PRODUCTS

WANNATE PM-400

Wannate PM-400 can be used in the production of rigid PU foams and polyisocyanurate foams.
Wannate PM-400 is particularly suitable for continuous production of laminated polyisocyanurate sandwich panels.
Wannate PM-400 can be used in rigid polyurethane foam and polyisocyanurate foam systems.

CAS Number: 9016-87-9 (Polymeric MDI)
101-68-8 (4,4'-Methylenediphenyl Diisocyanate)
26447-40-5 (MDI Mixed Isomers)
EC Number: 618-498-9 (Polymeric MDI)
202-966-0 (4,4'-MDI)
247-714-0 (MDI Mixed Isomers)
Molecular Formula: Wannate PM-400 is a polymeric mixture and therefore does not possess a single fixed molecular formula.
Representative monomer formula: C15H10N2O2
Representative polymeric structure: (C15H10N2O2)n
Molecular Weight: Since Wannate PM-400 is a mixture of oligomeric and polymeric isocyanates, no single molecular weight exists.

SYNONYMS:
Polymeric MDI, pMDI, PMDI, Polymeric Methylene Diphenyl Diisocyanate, Polymethylene Polyphenyl Polyisocyanate, Polymeric Diphenylmethane Diisocyanate, MDI Polymer, Aromatic Polyisocyanate, Crude MDI, Polymeric Methylenediphenyl Diisocyanate, Isocyanic Acid Polymethylenepolyphenylene Ester, Polymeric Diphenylmethane Polyisocyanate, Polymeric MDI Resin

Wannate PM-400 is a polymethylene polyphenylene isocyanate.
Wannate PM-400 is a polymeric methylene diphenyl diisocyanate (pMDI) based aromatic polyisocyanate designed for the manufacture of high-performance polyurethane systems.
Wannate PM-400 consists of a complex mixture of monomeric MDI and higher molecular weight polymethylene polyphenyl polyisocyanates containing multiple reactive isocyanate groups.

Compared with lower-functionality polymeric MDI grades, Wannate PM-400 generally provides increased crosslink density, improved structural strength, and enhanced rigidity in cured polyurethane materials.
Wannate PM-400 is high functionality, high viscosity isocyanate.

Wannate PM-400 is a polymeric methylene diphenyl diisocyanate (pMDI) widely used in the polyurethane industry for the production of rigid foam insulation materials and composite products.
Wannate PM-400 is characterized by its high functionality and reactivity, making it suitable for applications that require excellent mechanical strength, dimensional stability, and thermal insulation performance.

Wannate PM-400 serves as a key raw material in the manufacture of rigid polyurethane and polyisocyanurate (PIR) foams used in construction, refrigeration, transportation, and industrial insulation systems.
Wannate PM-400's balanced composition enables efficient processing and contributes to the formation of durable cellular structures with consistent physical properties.

Wannate PM-400 is extensively utilized in sandwich panels, insulation boards, spray foam systems, insulated pipes, and cold-storage facilities where long-term thermal efficiency is essential.
Wannate PM-400 is valued for its ability to enhance foam strength, improve adhesion to various substrates, and support the production of energy-efficient insulation products.

Wannate PM-400 is manufactured to meet the performance requirements of modern polyurethane processing technologies and demanding industrial applications worldwide.

USES and APPLICATIONS of WANNATE PM-400:
Wannate PM-400 exhibits high functionality and high viscosity.
Wannate PM-400 can improve cell homogeneity, dimensional stability of foams and compressive strength vertical to foaming direction.

Wannate PM-400 is particularly suitable for the production of continuously laminated polyisocyanurate large sheets.
Wannate PM-400 is mainly used in the manufacture of high-performance microcellular polyurethane elastomers, molded soft polyurethanes, and white crust foams, including: high resilience foam, memory foam, shoe soles, solid tires, car bumpers, mudguards, shock absorbers, spoilers, steering wheels, Mount headrests, armrests, interior trim parts, etc.

Wannate PM-400 is also widely used in the manufacture of adhesives, coatings, fabric coating finishing agents, etc.
Wannate PM-400 is used in combination with Polyol (white chemical) in the production of PU foam for thermal insulation, soundproofing, and heat preservation in construction projects.
Additionally, Isocyanate is used in the production of panels, spray foam, and molded foam for refrigerators, electric cookers, etc.

Wannate PM-400 is commonly used in combination with Polyol (whitening agent) to create PU foam insulation for thermal and sound insulation in construction projects.
Wannate PM-400 is extensively used in the manufacture of rigid polyurethane insulation foams for buildings, industrial facilities, cold-storage warehouses, refrigerated transportation systems, and energy-efficient construction materials.

