公开(公告)号：US20150045500A1

公开(公告)日：2015-02-12

申请号：US14451948

申请日：2014-08-05

Applicant: BASF SE

Inventor： Michael FINKENAUER ,  Evelyn Fuchs ,  Ralph Lunkwitz ,  Oliver Reese ,  Konrad Roschmann ,  Michael Schmidt ,  Martin Reif ,  Stephan Weinkötz

IPC: C08G12/12 ,  C08J5/00 ,  C09J161/24

CPC classification number: C08G12/12 ,  C08G12/00 ,  C08J5/005 ,  C08J2361/24 ,  C09J161/24

Abstract: The present invention relates to processes for discontinuously or continuously preparing aminoplast solutions by condensation of aminoplast formers with formaldehyde in a serial cascade of at least three stirred tank apparatus A, B, and C, which involves a) in apparatus A, reacting a mixture comprising formaldehyde and urea in a molar ratio of 2.3:1 to 2.9:1 and water at a pH of 6 to 8, set by means of a base, at a temperature of 80 to 85° C., where apparatus A consists of one or more, i.e., one to ten, preferably one to five, more preferably one to three, more particularly one or two stirred tanks in parallel or in series, very preferably of one stirred tank, b) in apparatus B, reacting said mixture at a molar ratio of formaldehyde to urea of 1.9:1 to 2.6:1, where apparatus B consists of one or more stirred tanks, wherein the molar ratio of formaldehyde to urea is lowered, optionally by further addition of urea, in stages to not less than 1.9:1, at a pH of 3.5 to 5.5, which is kept virtually constant, at a temperature of 100 to 105° C., and with a mean residence time of 10 to 90 minutes in the entire apparatus B, c) in apparatus C, at a temperature of 90 to 100° C., raising the pH to at least 5.9 and lowering the molar ratio of formaldehyde to urea to 1.7:1 to 1.4:1, where apparatus C consists of one or more stirred tanks, and d) by adding urea, at temperatures of 15 to 100° C., setting a final molar ratio of formaldehyde to urea of 0.7:1 to 1.28:1 and a pH of at least 7.

Abstract translation: 本发明涉及通过在至少三个搅拌罐装置A，B和C的串联级联中将氨基塑料形成物与甲醛缩合而不连续或连续制备氨基塑料溶液的方法，其涉及a）在装置A中，使包含 甲醛和尿素的摩尔比为2.3:1至2.9:1，pH为6至8的水通过碱在80至85℃的温度下设定，其中装置A由一个或多个 更优选地，即一至十个，优选一至五个，更优选一至三个，更特别地一个或两个平行或串联的搅拌槽，非常优选一个搅拌槽，b）在设备B中，使所述混合物在 甲醛与尿素的摩尔比为1.9:1至2.6:1，其中装置B由一个或多个搅拌槽组成，其中甲醛与尿素的摩尔比降低，任选地通过进一步加入尿素分级至不小于 1.9：1，pH 3.5〜5.5，保持v 在100至105℃的温度下，在装置C中的整个装置B，c）中的平均停留时间为10至90分钟，温度为90至100℃，升温 pH至至少5.9，并将甲醛与尿素的摩尔比降低至1.7：1至1.4：1，其中装置C由一个或多个搅拌槽组成，d）在15至100℃的温度下加入尿素。 ，将甲醛与尿素的最终摩尔比设定为0.7:1至1.28:1，pH至少为7。