摘要:
The invention relates to an isoprene oligomer that contains a trans structural moiety and a cis structural moiety, which can be represented by the following formula (1), wherein at least 1 atom or group in the trans structural moiety is replaced by another atom or group. The invention also relates to a polyisoprene, which is biosynthesized using the isoprene oligomer and isopentenyl diphosphate. Further, this invention provides a rubber composition comprising the isoprene oligomer and/or the polyisoprene, and a pneumatic tire, including tire components (e.g., treads and sidewalls) formed from the rubber composition. wherein n represents an integer from 1 to 10; m represents an integer from 1 to 30; and Y represents a hydroxy group, a formyl group, a carboxy group, an ester group, a carbonyl group, or a group represented by the following formula (2):
摘要:
The present invention provides rubber compositions for tires which are capable of improving handling stability, fuel efficiency, and processability while sufficiently reducing the dependence on petroleum resources, and pneumatic tires including tire components (e.g. bead apex) formed from the rubber compositions for tires. The present invention relates to rubber compositions for tires, containing a rubber component and a naturally derived phenolic resin.
摘要:
The present invention provides a rubber composition for a clinch apex which improves in fuel economy, flex crack growth resistance, and processability in a balanced manner, and also provides a pneumatic tire produced using the rubber composition. The present invention relates to a rubber composition for a clinch apex, including: a modified natural rubber having a phosphorus content of 200 ppm or less; and at least one of carbon black and a white filler.
摘要:
The present invention provides a rubber composition for a tread which enables improvement in fuel economy, breaking performance, and abrasion resistance in a balanced manner; a method for producing the rubber composition; and a heavy-load tire. The present invention relates to a rubber composition for a tread of a heavy-load tire, including a modified natural rubber having a phosphorus content of 200 ppm or less, and carbon black.
摘要:
The present invention provides a modified natural rubber which simultaneously achieves good fuel economy and good heat-aging resistance, and the production method thereof. The present invention also provides a tire rubber composition and a pneumatic tire which are produced using the modified natural rubber. The present invention relates to a modified natural rubber which is obtainable by treating a rubber coagulated from a saponified natural rubber latex, with a basic compound and then with an acidic compound.
摘要:
The present invention provides an oil extended rubber for a tire, which is obtained by a process for preparing an oil extended rubber for a tire, comprising: (a) a step of preparing an oil-in-water type emulsion by emulsifying a vegetable oil having an iodine value of not less than 135 with a surfactant; (b) a step of mixing said emulsion of vegetable oil and a modified natural rubber latex, and then maturing the mixture; and (c) a step of coagulating the mixture obtained in the step (b) to obtain a lump of a rubber.
摘要:
The present invention provides a modified natural rubber which simultaneously achieves good fuel economy and good heat-aging resistance, and the production method thereof. The present invention also provides a tire rubber composition and a pneumatic tire which are produced using the modified natural rubber. The present invention relates to a modified natural rubber which is obtainable by treating a rubber coagulated from a saponified natural rubber latex, with a basic compound and then with an acidic compound.
摘要:
The present invention provides an oil extended rubber for a tire, which is obtained by a process for preparing an oil extended rubber for a tire, comprising: (a) a step of preparing an oil-in-water type emulsion by emulsifying a vegetable oil having an iodine value of not less than 135 with a surfactant; (b) a step of mixing said emulsion of vegetable oil and a modified natural rubber latex, and then maturing the mixture; and (c) a step of coagulating the mixture obtained in the step (b) to obtain a lump of a rubber.
摘要:
The present invention provides a tire puncture sealant which has a reduced viscosity at low temperatures and better injectability at low temperatures while exerting excellent initial sealing performance and storage stability. The present invention also provides a tire puncture sealant which further has better injectability at high temperatures while exerting the seal retention performance. The present invention relates to a tire puncture sealant including: a natural rubber latex; a tackifier; and propylene glycol, wherein the amount of the propylene glycol in 100% by mass of a liquid portion of the puncture sealant is 55% by mass or more, and also relates to a tire puncture sealant including: a natural rubber latex; a tackifier; propylene glycol; and a nonionic surfactant, wherein the nonionic surfactant is a polyoxyalkylene alkyl ether and/or a polyoxyalkylene alkenyl ether.
摘要:
The present invention provides a modified natural rubber obtained by adding a compound to at least one natural rubber raw material selected from the group consisting of a solid natural rubber, a natural rubber latex, and a natural rubber derivative and then irradiating the mixture of the natural rubber raw material and the compound with microwaves to graft-polymerize or attach the compound to the natural rubber raw material, a method for producing the modified natural rubber, a rubber composition containing the modified natural rubber, and a tire produced using the rubber composition.