Pressure sensitive adhesive, useful life

A number of higher poly(vinyl ether)s, in particular the ethyl and butyl polymers, have found use as adhesives. When antioxidants are incorporated, pressure-sensitive adhesive tapes from poly(vinyl ethyl ether) are said to have twice the shelf life of similar tapes from natural rubber. Copolymers of vinyl isobutyl ether with methyl acrylate and ethyl acrylate (Acronal series) and with vinyl chloride have been commercially marketed. The first two products have been used as adhesives and impregnating agents for textile, paper and leather whilst the latter (Vinoflex MP 400) has found use in surface coatings. 

Pressure-Sensitive Adhesives. Silicone PSAs are used primarily in specialty tape applications that require the superior properties of silicones, including resistance to harsh chemical environments and temperature extremes (398,399). Silicone PSAs are also used in applications requiring long service life, electrical insulation, and protection from moisture. Another distinctive advantage of silicone PSAs is their ability to wet low surface energy tape substrates such as PTFE. 

Uses Epoxy modifier esp. suited for use in wh. and pastel coatings, and in hot-melt, hot-melt pressure-sensitive, and pressure-sensitive adhesives improves intercoat adhesion, flow, formulation flexibility Features Regulates pot life... 

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