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Polycarbonate Diols (PCD) are used for a wide range of Polyurethane Coatings, providing an extreme durability and a high performance to the final polymer. These products offer customizable possibilities for superior & long-term retention of designed performances.

Formulate extremely durable Polyurethane Coatings

Formulating the right Polyurethane coatings that can resist to extreme environmental conditions while ensuring durable high performance is a challenge.

Polycarbonate Diols (PCD) offer customizable possibilities with superior and long-term retention of designed performances, without modification of initial properties after being exposed in harsh environments.

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The outstanding durability of Polyurethane coatings based on PCD is obtained thanks to different performances, such as:
Access more information about the best-in-class performances of Polycarbonate Diol-based Polyurethane coatings, click on the pictures below:

Excellent water resistance           Increased chemical and stain resistance           High thermal stability / lower yellowish

Improved mechanical properties for durable PU coatings           Better retention of gloss           Very good scratch & abrasion resistance

PU formulations  

Excellent water resistance of Polyurethane Coatings

Polycarbonate Diols (PCD) provide increased water and hydrolysis resistance to Polyurethane Coatings.

Figure 1 shows that water absorption is less important (-52%) for PCD based Polyurethane Coatings.
This leads to minor weight increment and better resistance to hydrolysis than PU based on benchmark Diols.

Water absorption of Diol-based PU
Figure 1: Water absorption of Diol-based Polyurethane Coatings



Therefore, PU coatings formulated with Eternacoll® withstand extreme humid conditions. They remain intact after long-term exposure to water and humidity.

PU formulations  

Increased chemical & stain resistance of Polyurethane Coatings

Exposure to harsh solvents and fluids tends to damage Polyurethane coatings over time, causing them to fade, discolor and get stained.

Polycarbonate Diols (PCD) can help you to overcome this annoying constraint. They enhance the chemical and stain resistance of your PU formulations.

ArrowChemical resistance

An ethanol resistance test was run in order to compare the chemical resistance of Diol-based Polyurethanes (see picture 1).

As illustrated on Figure 2, PU formulated with Eternacoll® PCD shows an improved resistance to harsh solvents compared to PU based on benchmark Diols.

Ethanol resistance test of PCD-based Polyurethane
Picture 1: Ethanol resistance test of
PCD-based Polyurethane Coatings
ISO 2812-1:2007 - Paints and varnishes
Determination of resistance to liquids
Part 1: Immersion in liquids other than water
Ethanol resistance of Diol-based PU
Figure 2: Ethanol resistance of Diol-based PU
*5 = Intact coating after exposure
4 = Slight change in gloss or color
3 = Light mark
2 = Strong mark
1 = Coating removal


The use of Eternacoll® PCD in your PU formulations allows you to provide highly durable Polyurethane coatings that can better resist to exposure of chemicals.

This makes Eternacoll® PCD suitable for applications in which Polyurethane coatings have to resist to very harsh environmental conditions, such as oil & mining pipes coatings.

ArrowStain resistance

Last but not least, Polycarbonate Diols also give an outstanding stain resistance to Polyurethane coating, as illustrated on the pictures below:

Stain resistance of Eternacoll® UH100-based PUD
Eternacoll® UH100
based PUD
Stain resistance of PU coating Stain resistance of PPG-based PUD
PPG-based PUD
Picture 2: Stain resistance of Diol-based Polyurethane Coatings



PU formulations  

Higher thermal stability of Polyurethane coatings

Is temperature resistance a must-have for your Polyurethane coatings? If you can't afford to provide PU that tends to yellowish over time, then PCD is the technology you have always been looking for!

Polycarbonate Diols provide a very high thermal stability to Polyurethane Coatings compared to traditional Polyester and Polyether Diols, thanks to excellent heat resistance.

Figure 3 illustrates that Eternacoll® PCD has a very low increment of yellowness index after artificial weathering compared to standard Polyether and Polyester Diols.

Increment of yellowness index of Diols-based PU
Figure 3: Increment of yellowness index of Diols-based PU
ISO 3248:1998 - Measurements after 15 days at 120° C


Figure 4 and Picture 3 illustrate the excellent retention of initial PU properties of Eternacoll® PCD based PU after heat ageing, for an improved durability of your coatings!

Retention* of hardness Persoz
Figure 4: Retention* of hardness Persoz
ISO 1522:2007 - Paints and varnishes - Pendulum damping test
*Retention = (property after ageing)/(initial property) x 100



Eternacoll® UH100 based PUD after heat exposition
Eternacoll® UH100
based PUD
PPG based PUD after heat exposition
PPG-based PUD
Polyadipate of 1,6-hexanediol based PUD after heat exposition
Polyadipate of 1,6-hexanediol
based PUD
Picture 3: Pictures of Diol-based Polyurethane Coatings after heat exposition



Therefore, Eternacoll® PCD allow to provide highly durable Polyurethane Coatings that resist to heat and can be used for applications exposed to high temperatures.

