Emulson AG/TP1: Acrylic Polymer Dispersant from Lamberti
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Emulson AG/TP1: Acrylic Polymer Dispersant from Lamberti

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Dispersant to disperse solid particles or liquid ...

Dispersant to disperse solid particles or liquid
droplets in continuous phase.
 Multi ancor points leads to strong (irreversible) adsorption
 Building of steric barrier and behaviour of
polyelectrolyte (electrostatic repulsion)
 Reducing viscosity
 Compatibility agent
 Milling aids: easy grinding
Product can be used in aqueous dispersions (mainly aqueous suspension concentrate SC) or in preparation of slurry to be spray dried
 as dispersant or co-dispersant (in combination with other polymer and/or traditional surfactant)
 as milling aid
High tolerance to extreme conditions of ionic
strength and temperature.

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Transcript

  • 1. EMULSON AG/TP1 THE AQUEOUS CONCENTRATE OF ANIONIC ACRYLIC COMPOUND
  • 2. Chemical Description  Aqueous dispersion (colloidal solution) of anionic acrylic polymer  Copolymer of alkylmethacrylate and AMPS  Low molar content of hydrophobic monomer (alkylmethacrylate)  Random distribution of structure units  Similar to comb-like (grafted) polymer
  • 3. Structure of AMPS  AMPS: Acrylamido- methyl-propane sulfonate H N SO3H O
  • 4. Structure of Alkylmethacrylate  Alkyl 2-methyl-propenoic ester O R O
  • 5. Random Distribution of Three Linkages  Monomer A - Monomer A  Monomer A - Monomer B  Monomer B - Monomer B
  • 6. Structures O O  What’s the right Me OR Me OR structure?? NHR NHR O O  A polymer with idrophobic and idrophilic groups
  • 7. Specification (properties in certificate of analysis)  Milky dispersion  pH (indiluted form): 5  Low viscous liquid: <1000 mPa.s at 20 °C using Brookfield
  • 8. Functions to be recognised  Dispersant to dispers solid particles or liquid droplets in continuous phase  Multi ancor points leads to strong (irreversible) adsorption  Building of steric barrier and behaviour of polyelectrolyte (electrostatic repulsion)  Reducing viscosity  Compatibility agent  Milling aids: easy grinding
  • 9. Like Polyelectrolyte  Hydrophilic monomer (AMPS) consists of sulfonic group  High molar ratio of AMPS provides high charge density  Sulfonic groups are neutralised (sodium salt); full dissociation particularly in pH >7
  • 10. Dispersion – Colloidal Solution  Sulfonic groups (in AMPS monomers) improve solubility of copolymer in water,  Alkyl chains (in methacrylate monomers) improve the adsorption and accumulation at polar/apolar interface  Due to relatively high molecular weight of copolymer , solubility characteristics of monomers and molar ratio the aqueous colloidal solution is being produced
  • 11. Application  Product can be used in aqueous dispersions (mainly aqueous suspension concentrate SC) or in preparation of slurry to be spray dried  as dispersant or co-dispersant (in combination with other polymer and/or traditional surfactant)  as milling aid
  • 12. Application and Guides for SC  Usually 2-5 % Emulson AG/TP1 gives desired results (regarding suspension stability, rheological characteristics)  Good compatibility with other anionic coformulants (phosphates, sulfonates)  Good compatibility with non-ionic alkoxylates (ethoxylates, EO/PO adducts)  Good compatibility with xanthan gum
  • 13. SC Formulations of following Active Ingredients were examined obtaining suitable results Inorganic solid actives  Bordoeaux Mixture  Copper oxychloride  Sulfur Organic solid actives  Diuron  Fluometuron  Bendiocarb
  • 14. Advantages  High tolerance to extreme conditions of ionic strength and temperature  Ideal for solvent-free aqueous system including SUSPENSIONS (slurries)  Usualy no wetting agent required
  • 15. Theta Conditions  Using NaCl (4M), CaCl2 (1M)and Na2SO4 (2M) the salt tolerance is excellent: no flucculation, precipitation occur  Heating up to 70 °C no flucculation and noincrease in viscosity