This article is about sodium polyacrylate.
Sodium polyacrylate belongs to superabsorbent polymers with the chemical formula [−CH2−CH(CO2K)−]n.
In functionality, it can absorb hundreds of times its weight of water and then turns to water gel form.
In the safety aspect, it’s non-toxic, non-pollutant, and harmless. It’s easy to find the MSDS (Material Safety Data Sheet).
|Appearance||white powder/particle (turn to transparent crystal after absorbing water)|
|Function||Absorbing, retaining, or blocking liquid|
|Physical property||Non-toxic, harmless, non-polluting, natural degradation|
|Market price||USD 800-3000 per ton (updated in 2018)|
It consists of a set of polymeric chains that are parallel to each other and regularly linked to each other by cross-linking agents, thus forming a network.
When water comes into contact with one of these chains, it is drawn into the molecule by osmosis. Water rapidly migrates into the interior of the polymer network where it is stored.
Tip: Metal ions can deeply reduce or destroy the water-absorbing capacity of sodium polyacrylate.
There’re many types of sodium polyacrylate for different uses, such as:
- starch-based type (which is biodegradable),
- catalyst improved type (for water blocking of cable),
- cation type (for concrete additive),
- *defective type & recycled type (for waste liquid absorption).
Sodium polyacrylate can
- be used directly;
- be used as the raw material of products.
Here are the details:
1. Be used directly
- for production
water blocking, inflatable rubber, thickening agent, fire-retardant gel, desiccant agent, thermal storage agent.
- for building
concrete protection, anti-foggy agent.
- for environment
waste liquid control, excreta collection.
drilling fluid, collection of tattoo liquid waste, oil-water separation.
2. Be used as a raw material
- product for animals
pet pads, a drown-free water source for feeder insects.
- products for personal care
paper diapers, sanitary napkins, nursing mats, and contact lenses.
- products in home
the ice pack, fragrance carrier, water beads, growing toys, cosmetics, solid waterbed.
cable, urine bag, anti-flood bag, instant snow, waterproof paint.