Evonik Roehm Gmbh

Evonik Operations Gmbh

Evonik Rohm Gmbh

Tim Denk

Thomas Richter

Kay Bernhard

Florian Becker

Felix Goldmann

Mathias Hempler

Ina Liebl

Ulrich Schmidt

The present invention relates to a method for cutting rigid foams, especially slabstock P(M)I foams. A method is provided here, by means of which it is possible to cut these rigid foams even in relatively high layer thicknesses of, for example, more than 3 mm, without material loss, which is produced in relevant amounts, for example, in the course of sawing as a result of the sawdust formed.

Splitting of thick hard-foam plates

The invention relates to a process for the production of mold-foamed poly(meth)acrylimide (P(M)I) cores, in particular of polymethacrylimide (PMI) cores, which can be used by way of example in automobile construction or aircraft construction. A feature of this process is that polymer granules or polymer powder preheated under pressure are moreover charged under pressure to a compression mold where they are foamed with depressurization. In particular, a feature of the process is that it optionally uses a preferably two-shell compression mold for the heating and also for the cooling of the granules and, respectively, the rigid foam core formed therefrom.

Pressure-dependent foam moulding of poly(meth)acrylimide particles in closed moulds for producing rigid foam cores

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Grosswallstadt, Germany

Tim Denk