nolax is the adhesive scene’s farmteam. We sow ideas and ...
Transcript of nolax is the adhesive scene’s farmteam. We sow ideas and ...
nolax is the adhesive scene’s
farmteam. We sow ideas and
visions, let them sprout, and
nurture them to market
readiness.
Another way of thinking…
Andreas Dobmann
nolax – Sempach Station, Switzerland
PIR - a New Class of Structural Polyurea Based Adhesives
nolax.com | PIR-a New Class of Structural Polyurea Based Adhesives | October 2016 2
Topics:
‒ polyurethane and polyurea based adhesive
‒ polyisocyanurate (PIR) based polymers
‒ performance of PIR polyurea based adhesive in comparison
with polyurethane and/or polyureas
‒ how to apply a PIR polyurea based adhesive?
‒ typical end applications of PIR polyurea based adhesives
‒ summary and outlook
nolax.com | PIR-a New Class of Structural Polyurea Based Adhesives | October 2016 3
Polyurethane Based 2K Adhesive
‒ base chemicals isocyanate plus polyol
‒ ratio isocyanate: polyol typically approx. 1:1
‒ typical end use: adhesives, foams, elastic parts etc.
‒ mixing and dosing: static and dynamic mixers
nolax.com | PIR-a New Class of Structural Polyurea Based Adhesives | October 2016 4
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Relative Reaction Rates of Selected Nucleophiles
with Isocyanate
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nucleophile structure relative reaction rate
constant (non-catalyzed) @ 25°C
Primary aliphatic amine R-NH2100'000
Secondary aliphatic amine R1R2-NH 20'000–50'000
Primary aromatic amine Ar-NH2200–300
Primary alcohol R-CH2-OH 100
Water H2O100
Secondary aromatic amine R1Ar-NH 100
Secondary alcohol R1R2-CH-OH 30
Source: http://www.poliuretanos.com.br/Ingles/Chapter1/131Isocyanates.htm
Polyurea Based 2K Adhesive
‒ base chemicals isocyanate plus polyamine
‒ ratio isocyanate: polyamine approx. 1:1
‒ typical end use: coatings, adhesives not very common
‒ mixing and dosing: dedicated technology requested due to
high reaction speed
nolax.com | PIR-a New Class of Structural Polyurea Based Adhesives | October 2016 6
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Polyisocyanurate (PIR)-
Isocyanate and Polyol Based
‒ isocyanate plus polyol, ratio 2-5:1,
‒ PIR formation needs catalyst and heat
‒ high crosslinking density
‒ high temperature resistance up to 250°C (482°F)
‒ typical end use: hard insulation foams for the building industry
nolax.com | PIR-a New Class of Structural Polyurea Based Adhesives | October 2016 7
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Polyisocyanurate (PIR)-
Isocyanate and Polyamine Based
‒ isocyanate plus polyamine, ratio 2-5:1 = strong exothermic
reaction
‒ PIR formation due to exothermic reaction needs only a
catalyst
‒ combines PIR properties with polyureas reaction speed
‒ excellent mechanical properties even at elevated temperatures
‒ patented as an adhesive composition under EP 2871194 B1
nolax.com | PIR-a New Class of Structural Polyurea Based Adhesives | October 2016 8
Polyurethane, Polyurea and PIR Based Adhesive
nolax.com | PIR-a New Class of Structural Polyurea Based Adhesives | October 2016 9
Polyurethanes Polyureas PIR
crosslinking time minutes–hours seconds–
minutes
seconds–
minutes
mechanical
properties
flexible–hard flexible–hard hard
elongation at
break
>1000% >600% <100%
Polyurethane, Polyurea and PIR Based Adhesive
nolax.com | PIR-a New Class of Structural Polyurea Based Adhesives | October 2016 10
Polyurethanes Polyureas PIR
tensile strength <20 MPa <40 MPa <60 MPa
temperature
resistance
120-180°C
(248-392°F)
approx. 160°C
(320°F)
>200°C
(>392°F)
adhesion on
different
substrates1)
fulfilled fulfilled fulfilled
1) polyolefin excluded
PIR Based Polyurea Adhesives:
Tensile Strength as Function of Temperature
‒ high tensile strength but not brittle
‒ high impact resistance
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100
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300
400
500
600
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800
900
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5
10
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0 20 40 60 80 100 120 140 160 180 200
E-module(MPa)
tensile strength (MPa)
temperature (°C)
tensile strength E-Module
How to Apply a PIR Based Adhesive?
High Pressure Impingement Mixing
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Pump A Pump B
Filter Filter
Component BComponent A
Pressure: 100 – 200 bar
Injection hole: 0.1 mm
Mixing chamber diameter: 0.6 – 0.8 mm
Feed: >3 g/sec.
Source: Isotherm AG
How to Apply a PIR Based Adhesive?
High Pressure Impingement Mixing
nolax.com | PIR-a New Class of Structural Polyurea Based Adhesives | October 2016 13
Source: Isotherm AG
Processing PIR Polyurea Systems
Application Technology
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End Applications of PIR Polyurea
Based Adhesives
‒ Injection applications of adhesives
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End Applications of PIR Polyurea Based
Adhesives
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End Applications of PIR Polyurea Based
Adhesives
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‒ Applications in glazing industry
End Applications of PIR Polyurea Based
Adhesives
‒ Injection applications of adhesives
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In-situ Manufacturing of Assembly Clips
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In-situ Manufacturing of Assembly Clips
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PIR Based Adhesive at Work
https://vimeo.com/117389083
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Summary and Outlook
The combination of polyurea and PIR reactions leads to unique
adhesives with the following properties:
‒ wide adhesion spectrum to different substrates
‒ excellent shear strength at elevated temperatures
‒ high impact resistance (depending on the formulation)
‒ designed for bulk applications like adhesive injection
technology
nolax.com | PIR-a New Class of Structural Polyurea Based Adhesives | October 2016 22