Resins and base polymers.

Adhesives & Sealants Industry,  May, 2004  

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INTRODUCTION TO RESINS

The term resin comes from resinous, the description of materials that are amorphous, brittle, and yet soft and tacky. Rosin from trees is the easiest example to relate to--gymnasts and baseball pitchers use it for grip. Rosin derivatives form the oldest group of tackifier resins.

The term resin is sometimes used to describe materials like polyvinyl chloride (PVC) and acrylonitrile butadiene styrene (ABS), which do not fit the description used here for tackifier resins as follows:

* Low molecular weight, less than 20,000 Mz, typically less than 5,000 Mz; ...

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