The Universal Selection Source: Adhesives Ingredients

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Polycarbonate Diols (PCD) are used for a wide range of polyurethane-based adhesive & sealant formulations, 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 adhesives

Formulating the right Polyurethane adhesives or sealants that can resist to extreme environmental conditions such as high and low temperatures, humidity and chemical aggressions 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.

The outstanding durability of Polyurethane adhesives & sealants 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 adhesives, click on the pictures below:


Increased adhesion properties of PCD-based PU           Increased water resistance for durable adhesives & sealants           Enhanced chemical resistance for PU formulations

Increased thermal stability for durable PU adhesives & sealants           Improved mechanical properties for durable PU adhesives & sealants           Improved adhesion properties with diol blends

PU formulations  

Increased adhesion properties of Polyurethane adhesives

Polycarbonate Diols allow adhesive formulators to improve the adhesion properties of their Polyurethane adhesives.
A cross-cutter adhesion test was run in order to compare the adhesion properties of Diol-based Polyurethane once a part of the coating was removed (see picture 1).
Cross-cutter adhesion test
Picture1: Cross-cut adhesion test ISO 2409
Test method: part of the coating is removed
Base polyol T-peel
(KN/m, ISO11339:2010)
Eternacoll® grades 0 Bracket 0: No modification of adhesion properties
1: <5%
2: from 5% to 10%
Polyadipate of
1,6-hexane diol
2
Table 1: Modification of adhesion properties of polyol-based Polyurethane after a cross-cut adhesion test

The results in Table 1 show that compared to Polyurethanes formulated with standard diols, those formulated with Eternacoll® PCD show excellent adhesion properties after the cross-cut adhesion test.

Moreover, Figures 2 and 3 illustrate that Eternacoll® PCD provide a better T-peel and Lap-shear strength than standard diols for adhesives. This results in an improved durability of Polyurethane adhesives.

T-peel test of PCD-based PU adhesives
Figure 2: T-peel test of PCD-based Polyurethane adhesives
(kN/m, ISO 11339:2010)


Lap-shear strength of PCD-based PU adhesives
Figure 3: Lap-shear strength of PCD-based Polyurethane adhesives
(kPa, ISO 4587:2003)

PU formulations  

Excellent water resistance of Polyurethane adhesives

Polycarbonate Diols (PCD) allow formulators to provide extremely durable Polyurethane adhesives & sealants thanks to increased resistance to water / hydrolysis.

Figure 4 illustrates that Eternacoll® PCD-based Polyurethane better retains the initial Polyurethane properties in extreme humid conditions: Compared to standard Polyether Diols, it shows a very low variation of the T-peel initial value after exposure to water.

Water resistance of PCD-based PU adhesives
Figure 4: Water resistance of PCD-based Polyurethane adhesives
Water immersion at 80° C for 15 days
ISO 9142:2003 - Adhesives - Guide to the selection of standard
laboratory ageing conditions for testing bonded joints

Therefore, Polyurethane adhesives & sealants formulated with Eternacoll® withstand extreme humid conditions and remain intact after long-term exposure to water and humidity.

PU formulations  

Increased chemical resistance of Polyurethane adhesives

Exposure to harsh solvents and fluids tends to damage Polyurethane adhesives & sealants over time.

Polycarbonate Diols (PCD) can help you to overcome this annoying constraint by enhancing the chemical resistance of your Polyurethane formulations.

An ethanol resistance test was run in order to compare the chemical resistance of Diol-based Polyurethanes (see picture 2).
As illustrated on Figure 5, Polyurethane formulated with Eternacoll® PCD shows an improved resistance to harsh solvents compared to Polyurethane based on benchmark Diols.

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

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

This makes Eternacoll® PCD suitable for applications in which Polyurethane adhesives have to resist to very harsh environmental conditions

PU formulations  

High thermal stability of Polyurethane adhesives

Is temperature resistance a must-have for your Polyurethane adhesives? If you can’t afford to provide Polyurethane 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 adhesives compared to traditional Polyester and Polyether Diols, thanks to excellent heat resistance.

