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Products of organic chemistry

Polyurethane system SPU “Korund 445”


ТU 2254-015-72311668-2005

Three-component system SPU “Corundum 445” based on “Corundinol 445-1” or “Corundinol 445-2” (component “A”) and “Corundinat PM” (component “B”) and catalyst “KSP-1” or “KSP-2” is intended for production of heat-resistant “sandwich-panels” using continuous method.

During the processing of the components can be used machines as of high pressure, as of low. Recommended temperature of the equipment during processing is +20 ÷ 300С. Component “A” contains freon 141b as foaming agent.

On demand of the customer PU-systems “Corundum 445-1C” and “Corundum 445-2C” are delivered without injected component “A” freon.

COMPONENTS’ CHARACTERISTICS:

Component «А» - «Corundinol 445-1» или «Corundinol 445-2»

Characteristic name

Corundinol 445-1

Corundinol 445-2

Appearance

Liquid of light-yellow to dark-brown colour without foreign impurities

Hydroxyl number, mg, in the range

250-320

Mass share of water, %, in the range

1,4 – 1,9

1,1 – 1,5

Component «B» - «Corundinat PM» by ТУ 2472-002-72311668-2004

COMPONENT RATIO DURING PROCESSING:

For SPU «Corundum 445-1» - А : KSP-1 : B = 100 : 3,5 : 140 (by mass)

For SPU «Corundum 445-2» - А : KSP-2 : B = 100 : 4 : 140 (by mass)

TECHNOLOGICAL PROBE INDEX *

Characteristic name

А - 445-1

А - 445-2

Starting time, s

12-17

10 - 15

Gelatinization time, s

35-45

40 - 55

Apparent density during free foaming, kg/m3, in the range

30-40

40 -45

Appearance of solid poliurethane and structure on the parallel cut

Solid foamed material of soft-celled structure with few consolidated cells

PHYSICAL AND MECHANICAL CHARACTERISTICS OF PPU *

Characteristic name

Значение

Apparent density in unit, kg/m3, in the range

40-55

Breaking stress under bending, kPa, not lower

200

Breaking stress under pressing and 10% deformation, kPa, not lower

100

Water absorption for 24 hours, %, not higher

2,5

Coefficient of thermal conductivity, Vt/m×К, not higher

0,028

Softening temperature under the load of 10Н, 0С, not lower

170

Stability of proportions during 24 h. under 800С, %, not higher

1,2

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.

Copyright © 2004 Korund
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