Patent · US Expired

Zeolite-based phosphate-free detergent builder composition

US5393455A · kind A · utility

11Cited by

8References

15Claims

0Family size

Assignee

Henkel Kommanditgesellschaft auf Aktien · DE

Inventors

Joerg Poethkow · Goldkronach, DE
Horst Upadek · Erkrath, DE
Eduard Smulders · Hilden, DE

Key dates

Filing date	Apr 26, 1993
Grant date	Feb 28, 1995
Priority date	—
Expiry date	Apr 26, 2013

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC11D3/128
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

Phosphate-free builder combinations containing zeolite, crystalline layer silicates corresponding to formula (I) NaMSi.sub.x O.sub.2x+1..sub.y H.sub.2 O, in which M is sodium or hydrogen, x is a number of 1.9 to 4 and y is a number of 0 to 20, and polymeric polycarboxylates may be used separately as water softeners or in detergents. Their primary and secondary detergent properties are so favorable that there is little or no need to use phosphonates.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.