公开(公告)号：DE2205196A1

公开(公告)日：1973-08-09

申请号：DE2205196

申请日：1972-02-04

Applicant: BASF AG

Inventor： MATTHIAS GUENTHER DR ,  DIEM HANS DR ,  BRUNNMUELLER FRIEDRICH DR ,  GRABOWSKY OTTO DR

IPC: C07C47/052 ,  B01J23/00 ,  C07C45/00 ,  C07C45/38 ,  C07C67/00 ,  C08G12/00 ,  C07C47/04

公开(公告)号：DE2454769A1

公开(公告)日：1976-05-26

申请号：DE2454769

申请日：1974-11-19

Applicant: BASF AG

Inventor： GRABOWSKY OTTO DR ,  MAYER JOHANN DIPL CHEM DR

IPC: C08G12/12

公开(公告)号：DE2354928A1

公开(公告)日：1975-05-15

申请号：DE2354928

申请日：1973-11-02

Applicant: BASF AG

Inventor： SCHMIDT-HELLERAU CHRISTOF ,  GRABOWSKY OTTO DR

IPC: C08L97/02 ,  C09J161/00 ,  C09J3/16

公开(公告)号：DE2355212B1

公开(公告)日：1975-03-06

申请号：DE2355212

申请日：1973-11-05

Applicant: BASF AG

Inventor： GRABOWSKY OTTO DR ,  MATTHIAS GUENTHER DR ,  MAYER JOHANNES DR ,  SCHOENAICH GUENTHER DR

IPC: C07C275/06 ,  C07C67/00 ,  C07C239/00 ,  C07C273/18 ,  C07C127/15

Abstract: The preparation of isobutylidenediurea from isobutyraldehyde and urea, the particle size of the product being controlled by alternate use of sulfuric acid and phosphoric acid.

公开(公告)号：DE2243857A1

公开(公告)日：1974-04-04

申请号：DE2243857

申请日：1972-09-07

Applicant: BASF AG

Inventor： ERHARDT KLAUS DR ,  PETERSEN HARRO DR ,  TEUTHER WOLFGANG DR ,  WITTMANN OTTO ,  BRUNNMUELLER FRITZ DR ,  GRABOWSKY OTTO DR ,  MAYER JOHANN DR ,  LENZ JOHANN

IPC: C08G12/12 ,  C08G9/10

Abstract: A urea-formaldehyde resin is formed by (a) reacting formaldehyde and urea of an initial molar ratio of >=3, in an aqs. soln., pH 3, until 1% of the urea has reacted to form urone gps., or by reacting as above during a time t = 10pH-2 (between 90-100 degrees C), (b) adding urea to the obtd. prod., at pH=3, such that the polar ratio HCHO:urea is 2-2.75 and condensing until the aqs. soln. of the condensate is no longer indefinitely dilutable in water at room temp., and (c) concentrating or evaporating the soln. formed to give a prod. contg. HCHO and urea in a molar ratio 1-2.75. The resin is used partic. in the mfr. of plywood and has a reduced tendency to evolve free HCHO.

公开(公告)号：DE2110939A1

公开(公告)日：1972-09-14

申请号：DE2110939

申请日：1971-03-08

Applicant: BASF AG

Inventor： BRUNNMUELLER FRITZ DR ,  GRABOWSKY OTTO DR ,  LENZ JOHANN

IPC: C08J9/00 ,  C08G37/24

Abstract: Aminoplast foams which are rendered non-flammable by addn. of a water-insol. salt are prepd. by mixing an acid-curable aminoplast precondensate soln. contg. a base for forming the water-insol. salt or a corresponding water-soluble salt with a foamed soln. of a foaming agent contg. an acid for forming the water-insoluble salt, or an acid salt, in stoichiometric amount or excess w.r.t. the base or the water-soluble salt. This is followed by curing the foam. Since the flame-retardant is finely and evenly dispersed throughout the foamed mass only lower percentages (2-5 wt.%) are required to obtain effective non-flammability.