| 摘要 |
The invention comprises compositions containing (A) an alkaline builder, and (B) a blend of 10 to 80% by weight of the blend of a nonionic surfactant of the formula R(CH2CH2O)xH, where R is alkoxy, alkyl substituted amino or alkyl substituted phenoxy group, x is an average number of 1 to 30, and 90 to 20% by weight of the blend of a hydrotrope of the formula R1(CH2CH2O)yR2 where R1 is phenoxy substituted with a C6-C10 alkyl group or R1 is a C10-C18 alkoxy group, y is an average number of 1 to 20, R2 is a terminal group at least 90% of such groups being primary phosphate groups in acid or salt form, the remainder, if any, being hydrogen. Preferred alkaline builders are hydroxides, carbonates, silicates, phosphates or polyphosphates of sodium or potassium. Preferably, the compositions contain 75 to 99-5% by weight of alkaline builder and 25 to 0.5% by weight of the blend. Aqueous concentrates of the above compositions are specified, comprising 4 to 40% by weight of an alkaline builder, 0.5 to 40% of the blend, the solids content not exceeding 40% by weight. R2 may also be a secondary, tertiary or complex polyphosphate group. Specified hydrotropes include octyl-phenoxy polyethoxy phosphates and nonyl-phenoxy polyethoxy phosphates and specified non-ionic surfactants include octylphenoxy and nonyl-phenoxy ethylene oxide adducts, C13H27O(CH2CH2O)12H, t-C12- 15H25- 31 NHCH2CH2OH and t-C12- 15H25- 31NH(CH2CH2 O)10H. Many other examples of hydrotropes and non-ionic surface-active agents are given and examples of both aqueous and non-aqueous compositions are specified. |