PU formulations  

Improved mechanical properties of Polyurethane Coatings

Formulating with Polycarbonate Diols (PCD) enables to maximize the mechanical properties of Polyurethane Coatings Formulation. How?

PU based on Eternacoll® PCD shows better mechanical properties compared to PU based on traditional Diols:
  • The PU coating has a better tensile strength (+329%) and is therefore less elastic (Figure 5)
  • It also shows a better hardness (+173%), as illustrated on Figure 6

Tensile strength of Diol-based PU
Figure 5: Tensile strength of Diol-based PU
Hardness of Diol-based PU
Figure 6: Hardness of Diol-based PU

The improvement of mechanical properties yields to less elastic and harder Polyurethane, for a highly durable coating!

PU formulations  

Better gloss retention of Polyurethane coatings based on Polycarbonate Diols

Polycarbonate Diols provide a superior and long-term retention of coating gloss, without modification of initial properties after being exposed to harsh environments.

The graphs below illustrate the excellent retention of initial Polyurethane coatings' gloss thanks to Eternacoll® Polycarbonate Diols. They are compared to standard Diols, after ageing at different heat conditions:

Retention of gloss for Diols-based PU
Figure 7: Retention of gloss 60° for Diols-based PU
ISO 3248:1998 - Measurements after 15 days at 120° C
*Retention = (property after ageing)/(initial property) x 100


Eternacoll® PCD show a better retention of gloss and thus improve the overall durability formulation compared to standard Polyester and Polyether Diols!

PU formulations  

Increased scratch & abrasion resistance of Polyurethane coatings

Polyurethane coatings formulated with Polycarbonate Diols show increased abrasion and scratch resistance, and are therefore more durable than Polyurethane coatings formulated with standard Diols.

ArrowAbrasion resistance

Figure 8 shows that PU based on Eternacoll® Polycarbonate Diols loses less volume when exposed to harsh conditions than PU based on traditional Diols. Therefore, it brings a better resistance to abrasion:

Volume loss of coating of Diol-based PU when exposed to harsh conditions
Figure 8: Abrasion resistance (Volume Loss of Coating) of
Diol-based PU when exposed to harsh conditions

ArrowScratch resistance

Scratch resistance of PCD-based PU has been tested thanks to the determination of film hardness with pencil test.
Figure 9 illustrates that Eternacoll® PCD-based Polyurethane coatings have a higher hardness and therefore an increased scratch resistance than benchmark Diols.

Determination of film hardness with Pencil test
Figure 9: Conditions of Pencil test - Determination of film hardness
ISO 15184:1998 - Paints and varnishes


The use of Polycarbonate Diols such as Eternacoll® in PU formulations allows to develop extremely durable PU coatings that can resist to intense environmental conditions.

Bring extreme durability to your PU formulations
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Product Selection

