Typical Formulation Ingredients
Ingredient
Parts by weight
Low molecular weight polyisobutylene
Typical Properties
Softening point, ring and ball, °C
Resulting Properties
PIB resins are used in adhesive formulations generally because of their resistance to aging and to attack by chemicals. They are used in pressure sensitive adhesives for technical and medical applications, such as surgical tapes, sealing tapes, insulating tapes, masking tapes, and anticorrosion tapes.
Many pressure sensitive tape products are formulated with polyisobutylene resins as the base polymer. These products remain permanently tacky. The table above provides a formulation for a solvent borne pressure sensitive label adhesive. PIB pressure sensitive adhesives can either be applied via solvent solution or hot melt application due to their permanent state of tack.