wetting agents for improved compatibility in · 2016. 12. 3. · wetting agents are added to...
TRANSCRIPT
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WATERBORNE COATINGs
Wetting agents for improved compatibility in
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How to select the right wetting agent for a tinted coating system?
Performanceimprovedbythewettingagent
•Increasedtintingstrength
•Reducedrub-outeffects
•Improvedsubstratewettingonmetaland/orpolyethylene
•Reducedwaterabsorption
Possibleinfluencesbythewettingagent
•Impactonstoragestability
•Impactongloss
•Impactonscrubresistance
•Impactonfoaming
Our product recommendation Wettingagentsforacryliclacquers Wettingagentsforemulsionpaints
Producttechnical,safetyandregulatoryinformation
Contents
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Wettingagentsareaddedtowaterbornecoatingstoincreasethewettingofthesubstrate,toimprovethecompatibilitywithpigmentsandothercompo-nents,aswellas,toreducerub-outeffects.Atthesametimewettingagentsmighthaveaninfluenceonthecoating’sstoragestability,gloss,scrubresist-anceandfoamingbehavior.
Tintedpaintsarehighlycomplexsystems.Itcanbeatechnicalchallengeforthepaintformulatortoselecttherightwettingagenttodevelopastable,highperformingcoatingformulation,especiallywhenconsideringthattheproduct’ssustainabilityaspects,suchaslowVOC/SVOCorecolabelsuitability,needtobetakenintoaccount.
Theindustrycanchoosefromavarietyofwettingagentchemistries.Asakeysuppliertopaintformulators,Clariantunderstandsthatitisimportanttoapaintformulatortoidentifyinashorttimethemostappropriateproductwhichsolvesformulationproblemswithrespecttoincompatibility.Clarianthasthereforeevaluateditsrangeofwettingagentsforacryliclacquersandemul-sionpaintsaccordingtothefollowingsetofparameters.Ourobjectiveistodeliverourcustomersthebestapplicationsolutionforalong-lastingandsustainablebusiness.
How to select the right wetting agent for a tinted coating system?
INfluENCE ON ThE COATING fORmulATION
PERfORmANCE PARAmETER ACRylIC lACquERs
EmulsION PAINTs
Tinting strength ✓ ✓
Rub-out ✓ ✓
Substrate wetting on metal and polyethylene ✓
Water absorption ✓
Possible influences of wetting agent Storage stability ✓ ✓
Impact on gloss ✓ ✓
Scrub resistance ✓
Foaming behavior ✓ ✓
Performance boosted by wetting agents
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Performance improved by the wetting agent
COATING WIThOuT WETTING AGENT COATING WITh WETTING AGENT
Defined as standard
Tinting strength defined as 100%
Comparison against defined standard
To achieve the full tinting strength potential of tinted coatings, the fillers and pigments must be well dispersed during formulation. A re-agglomeration of the particles should be avoided throughout the coating production, storage, application and drying.
A low tinting strength in a coating can be caused by inefficient pigment-dispersion or re-agglomera-tion, as well as, pigment flocculation, which is also known as rub-out.
INCREAsEd TINTING sTRENGTh
Tinting strength increased by up to 10%
good performance •
Tinting strength increased by more than 10%
excellent performance ••
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A rub-out test is performed by rubbing the coating film with a finger while it is still moist but already starting to dry.
In doing so the agglomerated pigments are being separated, which leads to an increased tinting strength at the rubbed spot. The bigger the difference in color intensity between the rubbed spot and the unrubbed area, the bigger the rub-out problem.
