The popularization of PVC film tackifier is added to the modified asphalt to wet the bonding surface through surface diffusion or internal diffusion to increase the bonding strength between the modified asphalt and the adhered material. Tackifiers mainly include inorganic salt electrolytes and organic tackifiers.
Although natural rubber is sticky, the adhesive strength of adhesives produced by rubber alone is still insufficient for many applications. Most commercial synthetic elastomers lack stickiness, either on themselves or on other surfaces. Therefore, to increase their viscosity, resin tackifiers are added. A large number of latex and solvent systems, especially when used as contact adhesives, must use specific types of tackifying resins.
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