EP 0037026 B1 19850731 - PROCESS FOR THE PREPARATION OF A STORAGE-STABLE, EASILY SOLUBLE GRANULATED COMPOUND CONTAINING A BLEACH ACTIVATOR
Title (en)
PROCESS FOR THE PREPARATION OF A STORAGE-STABLE, EASILY SOLUBLE GRANULATED COMPOUND CONTAINING A BLEACH ACTIVATOR
Publication
Application
Priority
DE 3011998 A 19800328
Abstract (en)
[origin: US4372868A] This invention relates to a process for preparing bleach activator granulates comprising from about 90 to 98 percent by weight of bleach activator and from about 10 to 2 percent by weight of granulating adjuvant, based on the weight of the anhydrous components, which comprises the steps of: (a) mixing powdered bleach activator which has a mean particle size of from about 0.01 to 0.8 mm with from about 50 to 100 percent by weight of the total granulating adjuvant to be used, which granulating adjuvant comprises a water-soluble cellulose ether, starch, or starch ether in the form of a free-flowing powder having a mean particle size of from about 0.01 to 0.8 mm; (b) moistening the mixture from step (a) with water or an aqueous solution containing the remainder of the granulating adjuvant in a solution of from about 0.1 to 10 percent by weight, based on the weight of the total solution; (c) granulating the moist mixture from step (b); and (d) drying the moist granulate from step (c) until the moisture content is less than 2 percent by weight, preferably less than 1 percent by weight. Additionally, during steps (a) or (b), a polysiloxane defoaming agent can be added.
IPC 1-7
IPC 8 full level
C11D 7/54 (2006.01); C11D 3/22 (2006.01); C11D 3/39 (2006.01); C11D 17/00 (2006.01)
CPC (source: EP US)
C11D 3/3935 (2013.01 - EP US); C11D 17/0039 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI NL SE
DOCDB simple family (publication)
EP 0037026 A1 19811007; EP 0037026 B1 19850731; AT E14594 T1 19850815; DE 3011998 A1 19811008; DE 3011998 C2 19820616; DE 3171538 D1 19850905; JP H0340080 B2 19910617; JP S56149500 A 19811119; US 4372868 A 19830208
DOCDB simple family (application)
EP 81102083 A 19810320; AT 81102083 T 19810320; DE 3011998 A 19800328; DE 3171538 T 19810320; JP 4326981 A 19810326; US 24609781 A 19810320