CN1986649B - Hydrophobic water-base iron red color paste - Google Patents

Abstract

The hydrophobic water-base iron red color paste consists of dispersant 100 3.0-6.0 wt%, defoaming agent Defoamer-155 0.1-0.5 wt%, wetting agent 436 1.0-3.0 wt%, iron red pigment-4125 55.0-65.0 wt%, antiseptic Dehygant LFM 0.1-0.3 wt%, pH regulator AMP-95 0.1-0.3 wt%, thickener HBR250 0.2-0.6 wt%, cosolvent 1, 2-propylene glycol 2.0-10.0 wt%, and water 14.3-28.5 wt%. The color paste has certain hydrophobicity, high coloring power, high storage stability, high heat storage stability and high compatibility with latex paint for outer wall.

Description

A kind of hydrophobic water-base iron red color paste

[technical field]

The present invention relates to paint field, particularly be a kind of hydrophobic water-base iron red color paste.

[background technology]

Begun to use in a large number aqueous color paste in the emulsion paint toning at present, used pigment comprises mineral dye such as red iron oxide, iron oxide yellow, and various pigment dyestuff such as phthalocyanine blue, organic red, organic yellow etc.Though the mineral-type red pigment has number of different types, because the iron oxide red pigment has splendid acid and alkali-resistance, weather-proof, solvent resistance, and low price, so the slurry of the redness in the aqueous color paste generally all comprises ferric oxide red colorant.Lot of domestic and international mill base professional production enterprise can both produce the iron oxide red mill base, as CPS, BASF, Clariant, Kunshan generation name, Changzhou coating institute etc.Because exterior wall all is based on hydrophilic coating several years ago, and the easier realization in water-based system of wetting ability mill base good open jar state and package stability, the research difficulty is also relatively low, therefore, nearly all in the market iron oxide red mill base all is to belong to the wetting ability mill base, also usefulness fine always in the wetting ability emulsion paint.

Along with exterior wall latex paint in recent years develops to hydrophobic direction gradually, base paint is more and more hydrophobic, this moment, hydrophilic iron oxide red mill base used in such base paint, with regard to toning problem such as be easy to loose colour to take place, grow dim, had a strong impact on the use properties of hydrophobicity colored paint.In order to improve the consistency of coating with lacquer with hydrophobic latex, improve the toning performance, each company hydrophobicity mill base that begins one's study, but because lyophobic dust often is difficult to keep the stability of length in water-based system, therefore the hydrophobicity mill base is easy to degradation problem under water, precipitation, the tinting strength occur dividing, and influence is used.How making mill base hydrophobic and have good state and stable tinting strength, is that each mill base manufacturing enterprise makes great efforts a great problem that solves.

[summary of the invention]

The purpose of this invention is to provide a kind of certain hydrophobic water-base iron red color paste that has, added the combination of suitable dispersion agent and thickening material in this mill base, make mill base various aspects of performance (as tinting strength, form and aspect, package stability etc.) that improvement all be arranged, and make mill base have certain hydrophobicity, thereby the consistency of raising and hydrophobicity exterior wall latex paint.

A kind of hydrophobic water-base iron red color paste, weight ratio is composed as follows:

Dispersion agent

100 3.0～6.0%

Defoamer Defoamer 155 0.1～0.5%

Wetting agent 436 1.0～3.0%

Iron oxide red pigment 4,125 55.0～65.0%

Sanitas Dehygant LFM 0.1～0.3%

PH conditioning agent AMP-95 0.1～0.3%

Thickening material HBR250 0.2～0.6%

Solubility promoter 1,2-propylene glycol 2.0～10.0%

Water 14.3～28.5%

Mill base of the present invention has certain hydrophobicity, and tinting strength is good, and stability in storage is good, and is also very stable in the heat storage.With the hydrophobicity exterior wall latex paint good consistency is arranged.Overcome that traditional water-based stability of pigment paste is poor, tinting strength is low, with defectives such as hydrophobicity exterior wall latex paint consistency differences, and cost is lower.The production technique of hydrophobic water-base iron red color paste is basic identical with the production technique of general iron oxide red mill base, and need not increases extra equipment or operation, need not to carry out special processing, is convenient to utilize existing installation to realize producing.