Wannate PM-400 is widely utilized in the production of continuous and discontinuous sandwich panels, insulation boards, roofing systems, insulated pipes, and refrigeration equipment where excellent thermal insulation and structural stability are required.
Wannate PM-400 serves as a highly effective binder in engineered wood manufacturing, including oriented strand board (OSB), particleboard, fiberboard, plywood, and structural wood composites.

Wannate PM-400's strong bonding capability improves board strength, moisture resistance, and long-term durability in construction materials.
Wannate PM-400 is widely used in rigid polyurethane foams, insulation products, wood composite binders, structural foams, composite materials, adhesives, and specialty industrial polyurethane applications.

Wannate PM-400 is also employed in spray polyurethane foam systems used for thermal insulation, air barrier applications, waterproofing, and structural reinforcement of residential, commercial, and industrial buildings.
In composite manufacturing, Wannate PM-400 is used to produce lightweight yet mechanically strong composite structures for transportation, infrastructure, and industrial applications.

Wannate PM-400 finds extensive use in polyurethane adhesives, structural bonding systems, laminating adhesives, and specialty industrial sealants requiring high adhesion strength and durability.
Wannate PM-400 is also applied in the production of high-density structural foams, load-bearing polyurethane components, and reinforcement materials used in automotive, marine, mining, agricultural, and heavy industrial equipment.

In addition, Wannate PM-400 is suitable for specialized polyurethane systems designed for infrastructure projects, pipeline insulation, energy-efficient construction technologies, and industrial equipment requiring long-term mechanical reliability.
Its ability to generate highly crosslinked polyurethane networks makes Wannate PM-400 particularly valuable in applications where maximum rigidity, compressive strength, and dimensional stability are critical performance requirements.

Wannate PM-400 can be used the production of rigid PU foam and polyisocyanurate foams; particularly fit for continuous production of laminated polyisocyanurate slab stock foams.
Wannate PM-400 can improve cell homogeneity and dimensional stability of foams and the compressive strength vertical to the foaming direction.
The flame retardancy of polyurethane and polyisocyanurate foams also shows some improvement

-Applications of Wannate PM-400:
Wannate PM-400 is used in the manufacture of rigid or semi-rigid polyurethane foam products.
Wannate PM-400 is used in involving spray foam for sound insulation and thermal insulation.
Wannate PM-400 is used for panels, insulated roofing sheets, refrigerators, water heaters, solar water heaters, freezers, and cold storage facilities.

CHARACTERISTICS of WANNATE PM-400:
Wannate PM-400 is characterized by its relatively high functionality and strong crosslinking performance, making it suitable for demanding polyurethane applications.
Wannate PM-400 provides excellent structural reinforcement due to its ability to form dense three-dimensional polymer networks.

Wannate PM-400's aromatic isocyanate chemistry contributes to outstanding rigidity, dimensional stability, and compressive strength in cured materials.
Wannate PM-400 exhibits reliable compatibility with a broad range of polyether and polyester polyols, allowing formulation flexibility for manufacturers.

Wannate PM-400 is valued for its consistent processing behavior, controlled reaction profile, and ability to produce polyurethane systems with excellent load-bearing characteristics.
Its low volatility and high reactivity make Wannate PM-400 particularly attractive for industrial polyurethane manufacturing processes requiring durability and structural performance.

BENEFITS of WANNATE PM-400:
Wannate PM-400 offers significant benefits in the production of advanced polyurethane materials.
Wannate PM-400 enables the manufacture of polyurethane systems with exceptional mechanical strength, superior rigidity, and outstanding dimensional stability.

Wannate PM-400's high functionality contributes to enhanced compressive strength and improved resistance to deformation under long-term loading conditions.
Wannate PM-400 supports the development of highly efficient insulation products with excellent thermal performance and energy-saving characteristics.

Polyurethane products produced with Wannate PM-400 often exhibit improved resistance to aging, moisture, environmental exposure, and mechanical wear.
Wannate PM-400 helps manufacturers achieve lightweight yet structurally robust materials suitable for demanding engineering applications.

Wannate PM-400's strong adhesion characteristics also improve bonding performance in composite structures, laminated materials, and engineered wood products.
In addition, the high crosslink density achieved with Wannate PM-400 contributes to enhanced durability and long service life in industrial environments.

