Otsuka Chemical Co.

Tokushima-shi, Japan

Otsuka Chemical Co.

Tokushima-shi, Japan
SEARCH FILTERS
Time filter
Source Type

Provided is a rubber composition that has better weather resistance than conventional rubber compositions and can inhibit rubber article surface discoloration. The rubber composition contains at least one rubber component selected from natural rubber and diene-based synthetic rubbers and, blended therewith, at least one bisphenyldiamine compound represented by formula (I). In formula (I), R^(1), R^(2), R^(5), and R^(6 )each represent, independently of one another, a hydrogen atom, an alkyl group having a carbon number of 1-10, or a phenyl group, but R^(1 )and R^(2 )do not both simultaneously represent a hydrogen atom and R^(5 )and R^(6 )do not both simultaneously represent a hydrogen atom, R^(3 )and R^(4 )each represent, independently of one another, an alkyl group having a carbon number of 1-8 or an aralkyl group, A represents an alkylene group having a carbon number of 1-12, and l, m, and n each represent an integer of 0 or 1.


Patent
Otsuka Chemical Co. | Date: 2017-08-30

Provided are porous titanate compound particles capable of giving excellent fade resistance when used in a friction material, a resin compound and a friction material each containing the porous titanate compound particles, and a method for producing the porous titanate compound particles. Porous titanate compound particles are each formed of titanate compound crystal grains bonded together and have a cumulative pore volume of 5% or more within a pore diameter range of 0.01 to 1.0 m.


Provided is a rubber composition that has better weather resistance than conventional rubber compositions and can inhibit rubber article surface discoloration. The rubber composition contains at least one rubber component selected from natural rubber and diene-based synthetic rubbers and, blended therewith, at least one bisphenyldiamine compound represented by formula (I). In formula (I), R^(1), R^(2), R^(5), and R^(6) each represent, independently of one another, a hydrogen atom, an alkyl group having a carbon number of 1-10, or a phenyl group, but R^(1) and R^(2) do not both simultaneously represent a hydrogen atom and R^(5) and R^(6) do not both simultaneously represent a hydrogen atom, R^(3) and R^(4) each represent, independently of one another, an alkyl group having a carbon number of 1-8 or an aralkyl group, A represents an alkylene group having a carbon number of 1-12, and l, m, and n each represent an integer of 0 or 1.


Patent
Otsuka Chemical Co. | Date: 2017-02-01

The object of the present invention is to provide a hemostatic pharmaceutical composition that has higher usability compared to a hemostatic agent employing conventional biogels and may form a transparent and homogeneous hydrogel in a broad pH. The present invention provides a hemostatic pharmaceutical composition comprising a sugar chain-polypeptide complex characterized in that said polypeptide in said sugar chain-polypeptide complex is a polypeptide comprising an amino acid sequence in which polar and nonpolar amino acid residues are alternately arranged, and one or more sugar chains are bound to said polypeptide.


Patent
Otsuka Chemical Co. | Date: 2017-03-29

Provided is a rubber composition that has better weather resistance than conventional rubber compositions and can inhibit surface discoloration of a rubber article. The rubber composition contains at least one rubber component selected from natural rubber and diene-based synthetic rubbers and, blended therewith, at least one amine compound represented by formula (I) shown below. In formula (I), R^(1) and R^(2) each represent, independently of one another, an alkyl group having a carbon number of 1-10, an aralkyl group, or a phenyl group, and A represents an alkylene group having a carbon number of 6-30 that may include an interposed phenylene group.


Patent
Otsuka Chemical Co. | Date: 2017-03-29

Provided is a rubber composition that contains at least one rubber component selected from natural rubber and diene-based synthetic rubbers and, blended therewith, at least one bisanilino compound represented by formula (I). In formula (I), R^(1) and R^(2) each represent, independently of one another, a hydrogen atom or an alkyl group having a carbon number of 1-6, m and n each represent an integer of 0 or 1, A^(1) represents an alkylene group having a carbon number of 1-7, A^(2) represents an alkylene group having a carbon number of 1-8, X^(1) represents an oxygen atom, a sulfur atom, or an -NR^(3)- group, and X^(2) represents an oxygen atom, a sulfur atom, or an -NR^(4)- group, where R^(3) and R^(4) each represent a hydrogen atom or an alkyl group having a carbon number of 1-4, or collectively form an alkylene group having a carbon number of 1-4.


An object of the present invention is to provide a crystal of a cyclic phosphonic acid sodium salt (2ccPA) with high purity and excellent storage stability and a method for producing the crystal. The present invention provides a crystal of a cyclic phosphonic acid sodium salt (2ccPA) represented by formula (1):


Patent
Otsuka Chemical Co. | Date: 2016-08-06

The object of the present invention is to provide a hemostatic pharmaceutical composition that has higher usability compared to a hemostatic agent employing conventional biogels and may form a transparent and homogeneous hydrogel in a broad pH. The present invention provides a hemostatic pharmaceutical composition comprising a sugar chain-polypeptide complex characterized in that said polypeptide in said sugar chain-polypeptide complex is a polypeptide comprising an amino acid sequence in which polar and nonpolar amino acid residues are alternately arranged, and one or more sugar chains are bound to said polypeptide.


Patent
Otsuka Chemical Company | Date: 2016-05-11

Provided is a nonaqueous electrolytic solution that provides an electric double layer capacitor having excellent durability. The nonaqueous electrolytic solution is prepared by dissolving a quaternary ammonium salt as an electrolyte in a nonaqueous solvent, and the nonaqueous electrolytic solution comprises a diethylpyrrolidinium salt and/or a 1-ethyl-1,3-dimethylpyrrolidinium salt.


Patent
Otsuka Chemical Company | Date: 2016-02-03

Provided are: a resin composition that can be given excellent formability and wear resistance when used as a friction material or the like; and a method for producing the resin compound. A titanate compound, which is a salt of at least one element selected from the group consisting of alkali metals and alkaline earth metals, is dispersively contained in a thermosetting resin prior to curing.

Loading Otsuka Chemical Co. collaborators
Loading Otsuka Chemical Co. collaborators