Provided is a pneumatic tire having well-improved fuel economy, rubber tensile strength, and abrasion resistance while maintaining adequate productivity. The present invention relates to a pneumatic tire formed from a rubber composition, the rubber composition containing a hydrogenated copolymer and a sulfur donor, the hydrogenated copolymer containing a structural unit derived from an aromatic vinyl compound and a structural unit derived from a conjugated diene compound and having a degree of hydrogenation of the conjugated diene portion of 75 mol % or more, the hydrogenated copolymer being present in an amount of 75% by mass or more based on 100% by mass of a rubber component in the rubber composition, the sulfur donor being present in an amount of 0.2 to 8 parts by mass per 100 parts by mass of the rubber component.

A pneumatic tire having excellent high-temperature grip performance and abrasion resistance is provided. The pneumatic tire is a tire having a tread composed of a predetermined rubber composition comprising a diene rubber comprising isoprene rubber, carbon black, silica, a compound comprising a predetermined bonding unit I and a bonding unit II, and a compound represented by a predetermined formula.

A pneumatic tire having excellent high-temperature grip performance and abrasion resistance is provided. The pneumatic tire is a tire having a tread composed of a predetermined rubber composition comprising a diene rubber comprising isoprene rubber, carbon black, silica, a compound comprising a predetermined bonding unit I and a bonding unit II, and a compound represented by a predetermined formula.

A flame-retardant epoxy resin composition wherein (A) epoxy resin, (B) a curing agent and (C) a phosphorous-containing compound expressed by the following general formula (1) are contained; a prepreg using the same and a laminated plate using said prepreg; ##STR00001##
wherein m expresses an integer from 2 to 10, R.sup.1 and R.sup.2 each independently express an alkyl group or an aryl group, R.sup.3 expresses a hydrocarbon group that may contain an oxygen atom, a sulfur atom or a nitrogen atom, X expresses an oxygen atom or a sulfur atom, Y expresses an oxygen atom, a sulfur atom or NR.sup.4, and in this regard, R.sup.4 expresses a hydrogen atom, an alkyl group or an aryl group.

A flame-retardant epoxy resin composition wherein (A) epoxy resin, (B) a curing agent and (C) a phosphorous-containing compound expressed by the following general formula (1) are contained; a prepreg using the same and a laminated plate using said prepreg; ##STR00001##
wherein m expresses an integer from 2 to 10, R.sup.1 and R.sup.2 each independently express an alkyl group or an aryl group, R.sup.3 expresses a hydrocarbon group that may contain an oxygen atom, a sulfur atom or a nitrogen atom, X expresses an oxygen atom or a sulfur atom, Y expresses an oxygen atom, a sulfur atom or NR.sup.4, and in this regard, R.sup.4 expresses a hydrogen atom, an alkyl group or an aryl group.

A flame-retardant epoxy resin composition wherein (A) epoxy resin, (B) a curing agent and (C) a phosphorous-containing compound expressed by the following general formula (1) are contained; a prepreg using the same and a laminated plate using said prepreg; ##STR00001##
wherein m expresses an integer from 2 to 10, R.sup.1 and R.sup.2 each independently express an alkyl group or an aryl group, R.sup.3 expresses a hydrocarbon group that may contain an oxygen atom, a sulfur atom or a nitrogen atom, X expresses an oxygen atom or a sulfur atom, Y expresses an oxygen atom, a sulfur atom or NR.sup.4, and in this regard, R.sup.4 expresses a hydrogen atom, an alkyl group or an aryl group.

A synthesis method includes synthesising copolydendrimers containing heteroatoms from at least two dendrimers as starting precursors.

A synthesis method includes synthesising copolydendrimers containing heteroatoms from at least two dendrimers as starting precursors.

Provided are an organic silicon resin composition, prepreg and laminate using the same. The organic silicon resin composition glue solution contains a condensation silicon resin, a catalyst, an auxiliary agent, a white filler and a solvent as necessary components, and is impregnated in a reinforced material such as a sheet-like fiberglass fiber base material and then dried to prepare the prepreg. The prepreg has a net structure via crosslinking of the silicon resin using a condensation reaction. Since the organic silicon resin has ultrahigh heat resistance and yellowing resistance, the present invention applies the silicon resin to a white LED copper-clad laminate instead of a traditional organic resin, satisfying the demand for high heat resistance, and replacing the ceramic substrate to be a new heat-dissipating substrate base material.

New rubber mixtures on the basis of natural rubber and N, N-dicyclohexyl-p-phenylenediamine are extremely well suited for the production of vulcanized rubbers and moulded parts obtainable therefrom, in particular tires, tire parts or technical rubber articles with improved use properties.