Phosphate ester coated hollow glass microspheres, resin compositions comprising such microspheres, and low density syntactic foams prepared therefrom

摘要

Hollow glass microspheres having surfaces coated with a phosphate ester and optional surface tension reducer are provided. By virtue of the presence of the phosphate ester and optional surface tension reducer, unexpectedly high volumes of such coated hollow glass microspheres can be utilized in resin compositions. Low density resin compositions containing high volumes of such coated hollow glass microspheres are also provided. This invention further provides new, lower density syntactic foams derived from these compositions. Still further, this invention provides low density epoxy resin compositions that comprise hollow glass microspheres, resins, resin curing agents and/or catalysts, and certain phosphate esters. By virtue of the low density of such compositions, new, lower density syntactic foams derived from these compositions can be attained and are provided.