REduCEd RuB-OuT EffECTs
COATING WIThOuT WETTING AGENT COATING WITh WETTING AGENT
Defined as standard
Strong rub-out effects
Comparison against defined standard
Slight rub-out effects
good performance •
No rub-out
excellent performance ••
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COATING WIThOuT WETTING AGENT COATING WITh WETTING AGENT
Defined as standard
No adhesion of coating on metal substrate
Comparison against defined standard
COATING WIThOuT WETTING AGENT COATING WITh WETTING AGENT
Defined as standard
No adhesion of coating on polyethylene substrate
Comparison against defined standard
Substrate wetting enables uniform coating application. Good wetting is a prerequisite for optimal adhesion. Defects in the coating surface such as craters need to be minimized.
substrate wetting on metal
ImPROvEd suBsTRATE WETTING ON mETAl ANd/OR POlyEThylENE
Good adhesion of coating on metal substrate
Good adhesion of coating on polyethylene substrate
Excellent adhesion of coating on metal substrate
Excellent adhesion of coating on polyethylene substrate
good performance • excellent performance ••
good performance • excellent performance ••
substrate wetting on polyethylene
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Surfactants have an influence on the film-forming properties of the coating formulation, which can lead to an increased resistance against water absorption.
REduCEd WATER ABsORPTION
COATING WIThOuT WETTING AGENT COATING WITh WETTING AGENT
Defined as standard
High absorption of water into the coating film
Comparison against defined standard
Moderate absorption of water into the coating film
No absorption of waterinto the coating film
good performance • excellent performance ••
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Possible influences by the wetting agent
COATING WIThOuT WETTING AGENT COATING WITh WETTING AGENT
Defined as standard
Stable viscosity, no sedimentation or syneresis
Comparison against defined standard
The use of wetting agent can have a negative influence on the paint stability. Paint formulators there-fore try to select the additive with the lowest impact. To evaluate the paint stability a coating is stored at room temperature and at 50°C in the oven for 28 days. Paint stability refers to the interaction of the different ingredients at room temperature compared to the influence of heat storage through measure-ment of viscosity, sedimentation and syneresis.
Coatings are classified or categorized by different gloss levels. There are high gloss, semi-gloss and matte paints available on the market. For a paint formulator it is impor-tant that the addition of a wetting agent to the formulation has little or no influence on the final gloss property. The difference of specular reflection of a coating surface can be measured with a gloss meter.
ImPACT ON sTORAGE sTABIlITy
ImPACT ON GlOss
Moderate influence on viscosity, sedimentation and syneresis
No or marginal influence on viscosity, sedimentation and syneresis
moderate impact • no impact ••
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The use of a wetting agent can have a negative impact on the scrub resistance. Paint formulators, therefore, try to select the additive with the lowest influence.
Standard procedures for determining the resistance of wall paints against abrasion by scrubbing are, for example, ASTM D 4213 or DIN EN ISO 11998. These standards describe the various testing meth-ods for components and formulation systems used in waterborne interior wall and ceiling coatings.
Foam formation is caused by the entry of gas into the liquid formulation. This can happen during the production process when the coat-ing is stirred or mixed. One possible source of foam is surfactants in the formulation. The foam behavior can be measured by deter-mining the density of the liquid paint with a density meter. A higher density indicates less air is integrated in the paint formulation.
Impact on scrub resIstance
Impact on foamIng
coatIng wIthout wettIng agent coatIng wIth wettIng agent
Defined as standard
Scrub resistance defined as 100%
Comparison against defined standard:
Reducing film thickness moderately
No change of film thickness or only marginal influence
moderate impact • no impact ••
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Our product recommendation
Wetting agents for acrylic lacquers
Clariant’s wetting agents were evaluated against the described performance parameters in a glossy water-based acrylic lacquer that is VOC-free and resistant against blocking.
The wetting agent was used as post additive in the following formulation (position 12). It also possible to use the wetting agent during the pre-mixing process step.
