Polyoxypropylene polyamine derivatives as defoamers
US4075130A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 30, 1976 |
| Grant date | Feb 21, 1978 |
| Priority date | — |
| Expiry date | Aug 30, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D3/0026
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Novel defoamer and foam inhibitor compositions comprising the reaction product obtained by alkoxylating a polyoxypropylene polyamine having a molecular weight of 190-3000 and selected from the group consisting of a polyoxypropylene diamine of the formula ##STR1## wherein x is an integer of from about 1 to about 40, and a polyoxypropylene triamine of the formula ##STR2## where x, y and z represent integers in the range of about 1 to 15, and the sum of x, y and z is from 3 to about 50, said alkoxylation being carried out with ethylene oxide and a higher alkylene oxide of three carbons or more in a manner such that said defoamer composition has a cloud point of 10-60.degree. C. Said defoamer compositions are particularly useful as a minor portion of a dishwater detergent, and can be used in defoaming and inhibiting foam formation and in diverse types of normally foamable systems, particularly aqueous systems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.