Polymaleic Acid - Maxinol PM 200 Polymers
About Polymaleic Acid – Maxinol PM200
Aquapharm is an independent, family owned business manufacturing high performance polymers, phosphonates, biocides and biodegradable chelants which are delivered worldwide for home laundry & industrial cleaning, membrane & thermal desalination, and industrial water treatment applications. With investment into state-of-the-art research & development facilities, processes & people, our mission is to equip your business with the most cost-effective solutions.
By focussing on the demands of recirculating evaporative cooling water processes, we have developed a new improved polymaleic acid (PMA), Maxinol® PM200. PMA’s are long established components of cooling water formulations, but their variable quality can often lead to product instability & formulation problems. Such problems are avoided using Aquapharm’s Maxinol® PM200.
MAXINOL, PM200 ADVANTAGES:
- has all but eliminated residual monomer & inactive low molecular weight impurities
- is stable to pH adjustment, conferring greater resilience to formulations and eliminating formulated product quality issues
- has broader deposit control properties for both calcium carbonate and calcium sulfate
MAXINOL PM200 PHYSICAL PROPERTIES
PRODUCT STABILITY
Process development at Aquapharm has enabled an industrial scale solvent polymerisation of maleic anhydride with unrivalled efficiency. Aquapharm delivers polymaleic acid with minimal impurities and by-products, enhancing formulation stability and helping to build confidence in your brand.
This can be observed by simple adjustment of product pH. Using an alternative solvent based polymaleic acid (PMA), impurities readily precipitate, creating sediment and changing product appearance. Maxinol® PM200 stability is maintained throughout these adjustments. With Maxinol® PM200 you choose higher quality and are less likely to experience formulation stability problems commonly associated with other solvent based PMA’s.
HALOGEN TOLERANCE
Maxinol® PM200 is at least as halogen tolerant as other based PMA’s and will provide maximum flexibility for controlling microbial activity in a cooling system.
MAXINOL® PM200 CALCIUM CARBONATE & CALCIUM SULFATE INHIBITION PROPERTIES
Simple jar testing is frequently used to assess additives for deposit control properties. Figures 1 & 2 reveal the superior performance properties of Maxinol® PM200 versus an alternative solvent based polymaleic acid (PMA).
Under severely stressed conditions (e.g high cycles of concentration), process water can become supersaturated with respect to calcium sulfate. Maxinol® PM200 offers an additional feature of effectively controlling calcium sulfate precipitation where other PMA’s do not.
MAXINOL® PM200
CALCIUM CARBONATE DYNAMIC TUBE BLOCK TEST
Dynamic tube block testing is another technique used to assess the properties of additives, in this case their efficiency in supressing crystal growth at surfaces. Figure 3 summarises data from experiments which measure how pressure builds in stainless steel capillary tubes when solutions of anions & cations are mixed together, in the absence & presence of inhibitors. Clearly, Maxinol® PM200 is able to moderate calcium carbonate growth long after alternative solvent polymaleic acid has been overwhelmed. Polymers are tested at 1 mg/L as solids.
Polymaleic Acid MAXINOL PM200 Summary
FEATURES/BENEFITS:
- Improved polymerisation efficiency delivers a new high-purity maleic homopolymer
- All-organic formulations are robust & resilient eliminating stability & quality problems
- Efficiently stabilises recirculating cooling water at high cycles of
concentration, offering both carbonate & sulfate deposit control - Minimises fresh water make-up, chemical treatment & blowdown costs
- Effective over a wide range of water chemistry, providing greater flexibility &
protection during system upsets - Reduction / elimination of maintenance costs & production Losses.
