Prepregs, towpregs and preforms
The present invention relates to prepregs, towpregs and preforms made from curable compositions of (a) benzoxazines, (b) a combination of adducts a first of which is prepared from hydroxy-containing compounds, isocyanate-containing compounds and phenolic compounds and the second of which is prepared from the first adduct and epoxy-containing compounds, (c) components reactive with the benzoxazine, such as epoxy resins, episulfide resins and oxetane resins, (d) tougheners, such as polyether sulfones, ATBN and core shell materials and (e) a silica component, where the silica has a mean particle diameter on the order of 10−9 meters.
Henkel Corporation
C C C C C C C C Y C Y C C C C C C C C C
C09J C09J C09J C08J C08K C08J C09J C08J Y10T C08L Y10T C09J C08K C08L C08J C08J C08K C08G C09J C08G
inventional additional additional additional additional inventional inventional additional additional inventional additional additional additional inventional additional inventional inventional inventional additional inventional
Raymond S. Wei Helen Stanley L.
Wong Li Lehmann