CN108610885A - A kind of nanometer water silicon solution modification water-base epoxy two-component zinc-rich paint and preparation method thereof - Google Patents

Abstract

The present invention relates to medical detection fields more particularly to a kind of nanometer water silicon solution modification water-base epoxy two-component zinc-rich paint and preparation method thereof, and host agent each component weight proportion is：13 15% aqueous epoxy resins and 3 7% aqueous, environmental protective solvent；The auxiliary agent：0.2 1% antifoaming agent, 0.5 1.5% dispersant, 60 65% zinc powder, 0.3 1% anti-settling auxiliary agent；Curing agent component is 30 35% aqueous epoxy curing agent, 65 70% nanometer water silicon solution, is matched as host agent：Curing agent is 5.25:1.Nanometer water silicon solution modification water-base epoxy two-component zinc-rich paint of the present invention and preparation method thereof, cathodic protection efficiency and water resistance for improving market circulation water-thinned epoxy zinc-rich product, to which the antiseptic property of coating be greatly improved.

Description

Nano aqueous silicon solution modified aqueous epoxy two-component zinc-rich coating and preparation method thereof

Technical Field

The invention relates to the field of metal paint corrosion prevention, in particular to a nano aqueous silicon solution modified aqueous epoxy two-component zinc-rich coating and a preparation method thereof.

Background

At present, most of water-based two-component epoxy zinc-rich products in China generally have the defects of insufficient water resistance and inferior salt spray effect to solvent-based products. The reason is that the waterborne epoxy resin used by the waterborne two-component is the modified epoxy resin with the polyether modified chain segment, although the epoxy resin is waterborne by the modification, the waterborne epoxy two-component zinc-rich coating product can be prepared, the water resistance of the coating film can be greatly reduced by the polyether modified chain segment, and particularly in a high-temperature high-humidity environment which is just an environment possessed by a salt spray test of the waterborne epoxy zinc-rich coating product, so that the waterborne two-component epoxy zinc-rich product loses the adhesive force in the salt spray test, and the same phenomenon can occur in the process of testing the waterborne cold and hot circulation. This is a major problem for such products and has not been improved for many years.

Because the water resistance is poor, the addition amount of the resin of the water-based two-component epoxy zinc-rich product is often more than that of a solvent-based product, so that the contact probability of zinc powder of a paint film is reduced, and the anode sacrificial function of the zinc powder is poor.

In view of the above-mentioned drawbacks, the present inventors have finally obtained the present creation through a long period of research and practice.

Disclosure of Invention

The invention aims to provide a nano aqueous silicon solution modified aqueous epoxy two-component zinc-rich coating and a preparation method thereof, which are used for overcoming the technical defects.

In order to achieve the purpose, the invention adopts the following technical scheme: a nano water-based silicon solution modified water-based epoxy double-component zinc-rich coating,

13-15% of waterborne epoxy resin and 3-7% of waterborne environment-friendly solvent; the auxiliary agent is as follows: 0.2 to 1 percent of defoaming agent, 0.5 to 1.5 percent of dispersant, 60 to 65 percent of zinc powder and 0.3 to 1 percent of anti-settling auxiliary agent. The curing agent component is 30-35% of water-based epoxy curing agent and 65-70% of nano water-based silicon solution, and the mixture ratio is as follows: the curing agent is 5.25:1

Further, the nano water-based silicon solution modified water-based epoxy two-component zinc-rich coating comprises the following main components in parts by weight: 13% of waterborne epoxy resin and 6% of waterborne environment-friendly solvent; the auxiliary agent is as follows: 0.2 percent of defoaming agent, 1.5 percent of dispersing agent, 62.3 percent of zinc powder and 1 percent of anti-settling auxiliary agent. The curing agent component is 33.3 percent of water-based epoxy curing agent 66.7 percent of nano water-based silicon solution, and the mixture ratio is as follows: the curing agent was 5.25:1.

Further, the waterborne epoxy resin is a waterborne epoxy resin EP20 produced by Anbang company.

Further, the aqueous environment-friendly solvent is one or more of propylene glycol methyl ether acetate, propylene glycol butyl ether and dipropylene glycol methyl ether produced by Jiangsu Valencon.

Further, the defoaming agent is a non-silicon water-oil dual-purpose non-water defoaming agent BYK-011.

Further, the dispersant is a water-free and non-alkaline polyurethane dispersant BYK-192.

Furthermore, the zinc powder is 100% of zinc powder with 500 meshes in solid content.

Further, the anti-settling auxiliary agent is wax powder Kelain 9615 which does not contain water and is easy to disperse in alcohol ether solvent and has good anti-settling effect on zinc powder

Further, the waterborne epoxy curing agent is a Zhanxin 613 waterborne epoxy curing agent

Further, the nano aqueous silicon solution is produced by Anhui macroyang nano silicon materials.

