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Next-generation rigid foam systems

Presently, CP and HFC are used as the main foaming agents for the rigid polyurethane foam used as an insulating material across a wide variety of applications, such as in refrigerators and construction materials. However, as HFC has extremely high global warming potential, NPU set about developing a CP foaming system and completely water-based foaming system as next-generation rigid foam systems. These new systems are environmentally friendly and have an extremely low global warming potential.

Viscoelastic foam systems

We have developed a system for viscoelastic foam (MDI-based flexible urethane foam) that has the unique property of gradually recovering its shape from a compressed state, offers outstanding pressure dispersion, shock absorbency, and breathability, and does not harden at low temperatures. MDI is used as an isocyanate, which enables greater production efficiency and improvement in the work environment.

Powder slush resin

Using NPU proprietary manufacturing methods, we have developed a spherically shaped, thermoplastic micropowder polyurethane resin. This enables molecular design and particle-size control to achieve the moldability needed for powder slush molding and the properties the molded item needs to exhibit. Not only can this resin be used in areas involving conventional thermoplastic polyurethane resin, but also in material applications for the modification of various kinds of thermoplastic resin, as well as in the areas of coatings, adhesives, and binders.

Resin for microcellular elastomers

We have developed a high-performance urethane elastomer that has a very fine and uniform cell structure and that does not use chlorofluorocarbon as the foaming agent. With functionality including electrical conductivity, this elastomer can be used for all manner of molded items.

Reactive hot-melts

We have developed a solvent-free, one-component type of reactive hot-melt that improves on the problem of separation at high temperatures seen with ordinary hot-melt adhesives. Rather than using this as you would conventional hot-melts, this hot-melt is applied to the adherend. As the active hydrogen and moisture on the surface of the adherend react with the isocyanate groups, this hot-melt exhibits excellent, long-lasting adhesive strength, with no separation after adhesion, even with heating.

HDI-based non-yellowing TPUs

Through the combined use of HDI as the isocyanate ingredient and PCD as the polyol ingredient, we have developed a highly durable, thermoplastic polyurethane elastomer that is transparent and bloom-free, and both pliant and elastic. With these properties, it can be used for film and sheet applications where design flexibility is required.

Low-polarity solvent-soluble HDI-based hardening agents

We have developed a HDI-based hardening agent that is soluble in low-polarity solvent and that gives off few fumes and has excellent recoating properties. We also have solvent-free and low-viscosity types, which are suitable for use as high-solid paint and solvent-free paint hardening agents for building exterior and anti-corrosive coating applications.

Water-borne resins and water-borne hardening agents

In response to the growing demand over recent years for high-performance, environmentally friendly products, we have developed high-performance water-borne polyurethane dispersions (PUD) that offer superior coated film transparency through the use of a polycarbonate skeleton, as well as compatible water-borne hardening agents for such. By using the properties of water-borne PUDs and (1) employing a highly cross-linked resin structure, and (2) controlling the nano-order soft segments and hard segments, this has made it possible to control coated film hardness and provide durability above and beyond that of solvent-based products.

Liquid polycarbonate diol (PCD)

We have developed a liquid PCD that makes up for the lack of ductility in conventional PCDs without sacrificing durability. It can be used as a raw material for polyurethane resin products, including synthetic leather, artificial leather, coating agents, paints, adhesives, elastomers, and thermoplastic resins.