As the sealant material composition forming a sealant layer of a pneumatic tire provided with the sealant layer on a tire inner surface, the sealant material composition prepared by blending from 0.1 parts by mass to 20 parts by mass of a crosslinking agent, from 0.1 parts by mass to 40 parts by mass of an organic peroxide, and from 10 parts by mass to 400 parts by mass of a liquid polymer per 100 parts by mass of a butyl rubber is used.

The present invention is directed to a method making a pneumatic tire, comprising the steps of: mixing a sealant composition comprising an elastomer, a filler, a diluent, a quinoid curing agent, an oxidant co-curative; and a cure modifier of formula 1: ##STR00001##
wherein R.sup.1 and R.sup.2 are independently H or C1 to C4 alkyl, or R.sup.1 and R.sup.2 taken together form a substituted or unsubstituted phenylene group; R.sup.3 and R.sup.4 are independently H, NH.sub.2, C1 to C4 alkyl, or OR.sup.5 where R.sup.5 is C1 to C4 alkyl, with the proviso that when R.sup.1 and R.sup.2 are taken together to form a substituted or unsubstituted phenylene group, R.sup.5 is C1 to C3 alkyl; applying the sealant composition to an inner surface of a cured tire; and curing the sealant composition.

An improved method for manufacturing a continuous self-healing barrier film is provided. The method includes slot-die coating opposing sides of a separator substrate with a curing agent slurry and a curable resin slurry using a single-sided coating line or a tandem coating line. The method also includes sequentially interleaving inner and outer protective layers via a continuous roll-to-roll process to create a multi-layered barrier film. The barrier film can optionally be formed into a barrier envelope, and an insulating core material can be inserted into the barrier envelope to define an enclosure. Evacuating and sealing the enclosure along a perimeter of the barrier envelop forms a self-healing vacuum insulation panel with excellent properties for use as a building material and in refrigeration systems, for example. The barrier film can alternatively be used in the manufacture of tires, roofing, cargo containers, food packaging, and pharmaceutical packaging, for example.

An improved method for manufacturing a continuous self-healing barrier film is provided. The method includes slot-die coating opposing sides of a separator substrate with a curing agent slurry and a curable resin slurry using a single-sided coating line or a tandem coating line. The method also includes sequentially interleaving inner and outer protective layers via a continuous roll-to-roll process to create a multi-layered barrier film. The barrier film can optionally be formed into a barrier envelope, and an insulating core material can be inserted into the barrier envelope to define an enclosure. Evacuating and sealing the enclosure along a perimeter of the barrier envelop forms a self-healing vacuum insulation panel with excellent properties for use as a building material and in refrigeration systems, for example. The barrier film can alternatively be used in the manufacture of tires, roofing, cargo containers, food packaging, and pharmaceutical packaging, for example.

A system (1) for applying a sealing agent to the surface (5) of an internal cavity (2) of a pneumatic tyre (3) provided with an applicator device (12) for supplying a strip of sealing agent that is applied to the surface (5) and an opto-electronic device (4*; 20) that is integral to the nozzle (18) of the applicator device (12) and that is provided with at least one sensor element (9*; 20) that is able to acquire a plurality of images of the surface (5) and to provide a plurality of signals that are indicative of said plurality of acquired images; and an electronic processing system (11) connected to the opto-electronic device (4*; 20), and to the applicator device (12) and configured so as to acquire the signals that are indicative of the plurality of images acquired by the opto-electronic device (4*; 20); and to control the application of the sealing agent as a function of the plurality of signals that are indicative of the plurality of images acquired by the opto-electronic device (4*; 20).

A system (1) for applying a sealing agent to the surface (5) of an internal cavity (2) of a pneumatic tyre (3) provided with an applicator device (12) for supplying a strip of sealing agent that is applied to the surface (5) and an opto-electronic device (4*; 20) that is integral to the nozzle (18) of the applicator device (12) and that is provided with at least one sensor element (9*; 20) that is able to acquire a plurality of images of the surface (5) and to provide a plurality of signals that are indicative of said plurality of acquired images; and an electronic processing system (11) connected to the opto-electronic device (4*; 20), and to the applicator device (12) and configured so as to acquire the signals that are indicative of the plurality of images acquired by the opto-electronic device (4*; 20); and to control the application of the sealing agent as a function of the plurality of signals that are indicative of the plurality of images acquired by the opto-electronic device (4*; 20).

A method and a system (1) for applying a sealing agent to the surface (5) of an internal cavity (2) of a pneumatic tyre (3) provided with an optoelectronic device (4) provided with at least one sensor element (9) that is able to acquire a plurality of images of the entire surface (5) and to provide a plurality of signals that are indicative of the plurality of captured images; an electronic processing system (11) connected to the optoelectronic device (4) and configured in such a way as to acquire the signals that are indicative of the plurality of captured images and to process them in order to determine the surface profile of the entire internal cavity (2) as a function of the respective images; and an applicator device (12) intended to apply a strip of sealing agent to the surface (5); wherein the applicator device (12) is connected to the electronic processing system (11), which is configured in such a way as to drive the applicator device (12) as a function of the surface profile of the entire internal cavity (2).

A method and a system (1) for applying a sealing agent to the surface (5) of an internal cavity (2) of a pneumatic tyre (3) provided with an optoelectronic device (4) provided with at least one sensor element (9) that is able to acquire a plurality of images of the entire surface (5) and to provide a plurality of signals that are indicative of the plurality of captured images; an electronic processing system (11) connected to the optoelectronic device (4) and configured in such a way as to acquire the signals that are indicative of the plurality of captured images and to process them in order to determine the surface profile of the entire internal cavity (2) as a function of the respective images; and an applicator device (12) intended to apply a strip of sealing agent to the surface (5); wherein the applicator device (12) is connected to the electronic processing system (11), which is configured in such a way as to drive the applicator device (12) as a function of the surface profile of the entire internal cavity (2).

Self-healing compositions, method of preparation and uses thereof are disclosed. In an example, a self-healing composition includes a first microcapsule and a second microcapsule. The first microcapsule includes a first polydimethylsiloxane resin, a first silicone fluid, a first functionalized alkoxysilane, and a catalyst capable of catalyzing hydrosilylation reactions, and the second microcapsule includes a second polydimethylsiloxane resin, a second silicone fluid, a second functionalized alkoxysilane, and a hydrogen-terminated dimethyl siloxane resin. In this way, the self-healing composition releases and mixes contents of the first microcapsule and the second microcapsule upon the rupture thereof, imparting a passively initiated repair process to the self-healing composition.

Self-healing compositions, method of preparation and uses thereof are disclosed. In an example, a self-healing composition includes a first microcapsule and a second microcapsule. The first microcapsule includes a first polydimethylsiloxane resin, a first silicone fluid, a first functionalized alkoxysilane, and a catalyst capable of catalyzing hydrosilylation reactions, and the second microcapsule includes a second polydimethylsiloxane resin, a second silicone fluid, a second functionalized alkoxysilane, and a hydrogen-terminated dimethyl siloxane resin. In this way, the self-healing composition releases and mixes contents of the first microcapsule and the second microcapsule upon the rupture thereof, imparting a passively initiated repair process to the self-healing composition.