The invention also provides a preparation method of the nano water-based silicon solution modified water-based epoxy two-component zinc-rich coating, which comprises the following steps: step a, sequentially adding the water-based epoxy resin, the water-based environment-friendly solvent, the defoaming agent, the dispersing agent and the zinc powder into a stirring preparation pot according to the raw material ratio;

and b, adding wax powder when the temperature of the stirring pot rises to a certain temperature.

C, dispersing the uniform paint paste until the fineness is less than or equal to 40 micrometers;

and d, adding the nano water-based silicon solution into a stirring pot, and adding the water-based epoxy curing agent under the stirring condition.

In the step a, stirring the mixture in a preparation pot for 5 minutes at the speed of 600 min/rotation;

in the step b, the wax powder can be added only when the temperature of the stirring pot reaches more than 40 ℃.

In the above step d, the stock preparation pot was stirred at a speed of 600 min/rev.

Compared with the prior art, the nano water-based silicon solution modified water-based epoxy two-component zinc-rich coating and the preparation method thereof have the advantages that a nano water-based silicon solution product which can obviously improve the water resistance of a system and has certain conductive capability is added, the nano water-based silicon solution product can be well mixed with a curing agent due to the neutral pH value, and after a main agent and the curing agent are mixed, nano silica gel particles in the nano water-based silicon solution can be released along with the volatilization of a solvent, are extremely small, can be filled in epoxy resin molecular gaps, are insoluble in water, and can play a good role in preventing moisture penetration.

The zinc salt is insoluble in water, so that the part of the paint film which is not completely blocked from water penetration can be quickly blocked, and the salt spray performance is further improved. Due to the existence of the nano aqueous silicon solution, the zinc powder of the whole paint film can protect any part penetrated by the corrosive medium to the maximum extent. The utilization rate of the zinc powder is improved, so that the use amount of partial zinc powder can be reduced, and the cost of the zinc-rich coating is reduced.

Detailed Description

The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments.

The invention provides a nano aqueous silicon solution modified aqueous epoxy two-component zinc-rich coating which comprises the following components in parts by weight: 13-15% of waterborne epoxy resin and 3-7% of waterborne environment-friendly solvent; the auxiliary agent is as follows: 0.2 to 1 percent of defoaming agent, 0.5 to 1.5 percent of dispersant, 60 to 65 percent of zinc powder and 0.3 to 1 percent of anti-settling auxiliary agent.

The curing agent component is 30-35% of water-based epoxy curing agent and 65-70% of nano water-based silicon solution, and the mixture ratio is as follows: the curing agent is 5.25:1

Further, the nano water-based silicon solution modified water-based epoxy two-component zinc-rich coating comprises the following main components in parts by weight: 13% of waterborne epoxy resin and 6% of waterborne environment-friendly solvent; the auxiliary agent is as follows: 0.2 percent of defoaming agent, 1.5 percent of dispersing agent, 62.3 percent of zinc powder and 1 percent of anti-settling auxiliary agent. The curing agent component is 33.3 percent of water-based epoxy curing agent 66.7 percent of nano water-based silicon solution, and the mixture ratio is as follows: the curing agent was 5.25:1.

Wherein,

the waterborne epoxy resin is a waterborne epoxy resin EP20 produced by Anbang company.

The aqueous environment-friendly solvent is one or more of propylene glycol methyl ether acetate, propylene glycol butyl ether and dipropylene glycol methyl ether produced by Jiangsu Valencon.

The defoaming agent is a non-silicon water-oil dual-purpose non-water defoaming agent BYK-011.

The dispersant is a water-free non-alkaline polyurethane dispersant BYK-192.

The zinc powder is 100 percent of zinc powder with 500 meshes.

The anti-settling auxiliary agent is wax powder Kelain 9615 which does not contain water and is easy to disperse in an alcohol ether solvent and has a good anti-settling effect on zinc powder.

The waterborne epoxy curing agent is a Zhanxin 613 waterborne epoxy curing agent

The nano water-based silicon solution is produced by Anhui macroyang nano silicon materials.

The specific manufacturing process comprises the following steps:

step a, sequentially adding the water-based epoxy resin, the water-based environment-friendly solvent, the defoaming agent, the dispersing agent and the zinc powder into a stirring preparation pot according to the raw material ratio; stirring in a stock preparation pot at a speed of 600 min/rotation for 5 minutes;

and b, adding wax powder when the temperature of the stirring pot rises to a certain temperature. The wax powder can be added only when the temperature of the stirring pot reaches above 40 ℃.

C, dispersing the uniform paint paste until the fineness is less than or equal to 40 micrometers;

d, adding the nano water-based silicon solution into a stirring pot, and adding a water-based epoxy curing agent under the stirring condition; the stock preparation pot was stirred at 600 min/rev.

