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 80 to about 20 phr of a solution polymerized styrene-butadiene rubber having a glass transition temperature (Tg) ranging from 85 C. to 50 C.; (B) from about 20 to about 80 phr of natural rubber; and (C) from 30 to 70 phr of a process oil; (D) from 70 to 150 phr of silica;
wherein the weight ratio of silica to oil is less than 2.2.

Disclosed are compositions comprising a liquid carrier, a polysulfide rubber curing agent, a metal cation, and an ionic liquid. Also disclosed are methods for curing a surface of an uncured polysulfide rubber. These methods involve applying the disclosed compositions to the surface of the uncured polysulfide rubber.

Disclosed are compositions comprising a liquid carrier, a polysulfide rubber curing agent, a metal cation, and an ionic liquid. Also disclosed are methods for curing a surface of an uncured polysulfide rubber. These methods involve applying the disclosed compositions to the surface of the uncured polysulfide rubber.

A support assembly for a vehicle travels along a road surface and rotates relative to the road surface and the vehicle. The first support assembly includes a spherical tread layer for contacting the road surface, a foam layer adjacent the spherical tread layer, the foam layer including adjustable elements for altering an outer physical contour of the spherical tread layer, the outer physical contour contacting the road surface, a spherical wheel/tire for supporting the spherical tread layer and the vehicle, and a drive system magnetically driving rotation of the spherical wheel/tire relative to the vehicle such that no portion of the spherical tread layer physically contacts the vehicle.

The present invention provides a cap tread rubber composition and a pneumatic tire formed from the rubber composition which are excellent in grip performance and abrasion resistance during high speed running. Provided is a cap tread rubber composition, containing: styrene butadiene rubber and/or polybutadiene rubber; an isoprene-based rubber; a filler; and a plasticizer, the rubber composition containing, based on 100% by mass of a rubber component therein, at least 90% by mass in total of the styrene butadiene rubber and/or polybutadiene rubber and 0.3% to 10% by mass of the isoprene-based rubber, the filler including, based on 100% by mass thereof, at least 80% by mass of silica, the rubber composition containing, per 100 parts by mass of the rubber component, at least 110 parts by mass of the silica and at least 50 parts by mass of the plasticizer.

Disclosed is a latex composition for dip-molding and a dip-molded article produced therefrom. More specifically, a dip-molded article having slow syneresis, less stickiness and superior tensile strength is produce by dip-molding of a carbonic acid-modified nitrile-based copolymer latex having increased molecular stability due to the combined use of alkenylsuccinate, which is an emulsifier crosslinkable with the latex and having a flexible molecular structure.

Disclosed is a latex composition for dip-molding and a dip-molded article produced therefrom. More specifically, a dip-molded article having slow syneresis, less stickiness and superior tensile strength is produce by dip-molding of a carbonic acid-modified nitrile-based copolymer latex having increased molecular stability due to the combined use of alkenylsuccinate, which is an emulsifier crosslinkable with the latex and having a flexible molecular structure.

A silane-modified copolymer comprising constituent units of butadiene, constituent units having a hydrolyzable silyl group, and constituent units having acid anhydride functionality is low volatile because of its molecular weight. It may be synthesized from relatively inexpensive reactants.

A compatibilizer and thermoplastic resin employing the same are provided. The compatibilizer includes about 100 parts by weight of polyolefin having at least one reactive functional group, and about 80-120 parts by weight of a copolymer, wherein the copolymer has x number of repeat units represented by

##STR00001##

y number of repeat units represented by

##STR00002##

z number of repeat units represented by

##STR00003##

and at least one terminal group represented by

##STR00004##

x, y, and z are independent and can be an integer larger than or equal to 1; and x/(x+y+z) is from about 0.5 to 0.7, y/(x+y+z) is from about 0.1 to 0.2, and z/(x+y+z) is from about 0.1 and 0.4.

A modified liquid diene-based rubber (A) including, in a molecule, a modified group (a) containing a (meth)acryloyl group as a part thereof and at least one modified group (b) selected from a dicarboxylic acid monoester and a dicarboxylic acid monoamide, with the proviso that the modified group (b) comprises no (meth)acryloyl group as a part thereof, wherein the functional group equivalent weights of the modified group (a) and the modified group (b) are each in the range of 700 to 40,000 g/eq. Also provided is a curable resin composition containing the modified liquid diene-based rubber.