Overcome Cellulosics Drawbacks with Rheotech™ x800.
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Transcript of Overcome Cellulosics Drawbacks with Rheotech™ x800.
Overcome Cellulosics Drawbacks with
Rheotech™ x800
2
Agenda
What is currently known about HEC and HASE thickeners :
strengths and weaknesses
Case studies addressing HEC and HASE known weaknesses
thanks to new HASE technologies
3
HEC thickeners use and performance
Stable viscosities for shelf life stability
Robustness vs binder technology
Color compatibility, homogeneous appearance to tinted paints
Open time to thin and thick paint coatings
Powder form, preparation time more water amount and swelling time
Poor leveling, addition of glycol or HEUR thickeners
Spatter issues and limited brush drag/film build due to poor high shear building
Limited choice of rheology profiles
Case 1
Case 3
4
HASE thickeners use and performance
A broad spectrum of rheology profiles, from Newtonian to pseudo plastic
Better productivity, liquid form, no preparation, incorporation at any stage, post-addition
Remarkable application properties thanks to the control of high shear rate viscosities
Better price/performance ratio: less use of thickener leading to cost savings
Dependant on binder technology
Significant viscosity evolution overnight and in time for 0-VOC paints
Open time reduction of thin and thick paint coatings
Case 2
Case 3
5
Semi-gloss Eggshell
MattGloss
Paints
3800
2800 4800
Balanced
PseudoplasticNewtonian
RHEOTECH™
A broad spectrum of rheology profiles, from Newtonian to Pseudo plastic Case 1
6
TARGET : 10 rpm Brookfield Viscosity
15 000 mPa.sViscosity ICI (P)
% dry dosage
/ total formulation0.2 0.4 0.6
1 P
2 P
One coatmatt paint
Standardmatt paint
Solvent free matt paint, based on 15% VAE binder type
A broad spectrum of rheology profiles, from Newtonian to Pseudo plastic
RHEOTE
CH™
HEC
3800Economical
matt paint
4800
2800
Case 1
7
NewtonianRheotech™ 2800
Balanced & robustRheotech™ 3800
Pseudo plasticRheotech™ 4800
one coat matt paint
semi gloss paint
economical matt paint
standard matt paint
excellentfair
poor goodleveling
film build
1- A broad spectrum of rheology profiles, from Newtonian to Pseudo plastic
Case 1
8
Dependency of HASE on binder technology
Aim: to maintain rheological balance while choosing another Aim: to maintain rheological balance while choosing another latex chemistry and/or changing its amount in a Matt Paint latex chemistry and/or changing its amount in a Matt Paint FormulationFormulation
Low Shear Viscosity 14 000 mPa.s (Brookfield at 10 rpm)
Medium Shear Viscosity 120 KUHigh Shear Viscosity 1.1 P (ICI viscosity)
Three different latexesThree different latexes Two dosagesTwo dosagesStyrene Acrylic 1 5 % & 15 % of latex Styrene Acrylic 2 5 % & 15 % of latex Ethylene Vinyl Acetate 15 % of latex
Results Results
● Difference between the obtained and targeted values is calculated in %.
● Target is considered as achieved each time the difference is less than plus or minus 30%.
