Why does tackifying resin increase tack?

Tackifier resins refer to small molecular compounds that can improve the viscosity of rubber materials, especially the surface viscosity. Usually, the relative molecular mass of these small molecular substances is between several hundred and ten thousand, and they have a high glass transition temperature.

According to their sources and synthetic routes, they can be mainly divided into two categories: natural products and their derivatives and synthetic resins. Tackifying resin is mainly used for polymer modification, it is widely used in adhesives, coatings, inks and as rubber compound, asphalt modifier and polyolefin modifier.

Tackifying resin is one of the indispensable materials in the production process of rubber products and tires. A comprehensive understanding of tackifying resin is conducive to the selection of different types of raw materials according to different situations in production.

Generally speaking, natural series resins include rosin and terpene resins; synthetic series resins include polymer C5 petroleum hydrocarbon resins, C9 petroleum resins.

As polymer modifiers, tackifying resins are rarely used alone, but in most cases as a compounding agent to increase polymer adhesion, increase initial viscosity, and reduce operating or processing viscosity.