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1. (WO1991005813) PROCESS FOR THE PRODUCTION OF A WHITE FINE-GRAINED MATERIAL OF UREA-FORMALDEHYDE RESIN OR A MODIFIED UREA-FORMALDEHYDE RESIN
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1991/005813 International Application No.: PCT/SE1990/000650
Publication Date: 02.05.1991 International Filing Date: 10.10.1990
Chapter 2 Demand Filed: 23.04.1991
IPC:
C08G 12/12 (2006.01) ,C08G 12/38 (2006.01)
C CHEMISTRY; METALLURGY
08
ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
G
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
12
Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
02
of aldehydes
04
with acyclic or carbocyclic compounds
10
with acyclic compounds having the moiety XC(-N)2 in which X is O, S, or -N
12
Ureas; Thioureas
C CHEMISTRY; METALLURGY
08
ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
G
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
12
Condensation polymers of aldehydes or ketones with only compounds containing hydrogen attached to nitrogen
02
of aldehydes
26
with heterocyclic compounds
34
and acyclic or carbocyclic compounds
36
Ureas; Thioureas
38
and melamines
Applicants:
PERSTORP AB [SE/SE]; S-284 80 Perstorp, SE (AllExceptUS)
OHLSSON, Stig [SE/SE]; SE (UsOnly)
Inventors:
OHLSSON, Stig; SE
Agent:
STENBERG, Yngve; Perstorp AB S-284 80 Perstorp, SE
Priority Data:
8903470-620.10.1989SE
Title (EN) PROCESS FOR THE PRODUCTION OF A WHITE FINE-GRAINED MATERIAL OF UREA-FORMALDEHYDE RESIN OR A MODIFIED UREA-FORMALDEHYDE RESIN
(FR) PROCEDE DE PRODUCTION D'UNE MATIERE BLANCHE A GRAIN FIN D'UNE RESINE D'UREE-FORMALDEHYDE OU D'UNE RESINE UREE-FORMALDEHYDE MODIFIEE
Abstract:
(EN) Process for the production of a white fine-grained material of urea-formaldehyde resin or a modified urea-formaldehyde resin. The process comprises reacting urea with formaldehyde at a molar ration of urea:formaldehyde between 1:0.4 and 1:2.5 at a temperature between 15 and 100 °C and at a pH between about 0.5 and 3.0, preferably between 0.8 and 2.0. Precipitated particles of urea resin being insoluble in the reaction mixture are then formed as a slurry.
(FR) Ledit procédé comprend la réaction de l'urée avec du formaldéhyde dans un rapport molaire urée/formaldéhyde compris entre 1 : 0.4 et 1: 2.5 à une température entre 15 et 100 °C et à un pH entre environ 0.5 et 3.0, de préférence entre 0.8 et 2.0. Des particules précipitées de résine d'urée qui sont insolubles dans le mélange de réaction sont ensuite réalisées sous forme de boue.
Designated States: AT, AU, BB, BG, BR, CA, CH, DE, DK, ES, FI, GB, HU, JP, KP, KR, LK, LU, MC, MG, MW, NL, NO, RO, SD, SE, SU, US
European Patent Office (AT, BE, CH, DE, DK, ES, FR, GB, GR, IT, LU, NL, SE)
African Intellectual Property Organization (BF, BJ, CF, CG, CM, GA, ML, MR, SN, TD, TG)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
AU1990066197