SODIUM POLYACRYLATE HYDROGENATED POLYDECENE TRIDECETH-6

SODIUM POLYACRYLATE HYDROGENATED POLYDECENE TRIDECETH-6
Sodium polyacrylate is the sodium salt of polyacrylic acid. It is a high molecular weight, anionic polymer composed of repeating acrylate units: [–CH2–CH(CO2Na)–]n. 
Commercial grades vary widely in molecular weight, particle size, degree of crosslinking, and co‑polymer content (e.g., acrylate/acrylamide co‑polymers or grafted poly(ethylene oxide)) to tune absorption, gel strength, and mechanical properties.

CAS number (commonly used): 9003‑04‑7

Synonyms: 

Poly(sodium acrylate); PAAS; polyacrylic sodium salt; polyacrylate sodium salt; superabsorbent polymer (SAP) when crosslinked
INCI / Use name: Sodium polyacrylate
Synthesis and Manufacturing

Base chemistry: Polymerization of acrylic acid followed by neutralization with sodium hydroxide (or use of sodium acrylate monomer). Two primary routes:
Solution or bulk polymerization of acrylic acid, followed by neutralization to sodium salt.
Polymerization of sodium acrylate monomer (aqueous solution polymerization).
Crosslinking: For SAP grades, a small fraction of multifunctional crosslinker (e.g., N,N′‑methylenebisacrylamide, divinylbenzene, triallyl cyanurate derivatives) is introduced during polymerization or by post‑treatment to generate a lightly crosslinked network.
Post‑processing: Grinding, sieving, classification to produce desired particle size; drying; optional surface treatment (for improved gel strength or reduced dust). For hygienic applications, additional purification or quality control is performed.

Physicochemical properties
Appearance: White to off‑white powder (non‑crosslinked) or granular particles (crosslinked SAP).
Solubility: Sodium polyacrylate is water‑swellable. Linear grades dissolve or form viscous solutions depending on molecular weight; crosslinked SAP swells but does not dissolve in water.
pKa: The parent acrylic acid has pKa ~4.25; the sodium salt behaves as a strong polyelectrolyte with ionizable carboxylate groups. Degree of neutralization influences swelling and rheology.
Thermal: Degradation typically begins above 200°C; glass transition depends on polymer composition and moisture content.
Viscosity and rheology: Linear sodium polyacrylate solutions show strong shear‑thinning and thickening behavior; crosslinked grades show elastic hydrogel properties when swollen.

Functional roles and applications
Water‑absorbent applications: Diapers, sanitary products, pet‑litter, agricultural water retention agents.
Personal care and cosmetics: As a thickener, film former, absorbent (matting powders), and stabilizer for emulsions or suspensions.
Industrial uses: Detergents (dispersant for preventing redeposition), paper industry (retention aids), oil and gas (fluid loss control in drilling fluids when formulated properly), concrete and cement modifiers (water retention), and soil conditioners.
Biomedical uses: Wound dressings and controlled release matrices (medical‑grade crosslinked SAP with stringent purity controls).

Analytical methods and quality control
Molecular weight distribution: Gel permeation chromatography (GPC/SEC) after appropriate dissolution and sample prep for linear grades.
Degree of neutralization: Titration (acid–base) and FTIR peak analysis (carboxylate/carboxylic acid ratio).
Particle size and morphology: Laser diffraction, sieve analysis, and SEM for particle surface.
Swelling capacity: Gravimetric swelling tests (grams of water per gram polymer) under standardized ionic strength and pH.
Residual monomer: GC/MS or HPLC for trace acrylic acid or unreacted monomer.
Crosslink density: Mechanical testing of swollen gel and indirect methods (swelling ratio correlated to Flory–Rehner theory).

Formulation considerations
pH sensitivity: Performance is pH‑dependent due to ionizable carboxylate groups—higher ionic strength or lower pH reduces swelling.
Ionic strength: Presence of salts (NaCl, Ca2+, Mg2+) dramatically reduces swelling due to charge screening and ionic crosslinking.
Compatibility: Generally compatible with anionic and nonionic surfactants; cationic polymers can interact strongly and reduce performance.
Dust control and safety in handling: Use of pregelled or surface‑treated grades can reduce dust; appropriate PPE is recommended for powdered forms.