[embodiment]

The dispersion agent wetting agent comprises two kinds altogether, a kind of hydrophobically modified multipolymer amine salt dispersion agent, a kind of efficient wetting agent of non-ionic type that has hydrophilic radical, such two kinds of dispersion agents and wetting agent are arranged in pairs or groups mutually, can improve with iron oxide red pigment is effective and combine, make mill base integral body have certain hydrophobicity again, improved compatibility performance and color development performance with various emulsion paints.Though use the excessive dispersion agent can more effective wetting and dispersed color, excessive free dispersant may make and take place crosslinkedly between each pigment particles, impels pigment particles that flocculation sediment takes place again, impairs the package stability of mill base on the contrary.Therefore, generally speaking, do not recommend to use excessive dispersion agent.

In the mill base preparation process,, therefore need to add proper quantity of defoaming agent and carry out froth breaking owing to reasons such as mechanical dispersion can cause producing in the mill base more bubble.Mill base of the present invention can use commercially available most of water-based defoamers, but because defoaming effect and the froth breaking ability difference of different defoamers in different systems, so should select at concrete system.

Store for some time usually mill base preparation back, therefore it is rotten to prevent mill base to need to add fungicidal preservative, prolong the storage time of mill base, can use any commercially available sterilant among the present invention, for example 4,4-dimethyl oxazolidine and trimethylammonium homologue thereof also can use the sterilant of triazines anticorrosion and bactericidal agent or other type in addition.

In order to prevent sedimentary generation in the mill base, need in mill base, to add thickening material, in the present invention, Mierocrystalline cellulose HBR250 is first-selected material, because consumption is little, and effect is very obvious.

In some cases, it is acid that iron oxide color paste is, in order to reduce the corrodibility to ground, reduce the viscosity of pigment slurry simultaneously, need to add the pH value that mill base is regulated in the pH regulator agent, can realize, also can use other commercially available pH regulator agent by adding a spot of AMP-95.

In order to prolong the time of drying of mill base, improve freeze-thaw resistance, need to add some water conservation antifreezing agent, generally can select propylene glycol or other water conservation antifreezing agent for use.

The production technique of producing hydrophobic water-base iron red color paste is identical with general production technique, as follows: as in suitable quantity of water, to add an amount of dispersion agent, wetting agent, defoamer, solubility promoter, slowly adding iron oxide red pigment of back is uniformly dispersed, high speed dispersion half an hour then, sand milling is after reaching satisfied fineness (being generally less than 20 μ m) again, add pH regulator agent, sanitas and an amount of thickening material, being uniformly dispersed gets final product.

Among the present invention,

The 100th, a kind of low VOC, low smell, hydrophobically modified multipolymer amine salt dispersion agent has splendid wettingly, dispersed, and can provide the fabulous color developing of filming, suitable preparation water-borne coatings, solvent-free dispersible pigment color paste; The 436th, the efficient wetting agent of a kind of non-ionic type has splendid wettability to all kinds of face, filler, and color developing is good, can improve the loose colour grow diming phenomenon of emulsion paint; Defoamer 155 is faint yellow opaque liq, belongs to the efficient liquid defoamer of nonionic, has long-acting defoaming, presses down bubble, antifoam performance excellence; Dehygant LFM is colourless to yellow liquid, belongs to the sanitas of triazines nitrogen-containing heterocycle compound, can be used for the anticorrosion of emulsion paint, emulsion and other water-based systems; HBR250 is a cellulose thickener, and outward appearance is a white powder, should add in the mode of 3% pre-gelled during use.

Among the present invention, dispersion agent 100, defoamer Defoamer 155, wetting agent

436, sanitas Dehygant LFM is provided by Cognis company; PH regulator agent AMP-95 is provided by Angus company; Iron oxide red pigment 4125 is provided by Bayer company; Thickening material HBR250 is provided by Aqualon company.

