초록 ▼

An integument which contributes to the maintenance of surface integrity is disclosed, particularly a sheet for use in preparing laminates, such as vehicle windshields, in which an energy absorbing ply, for example, a ply of poly(vinyl butyral), is sandwiched between two glass plies, the sheet of thi

An integument which contributes to the maintenance of surface integrity is disclosed, particularly a sheet for use in preparing laminates, such as vehicle windshields, in which an energy absorbing ply, for example, a ply of poly(vinyl butyral), is sandwiched between two glass plies, the sheet of this invention being applied to an exposed surface of one of the glass plies and having one surface layer comprising a thermoplastic polyurethane capable of adhering to a glass or plastic substrate and the other surface layer comprising a thermoset polyurethane having anti-lacerative, self-healing and anti-ablative properties; there is further disclosed the manufacture and application of such a sheet as a ply facing the interior of a vehicle, thereby forming a windshield the inwardly exposed surface of which comprises a thermoset polyurethane which protects the vehicle occupants from facial lacerations caused by windshield impact and which has self-healing properties.

대표청구항 ▼

A process for preparing a pre-formed flexible transparent polymeric sheet having optical properties, and effective for use as a ply in a glazing laminate, one surface of said sheet comprising a thermoplastic polyurethane which is substantially non-tacky at room temperature, but which itself is adhes

A process for preparing a pre-formed flexible transparent polymeric sheet having optical properties, and effective for use as a ply in a glazing laminate, one surface of said sheet comprising a thermoplastic polyurethane which is substantially non-tacky at room temperature, but which itself is adhesive under the influence of heat and pressure, and the other surface of said sheet comprising a self-healing thermoset polymeric material, comprising: (A) forming on a horizontal support a liquid film comprising a mixture of monomers from which said thermoset polymeric material is formed; (B) polymerizing said monomers to form a solid film of said thermoset polymeric material; and (C) forming on said solid thermoset film a solid film of said thermoplastic polyurethane.