Poly(vinyl acetal) sheets exhibiting enhanced adhesion to inorganic surfaces
AssigneeSolutia Inc.
InventorsWeihong Cui, Steven V. Haldeman, Francois Andre Koran, Pu Zhang
Life of this patent
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Abstract
Resin layers and interlayers exhibiting enhanced adhesion to inorganic surfaces, such as glass, are provided. In some cases, the layers and interlayers may comprise at least one adhesion stabilizing agent for improving adhesion to various surfaces, even in the presence of moisture. Such layers and interlayers may be useful, for example, in multiple layer panels, such as, for example, safety glass used in automotive and architectural applications.
Claims14
An interlayer comprising:
- a layer comprising a poly(vinyl acetal) resin, wherein said resin layer exhibits a peel adhesion retention to glass of at least 25 percent after exposure to 95% relative humidity at 50° C. for 1 week.
An interlayer comprising a poly(vinyl acetal) layer having a moisture content of at least 1 weight percent, and wherein said layer exhibits a 90° peel adhesion of at least 5 N/cm after exposure to 95% relative humidity at 50° C. for week.
An interlayer sheet comprising a poly(vinyl acetal) resin and at least one silanol-containing adhesion stabilizing agent, wherein said sheet comprises one or more surface-treated locations exhibiting a silanol concentration gradient characterized by a surface concentration of elemental silicon that is greater than a mid-thickness concentration of elemental silicon.
Dependencies are inferred from the claim text.