公开(公告)号：DE3707691A1

公开(公告)日：1988-09-22

申请号：DE3707691

申请日：1987-03-11

Applicant: BASF AG

Inventor： KEMPTER FRITZ ERDMANN DR ,  MATEJCEK FRANZ DR ,  NEUBACH WERNER ,  BUSSE GERD

IPC: C08G6/02 ,  C08L61/00 ,  C08L61/02 ,  D04H1/4218 ,  D04H1/435 ,  D04H1/488 ,  D04H1/587 ,  D04H1/64 ,  D04H1/645 ,  D04H3/004 ,  D04H3/011 ,  D04H3/12 ,  D06M15/39 ,  D06M15/41 ,  D06M15/423 ,  D04H1/52

Abstract: Webs composed of inorganic or organic fiber material are bonded with a cured resin mixture consisting essentially of (A) from 5 to 80% by weight of a water-soluble condensation product of carbonyl number 0-200 which has been prepared by alkaline condensation from 0.1 to 0.4 mole of an aliphatic or cycloaliphatic condensable ketone and 1 mole of formaldehyde, and (B) from 20 to 95% by weight of a water-soluble amino and/or phenolic resin.

公开(公告)号：DE3561154D1

公开(公告)日：1988-01-21

申请号：DE3561154

申请日：1985-08-08

Applicant: BASF AG

Inventor： GOECKEL ULRICH DR ,  NEUBACH WERNER ,  ETLING HANS DR

IPC: B32B17/04 ,  C08G12/32 ,  C08G12/34 ,  C08G12/42 ,  C08J5/04 ,  C08J5/08 ,  C08L61/30

公开(公告)号：DE3346679A1

公开(公告)日：1985-07-04

申请号：DE3346679

申请日：1983-12-23

Applicant: BASF AG

Inventor： GOECKEL ULRICH DR ,  NEUBACH WERNER ,  FLORY KLAUS DR

IPC: C08G12/12 ,  C08G12/40 ,  C08L61/32

Abstract: The invention relates to a process for the preparation of water-dilutable, low-formaldehyde urea-formaldehyde condensates which have a low viscosity and a long shelf life by condensing urea and formaldehyde in a molar ratio of from 1:2.0 to 2.25 in the presence of alkali metal sulphite at a pH of from 9.0 to 10.5 and a temperature of from 80 DEG C to the reflux temperature, and subsequently continuing the condensation at a pH of from 4.0 to 6.0 and at from 70 to 95 DEG C, where from 0.01 to 0.03 mol of alkali metal sulphite are employed per mol of formaldehyde, the condensation at pH 4.0 to 6.0 is carried out with addition of from 0 to 0.2 mol of a water-soluble alkanol per mol of formaldehyde until infinite water-dilutability is just achieved, urea is subsequently added until the overall urea:formaldehyde molar ratio is from 1:1.60 to 1.95, and then from 0.01 to 0.04 mol of glyoxal are added per mol of formaldehyde, and to the use of the urea-formaldehyde condensates as binders for fibre nonwovens made from organic and/or mineral fibres.