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TU 2254-006-02748978-2004
Three-component PU system is
designed for manufacture of rigid polyurethane foam by evaporation method.
Basic components of the
system are processed by evaporation technique using high- or low-pressure
machines working by two-component scheme.
The system is delivered as
three components:
1. Component “À1” – “Korundinol 117”, which is a mixture of polyesters,
foaming agent (Freon F-141b), foam stabilizer and other specific agents.
2. Catalyst system – “Korundikat À2 – 117”.
3. Component “B” - polyisocyanate
“Korundinat PM”.
Characteristics of
Components
Components “A1” and “A2”
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Name of Parameter
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Value
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Component À1
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Component À2
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Korundinol À1-117-1
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Korundinol À1-117-2
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Korundinol
À1-117-3
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Korundikat À2 - 117
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Appearance
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Liquid coloured from light-yellow
to dark-brown without contaminating impurities
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Colourless or pale yellow liquid
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Hydroxyl number, mg
ÊÎÍ/g, in the range
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340 - 390
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350 - 450
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260 - 360
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-
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Mass part of water,
%, max.
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1.2
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2.0
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2.0
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-
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Dynamic viscosity at 20 0Ñ,
mPa .s
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180-220
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200-300
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200-300
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-
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Component “B” – polyisocyanate “Korundinat PM”, TU
2472-002-72311668-2004
Processing Technique
Ratio of mixture À : B = 100
: 130 (by weight)
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Process Test Parameters
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Value for System
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Korundinol À1-117-1
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Korundinol À1-117-2
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Korundinol À1-117-3
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Start time, s, in the range
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9 – 18
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5 - 9
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5 - 9
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Gelation time, s, in the range
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20 - 35
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12 - 20
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12 - 20
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Appearance of hardened
polyurethane foam and structure on vertical section
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Rigid foamed material.
Fine-cellular structure with a small number of larger cells
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Physical
and Mechanical Properties of PU Foam*
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Name of Parameter
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Value
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Apparent density in the
product, in the range, kg/m3
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40 - 70
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Heat conductivity, max., W/mK
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0.030
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Ultimate strength at 10%
deformation:
·
at compression, MPa
·
at bending, min., MPa
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0.2
0.35
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Water absorption for 24
hours, max., cm3/m2
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250
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Heat-resistance by Vika, min., ÎÑ
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150
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*- the given indicators can
be changed on the customer’s request
1. Components À1 – “Korundinol
117”, À2 – “Korundikat
À2 – 117” in combination with polyisocyanate are designed for manufacture of rigid
polyurethane foam by evaporation method.
2. Basic components of the polyurethane foam system are processed by high- or
low-pressure evaporation machines working by two-component scheme.
3. The components should be stored in leakproof
package in a dry place.
4. Before application component A1 – “Korundinol
117” is mixed with catalyst – A2 – “Korundikat À2 – 117”. The quantity of added catalyst is
defined by ambient temperature:
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Ambient temperature, 0Ñ
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From +300Ñ
to + 150Ñ
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From +140Ñ to + 50Ñ
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From +40Ñ to - 50Ñ
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From -60Ñ to -100Ñ
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From -110Ñ to -150Ñ
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Quantity of component À2 per 100 kg of component À1
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5.0
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7.0
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9.0
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11.0
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13.0
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5. The obtained mixture of
component À1 – “Korundinol 117” with catalyst À2 – “Korundikat À2 – 117” is to be stirred for 30 minutes. Temperature
of components at mixing should be 20 ± 20Ñ.
6. Before processing the components are heated up to 20 ± 20Ñ in
thermostatically controlled chamber of evaporation machine.
7. Mixture ratio of component À (with added catalyst À-2) to component B (“Korundinat PM”) is 1 : 1.3
correspondingly.
8. The ratio is checked by separated batching of components in separate volumes
for equal intervals and by weighing of each component.
Packing. Component “À” is poured into 100-250
dm3aluminium drums according to GOST
21029, steel drums according to GOST 6247, GOST 13950, GOST 26155, TU
38.1011264.
Guarantee storage period:
- of component A - 3 months
from day of manufacture;
- of component B - 6 months from day of manufacture.
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