldrich-535931 and the average molecular weight of 2000.

The weight percentage concentration of the polyacrylic acid aqueous solution is 50-55%.

Wherein the surface modified nano clay and paraformaldehyde destroy the molecular structure of the water paint to make the water paint lose viscosity; salicylamide captures aqueous paint molecules; polyacrylic acid can enable water paint molecules to float to the water surface.

The preparation method of the paint mist coagulant comprises the following steps:

weighing the components, blending, stirring and dissolving uniformly.

The application method of the paint mist coagulant for the water-based paint comprises the following steps: adding 400ml of clear water into a 500ml container, adding 4g of water-based paint, and shaking up; adding 0.4g of paint mist coagulant, shaking up and standing.

The beneficial effects of the paint mist coagulant are as follows: after sewage treatment, the transmittance is more than 20cm, the paint slag viscosity eliminating degree is 100%, and the floating rate is more than 98%.

Detailed Description

The invention is further illustrated by but is not intended to be limited by the following examples Table 1 is a formulation of examples 1-4 and comparative examples 1-2 in wt%.

Surface modified nanoclay brand: ALDRICH, original plant code: 682616; the concentration of paraformaldehyde (aqueous solution) is 16% (w/v aqueous solution); the concentration of the polyacrylic acid aqueous solution is 50 wt%.

Table 1 formulations of examples 1-4, comparative examples 1-2, wt%.

In table 1, the formulation of comparative example 1 was the same as that of example 4 except that the aqueous solution of polyacrylic acid was replaced with the aqueous solution of sodium polyacrylate of the corresponding polyacrylic acid; the formulation of comparative example 2 was prepared by increasing the amount of the aqueous polyacrylic acid solution to 24.5% and removing the aqueous paraformaldehyde solution, which was otherwise the same as in example 4.

500ml of clear water is taken, 5g of water-based paint is added, after uniform stirring, 0.5g of the paint mist coagulant in the examples 1 to 4 and the comparative examples 1 to 2 is added, the mixture is fully stirred for 1 minute, and standing and observation are carried out.

The formula of the water paint comprises the following components in percentage by weight:

huajinsi R418850.00%, Huajinsi HD 190215.00%, DPnB 3.00%, DPM 2.50%, PA 300.50%, BYK 0280.43%, BYK 3460.10%, TS-1002.60%, Glide 4400.26%, RM-20200.10%, RM-8W 0.10%, ethanol with concentration of 1395%, and balance pure water, wherein the Huajinsi R4188 is aqueous polyurethane dispersion, Huajinsi HD1902 is Huajinsi acrylate emulsion, DPnB is dipropylene glycol butyl ether, Dow's chemical, DPM is dipropylene glycol methyl ether, Dow's chemical, PA30 is dispersant, BYK028 defoamer, BYK346 wetting agent, TS-100 matting powder, digao, Glide 440, leveling agent RM-2020 is Roman Haas thickener, nonionic polyurethane, RM-8W Haas thickener, and nonionic polyurethane.

The test results were as follows:

TABLE 2

The perspective testing method comprises the following steps: the tank liquor is poured into a measuring cylinder with the depth of 20cm, and the bottom of the measuring cylinder can be seen clearly.

The method for testing the viscosity eliminating degree comprises the following steps: the hands are rubbed with the paint residues and washed with clear water to see whether the paint residues are adhered to the hands.

The floating rate: and (4) weighing.

Claims

1, kinds of paint mist coagulant for water paint, which is characterized in that the coagulant is prepared from the following components by weight percentage:

2. the paint mist coagulant for water-based paint according to claim 1 wherein the surface-modified nanoclay is a primary octadecylamine-modified nanoclay having a primary octadecylamine content of 25 to 30 wt.%.

3. The paint mist coagulant for water-based paint according to claim 1 wherein the concentration of the aqueous paraformaldehyde solution is 10 to 20%.

4. The paint mist coagulant for water-based paints according to claim 1, wherein the concentration of the aqueous polyacrylic acid solution is 50 to 55% by weight.

5. The paint mist coagulant for water-based paint according to claim 1 wherein the polyacrylic acid has a number average molecular weight in the range of 1600-2200.

6. The paint mist coagulant for water-based paint according to claim 1, characterized in that the preparation method is as follows: weighing the components, blending, stirring and dissolving uniformly.