Flame retardant thermoplastic films and methods of making the same
AssigneeGeneral Electric Company
InventorsRobert Gallucci, William Kernick, Jeroen Vervoort
Life of this patent
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Abstract
A film can comprise greater than or equal to about 95 wt % thermoplastic resin and about 0.001 wt % to about 5.0 wt % sulfonate salt, based on a total weight of the film, and have a UL-94 rating of VTM-0, wherein the thermoplastic resin is selected from the group consisting of polyimide, polysulfone, and copolymers, reaction products, and combinations comprising at least one of the foregoing thermoplastic resins.
Claims28
A film, comprising:
- greater than or equal to about 95 wt % thermoplastic resin, based on a total weight of the film, wherein the thermoplastic resin is selected from the group consisting of polyimide, polysulfone, and copolymers, reaction products, and combinations comprising at least one of the foregoing thermoplastic resins;
- about 0.001 wt % to about 5.0 wt % sulfonate salt, based on the total weight of the film;
- and
- a UL-94 rating of VTM-0.
A film, comprising the reaction product of:
- greater than or equal to about 95 wt % thermoplastic resin, based on a total weight of the film, wherein the thermoplastic resin is selected from the group consisting of polyimide, polysulfone, and copolymers, reaction products, and combinations comprising at least one of the foregoing thermoplastic resins;
- and
- about 0.001 wt % to about 5.0 wt % sulfonate salt, based on the total weight of the film;
- and
- wherein the film has a UL-94 rating of VTM-0 for film thicknesses of 50 micrometers to 200 micrometers.
A method for producing a film, comprising:
- melting a thermoplastic resin and a sulfonate salt to form a melt, wherein the thermoplastic resin is selected from the group consisting of polyimide, polysulfone, and copolymers, reaction products, and combinations comprising at least one of the foregoing thermoplastic resins, and wherein the thermoplastic resin is present in an amount of greater than or equal to about 95 wt %, and the sulfonate salt is present in an amount of about 0.001 wt % to about 5.0 wt %, based upon the total weight of the melt;
- and
- passing the melt through a die to produce the film.
A method for producing a thermoplastic film using melt processing, comprising:
- melting a thermoplastic resin to form a melt;
- applying a sufficient vacuum to the melt to reduce a film total flame out time, determined in accordance with UL-94, by greater than or equal to about 10 seconds as compared to an original total flame out time attained from a film having the same composition and an application of a vacuum of greater than or equal to 250 mbar;
- and
- passing the melt through a die to produce the film.
Dependencies are inferred from the claim text.