a curable composition that gives a cured product exhibiting a high refractive index and a surface without defects such as roughness or cracks, a cured product of the composition, and a compound that may be blended to the composition. In a curable composition including a triazine compound having three aromatic-ring-containing groups each bonded to the triazine ring via an amino group, an aromatic-ring-containing group having a specific structure having a radically polymerizable group-containing group or a cationically polymerizable group-containing group is used as at least one of the three aromatic-ring-containing groups bonded to the triazine ring in the triazine compound mentioned above.

There are provided a method of producing a carbonyl compound by a flow type reaction, including introducing a triphosgene solution into a flow channel (I), bringing the triphosgene solution into contact with a solid catalyst immobilized in at least a part of the flow channel (I) to generate a phosgene solution while the triphosgene solution is flowing through the flow channel (I), joining the phosgene solution and an active hydrogen-containing compound solution that flows inside the flow channel (II), which are subsequently allowed to flow downstream inside a reaction flow channel to be reacted in a presence of a tertiary amine, and obtaining a carbonyl compound in a joining solution; and a flow type reaction system that is suitable for carrying out this production method.

Novel tris-substituted biguanide compounds are made by reaction of sodium dicyanamide with a trifunctional primary amine followed by reaction with anilines. The tris-substituted biguanide compounds are potent biocide and useful as a disinfectant. The novel compounds have biocidal activity comparable to those of widely used chlorhexidine with respect to width of antibacterial spectrum and in immediate effectiveness. The novel tris-substituted biguanide compounds can also be used for cleaning wounds, preventing dental plaque, treating yeast infections of the mouth, and to keep urinary catheters from blocking, These novel compounds have superior aqueous solubility and bioavailability and have potent antibacterial activity especially against A. baumanni and K. pneumonia.

Disclosed are a low-migration hindered phenol antioxidant compound, a preparation method and a composition. During production, processing or use, polymers experience degradation due to factors such as light, oxygen and heat. The oxidation resistance thereof is often increased by adding one or more common antioxidants, thereby inhibiting and delaying the rate if oxidative degradation thereof. The structures of traditional hindered phenolic antioxidant compounds migrate in polymers. The hindered phenolic antioxidant compound of the present invention has more hindered phenol units, and can achieve the objectives of low extraction and low migration.

Disclosed are a low-migration hindered phenol antioxidant compound, a preparation method and a composition. During production, processing or use, polymers experience degradation due to factors such as light, oxygen and heat. The oxidation resistance thereof is often increased by adding one or more common antioxidants, thereby inhibiting and delaying the rate if oxidative degradation thereof. The structures of traditional hindered phenolic antioxidant compounds migrate in polymers. The hindered phenolic antioxidant compound of the present invention has more hindered phenol units, and can achieve the objectives of low extraction and low migration.

Non-halogenated melamine compounds for use as flame retardants are characterized by having a TGA.sub.25 value of at least 200 degrees Centigrade, a TGA.sub.50 value of at least 300 degrees Centigrade, or a TGA.sub.75 value of at least 500 degrees Centigrade, as measured on a thermogravimetric analysis (TGA) curve produced at a heating rate of 10 degrees Centigrade per minute and at a 60 mL/min oxygen or nitrogen flow, said compounds being small molecules, linear or branched polymers, or salts thereof.

The compound of Formula 1

##STR00001##

is obtained efficiently and cheaply from the mixture of tautomeric forms by crystallisation from methanol.

The compound of Formula 1

##STR00001##

is obtained efficiently and cheaply from the mixture of tautomeric forms by crystallisation from methanol.

Trisubstituted triazine antioxidants.

An object of the present invention is to provide a composition capable of forming a film having a high refractive index and excellent exterior characteristics. Another object of the present invention is to provide a film, a lens, and a solid-state imaging element in which the composition is used. Still another object of the present invention is to provide novel compounds. The composition according to an embodiment of the present invention contains a compound represented by General Formula (I), a solvent, and a resin, in which a solubility of the compound represented by General Formula (I) in the solvent is less than 0.5% by mass at 25° C., and a maximum absorption wavelength of the compound represented by General Formula (I) at a wavelength range of 300 to 800 nm is equal to or shorter than 450 nm.
AB-C).sub.n  (I)