Abstract: The present invention is aimed at providing a waveguide coupling that enables two waveguides to be easily connected together while aligning cross sections of the two waveguides to hold central axes of the two waveguides concentrically with high accuracy. A coupling is for use in connecting two waveguides in an axial direction. The coupling includes a continuous body and a ring member. The continuous body is used to surround in a circumferential direction a connecting portion connecting the two waveguides. The continuous body includes seven partitioning bodies hinged at six portions by gudgeons to become continuous, and the partitioning bodies of end portions are connected together with screws, whereby the continuous body is formed annularly. The ring member has an annular shape, is disposed along a circumference of the waveguide, and is connected to the continuous body by screws.

Abstract: An improved pour spout member having a base attached to a packaging bag, a tubular neck having a tip opening sealed by a sealing member, and a lid member having an upper end connected to the sealing member and covering an outer periphery of the tubular neck. The lid member includes expandable lid segments having upper ends connected to a portion integral with the sealing member and, between the expandable lid segments in a collapsed state and a portion integral with the tubular neck, there is provided a rotation locking mechanism enabling temporary restriction of the lid member.

Abstract: [Problems to be Solved]: In the case of the pour spout member of prior art in which an inner stopple provided within the tubular neck must be by a handgrip attached to the inner stopple must be pulled out to open the pour spout. With such arrangement, there is a problem that not only operation of opening the pour spout is troublesome but it is sanitarily apprehended that the user's hand might come in contact with the pour spout. In the case of the pour spout member of prior art in which the sealing is broken by rotating the cap, there is anxiety that the cap might be unintentionally rotated, for example, in the course of transit.

Abstract: The present invention provides an emulsion for pressure-sensitive adhesive, and a pressure-sensitive adhesive product which exhibits high water resistance and high adhesion properties. The emulsion for pressure-sensitive adhesive includes as essential components: a pressure-sensitive adhesive polymer (A) having a glass-transition temperature of −80 to −20° C., a weight-average molecular weight of 150,000 or larger, and a carboxylic acid value of 30 or smaller; a rosin derivative (B) having a weight-average molecular weight of 100,000 or smaller, and containing at least part of the carboxyl groups being alkali salt with a carboxylic acid value of 190 or larger before alkalization; and a compound (C) having a weight-average molecular weight of 100,000 or smaller, and having no carboxyl group but having at least one functional group reactive with a carboxyl group in its molecule.

Abstract: The present invention discloses a water-dispersion type pressure-sensitive adhesive composition, a method for producing the same, and a pressure-sensitive adhesive product employng the same. With the present invention, the hydrophilic nature of dispersant (C) can be nullified by reacting a compound (B), containing a metal having a valence of at least two or having a specific functional group having reactivity, with the functional groups of dispersant (C), with the result that while being a water dispersion type pressure-sensitive adhesive composition, it displays excellent water resistance properties on a par with pressure-sensitive adhesives made from solvent type pressure-sensitive adhesive compositions.

Abstract: CMPO is safely, reliably and rapidly decomposed under mild conditions. A CMPO-containing substance is emulsified in an electrolyte comprising an oxidation promoter (silver ion) by an emulsifier in an emulsifying tank, this electrolyte comprising the CMPO-containing substance is supplied to an anode chamber, and an electrolytic oxidation reaction is performed by passing an electric current. By emulsifying the CMPO-containing substance, the surface area of CMPO in contact with electrolyte is increased, and electrolytic decomposition is thereby promoted. As sufficient CMPO decomposition is not obtained by passing the emulsion only once through an electrolysis tank 1, a batch oxidation method is employed wherein an anolyte is recirculated by a recirculating pump 3a through the anode chamber, a constant temperature bath 7a and an emulsifying tank 6, so that electrolysis is performed with the CMPO-containing substance permanently emulsified in the electrolyte.

Abstract: The present invention provides an acrylic polymer containing no surfactant, having little limitation in the polymer composition and being superior in heat resistance, processing operation performance and fluidity, and also provides use of the polymer and a production process. An acrylic polymer of present invention is obtained by the bulk polymerization, contains an acrylic acid-based monomer unit as a main component in its structure and has a Mn of 1,000 to 1,000,000, a glass transition temperature of -80.degree. C. or higher and a Mw/Mn ratio of 5 or less, and is appropriate for acrylic rubber, a pressure-sensitive adhesive, an alkali-soluble adhesive, an alkali-soluble film, an alkali-soluble injection molding or water ink. This polymer is produced by, in the presence of an inactive gas, carrying out the bulk polymerization of a starting material which contains a monomer component having an acrylic acid-based monomer as a main component and contains a sulfur compound of 0.

Abstract: An additive for paper production, comprising an amphoteric polymeric electrolyte having as an essential component thereof a structural unit represented by the following general formula I: ##STR1## wherein n is an integer in the range of 1 to 5, R.sup.1, R.sup.2, and R.sup.3 are independently hydrogen atom or an alkyl group, R.sup.4 is hydrogen atom, an alkyl group, or a hydroxyalkyl group, and a and b are jointly relative numerals such that the a/b ratio is in the range of 0.2 to 45.0), having at least part of the amino group of said amphoteric polymeric electrolyte neutralized, and possessing a cation equivalent amount (Cv) in the range of 1.0 to 15.0 meq/g, an anion equivalent amount (Av) in the range of 0.1 to 7.0 meq/g, and a Cv/Av ratio in the range of 0.2 to 45.0.

Abstract: A process for preparing 2-aminoethyl esters of methacrylic acid by the reaction of methacrylic acid with an aziridine compound in a reaction solvent consisting of water or an aqueous solvent.

Abstract: Methods are disclosed for the production of (I) a cationic water-soluble resin by the reaction of a polyethylene glycol polyhalohydrin ether resulting from the reaction between polyethylene glycol and an epihalohydrin with an aziridine compound and (II) and (III) cationic water-soluble resins by the reaction of (I) the resin with an epihalohydrin and/or a polyfunctional epoxy compound in the presence or absence of a polyalkyleneimine. The resins (I), (II), and (III) are stable over a wide range of pH value and are useful as a water-treating agent.