EP 0036993 B1 19831019 - PROCESS FOR ENNOBLING PAPER AND PAPER-BOARD
Title (en)
PROCESS FOR ENNOBLING PAPER AND PAPER-BOARD
Publication
Application
Priority
DE 3012002 A 19800328
Abstract (en)
[origin: EP0036993A1] 1. Process for improving the strength of paper, board or card materials by treating the surface of these materials with aqueous solutions of copolymers of (meth)acrylic acid derivatives and optionally customary additives, characterized in that the copolymers used are copolymers of 1. 0.1-10 % by weight of acrylonitrile, 2. at least 30 % by weight of acrylamide and 3. 30-60 % by weight of acrylic acid and/or methacrylic acid, which can optionally be present entirely or partially in the form of their ammonium salt.
IPC 1-7
IPC 8 full level
D21H 17/34 (2006.01); D21H 17/43 (2006.01); D21H 19/20 (2006.01)
CPC (source: EP)
D21H 17/43 (2013.01)
Citation (examination)
- FR 2108635 A5 19720519 - NITTO CHEMICAL INDUSTRY CO LTD, et al
- DE 2741753 B1 19790322 - BASF AG
- US 2999038 A 19610905 - DRENNEN THOMAS J, et al
Designated contracting state (EPC)
AT BE CH DE FR LI NL
DOCDB simple family (publication)
EP 0036993 A1 19811007; EP 0036993 B1 19831019; AT E5089 T1 19831115; DE 3012002 A1 19811008; DE 3161211 D1 19831124; JP S56148995 A 19811118
DOCDB simple family (application)
EP 81101918 A 19810316; AT 81101918 T 19810316; DE 3012002 A 19800328; DE 3161211 T 19810316; JP 4260781 A 19810325