The present invention relates to a rubber composition which makes it possible to achieve both of a riding comfort during normal running and durability during run flat running in a run flat tire. The rubber composition is a rubber composition containing a rubber component, a filler, a vulcanizing agent, and a vulcanization accelerator, wherein the rubber component contains 50% by mass or more of a modified conjugated diene-based rubber; the filler contains a carbon black; and the vulcanization accelerator contains a thiuram-based vulcanization accelerator, the carbon black being contained in an amount of 40 to 60 parts by mass, and the thiuram-based vulcanization accelerator being contained in an amount of 2.6 to 5.5 parts by mass based on 100 parts by mass of the rubber component.

A polybenzoxazine sulfide has repeating units including at least one unit corresponding to formula (I) or (II):

##STR00001##

in which the two oxazine rings are connected together via a central aromatic group, the benzene ring of which bears one, two, three or four groups of formula S.sub.xR in which x is an integer from 1 to 8 and R represents hydrogen or a hydrocarbon-based group including 1 to 10 carbon atoms and optionally a heteroatom chosen from O, S, N and P. Such a polybenzoxazine can be used as an adhesive layer on metal, in particular for the adhesive bonding of a metallic substrate, in particular made of carbon steel, to rubber.

A polybenzoxazine sulfide has repeating units including at least one unit corresponding to formula (I) or (II):

##STR00001##

in which the two oxazine rings are connected together via a central aromatic group, the benzene ring of which bears one, two, three or four groups of formula S.sub.xR in which x is an integer from 1 to 8 and R represents hydrogen or a hydrocarbon-based group including 1 to 10 carbon atoms and optionally a heteroatom chosen from O, S, N and P. Such a polybenzoxazine can be used as an adhesive layer on metal, in particular for the adhesive bonding of a metallic substrate, in particular made of carbon steel, to rubber.

The invention discloses functionalized poly(2,6-dimethyl phenylene oxide oxide) oligomers containing dicyclopentadiene, a method of producing the same and use thereof. The cured products of the functionalized poly(2,6-dimethyl phenylene oxide oxide) oligomers of the invention exhibit low dielectric constant, low dissipation, and high glass transition temperature. As the functionalized poly(2,6-dimethyl phenylene oxide oxide) oligomers of the invention have number-average molecular weight ranging from 2500 to 6000 g/mol, the substrate made of theses functionalized poly(2,6-dimethyl phenylene oxide oxide) oligomers can pass the pressure cook test. Besides, the low dissipation factor characteristic the functionalized poly(2,6-dimethyl phenylene oxide oxide) oligomers of the invention can only be demonstrated at number-average molecular weight higher than 2500 g/mol.

The invention discloses functionalized poly(2,6-dimethyl phenylene oxide oxide) oligomers containing dicyclopentadiene, a method of producing the same and use thereof. The cured products of the functionalized poly(2,6-dimethyl phenylene oxide oxide) oligomers of the invention exhibit low dielectric constant, low dissipation, and high glass transition temperature. As the functionalized poly(2,6-dimethyl phenylene oxide oxide) oligomers of the invention have number-average molecular weight ranging from 2500 to 6000 g/mol, the substrate made of theses functionalized poly(2,6-dimethyl phenylene oxide oxide) oligomers can pass the pressure cook test. Besides, the low dissipation factor characteristic the functionalized poly(2,6-dimethyl phenylene oxide oxide) oligomers of the invention can only be demonstrated at number-average molecular weight higher than 2500 g/mol.

The disclosure relates to a photocurable sealant composition comprising (A) a liquid rubber, (B) a (meth)acryloyl group-containing compound, (C) an aromatic sensitization aid capable of absorbing light having a wavelength of 300 nm or higher, and (D) a photopolymerization initiator. The disclosure also relates to an article selected from the group consisting of a solar cell, a display, an electronic component, a coating material and an adhesive, comprising a cured product of the photocurable sealant composition. The disclosure further relates to an organic solar cell wherein a light blocking member is disposed on a first surface of a first electrode substrate, and a sealant is positioned at least at a light blocking part on a side opposite to the light incident surface side, of the light blocking member.

The disclosure relates to a photocurable sealant composition comprising (A) a liquid rubber, (B) a (meth)acryloyl group-containing compound, (C) an aromatic sensitization aid capable of absorbing light having a wavelength of 300 nm or higher, and (D) a photopolymerization initiator. The disclosure also relates to an article selected from the group consisting of a solar cell, a display, an electronic component, a coating material and an adhesive, comprising a cured product of the photocurable sealant composition. The disclosure further relates to an organic solar cell wherein a light blocking member is disposed on a first surface of a first electrode substrate, and a sealant is positioned at least at a light blocking part on a side opposite to the light incident surface side, of the light blocking member.

A thermoplastic elastomer composition including at least one elastomer component selected from the group consisting of elastomeric polymers (A) each of which has a side chain (a) containing a hydrogen-bond cross-linkable moiety having a carbonyl-containing group and/or a nitrogen-containing heterocycle and has a glass-transition point of 25 C. or below, and elastomeric polymers (B) each of which contains a hydrogen-bond cross-linkable moiety and a covalent-bond cross-linking moiety in a side chain and has a glass-transition point of 25 C. or below, wherein the elastomer component is at least one reaction product selected from the group consisting of specific reaction products (I) to (VI), and the composition further comprises an organically modified clay, a content ratio of which is 20 parts by mass or less relative to 100 parts by mass of the elastomer component.

A thermoplastic elastomer composition including at least one elastomer component selected from the group consisting of elastomeric polymers (A) each of which has a side chain (a) containing a hydrogen-bond cross-linkable moiety having a carbonyl-containing group and/or a nitrogen-containing heterocycle and has a glass-transition point of 25 C. or below, and elastomeric polymers (B) each of which contains a hydrogen-bond cross-linkable moiety and a covalent-bond cross-linking moiety in a side chain and has a glass-transition point of 25 C. or below, wherein the elastomer component is at least one reaction product selected from the group consisting of specific reaction products (I) to (VI), and the composition further comprises an organically modified clay, a content ratio of which is 20 parts by mass or less relative to 100 parts by mass of the elastomer component.

Provided are a modified conjugated diene-based polymer comprising a conjugated diene-based monomer-derived repeating unit; and a chain extender-derived part which is linked to both terminals of the conjugated diene based monomer-derived repeating unit, respectively, includes one or more urethane groups in a molecular chain, and has different functional groups at both terminals, wherein one of the functional groups is an alkyne group, wherein a terminal of the chain extender-derived part which is not linked to both terminals of the conjugated diene based monomer-derived repeating unit is an alkyne group, a manufacturing method thereof, a binder composition for a solid propellant comprising the same, a modified conjugated diene based binder for a solid propellant, and a manufacturing method thereof.