Polyamine CAS 39660-17-8
Polyamine is a low molecular weight, very high charge density cationic polyamine. It is supplied as a clear to opaque liquid, low viscosity aqueous solution. It is a cationic polymer that performs well in the pH range 2.5 to 12.0.
Polyamines are low molecular weight aliphatic polycations, highly charged and ubiquitously present in all living cells. Interest has been increasing during the last 30 years in the naturally abundant polyamines putrescine (diamine), spermidine (triamine) and spermine (tetramine), which were demonstrated to be involved in a large number of cellular processes. For example, polyamines participate in modulation of chromatin structure, gene transcription and translation, DNA stabilization, signal transduction, cell growth and proliferation, migration, membrane stability, functioning of ion channels and receptor-ligand interactions Polyamines seem to exert their role through ionic interactions, owing to their unique structural feature of regularly spaced positive charges.
Inside the cell polyamines are present in nearly millimolar concentrations. There is equilibrium between polyamines that are bound to different polyanionic molecules (mainly DNA and RNA) and free polyamines. The free polyamine pool represents 7-10% of the total cellular polyamine content. Only the free intracellular polyamines are available for immediate cellular needsand therefore are subject to strict regulation. Polyamines are maintained within very narrow range because decrease in their concentrations inhibits cell proliferation while excess appears to be toxic. Therefore, the free polyamine pools are regulated in a very fast, sensitive and precise manner. This regulation is achieved at four levels: de novo synthesis, interconversion, terminal degradation and transport.
[Application in treatment industry]
Polyamine is an organic polymer that is very effective in coagulating colloidal dispersions. It is especially effective as a deposit control agent when applied to pulp, stock, wires, or felts. It is also effective in removing organics and color from recirculating or effluent streams in pulp and paper mills. However, the most cost effective product should be selected based on a performance evaluation using the particular feed or stream intended for treatment. It may be fed neat or diluted in-line into the point of treatment.
The dosage will depend upon the severity of the problem. When applied to pulp or stock for deposit control, the dosage can range from 0.25 - 2.5 Kgs of polyamine per ton of pulp or stock (dry basis).
When it is applied for control of deposits on the forming fabric, the dosage can range from 0.10 - 1.0 ml/min per 1 foot of fabric width.
[Storage and handling]
Polyamine should be stored at 10–32°C.Short-term exposure to higher or lower temperatures will not normally harm the product. If frozen, it should be warmed to 26 – 37°C. and mixed well prior to use.
The shelf life:12 months.
Keywords: Polyamine, Polyamines
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