Epoxy resin adhesives are cured with primary or secondary diamines. Epoxy-amine adducts are produced by the reaction of bis-phenol-A diglycidyl ether with a six — to eightfold molar excess of diamine. One-part systems are generally cured with dicyandiamide. A flexibilizing effect is obtained using longer-chain diamines such as polypropylene glycol diamine, amino terminated acrylonitrile-butadiene copolymers and amino amides. The latter are produced, for example, by the condensation of fatty acid dimers with diamines. Elastic bonds are obtained using higher-molecular-weight polythiols.

Вы можете оставить комментарий, или ссылку на Ваш сайт.

Оставить комментарий