A negative-electrode active material is provided, the negative-electrode active material including: a lamellar polysilane having a structure in which multiple six-membered rings constituted of a silicon atom are disposed one after another, and expressed by a compositional formula, (SiH).sub.n, as a basic skeleton; and the negative-electrode active material containing copper in an amount of from 0.01 to 50% by mass. To contain copper results in upgrading electron conductivity. Consequently, an electric storage apparatus using the negative-electrode active material for one of the negative electrodes has upgraded rate characteristic, and also has augmented charged and discharged capacities.

A negative-electrode active material is provided, the negative-electrode active material including: a lamellar polysilane having a structure in which multiple six-membered rings constituted of a silicon atom are disposed one after another, and expressed by a compositional formula, (SiH).sub.n, as a basic skeleton; and the negative-electrode active material containing copper in an amount of from 0.01 to 50% by mass. To contain copper results in upgrading electron conductivity. Consequently, an electric storage apparatus using the negative-electrode active material for one of the negative electrodes has upgraded rate characteristic, and also has augmented charged and discharged capacities.

Described herein are compositions and methods for use in automotive care. In particular, the present disclosure is directed to compositions that provide an improved cure time and durability and methods of use thereof.

A photocurable silicone composition, containing: (A) an organopolysiloxane having at least one specific structure having a (meth)acryl group in the molecule; (B) an organohydrogenpolysiloxane having at least two hydrogen atoms bonded to a silicon atom in one molecule; (C) a photo-radical polymerization initiator; and (D) a platinum-group metal catalyst to be activated by light having a wavelength of 200 to 500 nm. The photocurable silicone composition has good storability, and good surface curability and deep-part curability in the air; an adhesive consisting of this photocurable silicone composition; and a cured material of this photocurable silicone composition.

A photocurable silicone composition, containing: (A) an organopolysiloxane having at least one specific structure having a (meth)acryl group in the molecule; (B) an organohydrogenpolysiloxane having at least two hydrogen atoms bonded to a silicon atom in one molecule; (C) a photo-radical polymerization initiator; and (D) a platinum-group metal catalyst to be activated by light having a wavelength of 200 to 500 nm. The photocurable silicone composition has good storability, and good surface curability and deep-part curability in the air; an adhesive consisting of this photocurable silicone composition; and a cured material of this photocurable silicone composition.

A curable composition including: (A) an ester bond-containing organosilicon compound having two or more addition reactive carbon-carbon double bonds in one molecule, shown by the following general formula (1); (B) a silicon compound having two or more silicon atom-bonded hydrogen atoms in one molecule; and (C) a hydrosilylation reaction catalyst. This provides a curable composition to give a cured product with low gas permeability as well as excellent crack resistance and light transmission property. ##STR00001##

A curable composition including: (A) an ester bond-containing organosilicon compound having two or more addition reactive carbon-carbon double bonds in one molecule, shown by the following general formula (1); (B) a silicon compound having two or more silicon atom-bonded hydrogen atoms in one molecule; and (C) a hydrosilylation reaction catalyst. This provides a curable composition to give a cured product with low gas permeability as well as excellent crack resistance and light transmission property. ##STR00001##

A method for producing a polycarbonate copolymer which has siloxane constituent units represented by any of formulae (1-1)′ to (1-4)′ and prescribed polycarbonate constituent units, the method having a polymerization step for polymerizing a silane-based compound selected from among a prescribed diaryloxysilane compound, a prescribed dialkoxysilane compound and a prescribed silicon compound, a carbonate compound and a diol compound such as an aromatic diol compound or an alicyclic diol compound in the presence of a transesterification catalyst. The polymerization step is carried out in a molten state under reduced pressure while removing alcohols derived from the carbonate compound.

##STR00001##

A method for producing a polycarbonate copolymer which has siloxane constituent units represented by any of formulae (1-1)′ to (1-4)′ and prescribed polycarbonate constituent units, the method having a polymerization step for polymerizing a silane-based compound selected from among a prescribed diaryloxysilane compound, a prescribed dialkoxysilane compound and a prescribed silicon compound, a carbonate compound and a diol compound such as an aromatic diol compound or an alicyclic diol compound in the presence of a transesterification catalyst. The polymerization step is carried out in a molten state under reduced pressure while removing alcohols derived from the carbonate compound.

##STR00001##

Biomaterial compositions comprising organosilicon monomers (such as silorane monomers) and chemical curing systems or dual chemical/light curing systems, in conjunction with optional tetraoxaspiro[5.5]undecanes (“TOSUs”) and/or fillers.