Abstract: The present invention relates to a random copolymer including a monomer unit (a) derived from an aromatic vinyl compound and a monomer unit (b) derived from farnesene; a process for producing the copolymer including at least the step of copolymerizing an aromatic vinyl compound with farnesene; a rubber composition including (A) the copolymer, (B) a rubber component and (C) carbon black; a rubber composition including (A) the copolymer, (B) a rubber component and (D) silica; a rubber composition including (A) the copolymer, (B) a rubber component, (C) carbon black and (D) silica; and a tire using the rubber composition at least as a part thereof.

Abstract: The present invention relates to a rubber composition including a rubber component (A), a farnesene polymer (B) and silica (C).

Abstract: There is provided a lipid peptide that is capable of forming a hydrogel with an extremely small amount thereof over a liquid property range from acidic to alkaline, and a hydrogel having high environmental suitability, biocompatibility and biodegradability. A lipid peptide represented by Formula (1): (where R1 represents an aliphatic group having 9 to 23 carbon atoms; R2, R3, R4 and R5 independently represent a hydrogen atom, an alkyl group having 1 to 7 carbon atom(s) which optionally has a branched chain having 1 to 3 carbon atom(s), a phenylmethyl group, a phenylethyl group or a —(CH2)n—X group, and at least one of R2, R3, R4 and R5 represents a —(CH2)n—X group; n represents the number of 1 to 4; X represents an amino group, a guanidine group, a —CONH2 group or a 5-membered ring, a 6-membered ring or a fused heterocyclic ring composed of a 5-membered ring and a 6-membered ring which optionally have 1 to 3 nitrogen atom(s); and in represents 1 or 2), and a hydrogel comprising the lipid peptide.

Abstract: The present invention relates to a rubber composition including (A) at least one rubber component selected from the group consisting of a synthetic rubber and a natural rubber; (B) a polymer of farnesene; and (C) carbon black having an average particle size of from 5 to 100 nm, a content of the carbon black (C) in the rubber composition being from 20 to 100 parts by mass on the basis of 100 parts by mass of the rubber component (A).

Abstract: There is provided a lipid peptide that is capable of forming a hydrogel with an extremely small amount thereof over a liquid property range from acidic to alkaline, and a hydrogel having high environmental suitability, biocompatibility and biodegradability. A lipid peptide represented by Formula (1): where R1 represents an aliphatic group having 9 to 23 carbon atoms; R2, R3, R4 and R5 independently represent a hydrogen atom, an alkyl group having 1 to 7 carbon atom(s) which optionally has a branched chain having 1 to 3 carbon atom(s), a phenylmethyl group, a phenylethyl group or a —(CH2)n—X group, and at least one of R2, R3, R4 and R5 represents a —(CH2)n—X group; n represents the number of 1 to 4; X represents a guanidino group, a —CONH2 group or a 5-membered ring, a 6-membered ring or a fused heterocyclic ring composed of a 5-membered ring and a 6-membered ring which optionally have 1 to 3 nitrogen atom(s); and m represents 1 or 2, and a hydrogel comprising the lipid peptide.

Abstract: The present invention relates to a rubber composition including (A) at least one rubber component selected from the group consisting of a synthetic rubber and a natural rubber; (B) a polymer of farnesene; and (C) carbon black having an average particle size of from 5 to 100 nm, a content of the carbon black (C) in the rubber composition being from 20 to 100 parts by mass on the basis of 100 parts by mass of the rubber component (A).

Abstract: The present invention relates to a rubber composition including (A) at least one rubber component selected from the group consisting of a synthetic rubber and a natural rubber; (B) a polymer of farnesene having a weight-average molecular weight of not less than 2,000 and less than 25,000; and (C) carbon black.

Abstract: The present invention relates to a rubber composition including (A) at least one rubber component selected from the group consisting of a synthetic rubber and a natural rubber; (B) a polymer of farnesene having a weight-average molecular weight of not less than 2,000 and less than 25,000; and (C) carbon black.

