(19)
(11) EP 0 957 212 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
05.09.2001 Bulletin 2001/36

(43) Date of publication A2:
17.11.1999 Bulletin 1999/46

(21) Application number: 99303741.5

(22) Date of filing: 13.05.1999
(51) International Patent Classification (IPC)7: E04C 2/04
(84) Designated Contracting States:
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
Designated Extension States:
AL LT LV MK RO SI

(30) Priority: 13.05.1998 GB 9810248

(71) Applicant: BPB plc
Slough, Buckinghamshire SL1 3UF (GB)

(72) Inventors:
  • Horsley, Stuart Edward Dr.
    Cropwell Butler, NottinghamshireNG12 3AB (GB)
  • Hazeldine, David John Dr.
    West Bridgeford, Nottingham NG2 5HU (GB)

(74) Representative: Marlow, Nicholas Simon 
Reddie & Grose 16, Theobalds Road
London WC1X 8PL
London WC1X 8PL (GB)

   


(54) Plasterboard


(57) A plasterboard comprising a layer 40 of phosphogypsum between layers 42, 42' of desulphogypsum is disclosed. A method of making such a plasterboard comprises forming a slurry of phosphogypsum, forming a slurry of desulphogypsum, and forming the slurries into a multi layer board.






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