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    High-temperature foams with reduced resin absorption for producing sandwich materials
    8.
    发明授权
    High-temperature foams with reduced resin absorption for producing sandwich materials 有权

    公开(公告)号：US11485832B2

    公开(公告)日：2022-11-01

    申请号：US16767269

    申请日：2018-11-20

    申请人： Evonik Operations GmbH

    发明人： Christian Traßl ,  Thomas Richter

    IPC分类号： C08J9/232 ,  B29C44/26 ,  C08J9/36 ,  B29C44/34 ,  B29C44/44 ,  B29C67/20 ,  B29K79/00 ,  B29K81/00 ,  B29K105/04

    摘要： High-temperature foams are produced and used in the construction of aeroplanes, ships and rail and other vehicles. In particular, the foams are further processed into sandwich materials by joining with two outer layers. To this end, a novel process is used for producing high-temperature foams (HT foams) which are particularly suitable for producing such sandwich components for lightweight construction. This process achieves an improvement in the processability of the HT foams produced and a weight reduction of the sandwich materials. The HT foams are furthermore rigid particle foams which are markedly more economic to produce than rigid block foams. In particular, a reduction is brought about in resin absorption in fibre composite processes through a process-related optimization of the surface constitution.

    PESU PARTICLE FOAMS FOR APPLICATIONS IN AVIATION INTERIORS
    10.
    发明申请
    PESU PARTICLE FOAMS FOR APPLICATIONS IN AVIATION INTERIORS 有权

    公开(公告)号：US20210095092A1

    公开(公告)日：2021-04-01

    申请号：US15733134

    申请日：2018-11-19

    申请人： Evonik Operations GmbH

    发明人： Christian Traßl ,  Denis Holleyn ,  Kay Bernhard

    IPC分类号： C08J9/18 ,  C08J9/00 ,  C08J9/12 ,  C08J9/14

    摘要： Polymer foams based on polyethersulfone (PESU) fulfil the legal specifications demanded by the aviation industry for aircraft interiors. Specifically the demands on fire characteristics, stability to media and mechanical properties constitute a great challenge here. According to the related art, suitable polymer foams are produced as semifinished products. Reprocessing to give shaped articles is uneconomic in terms of time and material exploitation, for example by virtue of large amounts of cutting waste. The problem is solved by the material which is suitable in principle can be processed to give particle foam mouldings. These mouldings can be produced without reprocessing in short cycle times and hence economically. Furthermore, this gives rise to new means of functional integration, for example by direct incorporation of inserts etc. in the foam, and with regard to freedom in terms of design.