Applications of polymeric emulsion thickeners

Folllowings are applications of polymeric emulsion thickeners:
1, Double-sided adhesive, the recommended addition amount is 1-3%
2, Pressure-sensitive adhesive emulsion, the recommended amount of addition is 0.5-1%
3, Water-based ink, the recommended amount of addition is 0.5-1%
4, Water-based laminating adhesive, the recommended addition amount is 0.2-0.5%.

The nature and dissolving power of the solvent are different, which have a great influence on the adsorption form, adsorption amount, and adsorption chain ratio of the polymer on the surface of the pigment particles. In a dispersion system with the same polymer and pigment but different solvents, the adsorption of the polymer on the surface of the pigment particles is different. The amount of adsorption per unit area of ​​the pigment, good solvent<poor solvent; thickness of the adsorption layer, good solvent>poor solvent; ratio of adsorbed chain links, good solvent>poor solvent. Therefore, when using polymer dispersants, you must pay attention to the compatibility of the resin solution and the dispersant. Not only this, but also the compatibility of the resin solids and the dispersant solids after the solvent volatilizes. If the compatibility is not good, it will Affects gloss, merco pe wax adhesion, etc., and adversely affects coating performance.

Not only the solubility of the solvent has an impact on the adsorption of the pigment, but also the solvent will compete with other components of the coating for adsorption on the surface of the pigment.

Coating is a multi-phase system, resins, solvents, and additives will produce competitive adsorption on the surface of the pigment. For the convenience of description, the formula is now used as an example to illustrate. R stands for resin or high molecular polymer; P stands for pigment; S stands for solvent.