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Copolymer of Acrylic Acid-2-Acrylamido-2-Methylpropane Sulfonic Acid

AA/AMPS sulfonated copolymer is a Acrylic Acid/AMPS copolymer that inhibits the formation of calcium phosphate scale while dispersing iron, zinc, and phosphates.

EC / List no.: 609-852-3
CAS no.: 40623-75-4

AA/AMPS= Copolymer of Acrylic Acid-2-Acrylamido-2-Methylpropane Sulfonic Acid 

Acrylic acid/2-acrylamido-2-methyl-1-propanesulfonic acid copolymer

Regulatory process names: 2-Propenoic acid, polymer with 2-methyl-2-[(1-oxo-2-propen-1-yl)amino]-1-propanesulfonic acid

IUPAC names: Acrylic acid/2-acrylamido-2-methyl-1-propanesulfonic acid copolymer

Copolymer of acrylic acid

Other names: Acrylic acid,2-acrylamido 2-methylpropane sulphonic acid copolymer




AA/AMPS Copolymer is a high-performing scale inhibitor and dispersing agent with low free monomer levels 

Applications of AA/AMPS Copolymer: Calcium Phosphate inhibitor for Cooling water treatment, Boiler water treatment, Pulp and Paper.
AA:AMPS copolymer


AA/AMPS Copolymer is a new sulfonated copolymer designed to provide formulators in the water treatment industry with excellent calcium phosphate scale inhibition while dispersing iron, zinc and silt. 
Most importantly, with the unique proprietary manufacturing process of AA AMPS Copolymer, formulators can count on the lowest free-monomer-level scale inhibitor in the marketplace and increased performance over that of similar polymer compositions. 


AA/AMPS is a copolymer of acrylic acid and 2-acrylanmido-2-methylpropanesulfonic acid. 
Thanks to its carboxylic group (scale inhibition and dispersion) and sulfonic acid group (strong polarity) in this copolymer, AA/AMPS has high calcium tolerance and good scale inhibition for calcium phosphate, calcium carbonate and zinc scale. 

When built with organophosphines, the synergic effect is obvious.

AA/AMPS is particularly suitable to be used in water quality of high pH, high alkaline and high hardness, it is one of the ideal scale inhibitor and dispersant on high concentration index.

AA/AMPS can be used as scale inhibitor and dispersant in open circulating cooling water system, oilfield refill water system, metallurgy system and iron & steel plants to prevent sediment of ferric oxide. 
When built with organophosphorines and zinc salt, the suitable pH value is 7.0~9.5.

AA/AMPS can also be used as dyeing auxiliaries for textile.

PRODUCTION of AA/AMPS: The copolymer of sodium polyacrylic acid and 2-acrylamide-2-methyl propane sulfonic acid (AMPS) can be prepared by radical polymerization process.



Applications
AA/AMPS sulfonated copolymer was developed to control phosphate scale in industrial water treatment processes, including:
• Cooling towers
• Boilers up to 150°C
• Mining
• Industrial production where water may contact animal feed

Benefits
AA/AMPS sulfonated copolymer has been comprehensively evaluated against leading sulfonated polymers as well as against iron dispersant agents. 


Study results indicate:

1. Low free monomer level
• More stable formulation
• Reduced HSE exposure for formulators and their customers
• Meets FDA CFR 173.310 resulting in peace of mind for formulators when it comes to ensuring safety of steam in contact with food
2. Better scale inhibition of calcium phosphate than 60/40 wt% AA/AMPS copolymers
3. Stabilizes iron at lower active treatment level than 60/40 wt% AA/AMPS copolymers
4. Effective at dispersing clays and other debris that may be present in systems which are open to the atmosphere
5. Effective zinc stabilizer to prevent precipitation
6. Stable over a wide pH range


Performance
1. Free monomer level below 250 ppm for more stable formulations and reduced HSE exposure for formulators and their customers
In typical AA/AMPS copolymers the residual acrylic acid and residual AMPS can be 1000 ppm or higher. 
For a number of applications such as animal feed, it is required that the sum of the monomers (a total of acrylic acid and AMPS) be less than 500 ppm.

