Abstract: The present invention is related to a new scalable method of forming graphite oxide (only one or few layers of carbon atoms) of high purity (notably without metallic residues) and high oxidation degree from graphite flakes in a cost-effective and reduced environmental impact.

Abstract: The present invention is related to a new scalable method of forming graphite oxide (only one or few layers of carbon atoms) of high purity (notably without metallic residues) and high oxidation degree from graphite flakes in a cost-effective and reduced environmental impact.

Abstract: The invention relates to compounds of the formula (1) ##STR1## in which m is 0 or 1,R is a hydrogen atom or a group of formula ##STR2## T is either an (m+2)-valent aromatic group or a bisphenylene group, [Z] is a group of on average 1 to 10 structural units of the formula (3)--Q--T(OR).sub.1+m-r (EB).sub.r (3),in whichQ is a group of the formula (4) ##STR3## in which R.sup.0 is a phenyl radical substituted in a particular manner andR.sup.1 andR.sup.2 are C.sub.1 -C.sub.4 alkyl, and in which, furthermore,EB symbolizes a free valency of the group T,r has one of the values 0, 1 or 1+mand the structural units of the formula (3) are linked via their free valencies to the group [Z] such that the groups Q in each case alternate with groups T and the group [Z] overall is monovalent. As excellent flameproofing agents which are reactive towards epoxy compounds, the compounds are a useful formulation component for epoxy resin compositions.