초록 ▼

The invention is a paper coating system which introduces ASA particles having sizes in the sub-micron region into an emulsifier without shearing the emulsifier. The system has a continuous output－as distinguished from a batch system. The system comprises a variable speed low pressure starch metering

The invention is a paper coating system which introduces ASA particles having sizes in the sub-micron region into an emulsifier without shearing the emulsifier. The system has a continuous output－as distinguished from a batch system. The system comprises a variable speed low pressure starch metering pump, a variable speed high pressure ASA metering pump, a high pressure atomizing nozzle assembly, and a manifold which brings the starch and the atomized ASA flow together. The high nozzle pressure breaks up or atomizes the ASA into minute sub-micron particles that are evenly distributed throughout the starch to form a nearly perfect oil in water emulsion. By controlling the nozzle pressure, the proper particle size can be produced quite easily. An optical monitoring device that uses a coherent (laser) light source continuously measures and validates the quality of the ASA emulsion.

대표청구항 ▼

A method of preparing a polymer alkenyl succinic anhydride (“ASA”) comprising the steps of: A. supplying a blend of surfactant and ASA; B. imparting a high pressure and high shear to said blend of a surfactant and ASA; C. feeding back a first portion of said blend from an output of step B to an inpu

A method of preparing a polymer alkenyl succinic anhydride (“ASA”) comprising the steps of: A. supplying a blend of surfactant and ASA; B. imparting a high pressure and high shear to said blend of a surfactant and ASA; C. feeding back a first portion of said blend from an output of step B to an input of step B in order to recirculate said blend through said high pressure and said high shear step B; D. feeding a second portion of said output from step B to a first input of a manifold via a nozzle for atomizing said blend, said atomized blend appearing within said manifold; E. feeding a first stream of an emulsifier into a second input to said manifold, said atomized blend combining with said first stream of said emulsifier to form a mixture of ASA, surfactant, and emulsifier within said manifold; and F. feeding said mixture combined in step E into a second stream of said emulsifier to provide an outflow of prepared ASA, said outflow having a ratio of ASA to emulsifier set by the relative volumes of said first and second streams of said emulsifiers.