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ТУ 2254-016-72311668-2005
Field of application
Two-component polyurethane system ”Corundum 503” based
on “Corundinol 503” or “Corundinat PM” (component “A”) and “Corundinat PM” (component “B”) is intended for
getting closed-cell rigid polyurethane foam using method
of pouring on mahines of
low and high
pressure. It is used in
production of household refrigerators, freezing rooms, and also industrial
equipment. Cyclopentane, used as a
frother, is injected in polyurethane
system by customer during processing of the
components.
COMPONENTS’ CHARACTERISTICS:
а)
Component «А» - «Corundinol
503»
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Characteristic name
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Value
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Appearance
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Liquid of light-yellow to dark-brown colour without foreign impurities
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Hydroxyl number, mg, in
the range
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370 - 440
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Mass share of water,
%, in the range
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2,6 – 3,0
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Dynamic viscosity under 250С, mPa·s
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2300 - 3000
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Density under 250С, g/cm3, in the range
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1,05 – 1,10
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б) Component «B» - «Corundinat PM» by ТУ
2472-002-72311668-2004 or foreign analogue.
COMPONENT RATIO: А : cyclopentane : B =
100 : 14 : 145 (by mass)
TECHNOLOGICAL PROBE INDEX
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Characteristic
name
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Value
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Starting time, s
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12 - 18
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Gelatinization time, s
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65 - 90
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Apparent density during free foaming, kg/m3, in the range
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22 - 27
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Appearance
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Solid foamed material of
soft-celled structure with few consolidated cells
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PHYSICAL AND MECHANICAL CHARACTERISTICS OF PPU *
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Characteristic
name
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Value
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Apparent density in unit, kg/m3, in the
range
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30 - 32
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Breaking stress under bending, kPa,
not lower
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200
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Breaking stress under pressing and 10% deformation, kPa, not lower
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150
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Water absorption for 24 hours, %, not higher
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2,5
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Coefficient of thermal conductivity, Vt/m×К, not higher
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0,02
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Softening temperature under the load of 10Н, 0С, not lower
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150
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Stability of proportions during 24 h. under 800С, %, not higher
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1,0
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Presented characteristics can be changed on demand of
the customer according to the aims of technological process.
Package.
Component «А»
is poured into aluminium barrels by ГОСТ 21029, steel barrels
by ГОСТ 6247,
ГОСТ 13950, ГОСТ 26155, ТУ 38.1011264 with
capacity in range from 100 to 250 dm3.
Guarantee shelf life:
- component А - 3 months from the day of production;
- component Б – 6 months from the day of production.
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