A primer composition, comprising: (A) an organosilicon compound having in its molecule i) at least one hydrogen atom bonded to a silicon atom and ii) at least one group selected from silicon-bonded alkoxy groups and silicon-bonded and epoxy group-containing organic groups; and (B) an organic titanium compound. This composition can achieve a durable adhesion even under severe conditions as in high-temperature air, high-temperature water vapor, and high-temperature oil.
A titanate/organosilane copolymer is disclosed for use as a primer to promote adhesion between a rigid polymer substrate and an elastomeric interlayer or inorganic coating, or as a release agent to prevent such adhesion depending on the nature of the organic moiety of the organosilane.
An aircraft windshield transparency includes a base frame defining an opening into which an inboard-positioned transparency is mounted with at least one outboard-positioned transparency and an interlayer between the two transparencies. The interlayer exhibits a stronger adhesion to the outboard transparency than to the inboard transparency. The peripheries of the outboard transparency and interlayer carry a means which functions to expose a groove penetrating to the surface of the inboard transparency such that the outboard transparency and interlayer may be removed and the inboard transparency thereafter functions as the primary windshield transparency of the aircraft.
The present invention relates to an aircraft transparency including an electroconductive metal oxide coating over a rigid plastic substrate, and a polyurethane protective liner over the metal oxide coating, and more specifically to the use of a primer for adhering the metal oxide coating to the substrate and/or a primer for adhering the polyurethane protective liner to the metal oxide coating. The metal oxide primer includes a carbonate diol-based crosslinked polyurethane. The polyurethane primer is selected from the group consisting of a crosslinked copolymer of acrylic acid and substituted acrylates such as 2-ethylhexylacrylate; a crosslinked copolymer of cyanoethylacrylate and acrylic acid; and a crosslinked terpolymer of 2-ethylhexylacrylate, cyanoethylacrylate and acrylic acid.
An enhanced acrylic for use in transparencies that provides an effective barrier to airborne environmental chemical agents that are known to craze standard stretched acrylics.
