Preparation method of water-based aluminum pigment for external wall heat insulation

Abstract

The invention discloses a preparation method of a water-based aluminum pigment for external wall heat insulation. The method comprise the steps of feeding raw materials including spherical aluminum powder, a grinding medium, an environment-friendly solvent oil, oleic acid or erucic acid, a passivant, and a titanate coupler into a ball mill; sealing the ball mill, performing ball milling and discharging the raw materials with the environment-friendly solvent oil; conveying the materials into a vibration screen through a pipeline to be screened, removing screen tailings, and putting the materials into a frame filter press to conduct filter pressing, so as to obtain filter cakes with a solid content of 80 percent; and putting the filter cakes, an alcohol or ether solvent with good water miscibility and low molecular weight polyvinyl alcohol together into a reaction kettle, keeping the temperature, discharging the materials, putting the materials into the frame filter press to conduct filter pressing, and performing solid liquid separation so as to obtain a finished product. According to the method, the environment-friendly solvent is adopted to meet national environmental requirements. The aluminum pigment prepared through the method has good water resistance, acid resistance and alkali resistance of the aluminum pigment are achieved, the environmental innocuousness and the service life of the aluminum pigment as a wall insulating coating are improved, and the aluminum pigment is easy to disperse in a paint.

Description

technical field

[0001] The invention relates to a method for preparing an environment-friendly metal pigment for exterior wall paint, in particular to a method for preparing a water-based heat-insulating aluminum pigment for exterior walls. technical background

[0002] With the continuous improvement of people's awareness of environmental protection and the increasingly stringent environmental protection regulations, environmentally friendly coatings will become the protagonists of the world coatings market in the 21st century, and currently have a very broad market in China. As the main raw material of metallic pigments for exterior wall coatings, the research and development of water-based aluminum pigments will open up an environmentally friendly road for the production of domestic metallic coatings. Through the research on traditional solvent-based aluminum pigments, it is found that the coating of aluminum pigments has good heat insulation effect after coating. At pres...

Examples

Embodiment 1

[0021] This embodiment includes the following steps:

[0022] Step 1: Take 60 kg of spherical aluminum powder as the raw material, 1200 kg of grinding medium steel balls with a diameter of 0.8mm, 120 kg of D80 solvent oil, 0.36 kg of oleic acid, 0.15 kg of phosphate, and 102 0.12 kg of titanate coupling agent into the ball mill middle;

[0023] Step 2, seal the ball mill, ball mill with a speed of 60r / min for 6 hours, adjust the speed of the ball mill to 30r / min, ball mill for 2 hours, and discharge with environmentally friendly solvent oil;

[0024] Step 3, the material is input into the vibrating sieve through the pipeline for screening and grading, and the sieve residue is removed, and then entered into a plate and frame filter press for press filtration to obtain a filter cake with a solid content of 80%;

[0025] Step 4, add the above filter cake, 160 kg of propylene glycol methyl ether, and 7.5 kg of polyvinyl alcohol with a molecular weight of 1000 into the reaction ke...

Embodiment 2

[0027] This embodiment includes the following steps:

[0028] Step 1: Take 50 kg of raw material spherical aluminum powder, 1200 kg of grinding medium steel balls with a diameter of 1.0 mm, 80 kg of D70 solvent oil, 0.20 kg of oleic acid, 0.10 kg of molybdate, and 0.1 kg of titanate coupling agent 102 in the ball mill;

[0029] Step 2, seal the ball mill, ball mill with a speed of 60r / min for 6 hours, adjust the speed of the ball mill to 30r / min, ball mill for 2 hours, and discharge with environmentally friendly solvent oil;

[0030] Step 3, the material is input into the vibrating sieve through the pipeline for screening and grading, and the sieve residue is removed, and then entered into a plate and frame filter press for press filtration to obtain a filter cake with a solid content of 80%;

[0031] Step 4, add the obtained filter cake, 120 kg of ethylene glycol monobutyl ether, and 5.0 kg of polyvinyl alcohol with a molecular weight of 500 into the reaction kettle, and rea...

