Abstract: This invention concerns a method for the production of a porous polymer from a water-in-oil type high internal phase emulsion (HIPE). By using an oil-soluble polymerization initiator as the polymerization initiator, the method for producing a porous polymer with outstanding characteristics in a very short period even when the porous polymer is produced from an HIPE exhibiting a viscosity of not more than 500 mPa second at the emulsion formation temperature or when the porous polymer to be produced possesses a number-average pore diameter of not less than 80 &mgr;m is provided.

Abstract: An object of the present invention is to provide an absorbent structure, its production process, and an absorbent article comprising the absorbent structure, wherein, in the absorbent structure, a water-absorbent resin is fixed, and the restrictions, due to this fixation, on the swelling are small, and the absorbent structure is excellent in absorption properties and usable favorably for thin type absorbent articles in which the water-absorbent resin is used in an increased amount.

Abstract: A toning agent for an azo pigment, an azo pigment with a modified tone, and process for preparing the same are provide. 2-hydroxynaphthalene-3,6-dicarboxylic acid or a derivative thereof is admixed with a primary coupler component for an azo pigment and the mixed coupler composition and an aromatic diazonium are coupled.

Abstract: This invention concerns a method for the production of a porous polymer from a water-in-oil type high internal phase emulsion (HIPE). By using an oil-soluble polymerization initiator as the polymerization initiator, the method for producing a porous polymer with outstanding characteristics in a very short period even when the porous polymer is produced from an HIPE exhibiting a viscosity of not more than 500 mPa second at the emulsion formation temperature or when the porous polymer to be produced possesses a number-average pore diameter of not less than 80 &mgr;m is provided.

Abstract: This invention, with the object of producing a porous polymer from a water-in-oil type high internal phase emulsion, provides a method for the production of a porous polymer comprising a step of applying a physical treatment such as shaving to the surface of a porous polymer obtained by polymerizing the emulsion. By the physical treatment, it is made possible to diminish the difference in texture between the surface part and the inner part of the porous polymer and improve efficiently the absorption property of the porous polymer.

Abstract: Novel metal salts of binaphthol derivative are provided.

Abstract: Novel naphthol derivatives, and various azo compounds and metal complexes prepared by using the derivatives are provided.

Abstract: Novel naphthol derivatives, and various azo compounds and metal complexes prepared by using the derivatives are provided. The instant invention provides naphthol derivatives represented by general formula (1); wherein at least one of Y1 and Y2 is a group represented by formula (2); wherein X1 is —O—, —S— or —NH—; and Z is an optionally substituted aromatic group or heterocyclic group having conjugated double bonds, and salts thereof; mono-, bis-, and trisazo compounds prepared from the derivatives; and metal complexes containing the derivatives as the ligand.

Abstract: A diamide type azo compound represented by the general formula (I): which is derived from 2-hydroxy-3,6-dicarboxylic acid and at least one of the amide moieties in the compound is an aliphatic amide moiety, various use of the same and process for preparing the same are provided.

Abstract: An object of this invention is to provide a method for the production of a porous cross-linked polymer, which permits the polymerization (curing) of a water in oil type high internal phase emulsion (HIPE) in such an exceptionally brief time as not more than 30 minutes, preferably not more than 10 minutes without impairing the stability of the HIPE. The object of this invention mentioned above can be accomplished by a method for the production of a porous cross-linked polymer which comprises steps of mixing an oil phase containing a polymerizing monomer, a cross-linking monomer, and a surfactant as essential components with a water phase containing water as an essential component thereby obtaining a water in oil type high internal phase emulsion and heating said emulsion to a prescribed curing temperature thereby polymerizing the emulsion, wherein said emulsion is formed in a thickness of not more than 50 mm and the temperature-increasing rate of the emulsion is not less than 5° C./minute.

