Coagulants, Fixing Agents & Anionic Trash ...

TGcat Series - Coagulants, Fixing Agents & Anionic Trash Catchers Many functional materials for paper in acidic and neutral conditions have cationic groups to be retained on pulp. These materials are usually cationic starch, wet strength resins, sizes, size fixators, retention and drainage aids, etc. Anionic trash catchers play the role of colloid chelatents and allow a perfect action of these cationic groups on the fibers, especially in the case of thermochemical pulps (TMP) where the recirculation of the coated broke causes high concentration of anionic substances. The purpose of TGcat series is to avoid the cationic functional chemicals like a cationic starch to be caught by the colloids (instead of reacting with the fibers). The addition of a low molecular weight, highly cationic polymer enables the neutralization and blocking of the anionic trash and allows the cationic starch to be fixed onto the fibers. In this way the physical properties of the resultant paper are improved. In this case, liquid polymers such as TGcat series are the most effective as anionic trash catcher. With TGcat, the fixation of cationic functional polymers is easier on the fiber when the anionic compounds present in the papermaking system. 'Charge neutralization flocculation' is basically a special case of the patch-charge model. It can be explained that the electrical charge at the interface will be cancelled out by ion exchange with polycations in stoichiometric proportions, and flocculation comes about by means of Van der Waals forces between uncharged particles. This mechanism is plausible in situations in which a polycationic compound forms a nonionic polyelectrolyte complex with a polyanionic species. Therefore, TGcat series, which has low molecular weight with high cationic charge density, helps to the fast dewatering of water by flocculation through the charge neutralization. 1. Typical Properties   TGcat-DW10 Active content(%) 48.0~52.0 Bulk viscosity(cps, 25°C) 500~1,000 Specific gravity(Ave.) 1.12~1.16 pH 4.0~7.0 Charge density Very high Storage temp.(°C) 0~35 Freezing point(°C) 0~35 Shelf life(months) 6 2. Packaging Plastic pails Metalic drums Schutz container Other sizes 20kg 200kg 1,000kg - 3. Heath and Safety Toxicity, caused by TGcat products alone and when incorporated into papers and paperboards, has not been reported so far. However, contact with the TGcat solution should be avoided because of its acidic nature. When exposed to the solutions, wash with fresh water immediately. These data are given for information only. They do not constitute a specification and no liability is assumed, nor freedom from any existing patents.We do not guarantee the applicability or the accuracy of this information and the suitability of our products in any given situation, since we cannot anticipate the many different conditions under which our products may be used.