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Technical Information leather (synthetic leather, artificial leather, etc.)

Use in leather applications Use of DURANOL™ allows you to obtain a polyurethane resin with excellent hydrolysis resistance, moisture heat resistance, chemical resistance, and Abrasion resistance, as well as to improve the durability of polyurethane resins for leather, such as a binder of synthetic leather/artificial leather and surface treatment agents for various leathers. DURANOL™ is used in a wide range of fields such as automobile, furniture, shoes, clothing, and groceries.

Hydrolysis resistance of DURANOL™

It can be seen that PCD polyurethanes are hard to decompose when compared to polyether urethanes and polyester urethanes.

Change in the molecular weight of a polyurethane film immersed in hot water at a temperature of 100°C
Change in the molecular weight of a polyurethane film immersed in hot water at a temperature of 100°C
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[Polyurethane formulation] MDI/Polyol/1,4-BDO=2/1/1

Heat resistance of DURANOL™

PCD polyurethanes show high strength retention even after storage at a high temperature.

Change in the property of a polyurethane film stored at 120°C
Change in the property of a polyurethane film stored at 120°C
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[Polyurethane formulation] H12MDI/Polyol/IPDA=2/1/1

Chemical resistance of DURANOL™

It can be seen that PCD polyurethanes have a smaller swelling rate due to organic solvent when compared to polyether urethanes and polyester urethanes and copolymerized type DURANOL™ has an excellent swelling rate in particular.

Change in the property of a polyurethane film immersed in oleic acid (23°C) for 1 week
Change in the property of a polyurethane film immersed in oleic acid (23°C) for 1 week
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[Polyurethane formulation] MDI/Polyol/1,4-BDO=2/1/1

Flexibility of DURANOL™

Generally, although PCD polyurethane tends to lack flexibility, use of liquid type DURANOL™ allows improvement of flexibility.

Tensile test of polyurethane
Tensile test of polyurethane
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[Measurement condition]
Polyurethane formulation: MDI / Polyol / 1, 4 - BDO = 2 / 1 / 1
Condition: According to JIS K7311
Test piece: 2 mm × 60 mm strip
Measuring instrument: TENSILON tensile testing machine

Abrasion resistance of two-component polyurethane paint using DURANOL™

PCD two-component polyurethane paint offers excellentAbrasion resistance of the paint film.
PCD two-component polyurethane paint offers excellent Abrasion resistance of the paint film.
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[Measurement condition]
Coating formulation : Polyol/DURANATE™[TPA-100]/Solvent/DBTDL
Cured at 80°C×2hr
Taber abrasion test : 500g, 500 times grinding

Compatibility of DURANOL™ and other polyols

Generally, DURANOL™ has a good compatibility with polyester polyols.
In the case of acrylic polyols, the compatibility depends on their types.

Polyol PCD Polyol:PCD
9 : 1 7 : 3 5 : 5 3 : 7 1 : 9
Polybutylene adipate
(Polyester polyol)
T5650J good good good good good
T5652 good good good good good
G4672 good good good good good
G3452 good good good good good
T4692 good good good good good
Acrylic polyol T5650J good good goodfair fair fair
T5652 fair poor poor poor fairpoor
G4672 fair poor poor poor fairpoor
Polytetramethylene glycol
(Polyether polyol)
T5650J goodfair poor poor poor good
T5652 poor poor poor poor fair
G4672 fairpoor poor poor poor fair
[Judgment] good: Transparent, fair: Uniform but with turbidity, poor: Separation (Temperature: 60±3°C)


Compatibility of DURANOL™ and solvents

Liquid type DURANOL™ (T5652•G4672 and G3452) offers excellent handling property and solvent solubility.

  Liquid Solid
solvent/grade T5652 G4672 G3452 T6002 T4692
Toluen 85 85 80 30 8
DMF 85 85 80 20 20
Ethyl acetate 80 80 80 30 10
Acetone 80 80 75 30 20
MEK 90 85 75 40 10
N-octane <1 <1 <1 <1 <1
Methanol <1 <1 <1 <1 <1
Iso-propanol <1 <1 <1 <1 <1

旭化成 アルミペーストAsahi KASEI DURANATE™Asahi KASEI SB latex

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