The present invention provides pneumatic tires which have reduced changes in hardness over time and which provide improved abrasion resistance while ensuring good durability. The present invention relates to a pneumatic tire formed from a rubber composition, the rubber composition containing: a rubber component including a hydrogenated copolymer containing a structural unit derived from an aromatic vinyl compound and a structural unit derived from a conjugated diene compound; and a liquid polymer having a number average molecular weight of 2,500 to 500,000, the hydrogenated copolymer being present in an amount of 80% by mass or less based on 100% by mass of the rubber component, the liquid polymer being present in an amount of 1 to 50 parts by mass per 100 parts by mass of the rubber component.

The present invention is directed to a pneumatic tire having a tread comprising a vulcanizable rubber composition comprising, based on 100 parts by weight of elastomer (phr), (A) from about 40 to about 90 phr of a solution polymerized styrene-butadiene rubber having a glass transition temperature (Tg) ranging from −40° C. to 0° C.; (B) from about 60 to about 10 phr of polybutadiene; and (C) from 5 to 50 phr of a hydrocarbon resin having a Tg ranging from −40° C. to 20° C.; (D) optionally, a rubber process oil (E) optionally, a hydrocarbon resin having a Tg ranging above 20° C.
wherein the total amount of hydrocarbon resins and oils is less than 65 phr, and the weight ratio of silica to the total of hydrocarbon resins and oils is greater than 2. (F) from 70 to 130 phr of silica.

The present invention is directed to a pneumatic tire having a tread comprising a vulcanizable rubber composition comprising, based on 100 parts by weight of elastomer (phr), (A) from about 40 to about 90 phr of a solution polymerized styrene-butadiene rubber having a glass transition temperature (Tg) ranging from −40° C. to 0° C.; (B) from about 60 to about 10 phr of polybutadiene; and (C) from 5 to 50 phr of a hydrocarbon resin having a Tg ranging from −40° C. to 20° C.; (D) optionally, a rubber process oil (E) optionally, a hydrocarbon resin having a Tg ranging above 20° C.
wherein the total amount of hydrocarbon resins and oils is less than 65 phr, and the weight ratio of silica to the total of hydrocarbon resins and oils is greater than 2. (F) from 70 to 130 phr of silica.

The present invention aims to provide rubber compositions and tires which provide improved overall performance in terms of wet grip performance, dry grip performance, and fuel economy. The present invention relates to a rubber composition having a hardness that reversibly changes with water and satisfying the following relationships (1) and (2):

Hardness when dry−Hardness when water-wet≥1  (1)

wherein each hardness represents the JIS-A hardness at 25° C. of the rubber composition; and

tan δ at 70° C. when dry<0.14  (2)

wherein the tan δ at 70° C. represents the loss tangent measured at 70° C., an initial strain of 10%, a dynamic strain of 2%, and a frequency of 10 Hz.

The present invention aims to provide rubber compositions and tires which provide improved overall performance in terms of wet grip performance, dry grip performance, and fuel economy. The present invention relates to a rubber composition having a hardness that reversibly changes with water and satisfying the following relationships (1) and (2):

Hardness when dry−Hardness when water-wet≥1  (1)

wherein each hardness represents the JIS-A hardness at 25° C. of the rubber composition; and

tan δ at 70° C. when dry<0.14  (2)

wherein the tan δ at 70° C. represents the loss tangent measured at 70° C., an initial strain of 10%, a dynamic strain of 2%, and a frequency of 10 Hz.

The invention relates to a pneumatic vehicle tire having an inner liner composed of a sulfur-crosslinked rubber mixture containing 80 to 100 phr (parts by weight, based on 100 parts by weight of all rubbers in the mixture) of at least one butyl rubber and/or halogenated butyl rubber, at least one filler, 1 to 60 phr of at least one coumarone-indene resin and 1 to 60 phr of at least one aliphatic hydrocarbon resin, wherein the total mass of coumarone-indene resin and aliphatic hydrocarbon resin does not exceed 65 phr.

The invention relates to a pneumatic vehicle tire having an inner liner composed of a sulfur-crosslinked rubber mixture containing 80 to 100 phr (parts by weight, based on 100 parts by weight of all rubbers in the mixture) of at least one butyl rubber and/or halogenated butyl rubber, at least one filler, 1 to 60 phr of at least one coumarone-indene resin and 1 to 60 phr of at least one aliphatic hydrocarbon resin, wherein the total mass of coumarone-indene resin and aliphatic hydrocarbon resin does not exceed 65 phr.

Dry liquid concentrates allow carbon nanotubes to be dispersed in various mediums under standard composite processing conditions. The incorporation of carbon nanotubes can enhance the physical properties of the resulting material, such as, for example, improving the anti-corrosive properties of thermosets if present, and/or improving electrical properties of transitional metal oxide composites.

Dry liquid concentrates allow carbon nanotubes to be dispersed in various mediums under standard composite processing conditions. The incorporation of carbon nanotubes can enhance the physical properties of the resulting material, such as, for example, improving the anti-corrosive properties of thermosets if present, and/or improving electrical properties of transitional metal oxide composites.

The present disclosure relates to a curable pressure sensitive adhesive composition comprising: a) a butyl rubber component in an amount greater than 40 wt %; b) a tackifier in an amount greater than 1 wt %; c) a multifunctional crosslinking agent comprising at least two nitroso functional groups; and d) optionally, a hydrocarbon plasticizer; wherein the weight percentages are based on the total weight of the curable pressure sensitive adhesive composition. In another aspect, the present disclosure is directed to a method for protecting an electronic device or an electronic component from moisture and air permeation, wherein the method comprises the step of using a pressure sensitive adhesive composition as described above. According to still another aspect, the present disclosure is directed to the use of a pressure sensitive adhesive composition as described above for manufacturing an electronic device.