Figure 6 illustrates that Eternacoll® PCD based Polyurethane has a very low variation of the T-peel initial value after artificial weathering, compared to standard Polyether and Polyester Diols.

Variation of the initial value of T-peel for Diols-based PU
Figure 6: Variation of the initial value of T-peel for Diols-based PU
Test conditions: Dry heat, wet heat and cold
ISO 9142:2003 - Adhesives - Guide to the selection of
standard laboratory ageing conditions for testing bonded joints

Eternacoll® PCD based Polyurethane shows an excellent retention of initial properties, even after exposition to extreme weather conditions, for an improved durability of your adhesives & sealants!

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

PU formulations  

Improved mechanical properties of Polyurethane Adhesives

Formulating Polyurethane with Polycarbonate Diols (PCD) maximizes the performance of your adhesives & sealants formulation. How?

Polyurethane based on Eternacoll® PCD shows better mechanical properties compared to Polyurethane based on traditional Diols:
  • The Polyurethane adhesive has a better tensile strength (+329%) and is therefore less elastic (Figure 7)
  • It also shows a better hardness (+173%), as illustrated on Figure 8

Tensile strength of Diol-based PU Hardness of Diol-based PU
Figure 7: Tensile strength of Diol-based PU Figure 8: Hardness of Diol-based PU

The improvement of mechanical properties allows you to provide less elastic Polyurethane and with a better hardness, for a highly durable adhesive!

PU formulations  

Improvement of adhesion performance thanks to diol blends

Last but not least, you can cost effectively improve the adhesion properties of your Polyurethane adhesives using blends of Eternacoll® PCD / standard diols.

Eternacoll® PCD are fully miscible with most of standard diols.

As illustrated on Figures 9 and 10, you can easily adjust your formulation according to the cost / adhesion performance you want to get with standard diols content about 10-50% wt. The adhesion improvement can be strongly enhanced compared to standard diol.

T-peel of PU adhesives using polycarbonate diols blends
Figure 9: T-peel of PU adhesives using polycarbonate diols blends
Test method: ISO 11339 :2010
25% wt = 25% of Eternacoll® PCD, 75% of benchmark diol (PTMG)
50% wt= 50% of Eternacoll® PCD, 50% of benchmark diol (PTMG)
100% wt= Benchmark PTMG without Eternacoll® PCD


Lap-shear strength of PU adhesives using polycarbonate diols blends
Figure 10: Lap-shear strength of PU adhesives using polycarbonate diols blends
Test method: ISO 4587:2003

