BYK内部公司培训资料-消泡剂作用原理课件.ppt

1、DefoamerWesel, 2007, Max Mustermann6/9/2022, Page 2, DefoamerContent What is foam - foam stabilization Mode of action of defoamers Defoamer classes Defoamer test methods6/9/2022, Page 3, DefoamerCauses for Foam Bubbles Adsorbed air (pigments, extenders) Reaction bubbles (e.g., carbon dioxide in PU s

2、ystems) Incorporated air (production, application) Air from the substrate (wood, concrete, .)6/9/2022, Page 4, DefoamerFoam Prevention Optimization of production process Wetting of solid particles Minimize utilization of foam stabilizing components Adjusting application conditions6/9/2022, Page 5, D

3、efoamerBubbles Rise to SurfaceV = Velocity of riser = Bubble radius = Viscosity of liquidVr2_6/9/2022, Page 6, DefoamerBubbles Break at SurfacePure liquids do not foam !6/9/2022, Page 7, DefoamerNo Foam in Pure Water6/9/2022, Page 8, DefoamerFoam Stabilizationhydrophobicnon-polarhydrophilicpolarSurf

4、actant6/9/2022, Page 9, DefoamerFoam Stabilization by Surfactants6/9/2022, Page 10, DefoamerTypes of FoamWet foamDry foam6/9/2022, Page 11, DefoamerElectrostatic Repulsion+10 nm+6/9/2022, Page 12, DefoamerDefoamers: Mode of Action6/9/2022, Page 13, DefoamerSpreading of Defoamer Marking water surface

5、 with inert powder Adding one droplet of defoamer Rapid spreading6/9/2022, Page 14, DefoamerSpreading of Defoamer (Slow-motion)6/9/2022, Page 15, DefoamerDefoaming6/9/2022, Page 16, DefoamerDefinition: Entering and Spreading Coefficient Entering coefficientE = F + int - D Spreading coefficientS = F

6、- int - DDefoamer:E 0 and S 0F = Surface tension of fluidint = Interfacial tension fluid/defoamer D = Surface tension of defoamer6/9/2022, Page 17, DefoamerDefoaming6/9/2022, Page 18, DefoamerDefoamer Classes for Aqueous Systems Mineral oil defoamers Silicone defoamers Silicone-free polymeric defoam

7、ers6/9/2022, Page 19, DefoamerComposition of Mineral Oil Defoamers%Mineral oil85 - 95Hydrophobic particles1 - 3Emulsifier3 - 6Modified polysiloxanes0,5 - 36/9/2022, Page 20, DefoamerDefoaming Through Hydrophobic ParticlesHydrophobicparticleFoam lamellaDestabilization6/9/2022, Page 21, DefoamerMinera

8、l Oil Defoamers for Emulsion Paints and PlastersgoodInterior paintsPlastersIndustrialemulsionsGloss and semigloss paintsEmulsion productionEmulsiontypeContains siliconeBYK-033100%NoBYK-034100%YesAlkylphenol-ethoxylate-free defoamersBYK-031w/oNoBYK-035100%YesBYK-037w/oYesBYK-038100%Yesexcellent6/9/20

9、22, Page 22, DefoamerBYK-030 FamilyUsage of defoamers according to PVC of the systemPVC102030405060708090BYK-035BYK-031 / BYK-032 /BYK-037BYK-033BYK-034 / BYK-038 6/9/2022, Page 23, DefoamerPolydimethylsiloxanescompatibleincompatible2-3045-2301800-2900380-1500DefoamingFlowSlipHammertonex(CH3)3Si O S

10、i O Si(CH3)3CH3CH3x6/9/2022, Page 24, DefoamerSilicone Defoamersn(CH3)3 Si O Si O Si O Si(CH3)3 CH3CH3CH3(CH2)xPolyetherRmPolyether: EO, PO, EO/PO6/9/2022, Page 25, DefoamerSilicone Defoamers for Emulsion Paints and PlastersgoodInterior paints,PlastersIndustrialemulsionsGloss and semigloss paintsSea

11、lers, transparent systemsEmulsion productionBYK-045BYK-1610BYK-1615excellent6/9/2022, Page 26, DefoamerSilicone Defoamers for Aqueous SystemsSolids%Hydrophobic ParticlesCarrier/SolventBYK-017100-BYK-018100Polyglycol MW 1000, hydrophobicBYK-019 60DipropyleneglycolmonomethyletherBYK-021 100Polyglycol

12、MW 1000, hydrophobicBYK-022 100Polyglycol MW 1000, hydrophobicBYK-023 20WaterPolyether = PO6/9/2022, Page 27, DefoamerSilicone Defoamers for Aqueous SystemsSolids%Hydrophobic ParticlesCarrier/SolventBYK-02010Butylglycol / Ethylhexanol /White spiritsBYK-024100Polyglycol MW 2000, hydrophilicBYK-044 57

13、WaterBYK-093 100Polyglycol MW 2000, hydrophilicBYK-094 100Polyglycol MW 1000, hydrophilic/hydrophobic: emulsifiablePolyether = EO or EO/PO6/9/2022, Page 28, DefoamerSilicone Defoamers for Aqueous SystemsWood, parquet and plastic coatingsAutomotive basecoatsPigmentconcentratesHigh quality deco paints

