Amphoterics as emulsifiers for bituminous emulsions

Amphoteric emulsifiers for anionic and cationic bituminous emulsions consisting of reaction products of nitrogen-containing intermediates with compounds selected from the group consisting of formaldehyde and sodium sulfite or bisulfite, chloroalkane sulfonic acid salts, .gamma.-propane sultone, chloromethane phosphonic acid, acrylic acid, fumaric acid, maleic acid and chloroalkanoic acids, wherein the nitrogen-containing intermediates are selected from the group of reaction products of polyamines reacted with sulfonated carboxylic acids and polyamines reacted with polycarboxylic acids corresponding to the formulae ##STR13## wherein x and y are integers from 3 to 9, x and y together equal 12, at least one Z is a carboxylic acid group and any remaining Z is hydrogen.