CN104356851A - Anticorrosive nanocoating - Google Patents

Abstract

The invention provides an anticorrosive nanocoating. For the shortcomings of high organic solvent content, poor weather resistance, easy pollution and the like of an anticorrosive epoxy resin coating, nano SiO2 is added into the coating, so that the mechanical property of the coating is improved and 99% of ultraviolet rays can be shielded. The coating comprises the following raw materials in parts by weight: 80-100 parts of waterborne epoxy resin emulsion, 10-15 parts of nano SiO2 powder, 1-2 parts of a surfactant, 0.8-1.5 parts of a dispersant, 1-1.6 parts of a defoamer and 30-40 parts of de-ionized water. As nano SiO2 is added into the prepared waterborne epoxy resin coating, the dryness and compactness of a coating film are improved, the deficiencies of easy cracking and blistering of the waterborne epoxy resin coating film are overcome, the adhesion and stability of the coating are enhanced, and finally the anticorrosive effect of the coating film is enhanced; the adopted nano SiO2 powder mainly has the following technical performances: the particle size is 5-15 nm and the density is less than 0.15 g/cm<3>.

Description

A kind of nano anticorrosive coating

Technical field

The present invention relates to a kind of coating, particularly relate to a kind of nano anticorrosive coating.

Background technology

The use of metallic substance is more and more extensive, the etching problem of metal and component thereof throughout and national economy

Every field, cause massive losses to human society.In order to reduce the loss of corrosion, people take a lot of safeguard procedures, but sfgd. common, the most economic, practical up to now or coating protection.

Along with the continuous progress of nanometer material science, the excellent specific property of nano composite dope causes the attention of people day by day.The nanometer size effect had according to nanoparticle and huge specific surface area characteristic, be dispersed in nanoparticle in traditional protective system and make nano composite dope, greatly can improve the excellent properties of protective system.Because nano silicon has special shielding ultraviolet rays performance, apply it to coating and make it in coating, keep nanoscale regime, the shortcomings such as poor, the easy pollution of existing coating weathering resistance can be improved.As added nanosized SiO_2 in acrylic coating, while both having made coating machine improved performance, maskable 99% ultraviolet again.

Summary of the invention

The object of the invention is to solve existing metal anti-corrosive paint organic solvent high, the technical problem that preservative effect is not good, provides a kind of nano anticorrosive coating.

To achieve these goals, the present invention is by the following technical solutions:

1. a nano anticorrosive coating, the raw material comprising following weight:

Water-soluble epoxy resin emulsion 80 ~ 100, Nanometer SiO2 powder 10 ~ 15, tensio-active agent 1 ~ 2, dispersion agent 0.8 ~ 1.5, defoamer 1 ~ 1.6, deionized water 30 ~ 40.

2, the preparation method of coating of the present invention comprises the following steps:

1) nano-size SiO2 slurry is prepared: take raw material according to aforementioned proportion: deionized water 30 ~ 40, Nanometer SiO2 powder 10 ~ 15, tensio-active agent 1 ~ 2, dispersion agent 0.8 ~ 1.5, add in preparing tank, with 1500r/min high speed dispersion 60 minutes, complete hydrolysis, polycondensation; Add defoamer 1 ~ 1.6, prepare nano-size SiO2 slurry through mechanically mixing, dispersion.

2) will prepare nano-size SiO2 slurry adds in water-soluble epoxy resin emulsion 80 ~ 100, ultrasonic disperse, and finally filtration, froth breaking, packaging obtain coating finished product.

3, effect of the present invention:

The water-soluble epoxy resin coating be prepared into, owing to adding nanosized SiO_2, improves drying property and the compactness of film; Overcome the deficiency that aqueous epoxy resins film easily chaps, bubbles; Improve sticking power and the stability of coating, finally enhance the preservative effect of film.The basic mechanical design feature of the Nanometer SiO2 powder wherein adopted is: particle diameter 5 ~ 15nm; Density: be less than 0.15g/cm3.

specific implementation method:

Below in conjunction with specific embodiment, the present invention is further explained:

Embodiment 1:

A kind of nano anticorrosive coating, the raw material comprising following weight:

Water-soluble epoxy resin emulsion 80, Nanometer SiO2 powder 10, tensio-active agent 1, dispersion agent 0.8, defoamer 1, deionized water 30.

Embodiment 2:

A kind of nano anticorrosive coating, the raw material comprising following weight:

Water-soluble epoxy resin emulsion 100, Nanometer SiO2 powder 15, tensio-active agent 2, dispersion agent 1.5, defoamer 1.6, deionized water 40.

Claims (2)

1. a nano anticorrosive coating, is characterized in that, coating comprises the raw material of following weight:

Water-soluble epoxy resin emulsion 80 ~ 100, Nanometer SiO2 powder 10 ~ 15, tensio-active agent 1 ~ 2, dispersion agent 0.8 ~ 1.5, defoamer 1 ~ 1.6, deionized water 30 ~ 40.

2. the preparation method of a kind of nano anticorrosive coating according to claim 1, is characterized in that, comprise the following steps:

1) nano-size SiO2 slurry is prepared: take raw material according to aforementioned proportion: deionized water 30 ~ 40, Nanometer SiO2 powder 10 ~ 15, tensio-active agent 1 ~ 2, dispersion agent 0.8 ~ 1.5, add in preparing tank, with 1500r/min high speed dispersion 60 minutes, complete hydrolysis, polycondensation; Add defoamer 1 ~ 1.6, prepare nano-size SiO2 slurry through mechanically mixing, dispersion;

2) will prepare nano-size SiO2 slurry adds in water-soluble epoxy resin emulsion 80 ~ 100, ultrasonic disperse, and finally filtration, froth breaking, packaging obtain coating finished product.