14、 /Industrial coatingsPrinting inks, Overprint varnishesBYK-017BYK-018BYK-019BYK-021BYK-022BYK-023BYK-024BYK-025BYK-028BYK-044BYK-093BYK-0946/9/2022, Page 29, DefoamerSilicone Defoamer Selection - Aqueous Systems less hydfrophobic more compatibleIncreasing defoaming action strongly hydrophobic more i

15、ncompatibleBYK-025BYK-024/BYK-025combinationBYK-022/BYK-024 combinationBYK-019BYK-024BYK-021BYK-018BYK-022BYK-044BYK-094BYK-023BYK-017BYK-028BYK-093Starting point:6/9/2022, Page 30, DefoamerDefoamer SelectionShear forceBYK-021BYK-019BYK-018BYK-093BYK-028BYK-024BYK-025Duration of incorporationPost ad

16、ditionLet downGrindingBYK-044BYK-017BYK-022BYK-023BYK-0946/9/2022, Page 31, DefoamerSilicone-free and Mineral Oil Free Defoamers forAqueous Systems 2pack PUEmulsionpaints and plastersPVC 30-85 Alkyd emulsionsPolymeri-zation processesAqueous printing inks and OPVAcrylate/Melamine pigmentedDosageBYK-0

17、110,5 - 1,5%BYK-0120,05 - 0,5%BYK-0160,1 - 0,7%goodexcellent Foam destroying polymers and hydrophobic particles No influence on recoatability and colorant acceptance6/9/2022, Page 32, DefoamerDefoamers for Solvent-borne and Solvent-free Systems Silicone defoamers Silicone-free polymer defoamers Sili

18、cone/polymer defoamers Silicones and acrylates with defoaming properties6/9/2022, Page 33, DefoamerSilicone Defoamers for Solvent-borne and Solvent-free SystemsPolarityEfficiencylowhighBYK-020 BYK-071BYK-141BYK-080 A BYK-067 ABYK-066 NBYK-065lowhigh6/9/2022, Page 34, DefoamerSilicone-free Polymer De

19、foamers for Solvent-borne and Solvent-free SystemsPolarityEfficiencylowhighlowhighBYK-051BYK-052BYK-1752BYK-053BYK-055BYK-057BYK-A550BYK-A560BYK-054BYK-1790Silicone-free6/9/2022, Page 35, DefoamerSilicone/Polymer Defoamers for Solvent-borne and Solvent-free SystemsPolarityEfficiencylowhighlowhighBYK

20、-070BYK-088BYK-A 530BYK-060 N6/9/2022, Page 36, DefoamerSurface Additives with Defoaming Properties BYK-077 BYK-322 BYK-323 BYK-320 BYK-354 BYK-352 BYK-392 BYK-359SiliconesAcrylates6/9/2022, Page 37, DefoamerDefectsFoamDefoamer Selection for Solvent-borne Systemscompatible/solubleincompatible/insolu

21、bleDefoamingFoam stabilizationOptimum6/9/2022, Page 38, DefoamerInfluence of Compatibility:One Defoamer in Three Different SolventsLeft: too incompatible turbidMiddle: too compatible foam stabilizationRight: good balance clear, no foam6/9/2022, Page 39, DefoamerDefoamer Test Methods Shaking6/9/2022,

22、 Page 40, DefoamerDefoamer Test Methods - Shaking6/9/2022, Page 41, DefoamerDefoamer Test Methods Shaking Stirring-in of air by dissolver6/9/2022, Page 42, DefoamerDefoamer Test Methods - Stirring-in of Air by Dissolver6/9/2022, Page 43, DefoamerDefoamer Test Methods Shaking Stirring-in of air by di

23、ssolver Introducing air by pump6/9/2022, Page 44, DefoamerDefoamer Test Methods Shaking Stirring-in air by dissolver Introducing air by pump Rolling with porous foam roller6/9/2022, Page 45, DefoamerDefoamer Test Methods - Rolling With Foam Roller6/9/2022, Page 46, DefoamerDefoamer Test Methods Shak

24、ing Stirring-in air by dissolver Introducing air by pump Rolling with porous foam roller Brush application6/9/2022, Page 47, DefoamerDefoamer Test Methods - Brush Application6/9/2022, Page 48, DefoamerDefoamer Test Methods Shaking Stirring-in air by dissolver Introducing air by pump Rolling with por

25、ous foam roller Brush application Measurement of density6/9/2022, Page 49, DefoamerSummary Foam prevention1. Production2. Application Correct additive selection1. Wetting and dispersing additives2. Surface additives Usage of defoamers6/9/2022, Page 50, DefoamerANTI-TERRA, ATEPAS, BYK, BYK-DYNWET, BY

26、K-SILCLEAN, BYKANOL, BYKETOL, BYKOPLAST, BYKUMEN, DISPERBYK,DISPERPLAST, ISAROL, LACTIMON, NANOBYK, SILBYK and VISCOBYK are registered trademarks of BYK-Chemie.AQUACER, AQUAMAT, AQUATIX, CERACOL, CERAFAK, CERAFLOUR, CERAMAT, CERATIX and MINERPOL are registered trademarks of BYK-Cera.LICOMER is a reg

27、istered trademark of Clariant.This information is given to the best of our knowledge. Because of the multitude of formulations, production, and application conditions, all the above-mentioned statements have to be adjusted to the circumstances of the processor. No liabilities,including those for patent rights, can be derived from this fact for individual cases.