Abstract: Laminar structures useful as road signs, markers, informational signs and the like comprised of:(i) a modified thermoplastic polyester core structure; and(ii) a front light reflective layer disposed on and laminated to said core structure.

Abstract: A laminar polycarbonate resin structure comprising a polycarbonate resin core lamina, an ultraviolet radiation absorbing back lamina bonded to the rear face of said core lamina, and a light reflecting front lamina bonded to the front face of said core lamina. This laminar structure is useful for making road signs and markers.

Abstract: Improved impact or shock resistant laminates comprising a plurality of laminae including a back polycarbonate lamina opposite the direction of impact or shock, such polycarbonate lamina having a relatively brittle overlying or exposed layer or coating opposite the direction of impact, are provided by controlling the thickness of the coated polycarbonate layer opposite the impact or shock receiving surface, such control reducing failure and spalling of the polycarbonate surface opposite the impact or shock receiving surface.

Abstract: Improved impact or shock resistant laminates comprising a plurality of lamina including a back polycarbonate lamina opposite the direction of impact or shock, such back polycarbonate lamina having a relatively hard and brittle overlying or exposed layer or coating opposite the direction of impact, are provided by interposing intermediate layer between said hard and brittle exposed layer and the polycarbonate lamina which intermediate layer is softer and less brittle than said exposed layer, such intermediate layer reducing failure and spalling of the polycarbonate surface opposite the impact or shock receiving surface.

Abstract: An improved impact resistant double glazed structure comprising a back laminate positioned opposite the direction of impact, said back laminate comprising a plurality of laminae selected from polycarbonate, glass and solid resinous materials, and a front glass laminate positioned forward of said back laminate comprising a plurality of glass laminae, including a relatively thin front glass lamina facing the direction of impact having a thickness of from about 30 to about 220 mils, a relatively thin back glass lamina opposite the direction of impact having a thickness of from 30 to about 220 mils, and a relatively thicker glass core positioned intermediate said relatively thin back and front glass laminae.

Abstract: Flexible, biologically compatible, optically non-opaque and x-ray opaque tubing for use as a catheter comprised of an organopolysiloxane-polycarbonate terpolymer.

Abstract: Improved impact or shock resistant soft coated laminates including a back polycarbonate lamina opposite the direction of impact or shock, such polycarbonate lamina having a soft overlying or exposed layer or coating opposite the direction of impact, are provided. The laminates exhibit excellent resistance to failure and spalling of the polycarbonate surface opposite the impact or shock receiving surface.The soft coat is a self-healing, chemically resistant polyurethane having an excess of free hydroxyl groups over isocyanate groups and confers on the laminates excellent scratch resistance, good resistance against swelling and stress cracking while at the same time the laminates exhibit good clarity and integrity in addition to good chemical and permeation resistance, as well as resistance to failure and spalling. The process employs the polyurethane in film form as a cap sheet.

Abstract: Polysiloxane-polycarbonate block copolymers provide ductile, structural adhesive layers for bonding laminates. They are particularly useful as an adhesive and structural element in preparing polycarbonate containing composites which retain their integrity. Laminates of glass, polycarbonate, other resins separately and in various combinations and the adhesive layer provide glazing and structural units of relatively light weight and thickness which have good energy absorption, clarity, strength and integrity and are penetration resistant over a wide range of temperatures.