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Urea-formaldehyde resins of «KF-Zh» grade
UREA FORMALDEHYDE RESIN of “KF-ZH” grade
GOST 14231-88 (CN of FEA code 390 910 9000)
The resins are widely used in the process of production of plywood, gluing of furniture parts, joinery, for cored foundry mold, ground stabilization and also for press materials production, laminated plastics, plastic foam, adhesives, and coating of paper and textile processing.
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Specifications | |
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Physical configuration |
homogeneous suspension from white to light-yellow color without foreign impurity |
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Mass fraction of dry residue, % |
67±2 |
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Mass fraction of free formaldehyde, %, no more than |
0,9 |
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Relative viscosity under (20,0±0,5) °С by viscosimeter B3-1 with nozzle 5,4 mm |
20–40 (F) 40–60 (M) 15-30 (L) |
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Activity index of hydronium ions, рН |
7,5–8,7 |
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Gel time under 100°С |
40–65 |
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Resins miscibility with water under 20°С with ratio to volume basis resin: water=1:2 |
complete |
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Tensile strength at spalling plywood after maceration of samples in water during 24 hours, MPa, no less than |
1,5 |
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Density at 20°С, g/sm3 |
1,26–1,28 |
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Freezing point, °С |
minus (14-18) |
Safety requirements: resins represent incombustible mixture, inexplosive aqueous suspension.
Transportation: in railroad tank car, truck tank, steel barrels ensuring the protection of resins quality in transit and storage.