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EMULSON AG/TP1

THE AQUEOUS
CONCENTRATE OF ANIONIC
ACRYLIC COMPOUND

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

Structure of AMPS

 AMPS: Acrylamido-
methyl-propane
sulfonate

H
N
SO3H

O

Structure of Alkylmethacrylate

 Alkyl
2-methyl-propenoic
ester
O
R

O

Random Distribution of Three Linkages
 Monomer A - Monomer A
 Monomer A - Monomer B
 Monomer B - Monomer B

Structures
O O
 What’s the right
Me OR Me OR
structure??

NHR NHR

O O

 A polymer with idrophobic
and idrophilic groups

Specification (properties in
certificate of analysis)

 Milky dispersion

 pH (indiluted form):
5
 Low viscous liquid:
<1000 mPa.s at 20 °C
using Brookfield

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

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

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

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

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

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

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

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

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Emulson AG/TP1: Acrylic Polymer Dispersant from Lamberti

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