THE MAIN DIFFERENCE BETWEEN WANNATE PM-200 AND WANNATE PM-400
The main differences between Wannate PM-200 and Wannate PM-400 are reflected in viscosity, functionality and application system.
First of all, Wanhua aggregates mdi, the specific differences are as follows

***In terms of viscosity:
The viscosity of PM200 is small, and this characteristic makes it work better in some systems with high fluidity requirements.
For example, in the production process, a smaller viscosity can make the material flow and mix more easily, thereby ensuring the uniformity and stability of the product.
The viscosity of Wannate PM-400 is large, and relatively speaking, it is more suitable in some systems that require higher viscosity to maintain a specific shape or structure.

***In terms of functionality:
The functionality of PM200 is low, between about 2.6 and 2.7.
Functionality is an important indicator to measure the number of reactive groups in a molecule.
The lower functionality means that the reactivity of PM200 in chemical reactions is relatively low and the reaction speed is relatively slow.

This makes it suitable for application in some systems that do not require high reaction speed but require better fluidity.
On the contrary, Wannate PM-400 has a higher degree of function, and its higher degree of function gives it a higher reactivity, which can combine with other substances faster in the reaction to form a more complex molecular structure, thereby improving the performance of the material.

***Application system:
Due to the characteristics of low viscosity and low functionality of PM200, it is widely used in systems with high fluidity requirements, such as polyurethane rigid foam insulation materials, isocyanurate foams, coatings, adhesives, etc.
In these applications, good fluidity can ensure that the material can fill the space evenly and form a good thermal insulation, sealing or bonding effect.

Due to its high viscosity and high functionality, Wannate PM-400 is more suitable for systems with high material strength requirements.
For example, the use of Wannate PM-400 in the PIR system has improved its flame retardant and strength, which can meet some occasions where the material performance requirements are more demanding.

PHYSICAL and CHEMICAL PROPERTIES of WANNATE PM-400:
CAS Number: 9016-87-9 (Polymeric MDI)
101-68-8 (4,4'-Methylenediphenyl Diisocyanate)
26447-40-5 (MDI Mixed Isomers)
EC Number: 618-498-9 (Polymeric MDI)
202-966-0 (4,4'-MDI)
247-714-0 (MDI Mixed Isomers)
Molecular Formula: Wannate PM-400 is a polymeric mixture and therefore does not possess a single fixed molecular formula.
Representative monomer formula: C15H10N2O2
Representative polymeric structure: (C15H10N2O2)n

Molecular Weight: Since Wannate PM-400 is a mixture of oligomeric and polymeric isocyanates, no single molecular weight exists.
Monomeric MDI: 250.25 g/mol
Polymeric components: Approximately 250–1500+ g/mol depending on oligomer composition
Appearance: Dark brown liquid
Physical State: Liquid
Color: Brown to dark brown
Odor: Characteristic aromatic isocyanate odor
Density (25°C): Approximately 1.22–1.26 g/cm³

Viscosity (25°C): Typically higher than standard PMDI grades
Free NCO Content: Approximately 30–32%
Flash Point: Above 200°C
Boiling Point: Decomposes before boiling
Vapor Pressure: Very low at room temperature
Freezing Point: Depends on formulation
Solubility in Water: Reacts with water
Solubility in Organic Solvents: Soluble in many aromatic and polar organic solvents

Aromatic polyisocyanate
Contains multiple reactive isocyanate groups
High functionality
Strong crosslinking capability
Rapid reaction with polyols
Reacts with amines to form polyurea structures
Reacts with moisture to generate carbon dioxide
Moisture-sensitive material
Excellent polyurethane-forming capability
Produces highly rigid polymer networks

Good thermal stability after curing
Excellent mechanical reinforcement properties
CAS No.: 101-68-8
Boiling Point (℃): 392 ºC
Molecular Weight: 250.252
Melting Point (℃): 38-44 °C
Appearance: White to light yellow molten solid, irritating odor when heated.
Vapor Specific Gravity: 8.64
HS Code: 29291090
Flash Point (℃): 196 ºC
Solubility: Soluble in acetone, benzene, kerosene, etc
Autoignition Temperature (℃): N/A

FIRST AID MEASURES of WANNATE PM-400:
-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 WANNATE PM-400:
-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 WANNATE PM-400:
-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 WANNATE PM-400:
-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 WANNATE PM-400:
-Conditions for safe storage, including any incompatibilities:
*Storage conditions:
Tightly closed.
Dry.

STABILITY and REACTIVITY of WANNATE PM-400:
-Chemical stability:
The product is chemically stable under standard ambient conditions (room temperature).
-Possibility of hazardous reactions:
No data available