| 摘要 |
<p>Ethylene oxide/propylene oxide block copolymers having high cloud points, when compared to conventional rinse agent materials, have surprisingly been found to be useful in the manufacture of effective low foaming rinse aids. The rinse aids are prepared by combining the high cloud point copolymer with an effective defoamer and a water miscible diluent. The rinse aid composition can achieve adequate rinsing at common aqueous rinse temperatures at a concentration of the block copolymer in water less than 500 parts of the block copolymer per million parts of water. A liquid rinse agent concentrate can take the form of a low viscosity liquid, a thickened pourable or semi-pourable aqeous liquids. A solid rinse agent concentrate can be a cast solid material packaged within a soluble or disposable wrapper or capsule or other water soluble package. The rinse aids can be dispersed in a variety of ways by dilution with water to an aqueous final rinse composition. The uniqueness of the invention relates to the fact that all components are not expected to be active as sheeting agents and are approved as food additives thereby eliminating any health concerns associated with residual deposits of the composition on cleaned ware.</p> |
