Dispersant is used to reduce the time and energy required to complete the dispersion process, and to stabilize the dispersed pigment dispersion, the surface properties of the modified pigment particles, and the motion of the pigment particles, which are embodied in the following aspects:

Distributed shortening time to improve gloss, improve coloring and hiding power, improve the color and color, to prevent floating, prevent flocculation, to prevent the settlement.

1, to enhance the luster, increase flow flat gloss effect on actual most depends mainly on the coating surface of light scattering (that is, a certain smoothness can be. Of course, need testing instruments decided whether to suffice to be smooth, not only consider the number of primary particles, shape, and consider their combination), when the particle size is less than 1 / 2 of the incident light (the numerical uncertainty), performance of light refraction, gloss will not be put up again. Similarly, the hiding power relying on scattering provides mainly cover the hiding power does not increase (in addition to carbon black is mainly rely on light absorption, organic pigment forgot). Note: the incident light is the range of visible light is not good; but the original number of particles decreased, is to reduce the structural viscosity, but the increase of the surface will make the number of free resin is reduced, whether it is not good, but the general powder coating flow is not the more fine.

2, to prevent floating

3, pay attention to improve tinting tinting strength in the automatic matching system is not better

4, reduce viscosity, increase the amount of pigment

5, reduce the flocculation is such, but the more fine particle surface can be higher, the need for the higher the absorption strength of the dispersant, but the adsorption strength of high dispersion may cause the coating performance of the adverse,

6, the increase in storage stability in fact, the reason and the similar, once the stability of the dispersion agent is not enough, but the stability of storage (of course, from your picture is no problem) 7, increase the color saturation, increase the color saturation 8, increase transparency (organic pigment) or hiding power (inorganic pigment)

Nanjing Hanbao industrial raw materials Co., Ltd. agent Tego Dispers wetting dispersing agent to help pigment wetting and stabilizing, floating and pigment to prevent the settlement, the largest amount of dye in the storage process to maintain stable pigments covering force and color strength while ensuring, at least the grinding steps. Because these additives can reduce the viscosity, dispersion can increase to the highest pigment concentration, so the production of paint and pigment concentrate more cost-effective. Recommended TEGODispers 757 W for the production of water-based pigment concentrates. For corrosion resistant waterborne coatings, it is also the preferred product. Like 750W TEGODispers and TEGODispers 755 W, the highest optical and rheological properties can be met. For the suitable solvent type for water-based formula of universal colorants, TEGODispers 65x series are existing not containing ethoxylated alkylphenol standard product market. TEGODispers 670, 656 and 685 are especially suitable for modern solvent based formulations. In UV system, TEGODispers 685 is suitable for all of the pigments, TEGODispers 688 is suitable for the extinction of the powder. All of the TEGODispers products were not containing the ethyl group of the alkyl phenol.

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An excellent dispersing agent shall meet the following requirements:

1, good dispersion performance, to prevent the aggregation of filler particles;

2, with the resin, fillers have appropriate compatibility; good thermal stability;

The flow of 3, when processing the good; do not cause color drift;

4, do not affect the performance of the product; non-toxic, low cost.

Dispersing agent general for masterbatch quality 5%

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Fatty acids, aliphatic amides and esters

0.5%) and stearic amide and higher alcohols, can improve the lubrication and thermal stability, the dosage (mass fraction, the same below 0.3% - 0.8%, but also can be used for polyolefin smooth agent; hexene bis stearamide, also known as ethylene bis stearamide (EBS) is a kind of high melting point of the lubricant, the dosage is 0.5% ~ 2%; stearic acid monoglyceride ester (GMS), three stearic acid glycerol ester (HTG); oleic acid dosage of 0.2% ~ 0.5%; hydrocarbon paraffin wax melting point for 57 to 70 DEG C, insoluble in water, soluble in organic solvent, resin dispersion and compatibility, thermal stability, the amount of a in the following.