POs PROCEss sTEP
PROduCT fuNCTION
PROduCT dEsCRIPTION PROduCT ACTIvE CONTENT
PROduCT By WEIGhT PERCENT
1 Solvent Water 15.00%
2 Pre-Mixing Binder Pure acrylate MFT 1 ° C; TG -10/50; particle size 0.10 µm
50% 15.00%
3 Dispersing agent Polyacrylate 45% 0.20%
4 Neutralization Ammonia 25% 0.30%
6 Defoamer Organic modified polysiloxane 25% 0.20%
6 Filler Titanium dioxide, rutile-type, coated with Al + Zr
100% 17.50%
7 Binder Pure acrylate MFT 1 ° C; TG -10/50; particle size 0.10 µm
50% 45.00%
8 Thickener Polyacrylate 30% 2.00%
9 Let-down Solvent Water 3.50%
10 Preservative Isothiazolinone MIT + BIT 2.5% 0.10%
11 Defoamer Organic modified polysiloxane 25% 0.20%
12 Post addition Wetting agent e.g. Genapol® ED 3060 100% 1.00%
Grinding
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PROduCT NAmE IONICITy
ACTIvE dOsAGE IN ACRylIC lACquER (PvC 20-50)
suPPly dOsAGE IN ACRylIC lACquER (PvC 20-50)
Dispersogen® MT 200 Nonionic 1.0% - 1.5% 1.0% - 1.5% ● ● ● ● ● ● ● ● ● ● ● ●
Dispersogen® PL 30 Nonionic 1.0% - 1.5% 1.0% - 1.5% ● ● ● ● ● ● ● ● ● ● ● ● ●
Dispersogen® AN 200 Anionic 1.2% - 1.5% 1.5% - 1.9% ● ● ● ● ● ● ● ● ● ● ● ●
Dispersogen® ECS Anionic 1.0% - 1.5% 3.3% - 5.0% ● ● ● ● ● ● ● ● ●
Dispersogen® LFS Anionic 1.0% - 1.5% 1.0% - 1.5% ● ● ● ● ● ● ● ● ● ● ● ●
Emulsogen® LCN 118 Nonionic 1.0% - 1.5% 1.3% - 1.9 % ● ● ● ● ● ● ● ● ● ●
Emulsogen® LCN 158 Nonionic 1.0% - 1.5% 1.3% - 1.9 % ● ● ● ● ● ● ● ● ● ● ●
Emulsogen® LCN 287 Nonionic 1.0% - 1.5% 1.4% - 2.1% ● ● ● ● ● ● ● ● ● ● ● ●
Emulsogen® TS 100 Nonionic 1.2% - 1.5% 1.2% - 1.5% ● ● ● ● ● ● ● ● ● ● ● ● ● ●
Emulsogen® TS 200 Nonionic 1.0% - 1.5% 1.0% - 1.5% ● ● ● ● ● ● ● ● ● ● ● ●
Genapol® ED 3060 Nonionic 1.0% - 1.5% 1.0% - 1.5% ● ● ● ● ● ● ● ● ● ● ● ● ●
Genapol® O 080 Nonionic 1.2% - 1.5% 1.2% - 1.5% ● ● ● ● ● ● ● ● ● ●
Genapol® O 100 Nonionic 1.0% - 1.5% 1.0% - 1.5% ● ● ● ● ● ● ● ● ● ● ●
PROduCT RECOmmENdATION
INC
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GLegend
● ● excellentperformance
● goodperformance● ● noimpact● moderateimpact
ImPACT ON fORmulATION
PERfORmANCE BENEfITs
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Wetting agents for emulsion paints
Clariant’s wetting agents were evaluated against the described performance parameters in a matte water-based emulsion paint for indoor and outdoor use, categorized under the scrub-resistance class 2 according to ISO 11988.
The wetting agent was used as post additive in the following formulation (position 18). It also possible to use the wetting agent during the pre-mixing process step.
