公开(公告)号：DE19917966A1

公开(公告)日：2000-08-10

申请号：DE19917966

申请日：1999-04-21

Applicant: BASF AG

Inventor： WEBER ENGELBERT ,  MUEHLTHALER WOLFGANG

IPC: C08G12/12 ,  C08G14/08

Abstract: A process for the continuous production of an aqueous solution of a urea-formaldehyde-precondensate (I) from formaldehyde, urea and water in an at least 4-stage reactor is claimed. A process for the continuous production of an aqueous solution of a urea-formaldehyde-precondensate (I) from formaldehyde, urea and water in an at least 4-stage reactor is claimed. The starting materials are continuously fed to the first reactor at the same rate at which the reaction mixture formed is removed and fed to the next reactor in the series. In the last reactor the aqueous solution of (I) is continuously removed at the same rate at which the reaction mixture is continuously supplied from the penultimate reactor.

公开(公告)号：DE4011159A1

公开(公告)日：1991-10-10

申请号：DE4011159

申请日：1990-04-06

Applicant: BASF AG

Inventor： MATTHIAS GUENTHER DR ,  WEBER ENGELBERT ,  DIEM HANS DR

IPC: C08G12/38 ,  C08L61/30 ,  C08L97/02

Abstract: Aq. amino resins (I) contg. 60-75 wt.% solids are claimed; (I) are obtd. by heating a mixt. of (A) 60-98 wt.% aq. UF precondensate and (B) 2-40 wt.% M/UF precondensate for 10-45 mins. at 70-100 deg.C and pH 7.5-9; (A) is derived from (a1) 30-50 mol.% urea, (a2) 50-70 mol.% formaldehyde (F) and (a3) 0-2 mol.% other condensable components, and (B) is derived from (b1) 15-35 wt.% melamine, (b2) 10-15 mol.% urea, (b3) 55-70 mol.% (F) and (b4) 0-2 mol.% other condensable components; the theoretical mol. ratio (F):(amino gps. in I) is (0.45-0.6):1, and this condition is fulfilled if necessary by addn. of urea after heating (A) and (B). - 2. The above process is claimed as such.

公开(公告)号：AT12120T

公开(公告)日：1985-03-15

申请号：AT82103007

申请日：1982-04-08

Applicant: BASF AG

Inventor： DUDECK CHRISTIAN DR ,  WEBER ENGELBERT ,  DIEM HANS DR ,  WITTMANN OTTO

IPC: C08G12/38 ,  C08G12/42 ,  C08L61/30 ,  C08L97/02 ,  C09J161/30 ,  C09J3/16

公开(公告)号：DE3046033A1

公开(公告)日：1982-07-15

申请号：DE3046033

申请日：1980-12-06

Applicant: BASF AG

Inventor： DUDECK CHRISTIAN DIPL CHEM DR ,  WEBER ENGELBERT ,  DIEM HANS DIPL CHEM DR ,  MAYER JOHANN DIPL CHEM DR ,  WITTMANN OTTO ING GRAD ,  LEHMANN GERHARD J DIPL CHEM DR

IPC: C08G12/12 ,  C08G12/42 ,  C09J161/24 ,  C09J161/32 ,  C09J3/16

公开(公告)号：DE3783192D1

公开(公告)日：1993-02-04

申请号：DE3783192

申请日：1987-08-25

Applicant: BASF AG

Inventor： WEBER ENGELBERT ,  DIEM HANS DR ,  MUEHLTHALER WOLFGANG ,  MATTHIAS GUENTHER DR

IPC: C08G12/12 ,  C08G12/32 ,  C08G14/06 ,  C09J161/34

Abstract: The resins (I), with molar ratio U:F 1:1.0-1:2.1 and solids content 58-75 wt.% on total wt. (I) are prepd. by 1) thin layer-evaporating UF precondensate with solids content 38-55 wt.% on wt. (I) to solids content 58-72 wt.% 2) returning 10-60 wt.% prod. to thin layer-evapn. 3) adding aq. U soln. then 4) flash-evaporating prod. directly (i.e., within interval so short that no substantial reaction occurs between U added in 3) and condensate). Opt. UF precondensate is also prepd. with melamine and/or phenol, opt. as precondensates with HCHO. Interval between 3) and 4) is 0.5-5, partic. 1.8-2.5, seconds. Thin layer evapn. is effected in one or more consecutive or parallel stages, partic. in 2 or 3 stages with prod. being returned in each stage. Average film thickness in falling film evaporator(s) is about 1.5 mm, average residence time is 1-10 minutes. Thin film evapn. is carried out with steam at 2-6 bar. Soln. is evaporated at 48-100 deg.C. Mixing is provided between 3) and 4). U soln. in 3) is 60-72 wt.%. Returned part of soln. is treated with 60-72 wt.% soln. of U before again subjecting to thin layer evapn.

公开(公告)号：AT83785T

公开(公告)日：1993-01-15

申请号：AT87112314

申请日：1987-08-25

Applicant: BASF AG

Inventor： WEBER ENGELBERT ,  DIEM HANS DR ,  MUEHLTHALER WOLFGANG ,  MATTHIAS GUENTHER DR

IPC: C08G12/12 ,  C08G12/32 ,  C08G14/06 ,  C09J161/34

公开(公告)号：DK106289A

公开(公告)日：1989-09-08

申请号：DK106289

申请日：1989-03-06

Applicant: BASF AG

Inventor： SCHMIDT-HELLERAU CHRISTOF ,  WEBER ENGELBERT ,  MATTHIAS GUENTHER

IPC: C08G14/06 ,  C08L61/34 ,  C09J161/34 ,  B27D1/00 ,  C09D3/50 ,  C09J3/16

公开(公告)号：DK155189C

公开(公告)日：1989-07-10

申请号：DK537581

申请日：1981-12-04

Applicant: BASF AG

Inventor： DUDECK CHRISTIAN ,  WEBER ENGELBERT ,  DIEM HANS ,  MAYER JOHANN ,  WITTMANN OTTO ,  LEHMANN GERHARD J

IPC: C08G12/12 ,  C08G12/42 ,  C09J161/24 ,  C09J161/32 ,  C09J3/16

公开(公告)号：DK106289D0

公开(公告)日：1989-03-06

申请号：DK106289

申请日：1989-03-06

Applicant: BASF AG

Inventor： SCHMIDT-HELLERAU CHRISTOF ,  WEBER ENGELBERT ,  MATTHIAS GUENTHER

IPC: C08G14/06 ,  C08L61/34 ,  C09J161/34 ,  B27D1/00 ,  C09D3/50 ,  C09J3/16

公开(公告)号：DE3629601A1

公开(公告)日：1988-03-03

申请号：DE3629601

申请日：1986-08-30

Applicant: BASF AG

Inventor： WEBER ENGELBERT ,  DIEM HANS DR ,  MUEHLTHALER WOLFGANG ,  MATTHIAS GUENTHER DR

IPC: C08G12/12 ,  C08G12/32 ,  C08G14/06 ,  C09J161/34 ,  C08G12/36 ,  C08G12/38 ,  C08G14/08 ,  C09J3/16