US 4,396,522 A · Polyethylene oxide cake with reduced gelling for flush toilet wastewater sanitation

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.

Claims22

Dependent claims

A solid cake composition comprising a matrix of the following components:

A. from about 5% to about 20% of a polyethylene oxide resin having a molecular weight of from about 500,000 to about 7,000,000;
B. from about 1.5% to about 30% of a nonsolvent coating liquid in a weight ratio of from about 0.3:1 to about 1.5:1 of said coating liquid to said resin;
C. from about 40% to about 93.5% of a synthetic surfactant which is substantially solid at about 25.degree. C. to about 50%;
wherein said coating liquid does not significantly solubilize said resin at a temperature of about 25.degree. C. to about 50.degree. C.;
and wherein the resin when mixed with said coating liquid is free-flowing;
and wherein said cake is made from a homogeneous mass of said A., B., and C.;
and wherein said homogeneous mass is extrudable at said temperature.

4 more elements

Dependencies are inferred from the claim text.

Polyethylene oxide cake with reduced gelling for flush toilet wastewater sanitation

Life of this patent

Polyethylene oxide cake with reduced gelling for flush toilet wastewater sanitation

Life of this patent

Abstract

Claims22