POs PROCEss sTEP
PROduCT fuNCTION
PROduCT dEsCRIPTION PROduCT ACTIvE CONTENT
PROduCT By WEIGhT PERCENT
1 Solvent Water 22.00%
2 Thickener Cellulose 100% 0.30%
3 Pre-Mixing Neutralizing agent Caustic soda 10% 1.00%
4 Dispersing agent Polyacrylate 45% 0.40%
5 Defoamer Organic modified polysiloxane 25% 0.30%
6 Titanium dioxide, rutile-type, coated with Al + Zr
100% 10.00%
7 Talc d50 = 10µm 100% 8.00%
8 Kaolin clay d50 = 5µm 100% 3.00%
9 Grinding Filler Calcium carbonate PCC d50 = 1 µm 100% 5.00%
10 Calcium carbonate GCC d50 = 2µm 100% 8.00%
11 Calcium carbonate GCC d50= 5 µm 100% 10.00%
12 Calcium carbonate GCC d50= 10 µm 100% 5.00%
13 Binder Pure acrylate MFT 2 ° C; TG 13; particle size 0.10 - 0.5 µm
53% 22.00%
14 Preservative Isothiazolinone MIT + BIT 2.5% 0.20%
15 Let-down Defoamer Organic modified polysiloxane 25% 0.30%
16 Thickener Acrylate 30% 2.50%
17 Solvent Water 1.25%
18 Post addition Wetting agent e.g. Emulsogen® TS 100 100% 0.75%
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PROduCT NAmE IONICITy
ACTIvE dOsAGE IN EmulsION PAINTs (PvC 40-80)
suPPly dOsAGE IN EmulsION PAINTs (PvC 40-80)
Dispersogen® AN 200 Anionic 0.5% - 1.5% 0.6% - 1.9 % ● ● ● ● ● ● ●
Dispersogen® ECS Anionic 0.5% - 1.0% 1.7% - 3.3 % ● ● ● ● ● ●
Dispersogen® MT 200 Nonionic 1.0% - 1.5% 1.0% - 1.5% ● ● ● ● ● ● ● ● ●
Dispersogen® PL 30 Nonionic 0.5% - 1.0% 0.5% - 1.0% ● ● ● ● ● ● ● ● ● ●
Dispersogen® LFS Anionic 1.0% - 1.5% 1.0% - 1.5% ● ● ● ● ● ● ● ● ●
Emulsogen® TS 200 Nonionic 1.0% - 1.5% 1.0% - 1.5% ● ● ● ● ● ● ● ●
Emulsogen® TS 100 Nonionic 0.5% - 1.0% 0.5% - 1.0% ● ● ● ● ● ● ● ● ● ●
Genapol® B Nonionic 1.0% - 1.5% 1.0% - 1.5% ● ● ● ● ● ● ● ●
Genapol® ED 3060 Nonionic 0.5% - 1.5% 0.5% - 1.5% ● ● ● ● ● ● ● ● ● ●
Genapol® O 080 Nonionic 0.5% - 1.0% 0.5% - 1.0% ● ● ● ● ● ● ● ●
Genapol® O 100 Nonionic 0.5% - 1.5% 0.5% - 1.5% ● ● ● ● ● ● ● ● ●
PROduCT RECOmmENdATION
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PERfORmANCE BENEfITs
ImPACT ON fORmulATION
Legend
● ● excellentperformance
● goodperformance● ● noimpact● moderateimpact
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Product technical, safety and regulatory information
Product name IonIcIty actIve content
aPPearance ecolabel suItabIlIty 1
aPeo-free 2 voc svoc Hazardlabel3
ecotaInlabel
Dispersogen® AN 200 Anionic 80% Brownish, clear liquid ✓ ✓ < 0.1% < 7.0 % label free
Dispersogen® ECS Anionic 30% Yellowish, clear liquid ✓ ✓ < 0.1% < 3.0 % label free
Dispersogen® MT 200 Nonionic 100% Brownish liquid ✓ ✓ < 0.1% < 1.0 % label free
Dispersogen® PL 30 Nonionic 100% Viscous, cloudy liquid ✓ ✓ < 1.0% < 2.0 % label free
Dispersogen® LFS Anionic 100% Brownish, viscous liquid ✓ ✓ < 3.0% < 4.0 % label-free
Emulsogen® LCN 118 Nonionic 80% Clear liquid ✓ ✓ < 1.0% < 2.0%
Emulsogen® LCN 158 Nonionic 80% Clear liquid ✓ ✓ < 1.0% < 1.0%
Emulsogen® LCN 287 Nonionic 70% Clear liquid ✓ ✓ < 1.0% < 1.0% label free
Emulsogen® TS 100 Nonionic 100% Yellow turbid liquid, high viscous
✓ ✓ < 0.1% < 3.0% label free
Emulsogen® TS 200 Nonionic 100% Yellowish paste ✓ ✓ < 0.1% < 3.0 % label free
Genapol® B Nonionic 100% Brownish, viscous liquid
✓ ✓ < 1.0% < 0.8% label free
Genapol® ED 3060 Nonionic 100% Yellowish liquid ✓ ✓ < 1.0% < 1.0% label free
Genapol® O 080 Nonionic 100% Clear, viscous liquid ✓ ✓ < 0.2% < 3.0%
Genapol® O 100 Nonionic 100% White paste ✓ ✓ < 0.1% < 1.2%
tecHnIcal data envIronmental & safety ProPertIes
