公开(公告)号：DE3152005A1

公开(公告)日：1983-07-07

申请号：DE3152005

申请日：1981-12-31

Applicant: BASF AG

Inventor： AICHER ALBRECHT ,  PETRI NORBERT DIPL CHEM DR ,  REUSS GUENTER DIPL CHEM DR ,  SEBASTIAN ROBERT

IPC: C07C45/38 ,  C07C45/78 ,  C07C47/04 ,  C07C47/058 ,  C07C127/17 ,  C08G12/36 ,  D21H3/52 ,  D21H5/00

公开(公告)号：DE2332046A1

公开(公告)日：1975-01-23

申请号：DE2332046

申请日：1973-06-23

Applicant: BASF AG

Inventor： GUENDER WOLF DIPL CHEM DR ,  REUSS GUENTER DIPL CHEM DR

IPC: C08G12/32 ,  D21H17/51

Abstract: The process comprises precondensing melamine and HCHO (or a cpd forming HCHO) in an aqs. suspension at pH 4-9; followed by treatin gthe precondensate with excess HCHO in above pH range and finally acidifying the condensate suspension with HCl or an aliphatic carboxylic acid with apKa =3.5 and/or phosphoric acid. The soln. is storage stable for >=6 months without gelling and when incorporated in paper gives a prod. with superior wet strength than when prior art resins (as prepd by US 2986489) are used.

公开(公告)号：DE3213227A1

公开(公告)日：1983-10-13

申请号：DE3213227

申请日：1982-04-08

Applicant: BASF AG

Inventor： REUSS GUENTER DIPL CHEM DR ,  PETRI NORBERT DIPL CHEM DR ,  LEHMANN GUNTER DIPL ING ,  PITTEROFF WALTER DIPL CHEM DR

IPC: B01J21/06 ,  B01J21/08 ,  B01J23/50 ,  B01J23/72 ,  B01J23/89 ,  B01J27/18 ,  B01J37/02 ,  C07C45/38 ,  C07C47/055

公开(公告)号：DE2442760A1

公开(公告)日：1976-03-18

申请号：DE2442760

申请日：1974-09-06

Applicant: BASF AG

Inventor： REUSS GUENTER DIPL CHEM DR

IPC: D06M15/423 ,  C07D251/64 ,  D06M15/58