| 摘要 |
The viscosity of concentrated liquid detergents with high concentrations of surfactant and no more than 5% by weight of swelling clay, may be reduced if the concentrate comprises less than 15% by volume of suspended solid material and is formulated thus:- (a) at least 15% by weight of detergent active material; (b) from 1 to 30% by weight of a salting-out electrolyte; (c) from 0.1 to 20% by weight of a viscosity reducing water soluble polymer in an amount sufficent to reduce the viscosity by more than 5% when measured at a shear rate of 21 S<-><1> and in comparison with a composition indentical except that all such polymer is omitted, said polymer having an electrolyte resistance of more than 5 grams sodium nitrilotriacetate in 100ml of a 5% by weight aqueous solution thereof, with the system adjusted to neutral pH, and said polymer having a vapour pressure in 20% aqueous solution equal to or less than the vapour pressure of a reference 2% by weight or greater aqueous solution of polyethylene glycol having an average molecular weight of 6000; said viscosity reducing polymer having molecular weight of at least 1000. o |
