초록 ▼

In order to keep the reversing times from circulation of the reaction components to mixing and vice versa as short as possible for the purpose of good mixing in the initial and end phases in the preparation of flowable reaction mixtures by high-pressure mixing, the holding pressure applied to the fl

In order to keep the reversing times from circulation of the reaction components to mixing and vice versa as short as possible for the purpose of good mixing in the initial and end phases in the preparation of flowable reaction mixtures by high-pressure mixing, the holding pressure applied to the flow reversing element is maintained by a releasable non-return valve until the full hydraulic reversing pressure has built up on the opposite side, and only then is the non-return valve released.

대표청구항 ▼

In a process for the preparation of flowable reaction mixtures comprising at least two continuously flowing reaction components which are mixed under high pressure, in which the component mixing times alternate with non-mixing pauses during which each reaction component is separately recirculated, a

In a process for the preparation of flowable reaction mixtures comprising at least two continuously flowing reaction components which are mixed under high pressure, in which the component mixing times alternate with non-mixing pauses during which each reaction component is separately recirculated, and wherein the change from recirculation to mixing and the change from mixing to recirculation are effected and maintained by the hydraulic operation of at least one flow directing element, wherein the improvement comprises that during redirection of the flowing reaction components the hydraulic pressure maintaining an initial position of said at least one flow directing element is held until the hydraulic pressure for positioning the flow directing element is built up to a predetermined value, and only then is the hydraulic pressure maintaining initial position released and the flow directing element simultaneously moved to the alternate position.