Application of Queer coating additives in cathode electrophoresis paint (CED).

Cathode electrophoresis paint
is a relatively special coating method, is a conductive material (such as automotive body, automotive metal accessories, metal parts, etc.) immersed in a coating tank filled with water dilution, low concentration of water, as cathode, in addition to the groove set a corresponding anode, direct current between the poles, in the cathode-connected coating parts evenly predisulate a layer of water insoluble coating film.
cathode electrophoretic paint compared to other spray, brushing and other coating formulations have the following characteristics:
, the liquid constantly recycled, the object is constantly immersed / removed from the electrophoresis tank, easy to foam after a long time, the need for efficient de-foaming agent


. . . cathode electrophoretic paint features
. . . tank fluid needs to pass through the ultrafiltration membrane, in order to eliminate the foam in the cleaning tank, defrost agent needs to be able to pass through the ultrafiltration membrane
. . . cathode electrophoretic paint characteristics
. . . after a long cycle, the pigment is easy to sink, need to choose a dispersant that helps to prevent subsiding
. . . cathode electrophoretic paint characteristics
variety of needs, it is difficult to surface? NoNoNo! See how Ingtron's multi-purpose additives face the challenge!
For cathode electrophoretic paint defrosting agent selection
Because most of the cathode electrophoretic paint formula is water, electrophoretic paint concentration, viscosity is low, its choice of debugants put forward a high demand, not only have a strong debug capacity, but also need to have excellent compatible, but also penetrate the ultrafiltration membrane to reduce the foam in the cleaning tank.
Compared with the traditional desiccant is the use of de-foaming agent and coating system incompatible and de-foaming, Creating paint additives glycol series de-foaming agent is the use of its unstable bubble structure and de-foaming, while in the water-based formula has excellent compatible, especially suitable for electrophoretic paint applications . Such as SURFYNOL ® 104 series, SURFYNOL ® DF110 series has been widely used in electrophoresis paint.
's recently launched new product, SURFYNOL® 118, is a extension of the product line of the glycol series of defrosting agents, which has a stronger deblistering capacity compared to the above two series (see figure below for lower foam height), while maintaining considerable compatible, providing more options for optimizing defrosting agents in electrophoretic paints.
Different additives in the paint formulation foam height of the
and the twin structure of SURFYNOL® 104, SURFYNOL® 118 can effectively reduce the dynamic surface pressure of the coating formula, giving the coating excellent deblistering performance at the same time, with better wetting performance, is a multi-functional coating additive.
Dynamic surface stress of different additive aqueous solutions (0.1% aqueous solution)
for cathode electrophoresis paint dispersant selection
cathode electrophoretic paint viscosity is low, in the electrophoresis tank after a relatively long period of operation will appear pigment subsidion, need to choose the appropriate dispersant to help the pigment stable in electrophoretic paint.
Because the resin in electrophoresis paint belongs to the cation system, it is necessary to avoid polymer dispersants containing anion stability when selecting dispersants, generally mainly non-ion or cation system dispersants.
Created coating additives provide different types of dispersants for use in electrophoretic paint, a non-ion type ZETASPERSE ® 179, CARBOWET® GA221, which belongs to polyether dispersants, can effectively improve the stability of pigments in electrophoretic paint, to prevent subsidion.
The other is ZETASPERSE® 170, a dispersant containing serotonin, which is supplied in the form of a non-ionic dispersant, which is present in an acidic system (e.g. cathode electrophoresis paint) in the form of cations to help improve the stability of the pigment.
anti-sinking properties of different dispersants in electrophoretic paint formulations
.