GB818810A - Bituminous compositions - Google Patents

Abstract

Copolymers of glycidy polyethers (1.2 epoxy equivalency greater than 1) of a polyhydric phenol with a polymerized conjugated fatty acid are obtained by precondensing the epoxy compound with the acid by preliminary heating in the absence of a catalyst, adding the catalyst, and further heating. For example, trimerized 9,11 octadecadienoic acids and liquid glycidyl polyether of 2,2 bis (4-hydroxyphenyl) propane are heated at 100 DEG C. and alpha methyl benzyl dimethylamine (as catalyst) then added with further heating at 100 DEG C. Specified phenols for preparing the polyethers are resorcinol; methyl resorcinol; catechol; hydroquinone; 4,41-dihydroxy benzophenone; bis (4-hydroxyphenol) methane; 1-1 bis (4-hydroxyphenyl) ethane, and isobutane; 2,2 bis (4-hydroxyphenyl) butane; 2,2 bis (4-hydroxy-2-methyl phenyl) propane; 2,2 bis (4-hydroxy 2-tertiary butylphenyl) propane; 2,2 bis (2-hydroxynaphthyl) pentane; and 1,5 dihydroxynaphthalene. The polymerized acids are prepared by heating, e.g. their lower aliphatic esters, and the monomer acids preferably have 16 to 24 carbon atoms, e.g. linoleic, linolenic, eleostearic and licanic acid.ALSO:A bituminous composition consists of an asphaltic bitumen and a copolymer of a glycidyl polyether, having a 1, 2 epoxy equivalency greater than 1, of a polyhydric phenol with a polymerized conjugated fatty acid. Between 0,5 and 75 per cent. of copolymer can be present. Preferably the epoxy and acid compounds are precondensed by heating in the absence of a catalyst the bitumen being present or not. Subsequently, heating is continued in the presence of a catalyst e.g. an amine. Amongst the phenols specified are mononuclear, e.g. resorcinol, and polynuclear ones, e.g. bis-phenol, the preferred polyethers being prepared from bis phenol. The polymerized acids are obtained from conjugated fatty acids by heating under known conditions, the monomers containing 16 to 24 C. atoms.