PROCESS FOR PRODUCING A FOAMED ISOCYANATE-BASED POLYMER

A process for producing a foamed isocyanate-based polymer based on an amount of water and an amount of catalyst, the process comprising the steps of: providing a first stream comprising a particulate, non-cellular filler material surrounded by a mixture comprising less than 100% by weight of the amount of water and less than 100% by weight of the amount catalyst; providing a second stream comprising an active hydrogen-containing compound and the remainder of the amount of water and the amount of catalyst; providing a thin stream comprising an isocyanate; feeding each of the first stream, the second stream and the third stream-independently of one another to a mixing device; mixing the first stream, the second stream and the third stream in the mixing device to produce a reaction mixture; and allowing the reaction mixture to expand to produce the foamed isocyanate-based polymer. A system for alternating between production of filled or untilled isocyanate-base foam is also provided.