The invention adopts 1000g of nano water-based silicon solution modified water-based epoxy two-component zinc-rich coating and 1000g of nano water-based silicon solution-free modified water-based epoxy two-component zinc-rich coating, and the nano water-based silicon solution modified water-based epoxy two-component zinc-rich coating comprises the following main components in parts by weight: 130 of an aqueous epoxy resin and 60 of an aqueous environmentally friendly solvent; the auxiliary agent is as follows: 2, 15 of a dispersant, 623 of zinc powder and 10 of an anti-settling auxiliary agent. The curing agent component is 333 aqueous epoxy curing agent 667 nanometer aqueous silicon solution, the proportion is the main agent: the curing agent was 5.25:1.

The properties of the two products are compared in the following table:

and (3) conventional construction test: the construction temperature is 80 ℃, the relative humidity is 50%, and the experimental results are shown in the following table

TABLE 1 comparison of two product Properties (1)

Coating method	Results of the experiment	Evaluation of
			Brushing	The leveling speed is high, the surface drying is fast, and the wetting capacity is good.	Both are substantially identical
Spraying of paint	High spraying efficiency and good sagging	Both are substantially identical
			Storage of	No obvious agglomeration after half a month of heat storage, and can be uniformly stirred	Both are substantially identical

TABLE 2 two kinds of product Properties comparison table (2)

Test items	Aqueous oxygenZinc-rich priming paint	Solvent-based primer
			Impact resistance	50kg	50kg
Adhesion force	Level 0	Level 1
			Salt fog (h)	1000	600
Water resistance	Is very good	Is excellent in
			Alcohol resistance	Is very good	Is excellent in
Temperature resistance	Is very good	Good effect
			Scratch resistance	Is very good	Is excellent in
Defoaming	Good effect	Good effect
			Leveling property	Good effect	Good effect
Dispersibility	Good effect	Good effect
			Sinking resistance	Good effect	Good effect
Shelf life	12	12

Although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (10)

1. A nano water-based silicon solution modified water-based epoxy double-component zinc-rich coating is characterized by comprising the following components: 13-15% of waterborne epoxy resin and 3-7% of waterborne environment-friendly solvent; the auxiliary agent is as follows: 0.2-1% of defoaming agent, 0.5-1.5% of dispersing agent, 60-65% of zinc powder and 0.3-1% of anti-settling auxiliary agent;

the curing agent component is 30-35% of water-based epoxy curing agent and 65-70% of nano water-based silicon solution, and the mixture ratio is as follows: the curing agent was 5.25:1.

2. The nano aqueous silicon solution modified aqueous epoxy two-component zinc-rich coating as claimed in claim 1, wherein the aqueous epoxy resin is the aqueous epoxy resin EP20 produced by Anbang corporation.

3. The nano aqueous silicon solution modified aqueous epoxy two-component zinc-rich coating as claimed in claim 1, wherein the aqueous environment-friendly solvent is one or more of propylene glycol methyl ether acetate, propylene glycol butyl ether and dipropylene glycol methyl ether produced by Jiangsu Valon.

4. The nano aqueous silicon solution modified aqueous epoxy two-component zinc-rich coating as claimed in claim 1, wherein the defoaming agent is non-silicon water-oil dual-purpose non-aqueous defoaming agent BYK-011.

5. The nano aqueous silicon solution modified aqueous epoxy two-component zinc-rich coating as claimed in claim 1, wherein the dispersant is a water-free non-alkaline polyurethane dispersant BYK-192.

6. The nano aqueous silicon solution modified aqueous epoxy two-component zinc-rich coating as claimed in claim 1, wherein the zinc powder is 100% zinc powder with a particle size of 500 meshes.

7. The nano aqueous silicon solution modified aqueous epoxy two-component zinc-rich coating as claimed in claim 1, wherein the anti-settling auxiliary agent is a wax powder Kelain 9615 which contains no water and is easily dispersed in alcohol ether solvent and has good anti-settling effect on zinc powder.

8. The nano-waterborne silicon solution modified waterborne epoxy two-component zinc-rich coating according to claim 1, wherein the waterborne epoxy curing agent is a Zhan-brand 613 waterborne epoxy curing agent.

9. The nano aqueous silicon solution modified aqueous epoxy two-component zinc-rich coating as claimed in claim 1, wherein the nano aqueous silicon solution is a nano aqueous silicon solution produced from Anhui macroyang nano silicon material.

10. A method for preparing a nano water-based silicon solution modified water-based epoxy two-component zinc-rich coating, which is characterized in that,

step a, sequentially adding the water-based epoxy resin, the water-based environment-friendly solvent, the defoaming agent, the dispersing agent and the zinc powder into a stirring preparation pot according to the raw material ratio; stirring in a stock preparation pot at a speed of 600 min/rotation for 5 minutes;

b, adding wax powder when the temperature of the stirring pot rises to a certain temperature;

the wax powder can be added only when the temperature of the stirring pot reaches more than 40 ℃;

c, dispersing the uniform paint paste until the fineness is less than or equal to 40 micrometers;

d, adding the nano water-based silicon solution into a stirring pot, and adding a water-based epoxy curing agent under the stirring condition; the stock preparation pot was stirred at 600 min/rev.