China wholesale Quasi Mdi-Terminated System Mdi - Donfoam 822PIR HCFC-141B base blend polyols for continuous PIR block foam – INOV

Donfoam 822PIR HCFC-141B base blend polyols for continuous PIR block foam

INTRODUCTION

DonFoam 822/PIR is a kind of blend polyols with  hcfc-141b foaming agent, with polyol as the main raw material, mixed with special auxiliary agent, suitable for the insulation of construction, transportation, shell and other products .This material is specially developed for continuous line .The polyurethane product prepared by reacting it with isocyanate has the following advantages:

1. Foam has uniform strength and dimensional stability in all directions

2. The foam products can be cut into different shapes according to the requirements of the product

3. Excellent thermal insulation performance

PHYSICAL PROPERTY

 

DonFoam 812/PIR

Appearance                 

OH value                  mgKOH/g

Dynamic viscosity (25℃)      mPa.S

Density (20℃)      g/ml

Storage temperature               ℃

Storage stability ※         /month

Light yellow to brown transparent liquid

150-250

200-300

1.15-1.25

10-25

6

RECOMMENDED RATIO

 

Pbw

DonFoam 812/PIR

Isocyanate

100

150-200

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

 

Manual Mix

High pressure

Raw Material Temperature      ℃

Cream time       S

Gel time      S

Free density  Kg/m3

20-25

20-50

160-300

40-50

20-25

15-45

140-260

40-50

FOAM PERFORMANCES

Overall Molding Density

Closed-cell Rate

Initial Thermal Conductivity(15℃)

Compressive 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

≥40 Kg/m3

≥90%

≤22mW/m.k

≥150 KPa

≤0.5%

≤1.0%

B2、B1