Embodiment 3

[0033] This embodiment includes the following steps:

[0034] Step 1: Take 40 kg of spherical aluminum powder as raw material, 1200 kg of grinding medium steel balls with a diameter of 1.2 mm, 100 kg of D60 solvent oil, 0.3 kg of oleic acid, 0.12 kg of citric acid, and 102 0.08 kg of titanate coupling agent into the ball mill middle;

[0035] Step 2, seal the ball mill, ball mill with a speed of 60r / min for 6 hours, adjust the speed of the ball mill to 30r / min, ball mill for 2 hours, and discharge with environmentally friendly solvent oil;

[0036] Step 3, the material is input into the vibrating sieve through the pipeline for screening and grading, and the sieve residue is removed, and then entered into a plate and frame filter press for press filtration to obtain a filter cake with a solid content of 80%;

[0037] Step 4, add the obtained filter cake, 140 kg of ethanol, and 6.0 kg of polyvinyl alcohol with a molecular weight of 2000 into the reaction kettle, react at 40°C f...

technical field

[0001] The invention relates to a method for preparing an environment-friendly metal pigment for exterior wall paint, in particular to a method for preparing a water-based heat-insulating aluminum pigment for exterior walls. technical background

[0002] With the continuous improvement of people's awareness of environmental protection and the increasingly stringent environmental protection regulations, environmentally friendly coatings will become the protagonists of the world coatings market in the 21st century, and currently have a very broad market in China. As the main raw material of metallic pigments for exterior wall coatings, the research and development of water-based aluminum pigments will open up an environmentally friendly road for the production of domestic metallic coatings. Through the research on traditional solvent-based aluminum pigments, it is found that the coating of aluminum pigments has good heat insulation effect after coating. At pres...

Examples

Embodiment 1

[0021] This embodiment includes the following steps:

[0022] Step 1: Take 60 kg of spherical aluminum powder as the raw material, 1200 kg of grinding medium steel balls with a diameter of 0.8mm, 120 kg of D80 solvent oil, 0.36 kg of oleic acid, 0.15 kg of phosphate, and 102 0.12 kg of titanate coupling agent into the ball mill middle;

[0023] Step 2, seal the ball mill, ball mill with a speed of 60r / min for 6 hours, adjust the speed of the ball mill to 30r / min, ball mill for 2 hours, and discharge with environmentally friendly solvent oil;

[0024] Step 3, the material is input into the vibrating sieve through the pipeline for screening and grading, and the sieve residue is removed, and then entered into a plate and frame filter press for press filtration to obtain a filter cake with a solid content of 80%;

[0025] Step 4, add the above filter cake, 160 kg of propylene glycol methyl ether, and 7.5 kg of polyvinyl alcohol with a molecular weight of 1000 into the reaction ke...

Embodiment 2

[0027] This embodiment includes the following steps:

[0028] Step 1: Take 50 kg of raw material spherical aluminum powder, 1200 kg of grinding medium steel balls with a diameter of 1.0 mm, 80 kg of D70 solvent oil, 0.20 kg of oleic acid, 0.10 kg of molybdate, and 0.1 kg of titanate coupling agent 102 in the ball mill;

[0029] Step 2, seal the ball mill, ball mill with a speed of 60r / min for 6 hours, adjust the speed of the ball mill to 30r / min, ball mill for 2 hours, and discharge with environmentally friendly solvent oil;

[0030] Step 3, the material is input into the vibrating sieve through the pipeline for screening and grading, and the sieve residue is removed, and then entered into a plate and frame filter press for press filtration to obtain a filter cake with a solid content of 80%;

[0031] Step 4, add the obtained filter cake, 120 kg of ethylene glycol monobutyl ether, and 5.0 kg of polyvinyl alcohol with a molecular weight of 500 into the reaction kettle, and rea...

Embodiment 3

[0033] This embodiment includes the following steps:

[0034] Step 1: Take 40 kg of spherical aluminum powder as raw material, 1200 kg of grinding medium steel balls with a diameter of 1.2 mm, 100 kg of D60 solvent oil, 0.3 kg of oleic acid, 0.12 kg of citric acid, and 102 0.08 kg of titanate coupling agent into the ball mill middle;

[0035] Step 2, seal the ball mill, ball mill with a speed of 60r / min for 6 hours, adjust the speed of the ball mill to 30r / min, ball mill for 2 hours, and discharge with environmentally friendly solvent oil;

[0036] Step 3, the material is input into the vibrating sieve through the pipeline for screening and grading, and the sieve residue is removed, and then entered into a plate and frame filter press for press filtration to obtain a filter cake with a solid content of 80%;

[0037] Step 4, add the obtained filter cake, 140 kg of ethanol, and 6.0 kg of polyvinyl alcohol with a molecular weight of 2000 into the reaction kettle, react at 40°C f...