Takeda Chemical Industries, Inc.

Koichi Shibata

Ichiro Minato

Kimiya Fujinami

Kyuya Yamazaki

Sachio Igarashi

Itsuo Furuoya

Disclosure is a novel hardening agent for epoxy resins which has quick cold hardening ability and high safety for human bodies. This hardening agent has the general formula: ##STR1## Epoxy resins hardened with this hardening agent have excellent mechanical properties at high temperatures.

Epoxy resin hardening agents

The present invention provides novel triisocyanate compounds of the formula: ##STR1## wherein ##STR2## stands for ##STR3## the production thereof and the use thereof for polyurethane resins, especially, for solvent-free or high solids polyurethane coatings.

Triisocyanates and their production and use

Disclosed is a novel polyglycidyl compound useful as polyfunctional epoxy resins excellent in adhesion, heat resistance and strength. This novel polyglycidyl compound has the general formula: ##STR1## (wherein ##STR2## A method for producing this polyglycidyl compound is also disclosed.

Polyglycidyl compounds

Disclosed is a novel triamine derivative, particularly a ketimine or aldimine derivative derived from a triamine and a ketone or an aldehyde, which has the following general formula: ##STR1## [wherein ##STR2## X is hydrogen or a hydrocarbon radical of 1 to 8 carbon atoms; Y is a hydrocarbon radical of 1 to 8 carbon atoms; X and Y, together with their neighboring carbon atom, may form a 5- to 7-membered aliphatic hydrocarbon ring; and n is an integer of 1, 2 or 3]. This novel triamine derivation is useful as a curing agent for epoxy resins or polyurethane resins.

Aldimines and ketimines of 1,3,5-(aminomethyl)benzene or cyclohexane and

A composition for polyurethane adhesives comprising (1) a triisocyanate of the formula: ##STR1## wherein ##STR2## a modified product of said triisocyanate or an adduct of said triisocyanate having terminal isocyanate groups and (2) an active hydrogen compound exhibits excellent adhesion, especially between polyethylene terephthalates, polyolefins and metals, heat resistance and weatherability, and has low toxicity and can be solventless or light solid.

Composition for polyurethane adhesives

The present invention provides novel triisocyanate compounds of the formula: ##STR1## the production thereof and the use thereof for polyurethane resins, especially, for solvent-free or high solids polyurethane coatings.

Growing community of inventors

Ashiya, Japan

Koichi Shibata