Instant release Coating with Kollicoat IR white

InstantreleaseCoatingwithKollicoatIR,
white
1.1.StandardFormulation
CompositionProportionsprayProportionbased
Solution [%]ondryfilm[%]
Polymer
KollicoatIR.......................13.0.............................65.0
Pigments
TalcorKaolin.........................4.0.............................20.0
TitaniumDioxide....................3.0.............................15.0
Solidconcentration..............20.0...........................100.0
1.2.HighEfficiencyFormulation
CompositionProportionsprayProportionbased
Solution [%]ondryfilm[%]
Polymer
KollicoatIR.......................19.2.............................64.0
Pigments
Talc.......................................7.2.............................24.0
TitaniumDioxide....................3.6.............................12.0
Solidconcentration..............30.0...........................100.0
Thecoatingcanbeperformedusingthespraysuspensionatroomtemperature.
However,heatingofthespraysuspensionto 70Clowersviscosity
andimprovessmoothnessofthefilm.
1.3. Formulation for Improved Appearance
Composition Proportion spray Proportion based
Solution [%] on dry film [%]
Polymer
Kollicoat IR .......................11.5 .............................64.0
Sodium Dodecyl Sulfate .........0.5 ...............................3.0
Pigments
Kaolin ...................................3.8 .............................21.0
Titanium Dioxide ....................2.2 .............................12.0
Solid concentration ..............18.0 ...........................100.0
Additional Gloss Coating: 5 wt% Polyethylene Glycol 6000 dissolved in
water, weight gain 0.3 – 0.6 mg/cm3.
2. Preparation of Spray Suspension
Method I:
All components （Kollicoat IR Pigments） are stirred to gether into the
specified amount of water. The resulting suspension is homogenized using
an Ultra-Turrax. The spray suspension must be stirred during the spraying
process to avoid sedimentation of the pigments.
Method II:
Polymer Solution :
Kollicoat IR is dissolved in the specified amount of water.
Pigment Suspension:
Pigments （iron oxide, color lake, titanium dioxide, talc or kaolin）, are intensively
stirred into the specified amount of water and homogenized in a
corundum disk mill or using an Ultra-Turrax.
Spray Suspension:
Incorporate the pigment suspension into the polymer Solution with stirring.
The suspension must be stirred during the spraying process to prevent
settling.
3. Coating procedure （Accela Cota 24’’）
Batch size ........................................................5 kg
Pan speed ....................................................14 rpm
Inlet air temperature ........................................60 C
Outlet air temperature ..............................40 – 45 C
Drying air volume .............................300 – 350 m3/h
Spray equipment ................................Schlick 931/7
Nozzle diameter ...........................................1.0 mm
Ato mizing air pressure .................................2 – 4 bar
Pattern air pressure ................................1 –1,75 bar
Distance Bed-Nozzle ......................................20 cm
Spraying rate ......................................20 – 30 g/min
Processing time ................................approx. 45 min