PURANOL P 156

Puranol P 156 improves resilience, compression recovery, and fatigue resistance, which are crucial for applications exposed to repeated mechanical stress.
Puranol P 156 supports fine and uniform cell structure, contributing to better comfort and predictable mechanical properties.
Puranol P 156 also enhances airflow within foam structures, reducing heat build-up in bedding or seating applications.

CAS Number: Not uniquely defined. Possibly within class “polyether polyol” (some polyether polyols use CAS 9003-11-6)
EC / EINECS Number: Not publicly identified for P156 specifically
Molecular Formula: Not fixed (polymeric mixture) — no single formula
Nominal Molecular Weight (Mn): ~5,000 g/mol (per the manufacturer)

SYNONYMS:
Puranol P 156, Puranol P156, Puranol P-156, P-156 (Puranol), Puranol Polyether P156, Puranol viscoelastic polyol, glycerol ethoxylated propoxylated (polyether), polyether polyol (Puranol P156)

Puranol P 156 is a high-reactivity polyether polyol designed primarily for flexible polyurethane foam systems, especially where superior comfort, elasticity, and resilience are required.
Puranol P 156 is produced by the polymerisation of propylene oxide and ethylene oxide on a glycerol initiator, which creates a trifunctional backbone offering good crosslinking ability.

Puranol P 156 belongs to the HR (High Resilience) family of polyols, commonly used in seating foams, mattresses, automotive interiors, and cushioning materials.
The nominal molecular weight is approximately 5,000 g/mol, giving Puranol P 156 an ideal balance between flexibility and structural strength.

Puranol P 156 is usually a clear to slightly hazy viscous liquid with low odour, good processability, and stable behaviour during storage under normal conditions.
Because Puranol P 156 is a polymeric commercial grade, it is a mixture of oligomer chains made from alkylene oxides (typically propylene oxide and/or ethylene oxide) built on a glycerol or other polyfunctional starter.

That polymeric nature means Puranol P 156 does not have a single, simple molecular formula the way a small molecule does; instead its identity is described by typical analytical/functional parameters (hydroxyl value, functionality, nominal molecular weight, primary-OH content, viscosity, water content, etc.) reported on the product’s Technical Data Sheet (TDS).

Puranol P 156 is described as “low functionality, large molecular weight, good flexibility of molecular chain, high content of primary hydroxyl, strong reaction activity, and no BHT.

USES and APPLICATIONS of PURANOL P 156:
Puranol P 156 improves resilience, compression recovery, and fatigue resistance, which are crucial for applications exposed to repeated mechanical stress.
Puranol P 156 supports fine and uniform cell structure, contributing to better comfort and predictable mechanical properties.

Puranol P 156's controlled reactivity enables smoother processing, more stable cream and rise times, and reduced risk of foam shrinkage or collapse.
Puranol P 156 also enhances airflow within foam structures, reducing heat build-up in bedding or seating applications.

Puranol P 156's EO-modified surface improves compatibility with water as blowing agent and improves miscibility with other polyols in blended formulations.
One of the key benefits of Puranol P 156 is its ability to create flexible foams with a premium feel—soft yet supportive.

Puranol P 156 enhances load-bearing performance without increasing overall foam hardness.
Puranol P 156 also reduces the density needed to achieve desired physical properties, making it cost-effective.
Puranol P 156's high reactivity allows producers to speed up production cycles, improve foam quality consistency, and reduce defects.

Puranol P 156 also promotes long-term hydrolytic stability, meaning the foam maintains performance even in humid environments.
Its inherently low odour and low VOC contribution make Puranol P 156 suitable for automotive interiors and living-space applications where emissions must be tightly controlled.

Puranol P 156 is primarily used in flexible polyurethane foam manufacturing, where high comfort and dynamic recovery are necessary.
Puranol P 156 is widely applied in automotive seats, furniture cushions, sofa systems, mattresses, cold-cure foam, HR block foam, and premium bedding materials.

Puranol P 156'reactivity profile allows foam producers to achieve excellent cell structure, consistent airflow, and improved load-bearing properties.
Because of its high molecular weight and tailored distribution of EO and PO units, Puranol P 156 provides a soft foam feel without compromising durability.

Manufacturers also use Puranol P 156 in composite foam, acoustic insulation foam, microcellular cushioning, and impact-absorption materials.
Puranol P 156 exhibits a combination of high molecular flexibility and good crosslinking ability, making it suitable for foams that must rebound quickly and maintain shape over long-term use.

Puranol P 156 is targeted at viscoelastic (memory-foam / hypersoft) and pneumatic foam applications: mattresses, toppers, pillows, seating and related products where very soft feel, slow recovery (viscoelastic behaviour), and low temperature performance are required.
Because Puranol P 156 is a low-functionality, high-molecular-weight polyol with high primary-OH content, it promotes flexible polymer networks with fewer crosslinks per chain, which produces the soft, slow-recovering foam texture desired in viscoelastic applications.

Puranol P 156 is therefore used by formulators of slabstock and moulded viscoelastic foams where control of reactivity and cell structure is critical.
Application of Puranol P 156: mattresses, automobile seats, interior.

