Production of a solids-containing pur spray jet
AssigneeBayer MaterialScience AG
InventorsHans-Guido Wirtz, Andreas Frahm, Frithjof Hannig, Stephan Schleiermacher
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Abstract
The present invention relates to a process for producing a solids-containing PUR spray jet and also to a spray attachment, wherein a solids-containing gas stream is introduced into a liquid jet of a PUR reaction mixture.
Claims19
A process for preparing a solids-containing PUR spray jet, characterized in that a solids-containing gas stream is injected into a liquid jet of a PUR reaction mixture.
A spray attachment for injecting a gas stream into a jet of a liquid PUR raw material, comprising
- a) a spray channel through which the jet of the PUR raw material flows;
- b) at least one gas channel through which the gas stream flows, leading into the spray channel through an entrance port;
- characterized in that
- the direction of flow of the gas stream when entering the spray channel runs outside the center of the spray channel.
The spray attachment according to any of claims 10 to 19, characterized in that the direction of flow of the gas stream undergoes a deflection by an angle of from 5 to 10°, preferably of 7.5°, towards the direction of flow of the PUR material before the gas stream enters the spray channel, especially shortly before it enters the spray channel.
Dependencies are inferred from the claim text.