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US 2002/0171164 A1Published application
Process and apparatus for making a thermoset foam
OwnerSteve Halterbaum, David G. Wernsinginventors
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Abstract
A thermosetting foam, preferably a polyurethane foam is prepare by mixing all the components in one or more extruders and directing the chemical streams to a mixing head where the catalyst is added. Thus, the reaction can be controlled in a facile manner, whereby clogging of the extrusion head is avoided.
Claims20
An apparatus for continuously manufacturing a thermoset polymer foam, comprising:
- at least one extruder for metering at least one chemical stream;
- a mixing head for continuously receiving and mixing at least two chemical streams, at least from said extruder;
- a conduit connected to the mixing head to supply a metered amount of catalyst;
- and
- a conveyor disposed below to receive a substantially homogeneous reacting chemical liquid from said mixing head, wherein said conveyor includes a frame defining a mold.
2 more elements
A method for continuously preparing a thermosetting polymer foam, comprising:
- introducing polyol into an extruder barrel;
- introducing an isocyanate into said extruder barrel;
- introducing filler particles into said extruder barrel;
- introducing a foaming agent into said extruder barrel;
- mixing said polyol with said isocyanate, said filler particles and said foaming agent in said extruder to form a chemical mixture;
- metering and supplying said chemical mixture to a mixing head;
- and
- introducing a catalyst to said mixing head, thereby reacting the isocyanate and polyol and initiating a foaming reaction.
5 more elements
Dependencies are inferred from the claim text.