Hardener LT (90 min)

Hardener for Epoxy Resin L

• Low viscosity (< 40 mPa•s, at 25 °C)
• Better impregnability of reinforcing fibers
• Better milling edge quality
• Higher stiffness (+ approx. 17 %)
• Tendency higher strength
• Gardner color code < 2

Epoxy Resin L + Hardener LT

The Epoxy Resin L + Hardener LT system is very suitable for bonding wood, metal and PS rigid foams such as Styropor® due to its low surface tension, good adhesion and low curing shrinkage. It can be processed in all common methods such as hand laminating, pressure and vacuum impregnation as well as pressing and wrapping.

Processing time: 90 minutes

Mixing ratio:
100 : 25 parts by weight of resin to hardener
100 : 29 parts by volume of resin to hardener

Curing time:
16-24 h at room temperature, then 16 h at 70 °C

Tempering is essential, otherwise the degree of cross-linking will be too low, resulting in brittleness.
Furthermore, the relative humidity during processing and curing should be below 50 %, the lower it is, the better.

Glass transition temperature (Tg)*:
Untempered after 7 days at 23 °C: approx. 52-53 °C
Tempered at 130 °C for 3 h: approx. 102-103 °C

* not measured empirical value

Heat deflection temperature (according to HDT)*:
After 7 days at 23 °C curing (max.): approx. 50 °C
After 3 h at 130 °C tempering (max.): approx. 100 °C

*see also measurement reports in the additional information

Important note:
Hardener LT is a completely new development with an adapted, modern formulation. The ingredients have been selected according to the latest findings, also with regard to hazard-determining components. We have based the properties on the previous hardener EPH 161. Production of the original hardener EPH 161 was discontinued by the manufacturer Westlake (former brand names Hexion, Borden-Chemical, and Bakelite) a few years ago due to a lack of demand.

However, some of the values and properties of the LT hardener are different. This is simply because the original hardener EPH 161 still used components that no longer correspond to the state of the art. In this respect, a direct comparison with the original hardener EPH 161, as it has been produced since the 1970s, is not possible.