US 7,064,156 B2Granted

Continuous method for the production of powder paint suspensions (powder slurries) and powder paints

AssigneeBASF Coatings GmbH

InventorsHeinz-Peter Rink, Werner-Alfons Jung, Michael Stang, Heik Wolf

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Abstract

Powder coating materials prepared by (1) mixing at least two liquid components comprising in each case at least one liquid starting product in a static mixer, to give a molecularly disperse and/or finely dispersed liquid mixture, (2) emulsifying the liquid mixture (1) in an aqueous medium in a dispersing unit, to give an aqueous emulsion of liquid particals, (3) cooling the emulsion (2) so that a suspension of dimensionally stable particles is formed, (4) isolating the dimensionally stable particles from the suspension (3) or alternatively (3) isolating the dimensionally stable particles directly from the emulsion (2); and also processes for preparing them and their use as coating materials, adhesives, and sealing compounds or to prepare such compositions.

Claims26

Dependent claims

A continuous process for preparing a powder coating slurry or a powder coating material by emulsification of their constituents comprising

(1) preparing at least one liquid component (A) comprising at least one binder in a reaction vessel by a method selected from the group consisting of continuous addition polymerization, polycondensation and combinations thereof,
(2) discharging the liquid component (A) continuously from the reaction vessel and conveying it into a mixing unit in which it is mixed continuously with at least one liquid component (B) comprising at least one additional starting material of the powder slurry or powder coating material, to give a liquid component (C), and
(3) conveying the liquid component (C) continuously into a dispersing unit in which it is emulsified in a continuously supplied aqueous medium (C), to give an aqueous emulsion (E) of liquid particles,
and subsequently either preparing a powder slurry (F) by
(4) cooling the emulsion (E), to form a suspension (F) of dimensionally stable particles, and
or preparing a powder coating material (G) by
(5) isolating the dimensionally stable particles directly from the aqueous emulsion (E) or the suspension (F).

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 10/474,859Filed 24 May 2002
Priority: DE 101-26-6491 Jun 2001
Published: US 2004/0082708 A129 Apr 2004
Granted: 20 Jun 2006
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

C08J 3/16
Powdering or granulating: by coagulating dispersions
B82Y 30/00
Nanotechnology for materials or surface science
C09D 5/02
Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced ; Filling pastes:…
C09D 5/03
Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced ; Filling pastes: powdery…