Abstract: Thermoplastic molding compositions comprising blends of a block polysiloxane--polycarbonate copolymer and a polyamide resin are useful for extruding articles such as films.

Abstract: Poly(carbonate-siloxane) copolymers having reduced tendencies to burn are provided by the addition of an aromatic sulfone sulfonate thereto. These materials find utility in electrical applications.

Abstract: A laminate structure for acoustical applications which comprises a porous, flexible, non-woven, needle punched mat of inherently non-burning, fine glass or other material fibers affixed as a facing to a sound absorbing, flame retardant, flexible backing such as a layer of open cell foam or a mat of glass or mineral fibers. The invention also contemplates the method of manufacture of such a laminate structure. Depending upon the materials used therefor, the facing and the backing may be joined together by needle punching and subsequent chemical bonding, chemical bonding, flame bonding and, in the case of an open cell foam backing, the backing may be foamed in place on the facing forming an intimate bond therewith.