SAFETY INFORMATION ABOUT SODIUM POLYACRYLATE HYDROGENATED POLYDECENE TRIDECETH-6

 
First aid measures:
Description of first aid measures:
General advice:
Consult a physician. 
Show this safety data sheet to the doctor in attendance.
Move out of dangerous area:
 
If inhaled:
If breathed in, move person into fresh air. 
If not breathing, give artificial respiration.
Consult a physician.
In case of skin contact:
Take off contaminated clothing and shoes immediately. 
Wash off with soap and plenty of water.
Consult a physician.
 
In case of eye contact:
Rinse thoroughly with plenty of water for at least 15 minutes and consult a physician.
Continue rinsing eyes during transport to hospital.
 
If swallowed:
Do NOT induce vomiting. 
Never give anything by mouth to an unconscious person. 
Rinse mouth with water. 
Consult a physician.
 
Firefighting measures:
Extinguishing media:
Suitable extinguishing media:
Use water spray, alcohol-resistant foam, dry chemical or carbon dioxide.
Special hazards arising from the substance or mixture
Carbon oxides, Nitrogen oxides (NOx), Hydrogen chloride gas
 
Advice for firefighters:
Wear self-contained breathing apparatus for firefighting if necessary.
Accidental release measures:
Personal precautions, protective equipment and emergency procedures
Use personal protective equipment. 
 
Avoid breathing vapours, mist or gas. 
Evacuate personnel to safe areas.
 
Environmental precautions:
Prevent further leakage or spillage if safe to do so.
Do not let product enter drains.
Discharge into the environment must be avoided.
 
Methods and materials for containment and cleaning up:
Soak up with inert absorbent material and dispose of as hazardous waste. 
Keep in suitable, closed containers for disposal.
 
Handling and storage:
Precautions for safe handling:
Avoid inhalation of vapour or mist.
 
Conditions for safe storage, including any incompatibilities:
Keep container tightly closed in a dry and well-ventilated place. 
Containers which are opened must be carefully resealed and kept upright to prevent leakage.
Storage class (TRGS 510): 8A: Combustible, corrosive hazardous materials
 
Exposure controls/personal protection:
Control parameters:
Components with workplace control parameters
Contains no substances with occupational exposure limit values.
Exposure controls:
Appropriate engineering controls:
Handle in accordance with good industrial hygiene and safety practice.
Wash hands before breaks and at the end of workday.
 
Personal protective equipment:
Eye/face protection:
Tightly fitting safety goggles. 
Faceshield (8-inch minimum). 
Use equipment for eye protection tested and approved under appropriate government standards such as NIOSH (US) or EN 166(EU).
 
Skin protection:
Handle with gloves. 
Gloves must be inspected prior to use. 
Use proper glove
removal technique (without touching glove's outer surface) to avoid skin contact with this product. 
Dispose of contaminated gloves after use in accordance with applicable laws and good laboratory practices. 
Wash and dry hands.
 
Full contact:
Material: Nitrile rubber
Minimum layer thickness: 0.11 mm
Break through time: 480 min
Material tested:Dermatril (KCL 740 / Aldrich Z677272, Size M)
Splash contact
Material: Nitrile rubber
Minimum layer thickness: 0.11 mm
Break through time: 480 min
Material tested:Dermatril (KCL 740 / Aldrich Z677272, Size M)
It should not be construed as offering an approval for any specific use scenario.
 
Body Protection:
Complete suit protecting against chemicals, The type of protective equipment must be selected according to the concentration and amount of the dangerous substance at the specific workplace.
Respiratory protection:
Where risk assessment shows air-purifying respirators are appropriate use a fullface respirator with multi-purpose combination (US) or type ABEK (EN 14387) respirator cartridges as a backup to engineering controls. 
 
If the respirator is the sole means of protection, use a full-face supplied air respirator. 
Use respirators and components tested and approved under appropriate government standards such as NIOSH (US) or CEN (EU).
Control of environmental exposure
Prevent further leakage or spillage if safe to do so. 
Do not let product enter drains.
Discharge into the environment must be avoided.
 
Stability and reactivity:
Chemical stability:
Stable under recommended storage conditions.
Incompatible materials:
Strong oxidizing agents:
Hazardous decomposition products:
Hazardous decomposition products formed under fire conditions. 
Carbon oxides, Nitrogen oxides (NOx), Hydrogen chloride gas.
 
Disposal considerations:
Waste treatment methods:
Product:
Offer surplus and non-recyclable solutions to a licensed disposal company. 
Contact a licensed professional waste disposal service to dispose of this material.
Contaminated packaging:
Dispose of as unused product