Puranol P 156 is not from granul and burrs obtained from scrap plastics for secondary use.
Puranol P 156 is a commercial polyether polyol produced under the Puranol brand (Jiahua).

Puranol P 156 is formulated for viscoelastic / hypersoft foam and pneumatic foam applications and is described by the manufacturer as a low-functionality, high-molecular-weight polyether with a high content of primary hydroxyl groups and strong reactivity.
Puranol P 156 is intended to give foams with soft feel, good flexibility of the molecular chain and good low-temperature mechanical performance.

BENEFITS AND KEY CHARACTERISTICS of PURANOL P 156:
Puranol P 156 is excellent softness and flexibility for viscoelastic foams, good low-temperature mechanical properties, high primary-OH content (which increases reactivity and helps predictable cure), and formulation reliability when the correct catalysts, blowing agents and isocyanates are selected.
Puranol P 156 is explicitly noted to be produced without BHT (butylated hydroxytoluene) antioxidant in that product family description, which may be relevant for downstream processing or regulatory/compatibility concerns.

PRACTICAL FORMULATION NOTES of PURANOL P 156:
Because Puranol P 156 is designed for viscoelastic foam, formulators typically combine it with appropriate catalysts (amine and tin catalysts as required), surfactants, controlled water or physical blowing agents, and isocyanates (MDI or MDI blends are common for viscoelastic formulations).

The high primary-OH content of Puranol P 156 permits predictable gelling and crosslinking behavior; nevertheless the final foam properties depend strongly on stoichiometry, catalyst balance, and processing temperature.
If you are developing a formulation, obtain the precise TDS (hydroxyl number, viscosity @25 °C, water content, acid value, functionality and recommended processing parameters) for the specific Puranol P 156 lot.

PHYSICAL and CHEMICAL PROPERTIES of PURANOL P 156:
CAS Number: Not uniquely defined. Possibly within class “polyether polyol” (some polyether polyols use CAS 9003-11-6)
EC / EINECS Number: Not publicly identified for P156 specifically
Molecular Formula: Not fixed (polymeric mixture) — no single formula
Nominal Molecular Weight (Mn): ~5,000 g/mol (per the manufacturer)
Appearance / Physical State: viscous liquid, clear to light-yellow (typical for technical polyether polyols)
Functionality: low functionality (Puranol’s P-series for viscoelastic foam are typically low functionality to promote soft flexible networks)
Hydroxyl (OH) Characteristics: high primary-OH content and strong reaction activity; the OH number must be used for stoichiometric calculations with isocyanates

Viscosity: moderately to highly viscous at room temperature; exact viscosity (e.g., mPa·s at 25 °C) is provided in the TDS
Water / Moisture: low water content required for foam processing; maximum water content specified in TDS (moisture reacts with isocyanate generating CO₂, affecting foam structure)
Solubility / Miscibility: miscible with many polyurethane-compatible polyols and solvents; behaves as non-volatile, low-vapour-pressure liquid under normal handling
Thermal / Flammability: not volatile; flash point and thermal stability provided in TDS/SDS; polyether polyols generally have relatively high flash points compared with low-molecular-weight organics

FIRST AID MEASURES of PURANOL P 156:
-Description of first-aid measures
*General advice:
Show this material safety data sheet to the doctor in attendance.
*If inhaled:
After inhalation: 
Fresh air.
*In case of skin contact: 
Take off immediately all contaminated clothing. 
Rinse skin with
water/ shower.
*In case of eye contact:
After eye contact: 
Rinse out with plenty of water. 
Call in ophthalmologist. 
Remove contact lenses.
*If swallowed:
After swallowing: 
Immediately make victim drink water (two glasses at most). 
Consult a physician.
-Indication of any immediate medical attention and special treatment needed.
No data available

ACCIDENTAL RELEASE MEASURES of PURANOL P 156:
-Environmental precautions:
Do not let product enter drains.
-Methods and materials for containment and cleaning up:
Cover drains. 
Collect, bind, and pump off spills. 
Observe possible material restrictions. 
Take up dry. 
Dispose of properly. 
Clean up affected area.

FIRE FIGHTING MEASURES of PURANOL P 156:
-Extinguishing media:
*Suitable extinguishing media:
Carbon dioxide (CO2) 
Foam 
Dry powder
*Unsuitable extinguishing media:
For this substance/mixture no limitations of extinguishing agents are given.
-Further information:
Prevent fire extinguishing water from contaminating surface water or the ground water system.

EXPOSURE CONTROLS/PERSONAL PROTECTION of PURANOL P 156:
-Control parameters:
--Ingredients with workplace control parameters:
-Exposure controls:
--Personal protective equipment:
*Eye/face protection:
Use equipment for eye protection. 
Safety glasses
*Body Protection:
protective clothing
*Respiratory protection:
Recommended Filter type: Filter A 
-Control of environmental exposure:
Do not let product enter drains.

HANDLING and STORAGE of PURANOL P 156:
-Conditions for safe storage, including any incompatibilities:
*Storage conditions:
Tightly closed. 
Dry.

STABILITY and REACTIVITY of PURANOL P 156:
-Chemical stability:
The product is chemically stable under standard ambient conditions (room temperature).
-Possibility of hazardous reactions:
No data available