Chinese Professional Pu System For Pipeline Insulation - Donfoam 825PIR HFC-365mfc base blend polyols for continuous PIR block foam – INOV

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.