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Durable Polyurethane adhesives

ETERNACOLL® polycarbonate diols (PCD) and ETERNATHANE® polycarbonate-based polyurethane prepolymers 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.

Polycarbonate Diols and Polycarbonate-based Prepolymers

Formulate extremely durable Polyurethane adhesives

Polyurethane adhesives with extreme durability

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) and Polycarbonate-based Polyurethane Prepolymers 
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 adhesives & sealants based on PCD or Polycarbonate-based Polyurethane Prepolymers
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 and Polycarbonate-based Polyurethane Prepolymers 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® or Eternathane®
Polycarbonate-based Polyurethane Prepolymers show excellent adhesion properties after the cross-cut adhesion test.

Moreover, Figures 2 and 3 illustrate that Eternacoll® or Eternathane® 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) and Polycarbonate-based Polyurethane Prepolymer allow formulators to provide extremely durable Polyurethane adhesives & sealants thanks to increased resistance to water / hydrolysis.

Figure 4 illustrates that  Polyurethane based on Eternacoll® or Eternathane® 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® or Eternathane® 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) and Polycarbonate-based Polyurethane Prepolymers 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® or Eternathane® 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® or Eternathane® in your Polyurethane formulations allows you to provide highly durable Polyurethane adhesives that can better resist to exposure of chemicals.

This makes Eternacoll® or Eternathane® 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 Polycarbonate Diols (PCD) and Polycarbonate-based Polyurethane Prepolymers 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 Polyurethane based on Eternacoll® polycarbonate diols or Eternathane® polycarbonate-based polyurethane prepolymers 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® or Eternathane® 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® or Eternathane® 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 or polycarbonate-based polyurethane prepolymers maximize the performance of your adhesives & sealants formulation. How?

Polyurethane based on Eternacoll® or Eternathane® 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
Figure 7: Tensile strength of Diol-based PU
Hardness 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® or Eternathane® / standard diols.

Eternacoll® or Eternathane® 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

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Product Datasheets

ETERNATHANE®

ETERNATHANE® by UBE is a series of polycarbonate-based and isocyanate-terminated urethane prepolymer with customizable polycarbonate and isocyanate composition, for polyurethane applications requesting high performance and maximized durability in harsh conditions overtime. This prepolymer series can...

ETERNACOLL® PH200D

ETERNACOLL® PH200D by UBE is a 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. Polyurethanes produced from this grade are superior to those based on...

ETERNACOLL® UT200

ETERNACOLL® UT200 by UBE is a 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. Polyurethanes produced from this grade are superior to those b...

ETERNACOLL® PH50

ETERNACOLL® PH50 by UBE is a 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. Polyurethanes produced from this grade are superior to those based on p...

ETERNACOLL® PH100

ETERNACOLL® PH100 by UBE is a 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. Polyurethanes produced from this grade are superior to those based on ...

ETERNACOLL® PH300D

ETERNACOLL® PH300D by UBE is a 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. Polyurethanes produced from this grade are superior to those based on...

ETERNACOLL® UH50

ETERNACOLL® UH50 by UBE is a 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. Polyurethanes produced from this grade are superior to those bas...

ETERNACOLL® UH200

ETERNACOLL® UH200 by UBE is a 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. Polyurethanes produced from this grade are superior to those ba...

ETERNACOLL® UH100

ETERNACOLL® UH100 by UBE is a 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. Polyurethanes produced from this grade are superior to those b...

ETERNACOLL® UHC50-100

ETERNACOLL® UHC50-100 by UBE is a solvent-free liquid 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. Polyurethanes produced from this grade are superior to tho...

ETERNACOLL® UH300

ETERNACOLL® UH300 by UBE is a 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. Polyurethanes produced from this grade are superior to those ba...

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