Donpanel 412 HCFC-141b base blend polyols for PUR

Donpanel 412 HCFC-141b base blend polyols for PUR

INTRODUCTION DonPanel 412 blend polyols is a compound which consists of polyether polyols, surfactants, catalysts and flame retardant in a special ratio. The foam has good thermal insulation property, light in weight, high compression strength and flame retardant and other advantages. It is widely used to produce sandwich plates, corrugated plates etc, which applies to make cold stores, cabinets, portable shelters and so on.

PHYSICAL PROPERTY

Appearance	Light yellow transparent viscous liquid
Hydroxyl value                   mgKOH/g	300-360
Dynamic viscosity  （25℃）      mPa.S	3000-4000
Density    （20℃）              g/ml	1.05-1.16
Storage temperature                ℃	10-25
Storage stability                   month	6

RECOMMENDED RATIO

Raw materials	pbw
blend polyols	100
Isocyanate	100-120

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

items	Manual mixing	High Pressure Machine
Raw material temperature     ℃	20-25	20-25
Moulding temperature    ℃	35-45	35-45
Cream time    s	30-50	30-50
Gel time      s	120-200	70-150
Free density  kg/m3	24-26	23-26

MACHINERY FOAM PERFORMANCES

Moulding density	GB 6343	≥38kg/m3
Closed-cell rate	GB 10799	≥90%
Thermal conductivity（15℃）	GB 3399	≤22mW/(m.K)
Compression strength	GB/T 8813	≥140kPa
Dimensional stability   24h  -20℃	GB/T 8811	≤1%
24h  100℃		≤1.5%
Flammability（Oxygen Index）	GB/T8624	>23.0