Donfoam 825PIR HFC-365mfc base blend polyols for continuous PIR block foam

Donfoam 825PIR HFC-365mfc base blend polyols for continuous PIR block foam

INTRODUCTION Donfoam825 blend polyether polyol used in the manufacture of high flame retardant PIR block foam with HFC-365mfc/227 as foaming agent, products and isocyanate reaction by the formation of the foam has uniform foam cell , low thermal conductivity, thermal insulation performance is good, flame retardant performance is good, low temperature no shrinking crack etc. Widely used in the process of all kinds of insulation work such as: building external wall, cold storage, tanks, large pipes etc.

PHYSICAL PROPERTY

Appearance	Light yellow to brown transparent liquid
Dynamic viscosity（25℃）   mPa.S	300±100
Density    （20℃）         g/ml	1.20±0.1
Storage temperature           ℃	10-25
Storage stability             month	6

RECOMMENDED RATIO

Raw materials	pbw
DK-1101  Blend Polyether Polyol	100
Isocyanate	180±20

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

Items	Manual mixing	High pressure machine
Raw material temperature   ℃	20-25	20-25
Mould temperature        ℃	50-60	50-60
Cream time              s	25-35	20-30
Gel time                 s	90.-130	70-100
Tack free time             s	150-200	120-160
Free density            kg/m3	28-30	27-29

MACHINERY FOAM PERFORMANCES

Overall Mold density	GB 6343	≥45kg/m3
Molding Core Density		≥40kg/m3
Closed-cell Rate	GB 10799	≥90%
Initial Thermal Conductivity（15℃）	GB 3399	≤24mW/(m.K)
Compressive Strength	GB/T8813	≥150kPa
Dimentional Stability   24h  -20℃24h   70℃	GB/T8811	≤1% ≤1.5%
Water Absorption Rate	GB 8810	≤3%
Flammability	GB 8624	B1/B2/B3
Closed-cell Rate	GB 10799	≥90%
Initial Thermal Conductivity（15℃）	GB 3399	≤24mW/(m.K)

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.