Abstract: Overcoating agents and thermosetting resin compositions of the invention give protective layers that have excellent adhesion to substrates and in particular to tin, excellent long-term reliability of electric insulation and small warpage. A thermosetting resin composition according to the invention includes a carboxyl group-containing urethane resin (A), a curing agent (B) and an acid anhydride (C) as essential components. A flexible circuit board overcoating agent includes the thermosetting resin composition. A surface protective layer of the invention comprises a cured product of the thermosetting resin composition.

Abstract: A die set for press-forming a blank of thin metallic sheet. The die set has a punch and a blank holder. The blank holder has a first bead for restraining an edge of the blank with a constant force. The first bead is disposed further to an inside than a second bead for restraining the edge of the blank with a force that varies during pressing of the blank.

Abstract: A polymerization catalyst which exhibits a high activity and a good hydrogen response and thus is suitable for the production of an ethylene polymer having a wide molecular weight range can be obtained by a method using a chromium compound, an organic aluminum compound and a carrier and comprising the following steps (a) to (d): (a) contacting a chromium compound with a carrier in the presence or absence of a solvent; (b) adding an organic aluminum compound to said contacted substances at a temperature of not higher than 60° C. in an amount such that the mixing ratio of said organic aluminum compound to said chromium compound falls within the range of from 0.5/1 to 100/1 as calculated in terms of the ratio of aluminum atom/chromium atom (Al/Cr molar ratio) and that the following relationship (1) is satisfied: log10t≦0.33log10C+0.

Abstract: A blow-moldable or extrudable ethylene polymer having an excellent moldability which gives a molded product free of roughened surface, having: a number-average molecular weight Mn (V1) as determined from the amount of a terminal vinyl group by .sup.13 C-NMR measurement with respect to a fraction having a number-average molecular weight Mn of 100,000 according to GPC; and a number-average molecular weight Mn (V2) as determined from the amount of a terminal vinyl group by .sup.13 C-NMR measurement with respect to a fraction having a number-average molecular weight Mn of 10,000 according to GPC, Mn(V1) and Mn(V2) satisfying the following relationship:1.01.ltoreq.log.sub.10 {Mn(V1)/Mn(V2)}.ltoreq.3.0and having a melt flow rate (HLMFR) of from 0.1 to 70 g/10 min.

Abstract: A process for the production of ethylenic polymers is disclosed in which an ethylenic monomer is polymerized in the presence of a catalyst comprising a chromium compound, an alumoxane and an organometallic alkoxide and/or organometallic siloxide and a carrier supporting thereon these compounds. The resultant polymer has a balanced proportion of rigidity and environmental stress cracking resistance (ESCR) and an excellent moldability property.

Abstract: An applicator for applying a biocompatible adhesive containing human or aal protein as a principal ingredient to a surgical site of living body includes a housing to which a sterile gas is supplied, a sterile-gas supply tube connected to the housing, two adjacent sterile-gas ejecting nozzles for ejecting the sterile gas in the same direction, two adapters to which respective nozzles of syringe barrels are connected, and a pair of solution tubes, each having one end connected to the adapter and the other end protruded outwardly from the sterile gas ejection nozzle through an interior of the housing. Respective solutions supplied from the syringes via the pair of barrel adapters are ejected from the outlets of the solution tubes. The sterile gas is ejected from two sterile-gas ejection nozzles in the same direction. Consequently, the solutions are sprayed and mixed by the sterile gas, and then applied to the surgical site.

Abstract: An improved method for purification of HBs antigen comprising passing a partially purified HBs antigen prepared from blood plasma or serum through a column filled with an anion exchanger which may be equilibrated with a buffer solution having a specific ionic strength and pH level, and further passing the resulting effluent through a column filled with a cation exchanger which may be equilibrated with a buffer solution having a specific ionic strength and pH level. The HBs antigen obtained by the present invention is highly purified and is useful for preparing vaccine for preventing Viral Hepatitis Type B.