Polyethylene oxide cake with reduced gelling for flush toilet wastewater sanitation
US4396522A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 13, 1981 |
| Grant date | Aug 2, 1983 |
| Priority date | — |
| Expiry date | May 13, 2001 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC11D17/0056
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Solid cake compositions comprising three essential components: polyethylene oxide resin, a nonsolvent resin coating liquid, preferably a perfume, and a surfactant. The components are mixed to form an extrudable mass and the mass is extruded into a log. The log is then cut or sliced into individual cakes. The compositions have reduced gelling characteristics, which reduce the tendency of the resin to form a gel when the cake is contacted with water. The cakes are useful in dispensers which are employed in the flush tank of a toilet to automatically dispense chemicals to the flush water. The polyethylene oxide resin dispensed into the wastewater minimizes aerosolization of the wastewater which occurs when the toilet is flushed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.