Abstract: An insulating material comprising a cycloolefin polymer, specifically, an interlayer insulating material for a high-density assembly board having interlayer-connecting via holes at most 200 ?m in diameter, comprising a cycloolefin polymer containing at least 50 mol % of a repeating unit derived from a cycloolefin monomer; a dry film formed from a curable resin composition comprising a polymer having a number average molecular weight within a range of 1,000 to 1,000,000 as measured by gel permeation chromatography, and a hardener; and a resin-attached metal foil obtained by forming a film of a cycloolefin polymer on one side of a metal foil. Laminates, multi-layer laminates and build-up multi-layer laminates making use of these materials, and production processes thereof.

Abstract: An adhesive for semiconductor parts, comprising, as a base polymer, at least one cyclic structure-containing thermoplastic polymer selected from the group consisting of (a) a cycloolefin polymer and (b) an aromatic-condensed polymer having a repeating unit of an aromatic ring in its main chain, and having a number average molecular weight of 1,000 to 500,000, an adhesive sheet formed of the adhesive, a semiconductor part package making use of the adhesive, and a production process of the package.

Abstract: This invention provides a polymer dispersion composition obtained by dispersing a polymer having a gel content of 50% or more in an organic dispersion medium of which boiling point at 760 Kgf/cm3 is 80° C. or above. Said composition is successfully usable as, for instance, a binder composition for batteries, and the battery produced therefrom is high in initial capacity and small in the drop of capacity.

Abstract: Disclosed herein are a polymerized toner of core-shell structure, comprising core particles composed of colored polymer particles having a volume average particle diameter (dv) of 0.5-20 .mu.m and a ratio (dv/dp) of the volume average particle diameter (dv) to a number average particle diameter (dp) of at most 1.7, and shell which is formed of a polymer layer having an average film thickness of 0.001-0.1 .mu.m and covers each of the core particles, and a production process thereof.

Abstract: A photosensitive composition which comprises5 to 55 parts by weight of a linear block copolymer 1 consisting essentially of only one polymer block A which is a polymer consisting essentially of aromatic vinyl monomer units as the main constitutive units and conjugated diene monomer units as secondary monomer units, and only one or two polymer blocks B each of which is a polymer consisting essentially of conjugated diene monomer units as the main constitutive units and aromatic vinyl monomer units as secondary monomer units, wherein among all the monomer units the aromatic vinyl monomer units constitute 15 to 30% by weight, the conjugated diene monomer units constitute 85 to 70% by weight, the total amount of the aromatic vinyl monomer units and the conjugated diene monomer units being 100% by weight, and wherein the total amount of the aromatic vinyl monomer units constituting molecular chain portions each having 8 or more successive aromatic vinyl monomer units is 30% by weight or more of the amount of all t

Abstract: The present invention provides a magnetic recording medium excellent in S/N ratio and durability. The magnetic recording medium is characterized in that a magnetic powder having a relative surface area of at least 35 m.sup.2 /g and an average adsorption of myristic acid of up to 0.5 mg/m.sup.2 in methylethylketone solution of an average concentration of 0.6 g/100 ml, on the one hand, and a magnetic layer comprising a bond having at least one hydrophilic group selected from among SO.sub.3 M, SO.sub.4 M, PO.sub.4 M.sub.2 and N.sup.+ R.sup.1 R.sup.2 R.sup.3 X.sup.- and at least one reactive group selected from among hydroxide group, thiol group, amino group and epoxy group, on the other hand, is bridged by at least one briding agent selected from among polyisocyanate, polyamine and polythiol.

Abstract: A step pipette, which has a dosing rack and therein a dosing toothing, a strike meshing with the dosing toothing, a filling rack connected with the dosing rack by a gear, a striker spring as well as a release member for releasing the tension of the striker spring after the last full-lenght stroke. The solution ensures that also the last liquid dose is always full.

Abstract: The present invention discloses a magnetic recording medium comprising a substrate and a magnetic layer formed on at least one surface of the substrate, wherein said magnetic layer is constituted of a magnetic powder and a binder which contains an epoxy-containing vinyl chloride resin and a triazinethiol compound.