Case 2
9
-30
0
30
60
%
Rheotech™3800 HASE 1 HASE 2
C/P (mPa.s)Stormer (KU)
Brookfield 10 rpm (mPa.s)
Dependency of HASE on binder technology
HASE 3 HASE 4 HASE 5
Matt dispersion paint: 15% of VAE binder, 0.3% of thickener (dry)
-30
0
30
60
%
Rheotech™3800 HASE 1 HASE 2
C/P (mPa.s)Stormer (KU)
Brookfield 10 rpm (mPa.s)
HASE 3 HASE 4 HASE 5
-30
0
30
60
%
Rheotech™3800 HASE 1 HASE 2
C/P (mPa.s)Stormer (KU)
Brookfield 10 rpm (mPa.s)
HASE 3 HASE 4 HASE 5
Case 2
10
Dependency of HASE on binder technology
Matt dispersion paint: 5% of styrene acrylic binder, 0.3% of thickener (dry)
-30
0
30
60
%
Rheotech™3800 HASE 1 HASE 2
C/P (mPa.s)Stormer (KU)
Brookfield 10 rpm (mPa.s)
HASE 3 HASE 4 HASE 5
Case 2
11
Dependency of HASE on binder technology
Matt dispersion paint: compliance between tested thickeners
0
1
2
3
4
5compliance/5
Rheotech™3800 HASE 1 HASE 2 HASE 3 HASE 4 HASE 5
The HASE technology deployed across Rheotech™ range allows:
• less binder dependency like HEC thickeners
• associative character more robust vs current HASE
• more flexibility for production processes
Case 2
12
Medium Mw HEC Rheotech™ 2800 Experimental
HASE ThickenerWater 303.0 160.0 364.0
NaOH 25% 0.9 0.3 1.9Ecodis™ P 50 3.0 3.0 3.0
Biocide 2.0 2.0 2.0Anti-foamer 1.0 1.0 1.0
Medium Mw HEC 6.0 - -Rheotech™ 2800 (30% ) - 13.3 -
New experimental HASE (30% ) - - 13.3TiO2 40.0 40.0 40.0
CaCO3 5 microns 300.0 300.0 300.0CaCO3 2 microns 200.0 200.0 200.0
Adjustement to pH 9VAE binder 74.0 74.0 74.0
Water 70.1 204.4 -NaOH 25% - 2.0 0.8
Total (g) 1 000.0 1 000.0 1 000.0
Thickener rate (dry/ TFW) 0.6 0.4 0.4
T0 viscositiesBrookfield @10 rpm (mPa.s) 8800 4960 16500
Brookfield @100 rpm (mPa.s) 2750 1960 6800 Stormer (K.U) 102 95 124
ICI (P) 1.2 1.3 1.3T 24h viscosities
Brookfield @10 rpm (mPa.s) 10500 5960 17200Brookfield @100 rpm (mPa.s) 3100 2310 6220
Stormer (K.U) 105 99 125 ICI (P) 1.3 1.3 1.3
Low emission high PVC matt paint PVC: 84%, SC: 58.7%
Case 3
HASE performance ratio and application propertiesNew outlook for open time
13
Low emission high PVC matt paint PVC: 84%, SC: 58.7%
Storage stability at room temperature and at 50°C
Case 3
0
5 000
10 000
15 000
20 000
Medium MW HEC Rheotech™ 2800 New experimentalHASE
10 r
pm
Bro
okfie
ld v
isco
sitie
s
Immediates
Viscosities 24h
Viscosities T 1week - Oven 50 °c
Viscosities t 1month - Oven 50°c
HASE performance ratio and application propertiesNew outlook for open time
14
Low emission high PVC matt paint PVC: 84%, SC: 58.7%
Storage stability: Freeze-thaw stability
0
5000
10000
15000
20000
25000
Medium Mw HEC Rheotech™ 2800 Experimental HASEthickener
10 r
pm
Bro
okfield
vis
cosi
ties
(mPa.s
)
Before
After 1 cycle
After 2 cycles
After 3 cycles
Case 3
HASE performance ratio and application propertiesNew outlook for open time
15
Low emission high PVC matt paint PVC: 84%, SC: 58.7%
Application Properties: Sag evaluation (ASTM D4400)
Medium Mw HEC Medium Mw HEC Rheotech™ 2800Rheotech™ 2800
No sag until 24 milsNo sag until 24 milsNo sag until 16 milsNo sag until 16 mils
Experimental HASE thickener
Experimental HASE thickener
No sag until 24 milsNo sag until 24 mils
Case 3
HASE performance ratio and application propertiesNew outlook for open time
16
Low emission high PVC matt paint PVC: 84%, SC: 58.7%
Application Properties: leveling evaluation (ASTM : D4062)
Rheotech™ 2800Rheotech™ 2800 Medium Mw HEC Medium Mw HEC
Leveling = 5Leveling = 5Leveling = 4Leveling = 4
Experimental HASE thickener
Experimental HASE thickener
Leveling = 7Leveling = 7
Case 3
HASE performance ratio and application propertiesNew outlook for open time
17
Low emission high PVC matt paint PVC: 84%, SC: 58.7%
Open Time
20
25
30
35
40
Medium Mw HEC Rheotech™ 2800 ExperimentalHASE thickener
Ope
n tim
e (m
in)
Case 3
HASE performance ratio and application propertiesNew outlook for open time
The review of the valuable advantages of HEC thickeners shows that
Robustness / binderStorage stability Open time
are totally matched by Rheotech™ technology
Rheotech™ family offers as well the added value of HASE thickeners
EfficiencyVersatilityImproved coating properties