Abstract: A near infrared ray activation type positive resist composition comprising (A) a vinyl-based polymer having a monomer unit having an alkali-soluble group blocked by an ether having an alkenyl group next to an ether oxygen, (B) a photothermal converting substance generating heat by a light in the near infrared region, (C) a thermal acid generator generating an acid by heat, can provide a near infrared ray activation type positive resist composition which can be subjected to an exposure treatment in a complete bright room such as under a white light and the like, gives desired sensitivity and resolution, and of which baking treatment conditions can be relaxed or a baking treatment can be omitted, and a pattern formation method using the same.

Abstract: A near infrared ray activation type positive resist composition comprising (A) a vinyl-based polymer having a monomer unit having an alkali-soluble group blocked by an ether having an alkenyl group next to an ether oxygen, (B) a photothermal converting substance generating heat by a light in the near infrared region, (C) a thermal acid generator generating an acid by heat, can provide a near infrared ray activation type positive resist composition which can be subjected to an exposure treatment in a complete bright room such as under a white light and the like, gives desired sensitivity and resolution, and of which baking treatment conditions can be relaxed or a baking treatment can be omitted, and a pattern formation method using the same.

Abstract: An object of the present invention is to provide a solution-type paint excellent in acid resistance or the like. Specifically, the present invention provides a solution-type paint comprising a polymer having an epoxy group and branched glutaric acid, a coating film obtained by curing the solution-type paint, a composition comprising a polyether having an epoxy group, a polyester having an epoxy group or a polyether/polyester (a polymer having an ether linkage and an ester linkage in a molecule) having an epoxy group and branched glutaric acid, and the like. Examples of the polymer having an epoxy group include a vinyl copolymer having an epoxy group, and examples of the branched glutaric acid include 2,4-dialkylglutaric acid.

Abstract: The present invention provides a polyester and a polyurethane each having, in the molecule, a structural unit represented by formula (I): (wherein, R1, R2, R3, R4, R5and R6, which are the same or different, each represent a hydrogen atom or lower alkyl, provided that at least one of R1, R2, R3, R4, R5 and R6 is lower alkyl), and being excellent in hydrolysis resistance.

Abstract: By allowing a compound having an epoxy group in a composition containing at least a polymer or compound having a five-membered ring dithiocarbonate group represented by the following general formula (I) and a nucleophilic reagent, or in a cured article obtained by curing the composition, it is possible to inhibit emission of odors from the composition or the cured article, wherein R1, R2 and R3 are the same or different and each represents a hydrogen atom or a lower alkyl group.

Abstract: An object of the present invention is to provide a composition which affords a hardened product exhibiting superior electrical insulating properties, adhesiveness, or the like at the time of hardening the composition.

Abstract: The object of the present invention is to provide resin compositions conferring cured materials (a coating or the like) with excellent appearance, excellent mechanical properties, or the like. The present invention provides resin compositions containing a vinyl copolymer with an epoxy group and a branched glutaric acid.

Abstract: The present invention provides a process for producing polyhydroxycarboxylic acids which comprises subjecting at least one hydroxycarboxylic acid or oligomer thereof to polycondensation in the presence of an alkali metal compound, an alkaline earth metal compound, or a compound of a metal of Group IIIb of the periodic table. The polyhydroxycarboxylic acids obtained by the process have a weight-average molecular weight of 30,000 or above and are useful as biodegradable plastics for food-wrapping films, drug delivery systems, etc.

Abstract: The object of the present invention is to provide resin compositions conferring cured materials (a coating or the like) with excellent appearance, excellent mechanical properties, or the like. The present invention provides resin compositions containing a vinyl copolymer with an epoxy group and a branched glutaric acid.

Abstract: The present invention relates to a diglycidyl ether represented by the following general formula (I): ##STR1## (wherein, R.sup.1 and R.sup.2 are the same or different, and represent lower alkyl having 1.about.6 carbon atoms), a composition including the glycidyl ether and epoxy resin, and epoxy resin cured product obtained by the composition. The glycidyl ether can be used as a reactive diluent for epoxy resins.

Abstract: The present invention provides a process for producing polyhydroxycarboxylic acids which have a weight-average molecular weight of 50,000 or above and which are excellent as biodegradable plastics by polycondensing hydroxycarboxylic acids or oligomers thereof in the presence of an inorganic solid acid catalyst in combination with an alkali metal or an alkaline earth metal.

Abstract: The present invention provides a process for producing polyhydroxycarboxylic acids having a weight-average molecular weight of 50,000 or above which are excellent as biodegradable plastics by subjecting Lactides to ring-opening polymerization in the presence of an inorganic solid acid catalyst carrying silica and/or a light metal.

Abstract: Disclosed is a process for producing a composition for ruminants, which is characterized in that a nucleus containing a physiologically active substance is coated with a coating material prepared by suspending in water (i) an emulsion comprising water and at least one hydrophobic substance hardly soluble in water and (ii) a slurry containing at least one polymer soluble in water of pH 5.0 or below and insoluble in water of pH over 5.0 In the process, an aqueous suspension is used for coating instead of a meterial dissolved in an organic solvent.

Abstract: By coating a solid fertilizer with a coating material comprising an aqueous emulsion of resin as the main component to form a resin film having a glass transition temperature of 60.degree. C. or higher; or by coating a solid fertilizer with a coating material comprising an aqueous emulsion of a thermoplastic resin and a melamine resin, and heating the coated fertilizer at 70.degree. C. or higher; a gradually-effective, coated fertilizer having a distinguished gradual releasability and strong resistance to caking, which have been so far regarded as difficult to be obtained in an aqueous emulsion system, can be prepared.

Abstract: A fan blade in which a leading edge piece made of a hard sintered product is attached to the leading edge of a fan blade main body over along substantially 3/4 to 1/4 from the tip thereof so that a useful life of the fan blade is prolonged.