Abstract: A hydrogel that includes an aqueous solution or an alcohol aqueous solution, and a hydrogelator containing a lipid peptide represented by Formula (1), or a pharmaceutically usable salt thereof. In Formula (1), R1 represents an aliphatic group having 9 to 21 carbon atoms; R2, R3, and R4 independently represent a hydrogen atom, an alkyl group having 1 to 4 carbon atoms that optionally has a branched chain having 1 or 2 carbon atoms, a phenylmethyl group, or a —(CH2)n—X group, and at least one of R2, R3, and R4 represents a —(CH2)n—X group; n represents an integer from 1 to 4; and X represents an amino group, a guanidino group, a —CONH2 group, or a 5-membered ring, a 6-membered ring or a fused heterocyclic ring composed of a 5-membered ring and a 6-membered ring that optionally has 1 to 3 nitrogen atoms.

Abstract: There is provided a hydrogelator that is capable of forming a hydrogel with an extremely small amount thereof over a liquid property range from acidic to alkaline, and a hydrogel having high environmental suitability, biocompatibility and biodegradability. A hydrogelator comprising a lipid peptide represented by Formula (1): (where R1 represents an aliphatic group having 9 to 21 carbon atoms; R2, R3 and R4 independently represent a hydrogen atom, an alkyl group having 1 to 4 carbon atom(s) which may have a branched chain having 1 or 2 carbon atom(s), a phenylmethyl group or a —(CH2)n—X group, and at least one of R2, R3 and R4 represents a —(CH2)n—X group; n represents the number of 1 to 4; X represents an amino group, a guanidino group, a —CONH2 group or a 5-membered ring, a 6-membered ring or a fused heterocyclic ring composed of a 5-membered ring and a 6-membered ring which may have 1 to 3 nitrogen atom(s)) or a salt thereof, and a hydrogel comprising the hydrogelator.

Abstract: There is provided a lipid peptide that is capable of forming a hydrogel with an extremely small amount thereof over a liquid property range from acidic to alkaline, and a hydrogel having high environmental suitability, biocompatibility and biodegradability. A lipid peptide represented by Formula (1): (where R1 represents an aliphatic group having 9 to 23 carbon atoms; R2, R3, R4 and R5 independently represent a hydrogen atom, an alkyl group having 1 to 7 carbon atom(s) which optionally has a branched chain having 1 to 3 carbon atom(s), a phenylmethyl group, a phenylethyl group or a —(CH2)—X group, and at least one of R2, R3, R4 and R5 represents a —(CH2)n—X group; n represents the number of 1 to 4; X represents an amino group, a guanidine group, a —CONH2 group or a 5-membered ring, a 6-membered ring or a fused heterocyclic ring composed of a 5-membered ring and a 6-membered ring which optionally have 1 to 3 nitrogen atom(s); and in represents 1 or 2), and a hydrogel comprising the lipid peptide.

Abstract: There is provided a hydrogelator that is capable of forming a hydrogel with an extremely small amount thereof over a liquid property range from acidic to alkaline, and a hydrogel having high environmental suitability, biocompatibility and biodegradability. A hydrogelator comprising a lipid peptide represented by Formula (1): (where R1 represents an aliphatic group having 9 to 21 carbon atoms; R2, R3 and R4 independently represent a hydrogen atom, an alkyl group having 1 to 4 carbon atom(s) which may have a branched chain having 1 or 2 carbon atom(s), a phenylmethyl group or a —(CH2)n—X group, and at least one of R2, R3 and R4 represents a —(CH2)n—X group; n represents the number of 1 to 4; X represents an amino group, a guanidino group, a —CONH2 group or a 5-membered ring, a 6-membered ring or a fused heterocyclic ring composed of a 5-membered ring and a 6-membered ring which may have 1 to 3 nitrogen atom(s)) or a salt thereof, and a hydrogel comprising the hydrogelator.