293 results about "Quaternary carbon" patented technology

An article of manufacture and method of making and implanting the article made of a polyolefin star or linear copolymer are disclosed in which the polyolefin copolymer is biostable and crack-resistant when implanted in vivo. The polyolefin copolymer is the reaction product of a rubbery component which when homopolymerized produces a polymer having a low level of hardness, and a hardening component which when homopolymerized produces a polymer having a high level of hardness. The polyolefin copolymer is elastomeric, has a hardness intermediate the low and high levels of hardness, and has a backbone in which the majority of polymer linkages along the copolymer chain are alternating quaternary and secondary carbon atoms.

Stable carbene ligands are provided having a carbene center flanked by a quaternary carbon and an amino group, and having utility in the preparation of various transition metal complexes.

The present invention provides a curable composition which has a high recovery ratio, a high creep resistance, a practical curability and storage stability. The present invention relates to a curable composition comprising a reactive silicon group containing organic polymer (A) and a carboxylic acid (B), wherein the composition comprises (I), as the carboxylic acid (B), a carboxylic acid (C) in which the carbon adjacent to the carbonyl group is a quaternary carbon atoms and / or the composition comprises (II) a metal carboxylate (D) formed between a carboxylic acid in which the carbon atoms adjacent to the carbonyl group is a quaternary carbon atoms and a metal atom of 208 or less in atomic weight.

An actinic ray-sensitive or radiation-sensitive resin composition includes any of the compounds of general formula (I) below;wherein:Ar represents an aromatic ring that may have a substituent other than the -(A-B) groups;n is an integer of 1 or greater;A represents any one, or a combination of two or more members selected from a single bond, an alkylene group, —O—, —S—, —C(═O)—, —S(═O)—, —S(═O)2— and —OS(═O)2—, provided that —C(═O)O— is excluded;B represents a group containing a hydrocarbon group having 4 or more carbon atoms wherein either a tertiary or a quaternary carbon atom is contained,when n is 2 or greater, the two or more -(A-B) groups may be identical to or different from each other; andM+ represents an organic onium ion.

Provided is a nonaqueous electrolyte secondary battery using lithium-manganese composite oxide as positive electrode active material, having superior high-temperature charge storage characteristics and charge-discharge cycling characteristics and enhanced safety in the event of overcharging. A nonaqueous electrolyte secondary battery according to an aspect of the invention includes: a positive electrode plate provided with a positive electrode mixture containing positive electrode active material, a negative electrode plate, a nonaqueous electrolyte, and a pressure-sensitive safety mechanism that is actuated by rise in internal pressure. The positive electrode active material contains lithium-manganese composite oxide containing 10 to 61% by mass of the element manganese. The positive electrode mixture contains lithium carbonate or calcium carbonate, and lithium phosphate. The nonaqueous electrolyte contains an organic additive made of at least one selected from among biphenyl, a cycloalkyl benzene compound, and a compound having quaternary carbon adjacent to a benzene ring.

A non-aqueous electrolyte secondary cell superior in safety against overcharge and in high-temperature cycle characteristic is provided. The non-aqueous electrolyte secondary cell includes a positive electrode, a negative electrode, a non-aqueous electrolyte, and a pressure sensitive safety mechanism that is actuated upon increase in the cell internal pressure. The positive electrode contains lithium carbonate at 0.5 to 1.5 mass %. The non-aqueous electrolyte contains a cycloalkyl benzene compound and / or a compound having a benzene ring and a quaternary carbon adjacent to the benzene ring, the compound or compounds being contained at 0.5 to 2 mass % in total.

This invention relates to an ion-conducting binder used for a membrane electrode assembly for polymer electrolyte fuel cells, the assembly consisting of a polymer electrolyte membrane and two gas diffusion electrodes stuck to the polymer electrolyte membrane with the membrane put between the electrodes, which binder comprises a block copolymer which comprises a polymer block (A) having as a main unit an aromatic vinyl compound unit whose α-carbon is quaternary carbon, and a flexible polymer block (B), and has ion-conducting groups on the polymer block (A), and a solution or suspension thereof, and a membrane electrode assembly and a polymer electrolyte fuel cell.The ion-conducting binder, membrane electrode assembly and polymer electrolyte fuel cell of this invention are economical, mild to the environment and excellent in moldability and oxidation stability.

The nonaqueous electrolyte secondary battery uses a positive electrode active material which is a mixture of large particle diameter-positive electrode active material particles having a central particle diameter D50 of 15 to 30 [mu]m and small particle diameter-positive electrode active material particles having a central particle diameter D50 of 1 to 8 [mu]m, in which the particle size distribution has a peak having a relative particle amount of 5% or more in each of a particle diameter range of 15 to 30 [mu]m and a particle diameter range of 1 to 8 [mu]m, and the nonaqueous electrolyte contains 1,3-dioxane, a vinylene carbonate compound, and at least one type of aromatic compound selected from a cycloalkylbenzene compound and a compound having a quaternary carbon adjacent to a benzene ring, thus having high safety when overcharged, a large initial capacity and excellent charging-discharging cycle characteristics and generating less gas.

The present invention provides a non-aqueous electrolyte secondary battery with excellent high temperature cycle characteristics and high temperature storage durability, further with high safety for its capability to prevent overcharge. The non-aqueous electrolyte of the present non-aqueous electrolyte secondary battery comprises the addition of vinylenecarbonate derivatives, cyclic sulfonate derivatives, phenylcycloalkane derivatives and alkyl benzene derivatives with the quaternary carbon binding to benzene ring directly.