Abstract: A resin composition for an ink jet recording sheet, an ink jet recording sheet, a method for ink jet recording, and a method for producing an ink jet recording sheet are provided, wherein an ink absorption ability and a blurring suppressive effect are satisfactorily achieved. The ink jet recording sheet is prepared from a substrate layer and an ink-receiving layer that is overlaid said substrate layer. The ink-receiving layer contains (1) a major component of a water-absorbing polymer compound represented by the formula (I), and (2) a cationic polymer compound. A mixing ratio by weight of the water-absorbing polymer compound (1) and the cationic polymer compound (2) may be in the range between 50/50 and 99/1. A cationic or nonionic surface active agent (3) may be contained in the ink-receiving layer in an amount from 1% by weight to 10% by weight.

Abstract: An object of the present invention is to provide a water-absorptive material having a satisfactory water-absorptivity in an ion-exchanged water as well as an ionic aqueous solution and also having a satisfactory thermoplastic moldability, and also to provide a water-absorptive molded product having an excellent fabricability including heat-sealability.Thus, the present invention provides a water-absorptive material crosslinked by irradiation with an ionizing radiation or ultraviolet rays, which comprises a hydrophilic high molecular compound having a weight average molecular weight of at least 10,000 obtained by reaction of (i) a polyalkylene oxide compound having an organic compound containing two active hydrogen groups addition-polymerized with an alkylene oxide comprising ethylene oxide as the main component and (ii) a polycarboxylic acid, a polycarboxylic acid anhydride, a lower alkyl ester of polycarboxylic acid or a diisocyanate.

Abstract: First of all, a high molecular sheet comprising a composite whose principal component is a special water soluble high molecular compound, or a multilayer sheet wherein a water soluble high molecular layer is piled on sheet material is prepared. Then, said sheet is layered on the entry side of a lamination substrate comprising insulating material and metallic foil. In this state, thru-holes are formed in the lamination substrate through said sheet. When forming thru-holes, said water soluble high molecular compound serves as a lubricant so as to extend drill life. In addition, it is possible to drill a lot of substrates, which are layered, at one time, resulting in the improvement of production efficiency.

Abstract: A water-soluble composite film including a special film mainly made of water soluble high molecular compound composed of a specific repetitive unit and a polyvinyl alcohol resin film layered thereon to be laminated. This composite film can be used as a packaging material for chemicals and the like with the above special film inside. Thus, this water soluble composite film can be employed as a unit package material for bactericide, insecticide, dyestuff, pesticide and the like, or as a packaging material for disposable commodities of laundry bags, sanitary napkins and the like.

Abstract: The invention relates to a method of improving the electric conductivity of resin. The method comprises compounding (A) a macromolecular compound obtained by crosslinking a polyether polyol and (B) a soluble electrolyte salt into matrix resin. The invention insures a marked improvement in the electric conductivity of resin without affecting its physical characteristics or causing an objectionable coloration.

Abstract: An antistatic and ionically conductive resin composition comprises:(A) 100 parts by weight of a resin,(B) 0.1 to 70 parts by weight of a high-molecular compound having an average molecular weight of not less than 10,000 prepared by reacting a polyoxyalkylene glycol with at least one of the polycarboxylic acids, polycarboxylic acid lower alkyl esters, polycarboxylic acid anhydrides and organic polyisocyanates, and(C) 0.1 to 30 parts by weight of an electrically conductive filler.

Abstract: A method of forming a protective coating on concrete or mortar construction which comprises coating said construction with a polyurethane coating composition comprising(A) a polyol component having an average hydroxyl number from 30 to 450 mg KOH/g, or a mixture of a polyol component and a polyamine component having the sum of average hydroxyl number and average amine number of from 30 to 450 mg KOH/g; and(B) an organic polyisocyanate curing agent, the proportion of said component (B) in terms of the NCO equivalent thereof relative to the active hydrogen equivalent of said component (A) being from 0.6 to 1.5.