Лако-красочные материалы — производство

The adhesion or performance of nonpolar elastomers to various substrates can be increased by the addition of a tackifier resin. The tackifier modifies the elastomer by improving wettability, modifying the viscoelastic properties, and increasing polarity. Tackifier resins are susceptible to thermooxidative degradation. It is not uncommon for tackifier resins to degrade rapidly at room temperature. The integrity of the tackifier resin is very important to the final properties of an adhesive formulation. Tackifier resins must be effectively stabilized to prevent degradation during storage in order to maintain their properties until production of the adhesive formulation. Degradation leads to changes in both the chemical and physical properties of the tackifier, such as compatibility, melt viscosity, and discoloration. The mechanism of tackifier oxidation follows the autooxida­tion as outlined in Table 1. The degradation of tackifiers can be followed by determining the hydroperoxide formation, color development, and viscosity changes during static oven aging at warehouse storage temperatures.