Legend1 ProductissuitableforpaintsandcolorantsthatcomplywiththecriteriaoftheEuropeanEcoflower(2008/4453/EC;2008/4452/EC),theGerman BlueAngel(RALUZ102:2010andUZ12a11:2015),theScandinavianNordicSwan(2.32008)andtheFrenchNFEnvironment(NF130:2012).2Freeofalkylphenolethoxylates3Hazardlabel(GHS/CLP)isaccordingtotheGloballyHarmonizedSystem(GHS)ofclassification,labelingandpackagingofchemicalsubstances andmixtures.4EcoTain®isClariant‘slabelforsustainabilityexcellenceproductsandsolutions.Itsetsanambitiousbenchmarkanddistinguishesitselfbyexceeding marketstandardswhileconsideringtheoverallbenefitsandimpactsacrosstheentirelifecycle.EachproductlabeledasEcoTain®goesthrougha systematic,in-depthscreeningprocessusing36criteriainallthreesustainabilitydimensions,i.e.social,environmentalandeconomic.
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Regulatorystatusasof01.01.2016
PROduCT NAmE REACh (status
Clariant Eu)
AICs
(Australia)
dsl
(Canada)
ENCs
(Japan)
IECsC
(China)
KECI
(Korea)
NECI
(Taiwan)
NzIOC(New
zealand)
PICCs
(Philippines)
TsCA
(usA)
Dispersogen® AN 200 + - - - - - - - - -
Dispersogen® ECS + + + + + + + + + -
Dispersogen® MT 200 + + - + + + - + - +
Dispersogen® PL 30 + - - - - - - + - +
Dispersogen® LFS + + + + + + + + + +
Emulsogen® TS 100 + + + + + + + + - +
Emulsogen® TS 200 + + + + + + + + + +
Emulsogen® LCN 118 + + + + + + + - - +
Emulsogen® LCN 158 + + + + + + + - - +
Emulsogen® LCN 287 + + + + + + + - - +
Genapol® B + + + + + + + + + +
Genapol® ED 3060 + + + + + + + + + +
Genapol® O 080+
+ + + + + + + + +
Genapol® O 100 + + + + + + + + + +
REGulATORy INfORmATION
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This information corresponds to the present state of our knowledge and is intended as a general descrip-tion of our products and their possible applications. Clariant makes no warranties, express or implied, as to the information’s accuracy, adequacy, sufficiency or freedom from defect and assumes no liability in connection with any use of this information. Any user of this product is responsible for determining the suitability of Clariant’s products for its particular application. * Nothing included in this information waives any of Clariant’s General Terms and Conditions of Sale, which control unless it agrees otherwise in writing. Any existing intellectual/industrial property rights must be observed. Due to possible changes in our products and applicable national and international regulations and laws, the status of our products could change. Material Safety Data Sheets providing safety precautions, that should be observed when handling or storing Clariant products, are available upon request and are provided in compliance with applicable law. You should obtain and review the applicable Material Safety Data Sheet information before handling any of these products. For additional information, please contact Clariant.® Trademark of Clariant registered in numerous countries.
* For sales to customers located within the United States and Canada the following applies in addition: NO EXPRESS OR IMPLIED WARRANTY IS MADE OF THE MERCHANTABILITY, SUITABILITY, FITNESS FOR A PARTICULAR PURPOSE OR OTHERWISE OF ANY PRODUCT OR SERVICE.
© 2016 Clariant International AG, Rothausstrasse 61, 4132 Muttenz, Schweiz ® Product and service marks protected by Clariant
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BUINdUSTRIAL&CoNSUmERSPECIALTIES
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