(19)
(11) EP 1 625 891 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
19.04.2006 Bulletin 2006/16

(43) Date of publication A2:
15.02.2006 Bulletin 2006/07

(21) Application number: 05076856.3

(22) Date of filing: 10.08.2005
(51) International Patent Classification (IPC): 
B05B 1/02(2006.01)
B05B 1/06(2006.01)
 B05B 1/04(2006.01)
B05D 1/02(2006.01)
(84) Designated Contracting States:
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
Designated Extension States:
AL BA HR MK YU

(30) Priority: 13.08.2004 EP 04380170

(71) Applicant: IMPERIAL CHEMICAL INDUSTRIES PLC
London W1U 3AN (GB)

(72) Inventors:
  • INSAUSTI-ECIOLAZA, Saturnino
    20400 Tolosa-Guipuzcoa (ES)
  • MOUZOURAS, Renos
    Ansford Hill, Sommerset BA7 7JL (GB)

(74) Representative: Cooper, Alan Victor 
ICI Group Intellectual Property, Wexham Road
Slough, Berkshire SL2 5DS
Slough, Berkshire SL2 5DS (GB)

   


(54) Airless spray-coating of a surface with a viscous aqueous architectural coating composition


(57) A process for the airless spray-coating of a surface with a viscous aqueous non-Newtonian architectural coating composition wherein the composition contains a preferably associative thickener and is subjected to a pressure of from 2.5 to 5 bar generated preferably by hand-operated compressor and then sprayed from a preferably slot-shaped outlet orifice (52) in a nozzle (50) to produce an outflow (31) of composition having boundaries (35) which diverge at least until it has formed a front of at least 30mm in width. The composition preferably has a Brookfield viscosity of at least 0.5 pa.sec and a solids content of 7 wt %.
Also apparatus for performing the process comprising a container containing the coating composition together with a nozzle having an outlet orifice, a hand-operated compressor and a pressure release valve actuatable in the pressure range 2.5 to 5 bar and preferably an auxiliary orifice upstream of the outlet orifice.
The process and apparatus enable the viscous compositions to be applied quickly using low pressures easily generated by a hand compressor.







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