Mitsubishi Chemical Corporation has developed BioPTMG, an environmentally friendly polyol that is manufactured from bio feedstocks.
BioPTMG has the same performance as petroleum-derived PTMG as a raw material for polyurethane resins and polyester resins, and has excellent impact resilience, wear resistance, hydrolysis resistance, flexibility at low temperatures, etc.
Taking advantage of its characteristics, it can be used in a wide range of fields from interior and fashion to industrial materials.
In case you are interested in our BioPTMG we are ready to send you samples for your own evaluation.

  • Grades:
  • CAS No.:
  • Japan, Chemical Substances Control Law:
  • Japan, Poisonous and Deleterious Substances Control Law:
    Not applicable.
  • Japan, Fire Services Law:
    Hazardous Material Class 4 Petroleums No.4 Hazardous Rank III(BioPTMG650)
    Combustible Materials, Flammable Solids(BioPTMG1000, 2000, 3000)




Grade BioPTMG650 BioPTMG1000 BioPTMG2000 BioPTMG3000
Appearance Colorless transparent liquid

Solid white wax

Colorless transparent liquid when melted
Solid white wax

Colorless transparent liquid when melted
Solid white wax

Colorless transparent liquid when melted
Solid white wax

Colorless transparent liquid when melted
Odor Odorless Odorless Odorless Odorless
Avg. Molecular Wt. 650 1000 2000 2900
Freezing point*(℃) 11 17 20 21
Flash point(℃) 237 247 240 246
Specific gravity(40/4℃) 0.982 0.979 0.976 0.974
160(40℃) 320(40℃) 1400(40℃) 3450(40℃)
Specific heat(kJ/kg・K) 2.0(40℃) 2.0(40℃)

*:Measured value in conference with JIS K0065.3(visual)



BioPTMG shows the following outstanding characteristics as a soft segment of polyurethane and polyester resins. The resins obtained are used over a broad range of applications, from common consumer goods such as garments, to the industrial materials such as machine parts.
Applications are expected to continue to grow.

  • Impact resilience
  • Hydrolysis resistances
  • Low temperature flexibility
  • Wear resistance
  • Tear resistance
  • Fungus resistance

Main Applications

Polyurethane Application

  • Polyurethane elastomers
    Thermoset elastomers (TSU)
    Thermoplastic elastomers (TPU)
  • Paints and coatings
  • Polyurethane elastic fibers (Spandex)
  • Adhesives and sealants
  • Artificial suede and synthetic leather

Storage and Handling


BioPTMG is hygroscopic and will degrade if exposed to oxygen or air, so it should be well-sealed with dry nitrogen.
BioPTMG is a white, waxy sold at room temperature, but will become a clear, colorless liquid upon heating.  If it has solidified in the drum, it can be melted by holding the drum at about 70℃ for 24 hours.  Avoid localized heating however.  For storage in the liquid state, it is recommended to maintain temperature at less than 50℃.
BioPTMG650 is classified under the Japanese Fire Services Act as hazardous materials, Class 4, Petroleums No.4, Hazardous Rank III.  Volatility is low, and it is unlikely to catch fire at room temperature.  But if it is burning, extinguish the fire with dry chemical, alcohol-resistant foam, or large quantities of water.  Although BioPTMG has relatively low toxicity and is relatively safe, use standard protective equipment such as goggles and gloves when handling it.

Lineup / Specifications


Product Specifications

Molecular Weight Hydroxyl value
Acid number
Moisture% Volatiles% Hue
BioPTMG650 650±50 160~187 <0.05 <0.03 <0.1 <50
BioPTMG1000 1000±50 107~118 <0.05 <0.03 <0.1 <50
BioPTMG2000 2000±100 53~59 <0.05 <0.03 <0.1 <50
BioPTMG3000 3000±200 35~40 <0.05 <0.03 <0.1 <50

Available Quantities

Drum 180kg,200kg(depending on grade)
Oilcan 15kg



Inquiries Concerning Products

Mitsubishi Chemical Corporation
C4 & PBT Dept.

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