Bitumen Emulsion Containing Polyaluminum Compounds

摘要

The invention relates to an additive for a bitumen emulsion, which is a specific mixture of alkoxyiated compounds with low and high amounts of alkylene oxide units, in combination with a polyaluminum compound. Using this additive it is possible to prepare an aqueous slow-setting bitumen emulsion-aggregate mix suitable for cold paving of roads, parking places, sidewalks, and the like.

主权项

1. An additive for a bitumen emulsion comprising
i) a polyaluminum compound; ii) an alkoxylated amine having the formula:where R is a hydrocarbyl group having from 10 to 24 carbon atoms; n=0-3; each AO is independently ethyleneoxy or propyleneoxy, Y is a hydrocarbyl group having 1-24 carbon atoms, or a group (AO)xH; and the sum of all x in (I) is 0.5-10; and
iii) an alkoxylated compound having the formula:where R′ is a hydrocarbyl group from 8 to 24 carbon atoms; X is N, C(═O)O or O; s=0-3; p=0 or 1; provided that when X is N, then p is 1 and when X is C(═O)O or O, then p is 0; and Z is a hydrocarbyl group having 1-24 carbon atoms, or a groupwhere each AO independently is ethyleneoxy or propyleneoxy, and the sum of all y in (II) is from 12 to 200; or castor oil that has been alkoxylated 12 to 200 moles of ethylene oxide and/or propylene oxide per mole of castor oil (III).