CN104073050A

CN104073050A - Modified iron oxide red pigment and preparation method thereof

Info

Publication number: CN104073050A
Application number: CN201410273916.4A
Authority: CN
Inventors: 李峰; 李焕
Original assignee: ANHUI AOBANG NEW MATERIAL Co Ltd
Current assignee: ANHUI AOBANG NEW MATERIAL Co Ltd
Priority date: 2014-06-15
Filing date: 2014-06-15
Publication date: 2014-10-01

Abstract

The invention discloses a modified iron oxide red pigment and a preparation method thereof. The preparation method comprises the following steps of: adding iron oxide red powder in deionized water to prepare slurry, adding vinylalkoxyl phosphate and an alcohol amine dispersants in the slurry, dispersing at a high speed to adequately and uniformly mix the slurry, drying the mixed materials, carrying out oxygen-free calcining for 3-3.5 hours at 200-400 DEG C, and cooling and crushing to obtain the product. The surfaces of iron oxide red grains are coated with vinylalkoxyl phosphate, and the pigment is capable of forming a phosphate coating when coated on a metal surface, thus effectively improving the corrosion resistance of the pigment, reducing the usage amount of the pigment, and greatly reducing cost; meanwhile, acrylate groups are located on the surfaces of the grains, thus effectively improving the dispersion stability of the pigment in an organic medium.

Description

A kind of modified oxidized iron oxide red pigment and preparation method thereof

Technical field

The present invention relates to pigment technology field, be specifically related to a kind of modified oxidized iron oxide red pigment and preparation method thereof.

Background technology

Red iron oxide is more traditional pigment, applies very extensively, is generally used in the industry such as building, rubber, plastics, coating.Be good rust-stabilising pigment in coating industry red iron oxide, particularly iron oxide red primer has antirust function, can replace the red lead paint of high price, saves non-ferrous metal.Now for rust-proofing primer, performance requriements is more and more higher, and the also corresponding enhancing of the application requiring of traditional red iron oxide in antiseptic and rustproof paint, in order to adapt to the development of industry, traditional red iron oxide is carried out to corresponding modification, imperative to improve its over-all properties.Given this, the present invention is coated the red iron oxide of producing a kind of rustless property excellence with advanced technologies by science.

Summary of the invention

First technical problem to be solved by this invention is to provide the modified oxidized iron oxide red of the corrosion-resistant and stably dispersing performance of a kind of effective raising.

For solving the problems of the technologies described above, the modified oxidized iron oxide red of the present invention comprises the slurry that the weight concentration be made up of red iron oxide and deionized water is 40～60%, in the weight ratio of red iron oxide, also adds following raw materials according in this slurry:

Vinyl alkoxy phosphoric acid ester: 0.1～4%,

Alcamines dispersion agent: 0.1～0.5%.

Described vinyl alkoxy phosphoric acid ester is that the model of French Rhodia production is one or both of PAM-100, PAM-200

Described alcamines dispersion agent be α-amino isopropyl alcohol, diethanolamine, trolamine,, N, the one or more combination of N-dimethylethanolamine.

Technique scheme utilizes vinyl alkoxy phosphoric acid ester (organic substance of phosphoric acid group) to be coated, make it in the time of application, can be attached to substrate surface and form one deck phosphatize phosphate coat, and make the organosilicon reticulated structure of coating formation densification, thereby can effectively raise the corrosion resistance nature of pigment, simultaneous oxidation iron oxide red surface has one deck to contain the coating film of propionic ester group, effectively raises the stably dispersing performance of pigment in organic medium.

Second technical problem to be solved by this invention is to provide a kind of preparation method of novel modifying titanium dioxide white rust-stabilising pigment.

For solving the problems of the technologies described above, the preparation method of the modified oxidized iron oxide red of the present invention is: first red iron oxide being added deionized water to make weight concentration is 40～60% slurry, in with the weight ratio of red iron oxide, in slurry, add 0.1～4% vinyl alkoxy phosphoric acid ester and 0.1～0.5% alcamines dispersion agent, high speed dispersion fully mixes it.By after the drying materials mixing, at 200～400 DEG C, carry out anaerobic calcining 3～3.5 hours, cooling crush obtains product.

Described alcamines dispersion agent be α-amino isopropyl alcohol, diethanolamine, trolamine,, N, the one or more combination of N dimethylethanolamine.

