Rigid Polyester Polyols

SP320GA

1. Introduction

SP-320GA is a price competitive aromatic based polyester polyol that exhibits low shrinkage, high reactivity and functionality, and high strength suited for most rigid foam basic blends.

2. Characteristics

▶ Low Viscosity

▶ High Functionality

▶ Excellent Flame Retardancy

▶ Low Thermal Conductivity

3. Typical Properties

  Unit Specification
Hydroxyl Value mgKOH/g 305 ~ 335
Acid Value mgKOH/g max. 2.0
Water Content % max. 0.15
Viscosity at 25℃ cps 1,500 ~ 2,500
Specific Gravity at 25℃   1.210 ± 0.02

4. Guide Formulation

Ingredients Part by weight
SP-320GA

40

*1)Polyol A

60

Silicone Surfactant

1.5

Water

1.0

TCPP

10

*2)Catalyst

0.6

R-141b

28

*1) Sucrose based polyether polyol

*2) Amine/Metal catalyst

5. Reactivity / Density

5.1)   Foaming Condition

Mixing temperature                          25℃

Mixing speed/time                            7,000 rpm/8sec Mixing Ratio(polyol/C-MDI)                          100/110

* C-MDI : NCO% = 31

 5.2)   Reactivity

Cream time                                        31 – 35 sec

Gel time                                             88 – 98 sec

Tack free time                                140 -150 sec

Free rise density                             27 – 28 kg/㎥

6. Physical Properties

  Unit Results
Core density kg/㎥ 40-45
Compressive strength N/㎟ min. 0.3
Thermal conductivity W/m.K min. 0.020
Closed cell content

%

min. 90
Dimensional stability Vol %  
-30℃, 48hrs   max. 2.0
70℃, 48hrs   max. 1.0
70℃/95RH, 48hrs   max. 4.0

7.  Packing

Packing : In drums, 220 kg net

8.  Shelf Life / Storage

Storage temperature :                             15 – 35℃

Shelf Life :                                           12 months  (in closed, sealed drums)