Method and mixing head for producing a reaction mixture from...

Details Method and mixing head for producing a reaction mixture from... Method and mixing head for producing a reaction mixture from...

B - Operations, Transporting

29

B

B29B 7/76 (2006.01) B01F 5/04 (2006.01) B29C 67/24 (2006.01) C08G 18/08 (2006.01)

Patent

CA 2280864

Disclosed is an agitator-free mixing head and a method for agitator-free production of a reaction mixture from an isocyanate and a higher-viscous polyol formulation, wherein both constituents are fed to a mixing zone and mixed with each other therein, whereby a polyol formulation with a viscosity of at least 3000 mPa.s is fed at low pressure into the mixing zone and at least two flows of low-viscosity constituents (isocyanate and optionally low- viscous polyol) are injected into the flow of high-viscous polyol formulation at high pressure.

L'invention concerne un procédé permettant de préparer, sans utiliser d'agitateur, un mélange réactionnel à base d'un isocyanate et d'une formulation polyol à haut degré de viscosité, ainsi qu'une tête mélangeuse sans agitateur. Les deux constituants du mélange réactionnel sont acheminés jusqu'à une zone de mélange où ils sont mélangés. Une formulation polyol présentant une viscosité d'au moins 3000 mPa.s est introduite sous basse pression dans la zone de mélange et au moins deux courants de constituants à faible degré de viscosité (isocyanate et éventuellement polyol à faible degré de viscosité) sont injectés sous haute pression dans le courant de la formulation polyol à haut degré de viscosité.

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