The present invention is by the surface treatment to red iron oxide, utilize vinyl alkoxy phosphoric acid ester to be coated its surface, improve antiseptic property by bound phosphate groups in the phosphatization complexing action of metallic surface on the one hand, simultaneously, make red iron oxide surface contain acrylate group, can effectively improve its stably dispersing performance in organic medium, reach a best effect.

The invention has the advantages that the condition of surface that can effectively improve red iron oxide, the covered effect of realizing ideal.In improving Investigation of stabilized dispersion of nano, also there is good antiseptic property.Therefore, reduce the usage quantity of pigment, reduced greatly cost.

Embodiment

Example one:

First 50 kilograms of red iron oxides being added deionized water to make weight concentration is 60% slurry, in the weight ratio of red iron oxide, in slurry, add the PAM-100 of 1.5 kilograms and 0.5 alcamines dispersion agent, 1200 turn high speed dispersion fully mixes it.By after the drying materials mixing, at 300 DEG C, carry out anaerobic calcining 3.5 hours, cooling crush obtains 50 kilograms of product

Example two:

First 40 kilograms of red iron oxides being added deionized water to make weight concentration is 50% slurry, in the weight ratio of red iron oxide, in slurry, add the PAM-100 of 1 kilogram and 0.5 alcamines dispersion agent, 1200 turn high speed dispersion fully mixes it.By after the drying materials mixing, at 300 DEG C, carry out anaerobic calcining 3.5 hours, cooling crush obtains 39 kilograms of product.

Example three:

First 40 kilograms of red iron oxides being added deionized water to make weight concentration is 50% slurry, in the weight ratio of red iron oxide, in slurry, add the PAM-200 of 1 kilogram and 0.5 alcamines dispersion agent, 1200 turn high speed dispersion fully mixes it.By after the drying materials mixing, at 350 DEG C, carry out anaerobic calcining 3 hours, cooling crush obtains 40 kilograms of product.

Dispersed detection:

After getting respectively sample that 4 grams of untreated samples and example one to ten obtain and 6 grams of Synolac grinding distribution 300 turning on plain grinding instrument, detect the fineness of sample with Hegman grind gage, judge the dispersiveness of product according to the size of fineness, as table one.

Table one: the dispersed data of product

Antiseptic property detects:

First sample (sample that untreated samples, example one to ten obtain) is obtained to sample paint according to the anticorrosion middle grey base paint formulation of table two.

Table two: anticorrosion middle grey base paint formulation

Raw material	Sample paint (components by weight percent)
		Epoxy resin (50%)	480
Sample	15
		Talcum powder	8
Process white	12
		Organophilic clay	1.5
Dimethylbenzene	10
		Butanols	5

By above-mentioned sample paint and 200# daiamid epoxy curing agent, (according to weight ratio paint in 6: 1, make model with general steel plate, 45 ± 3 microns of paint film thickness, detect salt spray resistance, and performance detection data as shown in Table 3.

Table three: product salt spray resistance

Sample number into spectrum	Salt fog result (h, non-corrosive, non-foaming, do not come off)
		The sample paint that untreated samples makes	500
The sample paint that example one makes	780
		The sample paint that example two makes	860
The sample paint that example three makes	780

Can find out from table one and table three data, dispersion stabilization and the preservative property of surface treated titanium dioxide are greatly improved, and it is dispersed and rustless property is all very excellent.

Claims

1. a modified oxidized iron oxide red pigment, is characterized in that: the slurry that the weight concentration of being made up of red iron oxide and deionized water is 40～60%, in the weight ratio of red iron oxide, in this slurry, also add following raw materials according:

Vinyl alkoxy phosphoric acid ester: 0.1～4%,

Alcamines dispersion agent: 0.1～0.5%.

2. the modified oxidized iron oxide red pigment of one according to claim 1, is characterized in that: described alcamines dispersion agent is diethanolamine, trolamine, α-amino isopropyl alcohol, N, the one or more combination of N-dimethylethanolamine.

3. the preparation method of a kind of modified oxidized iron oxide red pigment according to claim 1 and 2, it is characterized in that: first red iron oxide being added deionized water to make weight concentration is 40～60% slurry, in with the weight ratio of red iron oxide, in slurry, add 0.1～4% vinyl alkoxy phosphoric acid ester and 0.1～0.5% alcamines dispersion agent, high speed dispersion fully mixes it, by after the drying materials mixing, at 200～100 DEG C, carry out anaerobic calcining 3～3.5 hours, cooling crush obtains product.