Invention Grant
- Patent Title: Pressure-dependent foam moulding of poly(meth)acrylimide particles in closed moulds for producing rigid foam cores
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Application No.: US15321845Application Date: 2015-06-25
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Publication No.: US10207435B2Publication Date: 2019-02-19
- Inventor: Kay Bernhard , Ina Liebl , Tim Denk , Florian Becker , Thomas Richter
- Applicant: Kay Bernhard , Ina Liebl , Tim Denk , Florian Becker , Thomas Richter
- Applicant Address: DE Darmstadt
- Assignee: Evonik Roehm GmbH
- Current Assignee: Evonik Roehm GmbH
- Current Assignee Address: DE Darmstadt
- Agency: Oblon, McClelland, Maier & Neustadt, L.L.P.
- Priority: DE102014009338 20140627
- International Application: PCT/EP2015/064316 WO 20150625
- International Announcement: WO2015/197734 WO 20151230
- Main IPC: B29C44/14
- IPC: B29C44/14 ; B29C44/34 ; B29C44/44 ; C08J9/04 ; C08J9/232 ; B32B5/24 ; B32B7/12 ; B32B15/04 ; B32B15/18 ; B29K33/00 ; B29L31/30

Abstract:
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.
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