Donpipe 322 HCFC-141b base blend polyols for pipeline shell

Donpipe 322 HCFC-141b base blend polyols for pipeline shell

INTRODUCTION DonPipe 322 is a kind of blend polyols with  hcfc-141b as foaming agent, taking polyol as the main raw material, mixing with a special auxiliary. This material suitable for outer thermal insulation shells which are used for  water, oil and gas pipelines .The polyurethane product prepared by reacting it with isocyanate has the following advantages: -- good compressive strength and dimensional stability -- high close-cell rate and good waterproof performance -- good insulation performance

PHYSICAL PROPERTY

	DonPipe 322
AppearanceHydroxyl value                 mgKOH/g Dynamic viscosity （25℃）   mPa.S Density （20℃）             g/ml Storage temperature             ℃ Storage stability               months	Light yellow transparent viscous liquid 200-400 200-400 1.1-1.16 10-25 6

RECOMMENDED RATIO

	Pbw
DonPipe 322Isocyanate	100 120-160

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

	Manual mix	High pressure
Raw material temperature    ℃CT      S GT      S TFT      S Free density   Kg/m3	20-25 7-15 30-50 40-60 25-30	20-25 6-12 20-40 30-50 25-30

FOAM PERFORMANCES

old densityClose-cell rate Thermal conductivity （10℃） Compression 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

≥50Kg/m3 ≥90% ≤22mW/m.k ≥150 KPa ≤0.5% ≤1.0% B3、B2、B1