Donfoam 812PIR HCFC-141B base blend polyols for PIR block foam

Donfoam 812PIR HCFC-141B base blend polyols for PIR block foam

INTRODUCTION DonFoam 812/PIR is a kind of blend polyols with  hcfc-141b foaming agent, with polyol as the main raw material, mixed with special auxiliary agent, suitable for the insulation of construction, transportation, shell and other products.The polyurethane product prepared by reacting it with isocyanate has the following advantages: 1.Foam has uniform strength and dimensional stability in all directions 2.The foam products can be cut into different shapes according to the requirements of the product 3.Excellent thermal insulation performance

PHYSICAL PROPERTY

	DonFoam 812/PIR
AppearanceOH value                  mgKOH/gDynamic viscosity （25℃）      mPa.S Density （20℃）      g/ml Storage temperature               ℃ Storage stability ※         month	Light yellow to brown transparent liquid 150-250 200-300 1.15-1.25 10-25 6

RECOMMENDED RATIO

	Pbw
DonFoam 812/PIRIsocyanate	100 150-200

TECHNOLOGY AND REACTIVITY (the exact value varies depending on processing conditions)

	Manual Mix	High pressure
Raw Material Temperature      ℃Cream time       SGel time      S Tack free time      S Free density  Kg/m3	20-25 30-50 140-180 300-350 28-32	20-25 25-45 120-160 270-320 27-31

FOAM PERFORMANCES

Overall Molding DensityClosed-cell RateInitial Thermal Conductivity（15℃） Compressive Strength Dimensional Stability   24h  -20℃ 24h  100℃ Flammability

GB/T 6343  GB/T 10799 GB/T 3399 GB/T 8813 GB/T 8811   GB/T 8624

≥50 Kg/m3≥90%≤22mW/m.k ≥150 KPa ≤0.5% ≤1.0% B2、B1