Discover more about UBE Polycarbonate Diols
21

Product Selection

Product Selection
Description
Docs & Support
When it comes to industrial protection footwear, you have to make sure that you use the best Polyurethane adhesives that can resist to severe chemical attack and extreme conditions. Check this case study to learn more.
Do you want to improve PU foowtear adhesives? Eternacoll® Polycarbonate Diols bring extreme durability to waterborne and solvent-based PU adhesives.
Meet all the Industrial assembly adhesives requirements! Polycarbonate Diols deliver excellent adhesives strength to substrates and best-in-class durability.
Willing to improve the durability of your Polyurethane sealants for B&C? Polycarbonate diols enhance damping properties and improve degradation resistance of PU.
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 hardness, high thermal stability as well as high mechanical properties.
Solvent-free cyclic aliphatic copolycarbonate diol. Is recommended for those applications when high performance and durability to the final adhesive is needed in the terms of weather ability and heat as well as hydrolytic resistance.
Solvent-free cyclic aliphatic copolycarbonate diol. Recommended for those applications when high performance and durability to the final adhesive is needed in the terms of weather ability and heat as well as hydrolytic resistance.
Solvent-free liquid aliphatic polycarbonate diol. Is recommended for those applications when high performance and durability to the final adhesive is needed in the terms of weather ability and heat as well as hydrolytic resistance.
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 flexibility, 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.
Solvent-free solid aliphatic polycarbonate diol. Is recommended for those applications when high performance and durability to the final adhesive is needed in the terms of weather ability and heat as well as hydrolytic resistance.
Solvent-free solid aliphatic polycarbonate diol. Provides good T-peel resistance and similar lap-shear strength than standard polyols by replacing the blend of a classical polyol by this polycarbonate diol.
Solvent-free solid aliphatic polycarbonate diol. It is an excellent polyol for adhesives in terms of ageing and contributes to show better chemical resistance than countertypes based on standard polyols.
Solvent-free liquid copolycarbonate diol. Is an excellent polyol for adhesives in terms of ageing and contributes to show better chemical resistance than countertypes based on standard polyols.
Solvent-free liquid copolycarbonate diol. Provides good T-peel resistance and similar lap-shear strength than standard polyols by replacing the blend of a classical polyol by this polycarbonate diol.
Solvent-free liquid copolycarbonate diol. Provides high flexibility, optimum performance at low temperature, high thermal stability as well as high mechanical properties.
Solvent-free linear aliphatic polycarbonate diol. Provides good T-peel resistance and similar lap-shear strength than standard polyols by replacing the blend of a classical polyol by this polycarbonate diol.
Solvent-free liquid copolycarbonate diol. Provides good T-peel resistance. PU produced from this grade is superior to the one based on polyether diol as well as polyester diol.
Get all the answers to frequently asked questions about Polycarbonate Diols: Technical Performance, Formulation and Product Selection.
Do you want to improve the durability of your polyurethane based adhesives, even in extreme conditions? UBE Eternacoll® is a large platform of polycarbonate polyols used in the formulation of superior durable polyurethane-based adhesives.
Have you ever dreamt of formulating best in class durable PU Sealants that would resist to harsh conditions? Ideal for Sealants, UBE Eternacoll® Polycarbonate Diol provides an outstanding durability thanks to the excellent retention of initial PU properties, even under extreme conditions.
21 items matching your search
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Case Studies from Polycarbonate Diols for durable PU

Hot melt automotive adhesives: reliable adhesion and durability

The automotive industry is confronted with increasing complexity and pressure to innovate, with shorter technology cycles. Additionally, regulatory requirements are getting stricter and stricter in terms of safety and reliability. In this context, manufacturers and suppliers are to provide the most reliable products. And PU adhesives play an important part.
Polyurethane adhesives are broadly used in the automotive industry. So how can we make sure to provide the most durable Polyurethane Adhesives in harsh conditions?
UBE ETERNACOLL® Polycarbonate Diols significantly improve the performance of Polyurethane adhesives. Indeed, they bring improved durability, excellent adhesion in demanding conditions, and short curing time for long lasting and high performance PU adhesives.

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Boost the adhesion and durability of Polyurethane adhesives for Industrial assembly

Industrial assembly adhesives carry a lot of challenges. More efficient than traditional diols, Eternacoll® PCD leverage the benefits of Polyurethane adhesives and deliver excellent adhesives strength to metal & plastics substrates, as well as best-in-class durability thanks to enhanced resistance to high temperatures and hydrolysis.

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Improve the durability of your Polyurethane Adhesives in harsh conditions

UBE Eternacoll® is a large platform of polycarbonate polyols used in the formulation of polyurethane-based adhesives. These products offer customizable possibilities providing superior and long-term retention of designed performances, without modification of initial properties after being exposed in harsh environments.

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Maximize the durability of your Polyurethane Sealants in harsh conditions

Ideal for Sealants, UBE Eternacoll® Polycarbonate Diol enables to easily meet specifications and boost the resistance of Polyurethane to mechanical aggressions such as abrasion, leading to cracks. It also provides an outstanding durability thanks to the excellent retention of initial properties, even under extreme conditions.

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Footwear adhesives: Take your Polyurethane formulation to the next level

Polyurethane adhesives are broadly used for attaching the upper to the shoe sole. But how can you make sure that your PU water-based adhesives achieve good bond strengths? And how can you improve your current solvent-based systems too? 

Eternacoll® Polycarbonate Diols significantly improve the performance of waterborne and solvent-based PU adhesives. They bring improved durability, excellent adhesion to a variety of substrates, and an increased resistance to hydrolysis for long lasting and high performance PU Footwear adhesives.

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Downloads from Polycarbonate Diols for durable PU

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