PRODUCT TRADE NAME : ABRON BR 720
PRODUCT TYPE : POLYIMIDE RESIN ( Bis-malimide based )
Typical Physical Properties of ABRON BR 720
| RESIN Uncured Resin |
Appearance
Melting point(°C)
DSC Exotherm peak
temperature,(°C)
Bulk polymerization energy, J/g |
Yellow
~ 80 - 90°C
260°C
> 180°C |
| CURED RESIN |
Colour
Mechanical Properties
Tensile strength, psi
Tensile modulus, psi
Flexural strength, psi
Flexural modulus, psi
Flexural strain to failure, % Fractural energy, in.-ib/in.2
Glass transition temperature, °C |
Brown
6-12 x 103
6-7 x 105
11-21 x 103
5-7 x 105
1.3-2.3
0.14-0.19
230-290 |
PROPERTIES OF ABRON BR-720 LAMINATES
| Testing Standard |
BS 3953 PI - 1 |
| Reinforcement | Glass Fabric |
| Resin | Polyimide |
| Colour | Dark Brown |
| |
Mechanical Properties
| Felxural Strength (ISO 178), | 1200°C | 500 MPa 360 MPa |
| Modulus of Elasticity (ISO178) | 1 |
25,000 MPa |
| Compressive Strength (ISO 604) | 1 |
650 MPa |
| Izod Impact Test (ISO 180/2A) | 1 | 55 kj/n2 |
| Shearing Strength (EN 60893-2) |
1 |
70 MPa |
| Tensile Strength (ISO 527) | 1 |
300 MPa |
Electrical Properties
| Electric Strength (IEC 243-1) | 2 | 20 kv/mm |
| Permittivity (IEC 250) | 3 |
4.0 at 50Hz. |
| Dissipation Factor (IEC 250) | 3 | 0.01 at 50 Hz. |
Insulation systems (IEC 167)
| 4 |
1000 M ? |
| Comparitive Tracking Index (IEC 112) | 1 | 250 CTI |
| | |
PHYSICAL AND THERMAL PROPERTIES
Thermal Indurance Index, 20,000 hrs. (IEC 216)
|
- |
180 - 240°C |
Flammability (IEC 707)
|
1 |
FV 0 |
Density (IEC 1183-A)
|
1 |
1.95 gm/cm3 |
Water absorption (IEC 62-1)
|
4 |
15 mg. |
Conditioning:
- 24h/23°C/ 50% RH.
- 24h/23°C/50% RH + 1h in oil at 90°C.
- 96h/105°C + 1h/230C/20% RH.
- 24h/500 C + 24h in water at 23°C.
- 96h/105°C + 1h in oil at 90°C.
GENERAL METHOD OF PREPARATION OF LAMINATES
- Prepare a 45 - 50 % solution of ABRON BR720 in dry NMP/ DMF/ DMAc.
- Use this solution to impregnate glass-fiber fabrics and then dry at 160°C for 10 minutes to
obtain a B-stage prepreg.
- Stack required number of the B-stage prepregs between aluminium foils / mylar sheets.
- Place the stack between heated press plates at a temperature of 120°C.
- Immediately apply a pressure of 210 psi to 800 psi depending upon the thickness.
- Increase the temperature progressively to 180°C in 30 minutes for stack not thicker than
3/8 in.
- Cure the laminate at 180°C for 1 -2 hrs.
- Remove the laminate from the hot press at 100°c and post cure it for 16 - 24 hours at 250°C
|