Abstract: This invention has for an object thereof the provision of a method for the production of a porous cross-linked polymer which can freely control the upper and lower surface behavior of the porous cross-linked polymer, the width and the thickness of the polymer and can perform continuously a process ranting from a step of supplying the emulsion through a step of polymerizing it. The object of this invention, in the production of a porous cross-linked polymer by polymerizing a water-in-oil type high internal phase emulsion, is accomplished by a method for the production of a porous cross-linked polymer characterized by performing continuously a process ranting from a step of supplying the emulsion through a step of polymerizing it while having the outer surface part of the emulsion retain an atmosphere or a state having a lower oxygen content than the ambient air.

Abstract: A novel compound represented by the general formula (1) or salts thereof. The compound is useful as a structural component of polymers such as polyesters and polyamides. The compound wherein Y1, Y2, Y3, and/or Y4 are carboxy groups is especially useful as a structural component of a liquid crystal polymer with improved weld strength and anisotropy.

Abstract: A naphthol derivative represented by the general formula (I), [wherein Y and Y′ indicate —(CONH)n—X or —COR; X is a phenyl group, a naphthyl group, an anthraquinonyl group, a benzimidazolonyl group or a carbazolyl group; R is a hydroxyl group, an alkoxy group having 1 to 6 carbon atoms, a halogen atom, a benzyloxy group, a phenyloxy group or a phenacyloxy group; R2 is a hydrogen atom, an alkaline metal, an alkyl group having 1 to 6 carbon atoms, an acyl group having 1 to 6 carbon atoms or a phenylalkyl group; Z is a group selected from the group consisting of a hydrogen atom, a halogen atom, a nitro group, a nitroso group and an amino group (Z may be substituted on any ring of the naphthalene ring); and n is an integer of 1 or 2; provided that R2 and Z do not simultaneously indicate a hydrogen atom when both R simultaneously indicate a hydroxyl group], and a process for producing the same.

Abstract: Novel water-soluble azo compounds useful as raw materials for preparing dyes excellent in dyeing properties and fastness and prepared from a coupler consisting of 2-hydroxynaphthalene-3,6-dicarboxylic acid or an ester thereof or an amide derivative of the same and a diazonium compound having a group of the general formula: —B—(CH2)2- Q or —B′—(CH2)2-Q′ (wherein B and B′ are each an electron-attracting group; and Q and Q′ are each a group capable of forming a vinyl group through the elimination with an alkali, provided the groups Q and Q′ are each bonded at the &bgr;-position of the ethyl group).

Abstract: The present invention relates to a novel 2-hydroxy-naphthalene-3,6-dicarboxylic acid derivative. The compound is useful as a raw material for dyes, pigments, photosensitive materials and the like.

Abstract: The present invention provides a bis (aminocarbonylnaphthol) derivative which is useful as a raw material for novel azo pigments by bisamidation of each one carboxyl group of two 2-hydroxynaphthalene-3,6-dicarboxylic acids using an aliphatic or aromatic diamine.

Abstract: The present invention provides novel water-soluble azo compounds derived from 2-hydroxynaphthalene-3,6-dicarboxylic acid or derivatives thereof and diazonium salts having sulfo group(s). These compounds are useful as raw materials for dyes having excellent dyeing properties and fastness.

Abstract: A polymer, a process for producing the same, and the use thereof. The polymer comprises structural units derived from an .alpha.,.beta.-unsaturated carboxylic acid monomer and structural units derived from another vinyl monomer, the polymer having (1) an acid value of 50 mgKOH/g or higher, (2) when analyzed with a differential scanning calorimeter, a differential curve having at least one peak top in each of the range of from -80 to 20.degree. C. and the range of from 20 to 120.degree. C., and (3) a parallel-ray transmittance of 80% or higher.

Abstract: The present invention provides novel condensed azo compounds using bisamide compounds of 2-hydroxynaphthalene-3,6-dicarboxylic acid, amide, or ester as the couplers, which have excellent properties such as excellent water resistance, chemical resistance, solvent resistance, and heat resistance.

Abstract: A monoazo compound synthesized using 2-hydroxynaphthalene-3,6-dicarboxylic acid (or salt thereof), an amide, an ureide or an ester thereof as a coupler is novel, and is superior in water resistance, chemical resistance and solvent resistance. The present invention provides such a novel azo compound and a process for producing the same.