Product Selection
Description
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ETERNACOLL® UD100 by UBE is a linear aliphatic unsaturated polycarbonate diol. It is solvent-free and recommended for UV-curing applications.
Struggling to develop resistant Polyurethane wood coatings? Polycarbonate Diols bring excellent durability and weatherability to PU wood coatings.
Solvent-free linear aliphatic polycarbonate diol. Polyurethanes produced from this grade are superior to those based on polyether diol as well as polyester diol and provides high thermal stability, optimum performance at low temperature, high flexibility, high chemical resistance as well as high mechanical properties.
Solvent-free cyclic aliphatic copolycarbonate diol. Polyurethanes produced from this grade are superior to those based on polyether diol as well as polyester diol and provides high thermal stability, hardness, high chemical resistance as well as high mechanical properties.
Solvent-free cyclic aliphatic copolycarbonate diol. Polyurethanes produced from this grade are superior to those based on polyether diol as well as polyester diol and provides high thermal stability, hardness, high chemical resistance as well as high mechanical properties.
Solvent-free cyclic aliphatic copolycarbonate diol. Polyurethanes produced from this grade are superior to those based on polyether diol as well as polyester diol and provides high thermal stability, hardness, high chemical resistance as well as high mechanical properties.
Solvent-free liquid aliphatic polycarbonate diol. Polyurethanes produced from this grade are superior to those based on polyether diol as well as polyester diol and provides high thermal stability, flexibility, high chemical resistance as well as high mechanical properties.
Solvent-free liquid aliphatic polycarbonate diol. Polyurethanes produced from this grade are superior to those based on polyether diol as well as polyester diol and provides high thermal stability, flexibility, high chemical resistance as well as high mechanical properties.
Solvent-free solid aliphatic polycarbonate diol. Polyurethanes produced from this grade are superior to those based on polyether diol as well as polyester diol and provides high chemical resistance, excellent hydrolytic stability, high thermal stability as well as high mechanical properties.
Solvent-free solid aliphatic polycarbonate diol. Polyurethanes produced from this grade are superior to those based on polyether diol as well as polyester diol and provides high chemical resistance, excellent hydrolytic stability, high thermal stability as well as high mechanical properties.
Solvent-free solid aliphatic polycarbonate diol. Polyurethanes produced from this grade are superior to those based on polyether diol as well as polyester diol and provides high chemical resistance, excellent hydrolytic stability, high thermal stability as well as high mechanical properties.
olvent-free solid aliphatic polycarbonate diol. Polyurethanes produced from this grade are superior to those based on polyether diol as well as polyester diol and provides high chemical resistance, excellent hydrolytic stability, high thermal stability as well as high mechanical properties.
Solvent-free liquid copolycarbonate diol. Polyurethanes produced from this grade are superior to those based on polyether diol as well as polyester diol and provides flexibility, softness, high chemical resistance as well as high mechanical properties.
Solvent-free liquid copolycarbonate diol. Polyurethanes produced from this grade are superior to those based on polyether diol as well as polyester diol and provides flexibility, softness, high chemical resistance as well as high mechanical properties.
Solvent-free liquid copolycarbonate diol. Polyurethanes produced from this grade are superior to those based on polyether diol as well as polyester diol and provides flexibility, softness, high chemical resistance as well as high mechanical properties.
Solvent-free liquid copolycarbonate diol. Polyurethanes produced from this grade are superior to those based on polyether diol as well as polyester diol and provides flexibility, softness, high chemical resistance as well as high mechanical properties.
Get all the answers to frequently asked questions about Polycarbonate Diols: Technical Performance, Formulation and Product Selection.
Struggling to balance flexibility and durability for PU Leather Coatings? Eternacoll® Polycarbonate Diols provide both desired touch feeling and durability.
Struggling to formulate high clarity and durable Polyurethane? UBE Eternacoll® Polycarbonate is the solution you need to formulate highly transparent and extremely durable PU glass coatings.
Polycarbonate Diols (PCD) are used for a wide range of polyurethane-based coating formulations, providing an extreme durability and a high performance to the final polymer. Download the webinar presentation to learn more!
Develop superior durable PU for Pavement Coatings! UBE Eternacoll Polycarbonate Diol (PCD) helps to provide an improved durability thanks to improved mechanical properties, better resistance to extreme temperatures and excellent vehicle fluids resistance.
Struggling to formulate exterior coatings for oil & mining pipe that can resist to very harsh environmental conditions? UBE PCD provides an improved durability to PU based exterior pipe coatings thanks to increased chemical and mechanical resistance, and enables to reduce overall maintenance costs.
Improve performance of coatings obtained from Waterborne Polyurethane Dispersions! Use polyols mixtures.
Are you struggling to formulate exterior coatings for oil & mining pipes that can resist to harsh environments? Learn more about PU coatings obtained with PCD!
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Case Studies from Polycarbonate Diols for durable PU Center

Formulate extremely durable PU for oil & mining pipes exterior coatings

UBE Eternacoll® Polycarbonate Polyol is the ideal raw material for formulation of Polyurethane-based exterior pipe coatings. Why? Because it helps to provide an improved durability to PU thanks to increased chemical and mechanical resistance.

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Maximize the durability of your Polyurethane Pavements in extreme conditions

UBE Eternacoll® Polycarbonate Diol is the ideal raw material for formulation of Polyurethane-based pavements. Why? Because it helps to provide an improved durability to PU thanks to improved mechanical properties, better resistance to extreme temperatures and excellent vehicle fluids resistance.

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Upgrade the durability of transparent PU glass coatings

As a formulator of transparent PU based coatings, it is critical for you to formulate high clarity and durable Polyurethane. Fortunately for you, UBE has developed Eternacoll® Polycarbonate Diol, the solution you need to formulate highly transparent and extremely durable PU glass coatings!

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Bring unique balance between flexibility and durability to PU Leather Coatings and Artificial Leather

As a formulator of Polyurethane Coatings for Leather applications, you are sick of trying to formulate Polyurethane coatings that are flexible enough to avoid cracks, without significantly reducing their long-lastingness.
Formulators of PU Leather Finishing and Artificial Leather Coatings greatly appreciate Eternacoll® Polycarbonate Diols for the excellent balance they provide among your desired touch feeling, flexibility and durability.
Plus, in addition to bringing flexible and long-lasting PU formulations, UBE Eternacoll® also outperform other Diols in terms of adhesion to substrates.

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Leverage the durability and weatherability of Polyurethane Wood Coatings

Polyurethane wood coatings are frequently exposed to harsh environments such as heat, UV, stains, scratch and abrasion.
For this, they have to be highly resistant to heat, UV, hydrolysis, chemicals, stains, exposure to scratch & abrasion or solvents. However, it is not easy to develop a durable Polyurethane wood coating without having to compromise on flexibility.
To cope with this, UBE has developed Eternacoll® Polycarbonate Diols, specific raw materials for Polyurethane that bring best-in-class durability, excellent weatherability and tunable balance between hardness and softness to wood coatings.

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Downloads from Polycarbonate Diols for durable PU Center

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Webinars & Videos

Check out our webinars and videos about Polycarbonate Diols for durable PU

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