摘要:
The present invention is directed to a pneumatic tire comprising a ground contacting tread, the tread comprising a rubber composition comprising from 30 to 70 parts by weight, per 100 parts by weight of s first elastomer (phr) having a glass transition temperature Tg ranging from about −40° C. to about −10° C. and a solubility parameter ranging from about 4.1 MPa1/2 to about 4.5 MPa1/2; from 70 to 30 phr of a second elastomer having a Tg ranging from about −105° C. to about −30° C. and a solubility parameter ranging from about 3.7 MPa1/2 to about 4.1 MPa1/2; from 1 to 40 phr of a first plasticizer having a solubility parameter ranging from 3.4 MPa1/2 to 3.8 MPa1/2; from 1 to 20 phr of a second plasticizer having a solubility parameter ranging from 4.3 MPa1/2 to 4.7 MPa1/2; and from 30 to 150 phr of silica.
摘要:
The present invention is directed to a pneumatic tire comprising a ground contacting tread, the tread comprising a rubber composition comprising a solution polymerized styrene-butadiene rubber having a bound styrene content of at least 36 percent by weight and a vinyl 1,2 content of less than 25 percent by weight; optionally, at least one additional diene based rubber; silica; a sulfur donor; a sulfenamide accelerator; at least one secondary accelerator selected from the group consisting of guanidines, dithiocarbamates and thiurams; and an α,ω-bis(N,N′-dihydrocarbylthiocarbamamoyldithio)alkane; wherein the zinc content of the rubber composition is less than 0.5 parts by weight, per 100 parts by weight of elastomer (phr) as Zn metal.
摘要:
The present invention is directed to a pneumatic tire comprising a ground contacting tread, the tread comprising a rubber composition comprising a solution polymerized styrene-butadiene rubber having a bound styrene content of at least 36 percent by weight and a vinyl 1,2 content of less than 25 percent by weight; optionally, at least one additional diene based rubber; silica; a sulfur donor; a sulfenamide accelerator; at least one secondary accelerator selected from the group consisting of guanidines, dithiocarbamates and thiurams; and an α,ω-bis(N,N′-dihydrocarbylthiocarbamamoyldithio)alkane; wherein the zinc content of the rubber composition is less than 0.5 parts by weight, per 100 parts by weight of elastomer (phr) as Zn metal.
摘要:
A method of making a graft copolymer, comprising the steps of obtaining a first polymer comprising at least one carbon-carbon double bond, the first polymer derived from at least one first monomer, the at least one first monomer comprising a conjugated diene monomer; obtaining a second polymer, the second polymer capable of exhibiting a lower critical solution temperature (LCST) and comprising a terminal functional group capable of reacting with the carbon-carbon double bond; and reacting the second polymer with the first polymer to form a graft copolymer, the graft copolymer comprising a backbone derived from the first polymer and sidechains derived from the second polymer.
摘要:
The present invention is directed to a pneumatic tire comprising at least one component selected from the group consisting of apexes, flippers and chippers, the at least one component comprising a rubber composition, the rubber composition comprising a diene based elastomer and from 1 to 30 parts by weight, per 100 parts by weight of elastomer (phr), of a polybenzobisoxazole (PBO) short fiber having a length ranging from 0.5 to 20 mm having a thickness ranging from 10 to 30 microns, and from 1 to 50 phr of an epoxidized polyisoprene having a number-average molecular weight of 5000 to 100000.
摘要:
A pneumatic tire including a circumferential tread, two spaced apart beads, and sidewalls connecting said beads and tread, wherein said tire sidewall contains at least one internal annular sidewall insert including at least two annular segments, the at least two annular segments including first and second adjacent annular segments; wherein said first and second annular segments are disposed with an interface therebetween; wherein each of the at least two annular segments includes a rubber composition comprising at least one diene based rubber and at least one vulcanization modifier selected from the group consisting of α,ω-bis(N,N′-dihydrocarbylthiocarbamamoyldithio)alkanes, bismaleimides, and biscitraconimides; and wherein the concentration of vulcanization modifier in the first annular segment is less than the concentration of vulcanization modifier in the second annular segment.
摘要:
A component (30) is to be attached by means of a plug connector (10) in a hole (53) of a base plate (50). To this end, the plug connector (10) has a shaft (15) with a flat profile. When the plug is inserted in the socket, the shaft end (20) projects out of the hole (53) on the rear side of the circuit board (52). The shaft end (20) is followed by a shaft section (13), broadened relative to the hole width (54), which has an opening (14). By means of the opening (14), the shaft section (13) is split into two legs (11, 12), which are sprung against each another and which hold the shaft (15) in the hole (53) of the circuit board (50) when the plug is inserted in the socket. To improve the holding effect, the two legs (11, 12) are constructed differently one from the other, wherein one leg (11) has a greater longitudinal extension (21) than the other (12). This means that the broadened shaft section (13) splits into a long (11) and a short leg (12). Both legs (11, 12) taper into an undercut head (40) on the shaft end (20). When the plug is inserted in the socket, the head (40) engages with the hole-edge of the circuit board (50).
摘要:
A degradable sipe blade for forming sipes in a tire tread, where the degradable material may be removed by exposure to water. A tire curing apparatus is also provided having a plurality of degradable sipe blades affixed to the mold surface within the tread pattern. In addition, a cured tire is provided having the degradable sipe blades embedded in the tread elements of the tire tread after removal of the cured tire from a curing mold. Further provided is a method for forming sipes in a tire tread using degradable blading.