8990 Iron oxide yellow pigment paste

1. Product Introduction.

CAISON 89 series building wall paints pigment paste is suitable for coloring all kinds of interior wall and exterior wall paints or latex paints. This series pigment paste is no resin, high pigment concent, good compatible with several water-based paints, it can be used for color matching of water-based coatings in coatings factories. Also it is good for tinting water-based inks and art pigment paints.

2. Product features:

1). CAISON 89 series inorganic iron oxide based water-based pigment paste is cost-effective, better weather resistance and sunlight fastness, to meet the interior and exterior wall paints coloring requirements;

2). CAISON 89 series organic water-based pigment paste has a wider application range, high pigment content and no resin system, it can be used for tinting of all types of water-based latex paint, wood paint, metal baking paint, epoxy paint and other water-based paints.

3). CAISON 89 series pigment paste is resin free system, it doesn't only have good  compatible with water based system, but also is compatible with some resins. So it can be suitable for various types of water-based paints, such as latex paints, water-based alkyd, acrylic acid, polyurethane, alkyd-acrylic acid, epoxy, amino-alkyd, polyester and modified resin coating.

4). CAISON 89 Series water-based pigment paste is good stability with zero ethylene glycol and lower VOC, and it is eco-friendly water-based pigment paste.

5). Fineness distribution of 89 series pigment paste is uniform, high tinting strength and hiding power, color difference between different batches is stable and controllable.

3. Using instruction.

1). Please stir the pigment paste uniformly before using. If some particles precipitation happened after long time storage, you can make fully stirring and filtrating, and it still can be useful.

2). If any left after using, it must be tightly sealed to avoid the quality going bad.

Bubble problem in the production of aqueous pigment paste

Because of adding of surfactant, the water based pigment paste is very easy to cause bubble, just like milk emulsion. During the opened dispersion, the dispersed machines that is high-speed grinding easily bring heat energy to the pigment paste, the bubble will made when air goes into the pigment paste liquid.

The bubble problem is a common phenomenon that always troubles pigment paste manufacturers in the production management. These bubble will lead that the pigment particles within the pigment paste can not be well cut and shattered, and resulting in poor dispersion and production efficiency of aqueous pigment paste. This will increase energy consumption, so it is bad thing.

Generally, there are three ways to solve the bubbles:
One, to add defoamer to change the surface tension of pigment paste. But Shanghai Caison pigment paste engineers will not easily add too much defoamers, because it may lead to pattern cracks when clients use pigment paste for textile printing,  especially in the poor absorption of paper coating.
Two, to eliminate the bubble through the mechanical ways, this technology is being explored by us.
Three, to prevent air from entering the containers of water based pigment paste, but also need to reduce too much heat generated during the pigment paste producing. We have already begun to try to use this method in the daily production.

By the way, we have to know that not all bubbles need to be destroyed.Such as coffee, nearly all people who like coffee know that Italian coffee and fancy coffee are needed to add foam rich milk, because foam milk can bring a mellow taste for coffee. The making of milk foam is similar with the happen principle of pigment paste bubble.