Coating use
Coating materials

Two-component Polyurethane Resins

Overview

These room temperature setting resins comprise a polyol base and a polyisocyanate curing agent which are mixed at the time of use. The polyols used include acrylic polyol with an intramolecular hydroxyl group, polyester polyol and polyether polyol.

Depending on the raw material isocyanate, there are various types of polyisocyanate prepolymers, including the TDI, MDI, XDI, IPDI and HDI types. Among them, the range of applications open to aromatic isocyanates such as TDI and MDI is generally limited because they turn yellow easily when exposed to UV light, but XDI, IPDI and HDI yellow with difficulty. They are used in a wide variety of applications including coatings and adhesives because physical properties such as curing characteristics, adhesion and plasticity can be altered freely through combinations of various polyols.

General-purpose type

These TDI adduct types are widely used in combination with various polyols in woodworking, construction and ink binders.

Quick-drying type

These TDI polymers dry faster than the general-purpose type. Various grades are available according to the required drying speed. We also provide types with other characteristics, including types that offer greater flexibility, higher compatibility with acryl and other bases, and improved weather resistance.

Non-yellowing type

Non-yellowing polyisocyanates are available for applications where weather resistance is particularly important, such as automobiles and construction exteriors. Customers can select from non-yellowing XDI, IPDI, HDI and other types depending on the required curing characteristics and physical properties. For cases where environmental friendliness is particularly necessary, we provide types that dissolve in poor solvents, and low-viscosity curing agents for used with high solids.

Water-dispersible type

As polyisocyanate compounds that have been given a nonionic hydrophilic group, the Takenate WD series of soap-free water dispersible polyisocyanates disperse readily in water. They allow crosslinked structures to be formed at room temperature through reactions with active hydrogen groups in the water. In combination with the Takelac series and other acrylic resins, they form crosslinked structures to enhance resistance to water and chemicals as well as adhesion to the base material.

Polyol

Polyester polyol, acrylic polyols and other polyols are compounds with several intramolecular hydroxyl groups. The hydroxyl groups react with the isocyanate groups to create a urethane bond. In addition, the special grades we offer include resins with good adhesion to polyolefins, and resins that contain strongly hydrophilic sulfobetaine groups and allow dispersion of ultrafine metallic particles, which generally disperse with difficulty.