Donpipe 302 HCFC-141b base blend polyols for pipeline insulation

Donpipe 302 HCFC-141b base blend polyols for pipeline insulation

INTRODUCTION This product is a type of blend polyols premixed with HCFC-141B, which is specially researched for rigid PUF to produce thermal insulation pipes. It is widely used in steam pipes, liquefied nature gas running pipes, oil pipes and other fields. The characteristics are as follows: (1) good flowability, by regulating formula to suit different pipe diameters. (2) excellent low temperature dimensional stability

PHYSICAL PROPERTY

Appearance	Light yellow to brown transparent liquid
Hydroxyl value            mgKOH/g	300-450
Dynamic viscosity（25℃）   mPa.S	200-500
Density    （20℃）         g/ml	1.10-1.16
Storage temperature           ℃	10-25
Storage stability             month	6

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

	Manual mixing	High pressure machine
Ratio（POL/ISO）	1:1.10-1.1.60	1:1.10-1.60
Rise time                   s	20-40	15-35
Gel time                     s	80-200	80-160
Tack free time                s	≥150	≥150
Free density              kg/m3	25-40	24-38

FOAM PERFORMANCES

Mold density	GB 6343	55-70kg/m3
Closed-cell rate	GB 10799	≥90%
Thermal conductivity     （15℃）	GB 3399	≤24mW/(m.K)
Compression strength	GB/T8813	≥200kPa
Water absorption	GB 8810	≤3（V/V）%
Dimensional stability 24h  -30℃	GB/T8811	≤1.0%
24h  100℃		≤1.5%

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.