High-moisture-retention VOC-free iron oxide color paste and preparation method thereof

Abstract

The invention discloses a high-moisture-retention VOC-free iron oxide color paste and a preparation method thereof. The high-moisture-retention VOC-free iron oxide color paste is composed of a dissolution-assisting moisture-retaining agent, a pH adjusting agent, a novel foam-inhibiting defoaming agent, a wetting dispersant, an aqueous rheological auxiliary agent, an iron oxide pigment and deionized water. The preparation method comprises: 1) adding the dissolution-assisting moisture-retaining agent, the pH adjusting agent, the novel foam-inhibiting defoaming agent and the wetting dispersant into deionized water and mixing uniformly; 2) slowly adding iron oxide pigment and performing high-speed dispersion, so as to form uniform paste dispersion under high-speed stirring state; 3) sending the paste into a ball mill by a pump and performing grinding dispersion for 2-5 times until the fineness of the paste dispersion is less than 2 mu m; and 4) adding the aqueous rheological auxiliary agent into the grinded paste dispersion, and adjusting the viscosity scope at 70-85 KU, so as to obtain the iron oxide ultrafine aqueous color paste dispersion. The high-moisture-retention VOC-free iron oxide color paste is easily controllable in quality, good in moisture retention performance, high in stability and small in environmental pollution.

Description

Technical field

[0001] The present invention relates to an iron oxide color paste and a preparation method thereof, in particular to a high moisturizing VOC-free iron oxide color paste and a preparation method thereof. Background technique

[0002] As a colorant, color paste is an important component of paint. At present, water-based color paste has been widely used in architectural paint coloring. Among them, interior and exterior wall latex paint accounts for half of the entire architectural coatings. Because interior and exterior wall latex paint is good for moisturizing and antifreeze For special requirements, low-boiling alcohol ether organic solvents such as ethylene glycol and glycerin are usually added to the color paste to improve its moisturizing and anti-freezing properties. In addition, in order to improve the storage stability and anti-sedimentation of the color paste, non-ionic surfactants containing alkylphenol polyoxyethylene ethers (APEO) are often added. T...

Examples

Embodiment 1

[0022] Step 1): Mix 10% solubilizing moisturizing agent: polyethylene glycol, 1% pH regulator: ammonia water, 1% new anti-foaming and defoaming agent: polysiloxane, 10% wetting and dispersing agent by weight percentage: Mix fatty acids and 27% deionized water;

[0023] Step 2): Slowly add 50% iron oxide red pigment to the mixed liquid obtained in step 1) for high-speed dispersion, and form a uniform slurry dispersion under high-speed stirring;

[0024] Step 3): Use a pump to input the slurry dispersion into the bead mill for grinding and dispersing for 2 to 5 times, until the fineness of the slurry dispersion is less than 2 μm, then stop grinding;

[0025] Step 4): Add 1% water-based rheology additive to the ground slurry dispersion, adjust the viscosity range to 70-85KU, and obtain iron oxide red ultra-fine water-based color paste dispersion.

[0026] Under the premise of ensuring other performances, the iron oxide red slurry obtained in the present invention has a VOC conte...

Embodiment 2

[0028] Step 1): 10% solubilizing and moisturizing agent: polypropylene glycol, 1% pH regulator: urea, 1% new anti-foaming and defoaming agent: silicone mineral oil, 10% wetting and dispersing agent: aliphatic Mix amides and 36% deionized water;

[0029] Step 2): Slowly add 40% iron oxide red pigment for high-speed dispersion, and form a uniform slurry dispersion under high-speed stirring;

[0030] Step 3): Use a pump to input the slurry dispersion into the bead mill for grinding and dispersing for 2 to 5 times, until the fineness of the slurry dispersion is less than 2 μm, then stop grinding;

[0031] Step 4): Add 2% water-based rheology additive to the ground slurry dispersion, adjust the viscosity range to 70-85KU, and obtain iron oxide red ultra-fine water-based color paste dispersion.

[0032] Under the premise of ensuring other performances, the iron oxide red slurry obtained in the present invention has a VOC content of N.D. and an APEO of 80PPM, meeting the standards o...

Technical field

[0001] The present invention relates to an iron oxide color paste and a preparation method thereof, in particular to a high moisturizing VOC-free iron oxide color paste and a preparation method thereof. Background technique

[0002] As a colorant, color paste is an important component of paint. At present, water-based color paste has been widely used in architectural paint coloring. Among them, interior and exterior wall latex paint accounts for half of the entire architectural coatings. Because interior and exterior wall latex paint is good for moisturizing and antifreeze For special requirements, low-boiling alcohol ether organic solvents such as ethylene glycol and glycerin are usually added to the color paste to improve its moisturizing and anti-freezing properties. In addition, in order to improve the storage stability and anti-sedimentation of the color paste, non-ionic surfactants containing alkylphenol polyoxyethylene ethers (APEO) are often added. T...

Examples

Embodiment 1

[0022] Step 1): Mix 10% solubilizing moisturizing agent: polyethylene glycol, 1% pH regulator: ammonia water, 1% new anti-foaming and defoaming agent: polysiloxane, 10% wetting and dispersing agent by weight percentage: Mix fatty acids and 27% deionized water;

[0023] Step 2): Slowly add 50% iron oxide red pigment to the mixed liquid obtained in step 1) for high-speed dispersion, and form a uniform slurry dispersion under high-speed stirring;

[0024] Step 3): Use a pump to input the slurry dispersion into the bead mill for grinding and dispersing for 2 to 5 times, until the fineness of the slurry dispersion is less than 2 μm, then stop grinding;

[0025] Step 4): Add 1% water-based rheology additive to the ground slurry dispersion, adjust the viscosity range to 70-85KU, and obtain iron oxide red ultra-fine water-based color paste dispersion.

[0026] Under the premise of ensuring other performances, the iron oxide red slurry obtained in the present invention has a VOC conte...

Embodiment 2

[0028] Step 1): 10% solubilizing and moisturizing agent: polypropylene glycol, 1% pH regulator: urea, 1% new anti-foaming and defoaming agent: silicone mineral oil, 10% wetting and dispersing agent: aliphatic Mix amides and 36% deionized water;

[0029] Step 2): Slowly add 40% iron oxide red pigment for high-speed dispersion, and form a uniform slurry dispersion under high-speed stirring;

[0030] Step 3): Use a pump to input the slurry dispersion into the bead mill for grinding and dispersing for 2 to 5 times, until the fineness of the slurry dispersion is less than 2 μm, then stop grinding;

[0031] Step 4): Add 2% water-based rheology additive to the ground slurry dispersion, adjust the viscosity range to 70-85KU, and obtain iron oxide red ultra-fine water-based color paste dispersion.

[0032] Under the premise of ensuring other performances, the iron oxide red slurry obtained in the present invention has a VOC content of N.D. and an APEO of 80PPM, meeting the standards o...

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