EP 1663437 A1 20060607 - DEFOAMING AGENTS DEVOID OF EMULSIFIERS, METHOD FOR PRODUCING SAID AGENTS AND USE THEREOF
Title (en)
DEFOAMING AGENTS DEVOID OF EMULSIFIERS, METHOD FOR PRODUCING SAID AGENTS AND USE THEREOF
Title (de)
EMULGATORFREIE ENTSCHÄUMER, VERFAHREN ZU IHRER HERSTELLUNG UND IHRE VERWENDUNG
Title (fr)
AGENTS ANTIMOUSSANTS EXEMPTS D'EMULSIFIANTS, LEURS PROCEDES DE PRODUCTION, ET LEUR UTILISATION
Publication
Application
Priority
- EP 2004009569 W 20040827
- DE 10340540 A 20030901
Abstract (en)
[origin: CA2537295A1] The invention relates to defoaming agents that are devoid of emulsifiers, obtained by mixing: a) between 80 and 99 wt. % of at least one fine-particle d, practically water-insoluble inert solid with b) between 1 and 20 wt. % of at least one hydrophobic organic compound that is solid at room temperature and has a defoaming action in substance with such a shear gradient that the particle size of the defoaming compounds (b) is reduced to an average partic le size of between 0.5 and 15 m. The invention also relates to a method for producing oil-in-water dispersions that are devoid of emulsifiers from mixtures of (a) and (b). Said method involves the mixing of component (a) in a quantity of between 80 and 99 wt. % with component (b) in a quantity of between 1 and 20 wt % in the absence of emulsifiers in an extruder or kneadi ng machine, in such a way that the average particle size of component (b) in th e mixture is regulated to between 0.5 and 15 m, at temperatures of up to 100 ~ C and the subsequent emulsification of the mixture in water. The invention further relates to the use of the oil-in-water dispersions obtained by said method as defoaming agents and/or deaerators of aqueous, disperse or non- disperse liquids, in particular as defoaming agents and/or deaerators in the paper industry, in thefoodstuff industry and in purification plants.
IPC 1-7
IPC 8 full level
B01D 19/04 (2006.01); B01J 13/04 (2006.01)
CPC (source: EP US)
B01D 19/0404 (2013.01 - EP US); B01D 19/0422 (2013.01 - EP US)
Citation (search report)
See references of WO 2005023392A1
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
DE 10340540 A1 20050324; BR PI0413915 A 20061024; CA 2537295 A1 20050317; CN 1845777 A 20061011; EP 1663437 A1 20060607; US 2006276554 A1 20061207; WO 2005023392 A1 20050317
DOCDB simple family (application)
DE 10340540 A 20030901; BR PI0413915 A 20040827; CA 2537295 A 20040827; CN 200480025118 A 20040827; EP 04764543 A 20040827; EP 2004009569 W 20040827; US 57015406 A 20060301