Energy savings plus mechanical reinforcement and rheology control

Hot Melt Polyisobutene PSA for Skin Application

Adhesives Formulation

Applicable Type

Hot-melt Adhesives

Applicable Base Polymer

Polyisobutylenes (PIB)

Applicable Industrial Sectors

Wound & Skin care

Applicable Base Polymer Properties

PIB has long been used as a basic substance in the compounding of pressure-sensitive adhesives (PSAs).

Relative to other known elastomers, synthetic polymers based on isobutylene offer a number of advantages. Owing to their synthetic production, they are free of unwanted ingredients and due to their complete saturation they are highly stable to oxidation.

PIBs are not a skin irritant and adhesives used in medicine (e.g., surgical tape adhesive, transdermal systems) are usually based on PIBs.

Typical Formulation Ingredients

Phase

Ingredient

Parts by weight

Polyisobutene (Vistanex PIB MM L-120, BASF)

xxx

Plasticizer (Hercolyn D, Pinova)

Plasticizer (Piccolyte S115, Pinova)

Polybutene (Parapol 950, BASF)

Typical Properties

Properties

Good adhesion to skin

Non-irritating

Excellent water resistance

Good package stability and adhesion

Processing

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Resulting Properties

Isobutene adhesives are known for excellent adhesion to most substrates and good water resistance. However, they can stain adjacent surfaces and have relatively poor recovery from extension. The polymeric compositions along with the other additives will affect both the application and the ultimate performance properties of the joint.

This formulation has the following characteristics:

Good adhesion to skin
Non-irritating
Excellent water resistance
Good package stability and adhesion

(Source: Willenbacher, N., Chapter 4 in Technology of Pressure Sensitive Adhesives and Products)