Sanyo Chemical Industries, Ltd.

Yuichi Sasatani

Yasushi Kumagai

Jiro Ryugo

Tsuyoshi Tomosada

Kunikiyo Yoshio

Motonao Kaku

Toru Nakanishi

Tatsuroh Yanagi

Hajime Akiyama

Sadao Kubota

Sukeo Ban

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.

Material for forming resin suitable for cutting, molded resin product as raw material for model, and method for manufacturing model

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., or is useful as a soft polyurethane foam reduced in compression set and usable as a cushioning material, shock-absorbing material, sound insulating/absorbing material, etc.

Polyurethane foam, process for producing the same, and foam forming composition

Rigid foamed polyurethane-forming compositions, foamed polyurethane moldings and models made of the same

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.

Foamed polyurethane-forming composition, foamed polyurethane and process

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Kyoto, Japan

Yuichi Sasatani