New silicone pressure-sensitive adhesive technology

Add time:09/03/2019    Source:sciencedirect.com

Useful silicone pressure-sensitive adhesives (PSAs) have been prepared from a newly developed high solids silicone technology. The platinum-catalysed silicone compositions consist of siloxane resin and hydrosilylation-reactive silicone fluids containing silicon-bonded vinyl and hydride functionalities. These high solids silicone compositions exhibit a manageable viscosity profile and cure at a rate proportional to the platinum level at temperatures as low as 100°C. The effect of the SiH to Si-vinyl stoichiometry ratio, the molar ratio of MH to DH, hydride crosslinker type and structure, and the chain length of the silicone oligomer on the peel and tack adhesive properties as well as the chain extension and branching hydrosilylation reactions were investigated.

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