34.
    发明专利
    未知

    公开(公告)号:DE59401273D1

    公开(公告)日:1997-01-23

    申请号:DE59401273

    申请日:1994-04-13

    Applicant: HOECHST AG

    Abstract: A filter material based on a polyarylene thioether having repeating units of the formula -[(Ar1)n-X)]m-[(Ar2)i-Y)]j-[(Ar3)k-Z)]l-[(Ar4)o-W)]p-(I) in which Ar1, Ar2, Ar3, Ar4, W, X, Y and Z, independently of each other, are identical or different, the indices n, m, i, j, k, l, o and p, independently of each other, are zero or integers 1, 2, 3 or 4, their sum being at least 2, Ar1, Ar2, Ar3 and Ar4 are arylene systems having 6 to 18 carbon atoms, and W, X, Y and Z are divalent linking groups, selected from -SO2-, -S-, -SO-, -CO-, -O-, -CO2-, or alkylene groups or alkylidene groups having 1 to 6 carbon atoms is suitable for removing ozone from gases or liquids. The removal proceeds quantitatively, no volatile products being formed.

    35.
    发明专利
    未知

    公开(公告)号:AT146093T

    公开(公告)日:1996-12-15

    申请号:AT94913593

    申请日:1994-04-13

    Applicant: HOECHST AG

    Abstract: A filter material based on a polyarylene thioether having repeating units of the formula -[(Ar1)n-X)]m-[(Ar2)i-Y)]j-[(Ar3)k-Z)]l-[(Ar4)o-W)]p-(I) in which Ar1, Ar2, Ar3, Ar4, W, X, Y and Z, independently of each other, are identical or different, the indices n, m, i, j, k, l, o and p, independently of each other, are zero or integers 1, 2, 3 or 4, their sum being at least 2, Ar1, Ar2, Ar3 and Ar4 are arylene systems having 6 to 18 carbon atoms, and W, X, Y and Z are divalent linking groups, selected from -SO2-, -S-, -SO-, -CO-, -O-, -CO2-, or alkylene groups or alkylidene groups having 1 to 6 carbon atoms is suitable for removing ozone from gases or liquids. The removal proceeds quantitatively, no volatile products being formed.

    Sensor for detecting oxidants
    37.
    发明专利

    公开(公告)号:DE4439765A1

    公开(公告)日:1996-05-15

    申请号:DE4439765

    申请日:1994-11-07

    Applicant: HOECHST AG

    Abstract: A sensor for oxidising agents is claimed and consists of an oxidisable aromatic polymer. Prodn. of a gas sensor having a porous polymer surface finish is also claimed, and comprises: (a) immersing the crystal initially in a solvent used for gas analysis of polymers, and then in a non-solvent, until all the solvent has been substd. by non-solvent and the non-solvent removed by drying, whereby the polymer remains in porous form on the surface of the crystal, or (b) (i) immersing the crystal in a polymer solvent which has good adhesion effect, (ii) drying, (iii) immersing in a suspension of porous particles used for gas analysis of polymers, and (iv) drying, whereby the porous particles are combined with the crystal over the intermediate layer. Further claimed is the prodn. of a polyarylene sulphide or polyarylene ether as an active component of the sensor.

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