Sodium polyacrylate 2915728 219856600 2008-06-17T04:33:20Z Jonny-mt 1514772 Creating really rough infobox including new image {{chembox new | Name = Sodium polyacrylate | ImageFile = Sodium polyacrylate.jpg | ImageSize = 300 | IUPACName = | SystematicName = | OtherNames = | Section1 = {{Chembox Identifiers | Abbreviations = | CASNo = | EINECS = | EINECSCASNO = | PubChem = | SMILES = | InChI = | RTECS = | MeSHName = | ChEBI = | KEGG = | ATCCode_prefix = | ATCCode_suffix = | ATC_Supplemental =}} | Section2 = {{Chembox Properties | Formula = Repeating polymer: -CH<sub>2</sub>-CH(COONa)- | MolarMass = | Appearance = | Density = | MeltingPt = | Melting_notes = | BoilingPt = | Boiling_notes = | Solubility = | SolubleOther = | Solvent = | LogP = | VaporPressure = | HenryConstant = | AtmosphericOHRateConstant = | pKa = | pKb = }} | Section3 = {{Chembox Structure | CrystalStruct = | Coordination = | MolShape = }} | Section4 = {{Chembox Thermochemistry | DeltaHf = | DeltaHc = | Entropy = | HeatCapacity = }} | Section5 = {{Chembox Pharmacology | AdminRoutes = | Bioavail = | Metabolism = | HalfLife = | ProteinBound = | Excretion = | Legal_status = | Legal_US = | Legal_UK = | Legal_AU = | Legal_CA = | PregCat = | PregCat_AU = | PregCat_US = }} | Section6 = {{Chembox Explosive | ShockSens = | FrictionSens = | ExplosiveV = | REFactor = }} | Section7 = {{Chembox Hazards | ExternalMSDS = | EUClass = | EUIndex = | MainHazards = | NFPA-H = | NFPA-F = | NFPA-R = | NFPA-O = | RPhrases = | SPhrases = | RSPhrases = | FlashPt = | Autoignition = | ExploLimits = | LD50 = | PEL = }} | Section8 = {{Chembox Related | OtherAnions = | OtherCations = | OtherFunctn = | Function = | OtherCpds = }} }} '''Sodium polyacrylate''' also named '''acrylic sodium salt [[polymer]]''' or simply '''ASAP''' (repeating unit: -CH<sub>2</sub>-CH(COONa)- ) is a polymer widely used in consumer products. Acrylate polymers generally are considered to possess an anionic charge. While sodium neutralized acrylates are the most common form used in industry, there are also other salts available including potassium, lithium and ammonium. ==Applications== Acrylates and acrylic chemistry have a wide variety of industrial uses that include:<br /> 1. Sequestering agents in detergents. (By binding hard water elements such as Ca and Mg, the surfactants in detergents work more efficiently.)<br /> 2. Thickening agents.<br /> 3. Coatings.<br /> 4. Super absorbent polymers. These cross-linked acrylic polymers are used in baby diapers. Co-polymer versions are used in agriculture and other specialty absorbent applications. These cross-linked acrylic polymers are referred to as "[[superabsorbent polymer|Super Absorbents]]" and "Water Crystals". The origins of super absorbent polymer chemistry trace back to the early 1960s when the US Department of Agriculture developed the first super absorbent polymer materials. [http://www.m2polymer.com/html/history_of_superabsorbents.html] This chemical is featured in the [[Maximum Absorbency Garment]] used by NASA. ==Trivia== It is nicknamed the "super-slurper" because of its ability to absorb as much as 400 to 800 times its mass in water. ==See also== * [[Polyacrylamide]], a cationic charged polymer used in straight-chain form or can be co-polymerized with acrylic acid and other monomers. In cross-linked form, these blended co-polymers can yield specialty super absorbent polymers. ==References== [[Category: Polymers]] [[es:Poliacrilato sódico]] [[ja:ポリアクリル酸ナトリウム]] [[uk:Поліакрилат натрію]]