Abstract: A machinable resin molded product having a charge half-life of 1 to 60 seconds and a water content of 0.05 to 1.0 wt %, a model obtained by cutting the resin molded product, and a machinable resin-forming material comprising a hard resin component (A) and a non-silicone surfactant (B) are provided, whereby a machinable resin-forming material such that powder or dust generated from the same in a cutting process does not adversely affect electronically controlled circuits of a processing machine, thereby not causing malfunctions, accidental stops, etc. of the processing machine, a machinable resin molded product made of the foregoing resin-forming material, and a model obtained by cutting the molded product are provided.

Abstract: This invention relates to a machinable or grindable resin-forming material, comprising (A) a machinable or grindable resin or a precursor thereof, and (B) microcapsules comprising an encapsulated material (a) in liquid state and a wall material (b); wherein the machinable or grindable resin-forming material includes (B) at a ratio of 0.5 to 90 mass parts with respect to 100 mass parts of (A), and to a resin molded product for material of a model, which is formed by melting and solidifying or hardening and shaping the machinable or grindable resin-forming material. Accordingly, a machinable or grindable resin-forming material and a resin molded product for material of a model, in which the amount of scattering dust at the time of cutting or grinding the resin molded product is reduced, and a decrease in the strength is small, can be provided.

Abstract: A polyurethane foam which is obtained by reacting an addition-polymerizable active hydrogen component comprising a compound having a group containing active hydrogen and an addition-polymerizable functional group or comprising both this compound and a compound containing at least 2.5 groups (on the average) containing active hydrogen and not containing addition-polymerizable functional groups with an organic polyisocyanate in the presence or absence of at least one auxiliary selected from the group consisting of foaming agents and additives to polymerize the addition-polymerizable functional group and simultaneously form a polyurethane, and which has a structure in which the chains formed by the addition polymerization have been cross-linked to the polyurethane chains. The polyurethane foam is useful as a rigid polyurethane foam excellent in hardness, dimensional stability, etc. and usable as a heat insulator, shock-absorbing material, synthetic wood, etc.

Abstract: A polyurethane foam which is obtained by reacting an addition-polymerizable active hydrogen component comprising a compound having a group containing active hydrogen and an addition-polymerizable functional group or comprising both this compound and a compound containing at least 2.5 groups (on the average) containing active hydrogen and not containing addition-polymerizable functional groups with an organic polyisocyanate in the presence or absence of at least one auxiliary selected from the group consisting of foaming agents and additives to polymerize the addition-polymerizable functional group and simultaneously form a polyurethane, and which has a structure in which the chains formed by the addition polymerization have been cross-linked to the polyurethane chains. The polyurethane foam is useful as a rigid polyurethane foam excellent in hardness, dimensional stability, etc. and usable as a heat insulator, shock-absorbing material, synthetic wood, etc.

Abstract: A rigid foamed polyurethane molding which reduce dust-scattering in cutting and is useful to a modeling stock. Said molding is produced by curing a composition by a mechanical frothing method, said composition comprising: a polyol with a filler (c); and a slight amount of dehydrating agent (d); wherein said composition further contains 3 to 30 percent, based on the total weight of the composition, of a (poly) oxyalkylene compound (e) expressed by the general formula Z[(AO)mX]n in which “A” represents an alkylene group with two to four carbon atoms; “X” is a hydrocarbyl group or an acyl group; “m” is a value of one to one hundred; “n” is an integer of one to six; and “Z” is a residue produced by removing the active hydrogen atoms from a compound containing n active hydrogen atoms, in which at least one of Z and n X's has 5 to 20 carbon atoms.

Abstract: Foamed polyurethanes substantially free from non-uniform density distribution are obtained by dispersing an inert gas with mechanical stirring into a foamed polyurethane-forming composition containing substantially no blowing agent and comprising (1) an organic polyisocyanate component, (2) a polyol component comprising a high molecular weight polyol (A1) and a low molecular weight polyol (A2), (3) a dehydrating agent (B) and optionally organic microballoons, and curing the resulting composition containing therein the inert gas substantially homogeneously distributed. Foamed polyurethanes thus obtained are lightweight and of reduced warpage after processing and are suitable for model materials.