Donspray 502 HCFC-141b base blend polyols

Donspray 502 HCFC-141b base blend polyols

INTRODUCTION DonSpray 502 is spray blend polyols with HCFC-141B as blowing agent, it reacts with isocyanate to produce foam which has excellent performances, which are as follows, 1) fine and uniformity cells 2) low thermal conductivity 3) perfect fire resistance 4) excellent low temperature dimentional stability. It applies to all kinds of thermal insulation projects which use the spray, such as cold rooms, large pots, large-scale pipelines and construction out-wall or inner-wall etc.

PHYSICAL PROPERTY

AppearanceHydroxyl Value                mgKOH/g Dynamic Viscosity (25 ℃)       mpa.s Specific gravity (20 ℃ )           g/ml Storage Temperature             ℃ Storage Stability               month

Pale yellow to brown viscous liquid 200-300 100-200 1.12-1.20 10-25 6

RECOMMENDED RATIO

	pbw
DonSpray 502 blend polyolsIsocyanate MDI	100 100-105

Reactivity Characteristics (Component temperature is 20℃, the actual value is varied according to pipe diameter and processing condition.)

Cream Time                  sGel Time                     s

3-5 6-10

FOAM PERFORMANCES

items	Test Method	Index
Spray DensityClosed-cell Rate Initial Thermal Conductivity（15℃） Compressive Strength Adhesive Strength Elongation at break Dimentional Stability  24h  -20℃ 24h   70℃ Water Absorption Oxygen Index	GB 6343 GB 10799 GB 3399 GB/T8813 GB/T16777 GB/T9641 GB/T8811 GB 8810 GB 8624	≥32kg/m3 ≥90% ≤24mW/(m.K) ≥150kPa ≥120kPa ≥10% ≤1% ≤1.5% ≤3% ≥26

The data provided above are typical value, which are tested by our company. For our company's products, the data included in the law do not have any constraints.