Ebalta GH 781 / GH 781 S

About
ebalta GH 781 is a heat resistant two components epoxy resin with very low thermal expansion and high mechanical strength. ebalta GH 781 is suitable to pour on a cast aluminium carrier (sandblast surface). With a thickness of 10-20 mm you get a high quality surface with good thermal conductivity. With hardener GH 781 S a better curing and therefore shorter curing time is reached. For any amendments, repairs and sealings we also have a putty system available. By means of this system together with HRS hardener thicknesses of 5-6 mm can be reached. Applications PU-foaming tools Heatable foundry patterns Properties heat resistant short curing time high strength low thermal expansion&&

About

ebalta GH 781 is a heat resistant two components epoxy resin with very low thermal expansion and high mechanical strength. ebalta GH 781 is suitable to pour on a cast aluminium carrier (sandblast surface). With a thickness of 10-20 mm you get a high quality surface with good thermal conductivity. With hardener GH 781 S a better curing and therefore shorter curing time is reached. For any amendments, repairs and sealings we also have a putty system available. By means of this system together with HRS hardener thicknesses of 5-6 mm can be reached. Applications PU-foaming tools Heatable foundry patterns Properties heat resistant short curing time high strength low thermal expansion&&

Product Description
Generic	环氧树脂
Material Status	Commercial: Active
Features	Good Rigidity,Heat Resistance, Good,Fast Cure
Availabilitys	Africa & Middle East ,North America,Asia Pacific,Europe
Process Methods	casting

Technical Data
PHYSICAL	Nominal value	Unit	Test method
Shrinkage rate	0.050	%	Internal Method

IMPACT	Nominal value	Unit	Test method
Charpy Unnotch Impact strength	6.0 to 8.0	kJ/m²	ISO 179

Uncured Properties	Nominal value	Unit
Density
20℃	2.60 to 2.80	g/cm³
viscosity
25℃	11 to 16	Pa·s
Curing time
20℃	12 to 14	hr
storage stability
20 ℃	90 to 110	min

MECHANICAL	Nominal value	Unit	Test method
Shore hardness
Shaw’s D	87 to 93		ISO 7619
Bending modulus	9800 to 12800	MPa	ISO 178
bending strength	80.0 to 100	MPa	ISO 178
compressive strength	135 to 155	MPa	ISO 604

THERMAL	Nominal value	Unit	Test method
Hot deformation temperature
0.45 MPa, unannealed	113 to 119	℃	ISO 75-2/B
Linear coefficient of thermal expansion
MD	3.5E-5 to 4.0E-5	1/℃	DIN 53752
Thermosetting components
resin	按重量计算的混合比: 100
Hardening method	按重量计算的混合比: 5.0

Notes
1. Typical properties: these are not to be construed as specifications.
2. 1000 g
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