UV Curable Low Tg Pressure Sensitive Adhesive Low Tack Formulation

Typical Formulation Ingredients

Ingredient

Parts by weight

Urethane acrylate oligomer (CN973H85 from Sartomer)

xxx

Ethoxylated nonyl phenol acrylate (CD504 from Sartomer)

xxxxx

Tackifier - C9 hydrocarbon resin (Norsolene S115 C9 from Cray Valley)

xx

Inhibitor - MEHQ (Aldrich Chemical Co.)

xxx

Antioxidtant - Irganox 1010 (Ciba-Geigy Co.)

x

Photo-initiator - Esacure KIP100F (Lamberti, USA, Inc.)

xx

2(2-ethoxy ethoxy) ethyl acrylate (SR 256 from Sartomer)

xxxxx

(Source: Sartomer Company)

Typical Properties

Properties

Viscosity at 25°C, cps

xxx

Tg, °C

xxx

Processing

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Resulting Properties

The above table shows a starting formulation for a general purpose UV cured pressure sensitive adhesive having a low Tg. Upon curing, these adhesives offer a non-tacky film that provides excellent adhesive strength to a number of different substrates. However, when a specific application requires laminating opaque substrates, EB-curing adhesives may be necessary, since EB cure is not negatively affected by an opaque substrate.

Tips and Tricks

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UV Curable Low Tg Pressure Sensitive Adhesive - Low Tack Formulation

Applicable Base Polymer Properties