Cookie Img
Back to top

Product Showcase
Home » Products » Bismaleimide Resins and Monemers » ABRON R750

ABRON R750

ABRON R750
ABRON R750
Product Code : ABRON R750
Product Description

PRODUCT TRADE NAME      : ABRON R 750
PRODUCT TYPE                   : POLYIMIDE RESIN (Bis-itaconimide type) Powder Resin

As a result of the efforts of Indian Space Research Organization to develop a processible polyimide, a prepolymer having excellent processability, stability at room temperature and with moderate cure temperatures was developed. Composites made from this prepolymer have yielded components for space and aerospace applications. ABRON-R 750 is being manufactured by A B R ORGANICS LIMITED with the license from Indian Space Research Organization.

ABRON-R 750 is highly amenable for polar & filament winding technology also. The prepregs made from ABRON-R 750 have a long shelf life of 3 to 6 months at room temperature.

GENERAL PROSEDURE FOR MAKING LAMINATES

Silica/Glass/Carbon cloth is impregnated with the resin solution. The solvent is allowed to evaporate (at 55 – 60°C when DMF is used as an solvent). The prepreg should have resin content of 35 – 40% weight.

The tack & drape of the prepreg is controlled by adjusting the residual solvent content.

 

The prepregs are stacked in mold and heated to 120°C and held for one hour under 60 psi pressure. The mold temperature is raised to 160 – 165 °C as a second step and maintained for another hour. Final cure is done by heating the mold to 200 – 220 °C for 2 hours under pressure. The laminate is released after cooling under pressure to 80 – 100 °C. Post curing is to be done at about 125 °C for 6 hours.

This procedure, however is not same for all shapes and thickness of laminates. The exact cycle has to be determined based on trials.

 

 

APPLICATIONS

  • Aerospace & space applications as resin matrix for composites ·
  • Slot wedges for locomotive traction motors

SPECIFICATIONS OF ABRON – R 750

State Fine Powder
Colour Light Pinkish Brown
Specific Gravity at 25°C 1.1
Solubility NMP / DMF
Bulk viscosity of 40% Solution 40 – 100 cP
Shelf life of Resin Powder 6 months at ambient temperatures (< 400 C )
Service Temperature -200 to +300°C
Cure Temperature 200 °C – 230 °C
Dielectric Constant 80 – 90 KV/mm
Surface Resistivity at 25 °C 0.5 X 1014 Ohm.cm
Volume Resistivity at 25 °C 2.9 X 1014 Ohm.cm
Tan d at 25 °C 0.004
Volume Resistivity at 200 °C 4.7 X 1012 Ohm.cm
Tan d at 200 °C 0.025

MECHANICAL PROPERTIES OF LAMINATES (ASTMD – 1184)

CARBON FIBRE ( UNIDIRECTIONAL)

TENSILE STRENGTH 8 X 103 kg/cm2
FLEXURAL STRENGTH 5.5 x 103 kg/cm2
INTERLAMINAR SHEAR STRENGTH 305 kg/cm2

GLASS FIBRE ( UNIDIRECTIONAL )

TENSILE STRENGH 5.2 X 103 kg/cm3
FLEXURAL STRENGTH 5.0 X 103 kg/cm3
INTERLAMINAR SHEAR STRENGTH 135 kg/cm2

ELECTRICAL PROPERTIES OF GLASS POLYMIDE COMPOSITE

  • Dielectric Constant at 10 KHz frequency with 3.3 mm thick laminate = 2.1
  •  Descipation factor at 10 KHz frequency with 3.3 mm thick laminate = 0
  •  a) Electromagnetic radiation transparency with unidirectional glass/ PI laminate at 11.9 G.Hz ——- 89%
  • b) Glass cloth – PI laminate ——- 52% c) Glass cloth-epoxy laminate ——- 5 6%
Tensile strength 400 Mpa
Flexural strength 450 Mpa
Inter Laminar Shear strength 25 Mpa
Resin content 26 to 28% only
Density 1.8 – 1.9 gm/cc

The above properties meet the requirements of composites functioning uptoo 220°C and at 400°C for short duration application.

MECHANICAL PROPERTIES OF LAMINATES BASED ON ABRON – R 750

Composite systems Tensile strength 103
kg/cm2

Av                   S.D
  Flexural strength
103 kg/cm2

Av.               S.D  
Interlaminar shear
Strength kg/cm2

Av.          S.D

 ABRON R 750/carbonUnidirectional

  8.094               0.055

5.79            0.565

305.55       23.22

ABRON R 750/glassUnidirectional

     –                      –

 8.614          1.15

325.9         6.30

ABRON R 750/glass Cloth

      –                      –

3.62            0.11

 250.9         5.8

MECHANICAL PROPERTIES OF THERMALLY AGED PROPERTIES

Temperature0 C

Flexural strength

ILSS


ABRON R 750 ABRON R 750
30 2530 325
150 2741
175 2806
200 2840 (2261)* 291.5
250 3022 300

Value obtained after soaking the sample for 100 hrs at 200°C.

 


ABR ORGANICS LIMITED

Contact Us

( *represents compulsory fields )

Tips on getting accurate quotes. Please include product name, order quantity, usage, special requests if any in your inquiry.



Contact Details
ABR ORGANICS LIMITED
A-3, Sri Madhava Apartments, 2-2-23/41/4 & 5, Bank Colony, Bagh Amberpet,Hyderabad - 500013, Telangana, India
Phone :+917210130119
Fax :91-40-27426059
Mr. K. Naveen Chandra (Joint Managing Director)
Mobile :+917210130119