Preparation and Characterization of UV-Crosslinkable Pressure-Sensitive Adhesives

Preparation and Characterization of UV-Crosslinkable Pressure-Sensitive Adhesives 

Pressure-sensitive adhesives (PSAs) are used in various forms for packaging, medical and masking tapes and labels. PSAs are viscoelastic materials that exhibit sohd-like and liquid-like behavior so that their performance can be evaluated by tack (the capability of a PSA to adhere instantly under light pressure), peel strength (the tensile force required to remove a PSA) and shear strength (flow resistance) [1, 2]. 

The techniques used in manufacturing PSAs are solution and emulsion polymerization and hot-melt process. In general, acrylic PSAs are produced by solu- 

Adhesion - Current Research and Application. WulfFPossart Copyright (g) 2005 WILEY-VCH Verlag GmbH Co. KGaA, Weinheim ISBN 3-527-31263-3 

The main areas of research into UV-polymerizable PSAs are type, molecular weight, polarity, glass transition temperature (Tg), functionahties, and blending ratio of oligomers and monomers. Photoinitiator type (type I or type II) and kinds of tackifiers are also considered in the manufacture of PSA. As a type I 

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I 7 7 Preparation and Characterization of UV-Crosslinkable Pressure-Sensitive Adhesives... 

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