The proprietary process used to produce AA/AMPS sulfonated copolymer generates materials with less than 250 ppm total monomer and, in most cases, less than 100 ppm total monomer. 
Residual monomers can be toxic to both humans and animals. 
This very low level of monomer minimizes the potential health hazards of residual monomers to both the formulators and field personnel.

2. Better calcium phosphate scale inhibition than other 60/40 wt% AA/AMPS copolymers
AA/AMPS sulfonated copolymer and a competitive AA/AMPS copolymer were tested for calcium phosphate scale inhibition using the following conditions:

Typical Calcium phosphate static test conditions
Calcium 200 ppm
Iron 2 ppm
Phosphate 10 ppm
Time 17 hours
Temperature 70°C
pH 8 (buffered with sodium borate)


3. Better Iron dispersion than AA/AMPS copolymers
Our AA/AMPS Copolymer sulfonated copolymer and a competitive AA/AMPS copolymer were tested for iron stabilization using the following conditions:

Typical iron stabilization static test conditions
Calcium 200 ppm
Iron 2 ppm
Phosphate 10 ppm
Time 17 hours
Temperature 70°C
pH 8 (buffered with sodium borate)



4. Effective dispersing agent
Our AA/AMPS Copolymer sulfonated copolymer is effective at dispersing clays and other debris that may be present in systems which are open to the atmosphere (e.g., cooling towers). 
A dispersancy test was conducted using the following conditions.

Dispersancy test conditions
Kaolin clay 2 weight percent
Polymer dosage 2 ppm, 5 ppm
Polymer mix time 5 minutes
Settling time 17 hours
Temperature 21°C


5. Effective zinc stabilizer
When our AA/AMPS sulfonated copolymer is used in formulations containing zinc for corrosion control, it is an effective zinc stabilizer to prevent precipitation.

Typical zinc stabilization static test conditions
Zinc 5 ppm
Calcium 100 ppm
Magnesium 35 ppm
Carbonate 180 ppm
Time 17 hours
Temperature 70°C



6. Stable across a wide range of pH levels
The stability of additives across a wide pH range is important for flexibility in designing water treatment formulations.
Stability tests were performed using Our AA/AMPS Copolymer sulfonated copolymer in two high-stress formulations – one simulating a highly acidic environment (pH 1~2), and one simulating an alkaline environment (pH ~13).


Chemistry
AA/AMPS sulfonated copolymer is a Acrylic Acid/AMPS copolymer that inhibits the formation of calcium phosphate scale while dispersing iron, zinc, and phosphates.




Properties:
AA/AMPS is the copolymer of acrylic acid and 2-acrylamide-2-methylpropane sulfonic acid. 
Due to including carboxylic group (scale inhibition and dispersion) and sulfonic acid group (strong polarity) in this copolymer, AA/AMPS has high calcium tolerance and good scale inhibition for calcium phosphate, calcium carbonate and zinc scale.

When built with organophosphines, the synergic effect is obvious. 
AA/AMPS copolymer is suitable to be used in water quality of high pH and high alkaline. 
AA/AMPS copolymer is one of the ideal scale inhibitor and dispersant on high concentration index.

CAS No.: 40623-75-4

Structural Formula:

AA-AMPS

Specifications:
Item Index
Appearance Colorless or light yellow liquid
Solid content, % 40 Min.
Free monomer (as AA), % 0.8 Max.
Density (20℃), g/cm3 1.15 Min.
pH (1% water solution) 3.5-4.5
Viscosity, mpa.s 90-300

Usage:
AA/AMPS can be used as a scale inhibitor and dispersant in open circulating cool water system, oilfield refill water system, metallurgy system, and iron & steel plants to prevent sediment of ferric oxide. 
When built with organophosphine and zinc salt, the suitable pH value is 7.0~9.5.

AA/AMPS copolymer can also be used as dyeing auxiliaries for textiles.

Package and Storage:
200L plastic drum, IBC(1000L), customers’ requirements. Storage for ten months in a shady room and dry place.

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