Shi Lalei

Despite belonging to external lubricant paraffin, but non polarity straight chain hydrocarbons, not wetting of the metal surface. That is to say can not stop the PVC resin adhesion metal wall, only and stearic acid, calcium stearate and, in order to play a synergistic effect.

Liquid paraffin: freezing point (- 15 DEG C) - (- 35 DEG C), extrusion and injection molding processing, compatibility with the resin is poor, dosage is 0.3% - 0.5%, excessive. On the contrary, processing performance worse.

Microcrystalline wax: derived from petroleum refining processes, the relative molecular quality is high, and there is a lot of isomers, 65-90 DEG C melting point, good lubrication and thermal stability, but scattered poor, dosage is generally 0.1% - 0.2%, the best and stearic acid, butyl ester, fatty acid.

Metal soap

Is a metal soap, such as in a variety of plastic barium stearate BaSt) applies, the amount is about 0.5%; zinc stearate (ZnSt) for polyolefin, ABS, dosage is 0.3%; calcium stearate (with cast) for general plastics, lubrication, dosage of 0.2% ~ 1.5%; other stearic acid soap such as cadmium stearate (CdSt), of stearic acid magnesium MgSt, of stearic acid, copper CuSt metal salts of higher fatty acids said.

Low molecular wax

Low molecular wax is a series of properties of different kinds of polyethylene (polymer or copolymer), polypropylene, polystyrene or other polymer modified materials as raw materials, through cleavage, oxidation and a series of different properties.

Its main products are: the polymer, the oxidation of the polymer, ethylene acrylic acid copolymer, ethylene vinyl acetate copolymer, low molecular weight polymer and other five major categories. Polyethylene wax, polyethylene wax, polyethylene glycol, PEG, Glycol (Ethylene) is the most commonly used

Commonly used polyethylene wax (polyethylene glycol) average relative molecular mass for 1500-4000, the softening point for 102 DEG C; polyethylene wax and other specifications of the average relative molecular mass for 10000 ~ 20000, the softening point for 106 DEG C; long chain molecules of oxidized polyethylene wax with a certain amount of ester or soap, and internal and external lubrication of PVC, PE, PP, ABS is balanced, the effect is better, the transparency or. Because of the variety and the practical application of dispersant, it is very important to select the suitable dispersant.

Polyethylene glycol 200 or 400 (molecular weight about 190-420) is a good dispersing agent of water soluble dispersion system. Polyethylene glycol 200 or 400 is lipophilic, and can be very good to have a stable dispersion system with a relatively low HLB (value).

One, product performance

HPMA is a low molecular weight polymer electrolyte, the average relative molecular weight of 800 ~ 400, non-toxic, soluble in water, chemical stability and high thermal stability, decomposition temperature above 330. At high temperature (<350) and high pH, there was obvious effect of dissolution. HPMA is suitable for the use of alkaline water quality or with other drugs. At 300, HPMA has good scale inhibition and dispersion effect, and the scale inhibition time is 100h. Due to the performance of scale inhibition of HPMA and excellent high temperature performance, so in the flash device for desalination of seawater and low pressure boiler, steam locomotive, dehydration of crude oil, petroleum pipeline, and industrial circulating cooling water get widely used. In addition, HPMA has a certain inhibition effect, and the effect is better with the combination of zinc and salt.

HPMA can also be used for cement admixture.

Two, quality indicators in line with /T 10535-1997 GB

Item index

Exterior light yellow to brownish red transparent liquid

Solid content% = 48

Bromine value mg/g = 80

The average molecular weight of more than 450

PH (1% aqueous solution) 2.0-3.0

Density (20 C) g/cm = 1.18

Three, using method

HPMA usually to 1 ~ 15ppm and organic phosphonate compound for circulating cooling water, oilfield water injection, crude oil dehydration and low pressure boiler furnace, with the role of good to inhibit scale formation and stripping the old scale, and the scale inhibition rate up to 98%. HPMA can effectively prevent the corrosion of carbon steel when it is mixed with zinc salt.

Four, security and protection

HPMA is acidic, should avoid contact with skin, eyes, etc., after contact with a large amount of water rinse.