Invention Patent
- Patent Title: PRODUCTION OF PAPER, BOARD AND CARDBOARD FROM PAPER STOCKS CONTAINING FOREIGN MATERIALS
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Application No.: CA2034869Application Date: 1991-01-24
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Publication No.: CA2034869CPublication Date: 2001-08-14
- Inventor: FREUDENBERG ENRIQUE , LINHART FRIEDRICH , TRESCH RAINER , HARTMANN HEINRICH , DENZINGER WALTER , KROENER MICHAEL , SENDHOFF NORBERT
- Applicant: FREUDENBERG ENRIQUE , LINHART FRIEDRICH , TRESCH RAINER , HARTMANN HEINRICH , DENZINGER WALTER , KROENER MICHAEL , SENDHOFF NORBERT
- Assignee: FREUDENBERG ENRIQUE,LINHART FRIEDRICH,TRESCH RAINER,HARTMANN HEINRICH,DENZINGER WALTER,KROENER MICHAEL,SENDHOFF NORBERT
- Current Assignee: FREUDENBERG ENRIQUE,LINHART FRIEDRICH,TRESCH RAINER,HARTMANN HEINRICH,DENZINGER WALTER,KROENER MICHAEL,SENDHOFF NORBERT
- Priority: DE4002065 1990-01-25
- Main IPC: D21H21/04
- IPC: D21H21/04 ; D21H17/34 ; D21H17/37 ; D21H17/41 ; D21H21/10 ; D21H27/00 ; D21H17/45
Abstract:
Paper, board and cardboard are produced from paper stocks containing foreign sub- stances by drainage in the presence of a polymer which contains, as typical polymerized constituents, units of the formulae where R1 and R2 are each H, C1-C3-alkyl, and which have K values of not less than 130, the polymers containing less than 10 mol % of units of the formula II.
Public/Granted literature
- CA2034869A1 PRODUCTION OF PAPER, BOARD AND CARDBOARD FROM PAPER STOCKS CONTAINING FOREIGN MATERIALS Public/Granted day:1991-07-26
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