[Purpose] One of the purposes of the present invention is to provide a siloxane compound having an amide bond and a (meth)acrylate group. Further, other purpose of the present invention is to provide a method for preparing a siloxane compound having beneficial purity as a medical material.

[Solution] A siloxane compound represented by the following formula (1):

##STR00001##

wherein R.sup.1 is a hydrogen atom or a methyl group, R.sup.2 is a hydrogen atom or a monovalent hydrocarbon group having 1 to 6 carbon atoms, L.sup.1 is a divalent hydrocarbon group having 1 to 5 carbon atoms, L.sup.2 is a divalent hydrocarbon group having 2 to 10 carbon atoms and which may contain an ether bond, and A is a polysiloxane unit represented by the following formula (2) or (3):

##STR00002##

wherein n is an integer of 1 to 100, a is an integer of 0 to 10, b is an integer of 0 to 10, and c is an integer of 0 to 10, provided that a+b+c is 2 or more, R and R.sup.3 are, independently of each other, a monovalent hydrocarbon group having 1 to 10 carbon atoms, and the site marked with ** is a binding position to the group L.sup.2 in formula (1).

Provided are: a novel imide-modified organopolysiloxane in a liquid form having excellent resistance to heat; a method for producing the organopolysiloxane; and a curable composition that contains the organopolysiloxane and that can be cured by irradiation with light without using an initiator.

The organopolysiloxane is represented by formula (1).

##STR00001##

(Wherein: each R.sup.1 represents an unsubstituted or substituted monovalent hydrocarbon group having 1-10 carbon atoms or an organic group having a structure represented by formula (2) or (3), and at least one of the R.sup.1s is the organic group having a structure represented by formula (2) or (3); a represents an integer of 2 or more; b, c, and d each represent an integer of 0 or more; and 2a+b+c+d1,000 is satisfied.)

##STR00002##

(Wherein: R.sup.2-R.sup.7 each represent a hydrogen atom or an unsubstituted or substituted monovalent hydrocarbon group having 1-10 carbon atoms; R.sup.2 or R.sup.3 may be linked with R.sup.4 or R.sup.5 to form a ring, and R.sup.6 may be linked with R.sup.7 to form a ring; m and n each represent an integer of 0-3; and X and Y each represent an unsubstituted or substituted divalent hydrocarbon group that has 1-10 carbon atoms and that optionally contains an intervening heteroatom. A dashed line represents a bond.)

Poly-perfluoroalkyl substituted polyethyleneimine compositions are provided that act as foam stabilizers and film formers when used in fire-fighting foam concentrates. The polyethylene compositions are soluble in water, but have only low solubility in polar solvents. When aqueous film forming foam generated from these concentrates is applied to burning polar solvent the polyethyleneimine compositions precipitate at the polar solvent/foam interface and inhibit the collapse and destruction of the foam.

An organosilicon compound with a primary aminopropyl-functional group is prepared. A catalyzed reductive amination process for combining a secondary propylimine-functional organosilicon compound with ammonia and hydrogen produces the primary aminopropyl-functional organosilicon compound.

A flame retardant filler having brominated silica particles, for example, imparts flame retardancy to manufactured articles such as printed circuit boards (PCBs), connectors, and other articles of manufacture that employ thermosetting plastics or thermoplastics. In this example, brominated silica particles serve both as a filler for rheology control (viscosity, flow, etc.) and a flame retardant. In an exemplary application, a PCB laminate stack-up includes conductive planes separated from each other by a dielectric material that includes a flame retardant filler comprised of brominated silica particles. In an exemplary method of synthesizing the brominated silica particles, a monomer having a brominated aromatic functional group is reacted with functionalized silica particles (e.g., isocyanate, vinyl, amine, or epoxy functionalized silica particles). Alternatively, a monomer having a brominated aromatic functional group may be reacted with a silane to produce a brominated alkoxysilane monomer, which is then reacted with the surface of silica particles.

A flame retardant filler having brominated silica particles, for example, imparts flame retardancy to manufactured articles such as printed circuit boards (PCBs), connectors, and other articles of manufacture that employ thermosetting plastics or thermoplastics. In this example, brominated silica particles serve both as a filler for rheology control (viscosity, flow, etc.) and a flame retardant. In an exemplary application, a PCB laminate stack-up includes conductive planes separated from each other by a dielectric material that includes a flame retardant filler comprised of brominated silica particles. In an exemplary method of synthesizing the brominated silica particles, a monomer having a brominated aromatic functional group is reacted with functionalized silica particles (e.g., isocyanate, vinyl, amine, or epoxy functionalized silica particles). Alternatively, a monomer having a brominated aromatic functional group may be reacted with a silane to produce a brominated alkoxysilane monomer, which is then reacted with the surface of silica particles.

A flame retardant filler having brominated silica particles, for example, imparts flame retardancy to manufactured articles such as printed circuit boards (PCBs), connectors, and other articles of manufacture that employ thermosetting plastics or thermoplastics. In this example, brominated silica particles serve both as a filler for rheology control (viscosity, flow, etc.) and a flame retardant. In an exemplary application, a PCB laminate stack-up includes conductive planes separated from each other by a dielectric material that includes a flame retardant filler comprised of brominated silica particles. In an exemplary method of synthesizing the brominated silica particles, a monomer having a brominated aromatic functional group is reacted with functionalized silica particles (e.g., isocyanate, vinyl, amine, or epoxy functionalized silica particles). Alternatively, a monomer having a brominated aromatic functional group may be reacted with a silane to produce a brominated alkoxysilane monomer, which is then reacted with the surface of silica particles.

The invention provides sunless tanning compositions comprising a compounds of formula (I): or a salt thereof as described herein as well as methods for tanning mammalian skin by contacting the skin with the compounds of formula (I) or compositions comprising compounds of formula (I).

The present invention is a mono-functional branched organosiloxane compound that is liquid and shown by the following general formula (1)
M.sub.a-1M.sup.R.sub.a-2D.sub.b-1D.sup.R.sub.b-2T.sub.c-1T.sup.R.sub.c-2Q.sub.d-1(1)
wherein M=R.sup.1.sub.3SiO.sub.0.5, M.sup.R=R.sup.1.sub.2R.sup.2SiO.sub.0.5, D=R.sup.1.sub.2SiO, D.sup.R=R.sup.2R.sup.1SiO, T=R.sup.1SiO.sub.1.5, T.sup.R=R.sup.2SiO.sub.1.5, and Q=SiO.sub.2, where R.sup.1 represents a group selected from an alkyl group having 1 to 30 carbon atoms, and so on, R.sup.2 represents a hydrogen atom, and so on, a-1 represents an integer of 1 or more, b-1 and c-1 each represent an integer of 0 or more, and a-2, b-2, c-2, and d-1 each represent 0 or 1, provided that c-1, c-2, and d-1 are not simultaneously 0, a total of a-2, b-2, and c-2 is 1, and when b-1 is 0, a-1 is 2 or more and a total of c-1 and d-1 is 1 or more. There can be provided a novel mono-functional branched organosiloxane compound having a branched structure, and a method for producing the same.

An organosilicon compound with a primary amino-functional group is prepared. A catalyzed reductive amination process for combining a secondary imine-functional organosilicon compound with ammonia and hydrogen produces the primary amino-functional organosilicon compound.