Super Absorbent PolymersSuper Absorbent Polymers
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Chemistry of Super Absorbent Fibres

What is OASIS SAF®?

OASIS Super Absorbent Fibre (OASIS® SAF) is manufactured using state-of-the-art production methods and control protocols.  This yields a truly high performance and versatile OASIS SAF® absorbency range.

Manufacturing

The raw materials of OASIS SAF® are mixed together with water and reacted using a polymerization initiator.  The very high conversion of monomer raw materials to polymer is achieved.

The aqueous polymer solution is then extruded into a hot air stream and dried.  The filaments are then heated to dry and cure the polymer, producing filaments of OASIS SAF® which are insoluble in water.  Moisture may be added to the fibres to aid processing.

Chemistry of Super Absorbent Fibres
Acrylic Acid
Methyl Acrylate
NaOH
Polymerization in water Polymer Extrusion:
Evaporation of water produces cylindrical fibres of precise diameter & length
Thermal & conditioning treatments.
Product Packaging.

Chemistry

OASIS SAF® is a cross-linked terpolymer of acrylic acid (AA), methylacrylate (MA) and a small quantity of a special Acrylate/methacrylate monomer (SAMM) in which the acrylic acid is partially neutralized to the sodium salt.  The cross-links between the polymer chains are formed as ester groups by reaction between the acid groups in acrylic acid and the hydroxyl groups in hydroxypropylmethacrylate.

Chemistry of Super Absorbent Fibres

Where:

AA = { -CH2CH(COOH) } from acrylic acid
AANa = { -CH2CH(COONa) } from acrylic acid and NaOH
MA = { -CH2CH(COOCH3) } from methylacrylate
R =  - COOCH2CH(CH3) –
The values of W, X, Y & Z depend on the quantities of monomer raw materials used.
The values of U and V depend on the amount of heat treatment applied.

Physical Properties

OASIS SAF® does not melt.  It begins to decompose very slowly at temperatures above 200° C.  A Glass Transition Temperature (per TgA) is not measurable. 
Fibre density is approximately 1.4 g/ml.

Chemistry of Super Absorbent Fibres - Physical Properties