pur-temadag, 30. maj - erik larsen (bayer materialscience)
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PUR-temadag, 30. maj - Erik Larsen (Bayer MaterialScience)TRANSCRIPT
30.05.2013/Erik Larsen/R&D Manager
Polyurethane Insulates Better:
Introduction to Polyurethaneand Technical Insulation.
“Polyol” + “isocyanate” ���� “urethane” + heat(liquid) (liquid) (solid)
What are Polyurethanes (PUR)?
Polyol Isocyanate
Urethane
Poly urethane network / matrix
Basic PUR -reactions.
Additive Example PurposePolyols Polyethers, polyesters, polyamines - modify/determine physical/chemical
properties.
Catalysts Tertiary aminesOrganic metals
- increase speed of reactions.- dominate special reactions.
Blowing agents CBA: Water (CO2), Formic acid (CO)FBA: CFC, HCFC, HFC, HC, FC
- foamed structure.- improve the insulation properties.
Cell stabilizers Special siloxanes/ silicone oils - emulgate.- nucleate.- stabilize.
Crosslinkers &chainextenders
Glycerol, polyols, polyamines - increase hardness.- increase flexibility.
Colours Pigments, carbon black - dye the polyurethane.
Fillers Fibre, inorganic materials - modify properties (stiffness, fire perfor-mance, price, reduce shrinkage).
Flameretardants
Phosphoric- and/or halogen basedadditives.
- Improving fire performance.
Common additives in PUR -systems*.
*mainly in the polyol-blend
“The four corners of Polyurethanes”.
Flexible/rigid foamed/solid thermosets.
“Polyol” + “isocyanate” ���� “urethane”
What are Polyurethanes (PUR)?
“Polyol” + “isocyanate” ���� “urethane”
What are Polyurethanes (PUR)?
“Polyol” + “isocyanate” ���� “urethane”
What are Polyurethanes (PUR)?
λλλλfoam = λλλλgas + λλλλmatrix + λλλλradiation
Foam Insulation Performance
0%
25%
50%
75%
100%
Cell Gas
PUR Matrix
Radiation
Factors Contributing to Foam Thermal Conductivity (λ λ λ λ = ability to conduct heat)
Blowing Agent Technologies for Polyurethane
Chemical Class ODP [R11=1]
GWP [100yrs, CO2=1]
λλλλgas[mW/m*K]
CFCs (1. generation) R-11 1 4750 7,8
H-CFCs (2. generation) R-141b 0,1 725 9,8
HFCs (3. generation) 245fa 0 1030 12,1
365mfc 0 900 10,6
Hydrocarbons Cyclopentane 0 11 12,6
Isopentane 0 11 14,8
HFOs (4. generation) Solstice LBA 0 <5 na
FEA 1100 0 10 10,7
Others Water (CO2) 0 1 16
Air 0 0 27
Fresh PUR-foam15
20
25
30
CFC11
HCFC141b
HFC245
HFC365
HFO CP Water(CO2)
1719 20 21
1921
2319
21 22 2321
23
27
Blowing agent -> “green” direction
Lambda values, PUR foam with steel facings [mW /mK].
Fresh PUR-foamAged PUR-foam
Insulation properties of PUR foam with different blowing agents.
Thickness of insulation in order to achieve same U-factor*:
Why PUR Materials for the Construction Industry?
There is only one clever way to build a passive house
150 m2 house with 400 [mm] MW gives approx. 7 m2
extra living room using 270 [mm] PUR!
[W/m²K]
*U-factor: ability of a building element to conduct heat
Thickness
Lambda, foam
Why PUR as technical insulation?
�Insulates better.
�Good mechanical properties.
�Sustainable.
�Durable.
�Resistant to chemicals.
�Resistant to fungis, bacterias and moulds.
�Temperature stable.
�”No” water uptake.
�Easy to form and work in.
”FunctionalInsulation”
Technical insulation: industrial pipes.
Technical insulation: district heating pipes.
Technical insulation: commercial refrigerators/freezers.
Technical insulation: spray.
Technical insulation: sandwich panels.
Technical insulation: sandwich panels.
PUR Boards for Thermal Insulation
Renovation
PUR Elements for Thermal Insulation
New Roof and Wall Insulation
Concrete sandwich walls, 300 [mm] PIR, U-value 0,08 [W/m 2K]
PUR Rigid Foam Cores/Integral skin
Window frames
Sustainable PUR foams – long term project.
0
5
10
15
20
25
Conventional Foam
Microcellular Systems + low
k-factor BA
Advanced Ins. Technology
The
rmal
Con
duct
ivity
[mW
/m*K
]
Project Portfolio Energy Saving PUR Solutions
The Knudsen-Effect
100101 1000 / 1 10 100 1000
[µm][nm]
0
5
10
15
20
25
30
35
40
0 0 0 1 10 100 1000
k-fa
ctor
[m
W/K
/m]
cell size [mm]0.001 0.01 0.1 1 10 100 1000
cell size [µm]
N2
CO2
Advanced Insulation Technologies
”Nano foams”
Project Status
Thank you!
Forward-Looking Statements
This presentation may contain forward-looking statements based on current assumptions and forecasts made by Bayer Group or subgroup management.
Various known and unknown risks, uncertainties and other factors could lead to material differences between the actual future results, financial situation, development or performance of the company and the estimates given here. These factors include those discussed in Bayer’s public reports which are available on the Bayer website at www.bayer.com.
The company assumes no liability whatsoever to update these forward-looking statements or to conform them to future events or developments.