Embodiment 1:

In 14.3g water, add the 6.0g dispersion agent

100,0.5 defoamer Defoamer 155,10.0g solubility promoter 1,2-propylene glycol, 3.0g wetting agent

436, slowly adding 65g iron oxide red pigment 4125 of back is uniformly dispersed, high speed dispersion half an hour then, sand milling is after reaching satisfied fineness (being generally less than 20 μ m) again, PH conditioning agent AMP-95, the 0.3g sanitas Dehygant LFM and the 0.6g thickening material HBR250 that add 0.3g, be uniformly dispersed, obtain the hydrophobic water-base iron red color paste of 65% pigment content.

Embodiment 2:

In 28.5g water, add the 3.0g dispersion agent

100,0.1 defoamer Defoamer 155,6.8g solubility promoter 1,2-propylene glycol, 1.0g wetting agent

436, slowly adding 60g iron oxide red pigment 4125 of back is uniformly dispersed, high speed dispersion half an hour then, sand milling is after reaching satisfied fineness (being generally less than 20 μ m) again, PH conditioning agent AMP-95, the 0.2g sanitas Dehygant LFM and the 0.2g thickening material HBR250 that add 0.2g, be uniformly dispersed, obtain the hydrophobic water-base iron red color paste of 60% pigment content.

Embodiment 3:

In 28.5.g water, add the 4.6g dispersion agent

100,0.3 defoamer Defoamer 155,4.6g solubility promoter 1,2-propylene glycol, 2.0g wetting agent

436, slowly adding 55g iron oxide red pigment 4125 of back is uniformly dispersed, high speed dispersion half an hour then, sand milling is after reaching satisfied fineness (being generally less than 20 μ m) again, PH conditioning agent AMP-95, the 0.1g sanitas Dehygant LFM and the 0.4g thickening material HBR250 that add 0.1g, be uniformly dispersed, obtain the hydrophobic water-base iron red color paste of 55% pigment content.

Embodiment 4:

In 24.8g water, add the 6.0g dispersion agent

100,0.4 defoamer Defoamer 155,2.0g solubility promoter 1,2-propylene glycol, 2.8g wetting agent

436, slowly adding 65g iron oxide red pigment 4125 of back is uniformly dispersed, high speed dispersion half an hour then, sand milling is after reaching satisfied fineness (being generally less than 20 μ m) again, PH conditioning agent AMP-95, the 0.2g sanitas Dehygant LFM and the 0.5g thickening material HBR250 that add 0.3g, be uniformly dispersed, obtain the hydrophobic water-base iron red color paste of 65% pigment content.

The physical and chemical index of embodiment gained hydrophobic water-base iron red color paste

	Pigment content	Viscosity	Fineness	Consistency (aberration)
					Embodiment 1	65％	100KU	Less than 20 μ m	∠0.7
Embodiment 2	60％	94KU	Less than 20 μ m	∠0.7
					Embodiment 3	55％	90KU	Less than 20 μ m	∠0.7
Embodiment 4	65％	97KU	Less than 20 μ m	∠0.7

The organic red slurry that makes according to above prescription, viscosity suitable (standard test methods of the coating viscosity that ASTM D 562-01Standard Test Method forConsistency of Paints Measuring Krebs Unit (KU) Viscosity Using a Stormer-TypeViscometer employing Stormer-type viscometer measurement Krebs unit uses), every index (as fineness, tinting strength, consistency etc.) does not change substantially after 50 ℃ of baking ovens are stored 2 months, phenomenons such as branch water, precipitation do not take place, and have good storage stability; With multiple hydrophilic, hydrophobicity inner, external wall base paint consistency is good, aberration is fit to most base paints and uses substantially in 0.7.

Claims (1)

1. hydrophobic water-base iron red color paste, weight ratio is composed as follows:

Dispersion agent

100 3.0～6.0%

Defoamer Defoamer 155 0.1～0.5%

Wetting agent 436 1.0～3.0%

Iron oxide red pigment 4,125 55.0～65.0%

Sanitas Dehygant LFM 0.1～0.3%

PH conditioning agent AMP-95 0.1～0.3%

Thickening material HBR250 0.2～0.6%

Solubility promoter 1,2-propylene glycol 2.0～10.0%

Water 14.3～28.5%.