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Technical Data Sheet

 

 

EPIKOTE™ Resin MGS™ LR 135 and

EPIKURE™ Curing Agent MGS™ LH 133-138

Revised: January 26, 2017

 

CHARACTERISTICS

 

Approval

DNV-GL SE (Germanischer Lloyd)

Application

Rotor blades for wind turbines, boatbuilding, as laminating and adhesive resins (wood-epoxy construction), sporting goods, moulds, tools and other devices

Operational
temperature

-60 °C up to +50 °C without heat treatment
-60 °C up to +80 °C after heat treatment

Processing

Generally at temperatures between 15°C and 50°C, all common processing methods

Features

Pot life from approx. 10 min to 6hrs
Limited irritation potential

Special modifications

LR 135 LV: low viscosity
LR 135 T: thixotropic

Storage

Shelf life of 24 months in originally sealed containers

 


APPLICATION

EPIKOTE™ Resin MGS™ LR135 laminating resin system approved by the German Lloyd. It contains no solvents and fillers and is available for different pot lives. The system is used for processing of glass, carbon and aramide fibres, featuring high static and dynamic loadability. This system has very good adhesive properties with wood and other materials. 

 

The range of pot lives is between approx. 10 min. and more than 6 hours. This enables a selection of the optimum system for all processing methods. After precuring at room temperature, the manufactured components are workable and demouldable. The final properties, however, will only be obtained after postcuring at temperatures of more than 40°C. At room temperature, the fast curing agents LH 133 - 135 are processable and demouldable after 6 - 12 hours, while the very slow curing agents LH 136 - 138 have curing periods of 2 - 4 days at room temperature.

 

Laminates produced with this system result in high-gloss and non-tacky surfaces, even with unfavourable curing conditions, e. g. lower temperatures and/or high humidities. The mixing viscosity guarantees a fast and complete impregnation of the reinforcement fibres, however, the resin will not drain out of the fabrics on vertical surfaces.

 

Due to the chemical characteristics of this system we do not expect any problems concerning compatibility (e.g. blisters, tearing or changes in colour), when it is processed with gelcoats. However, comprehensive tests are indispensable.

 

Epoxy resins are super cooled liquids, therefore crystallisation is immanently possible. In an early stage, crystallisation is visible as a clouding, and can progress to a stage, where the resin becomes a wax-like solid. Crystallisation can be reversed by slow heating of the product to approx. 40°C - 60°C. This physical phenomenon is reversible and is no restriction to quality. In fact a high purity of material will increase a tendency for crystallisation.

 

Although LR135 is unlikely to crystallize at low temperatures, storage conditions of 15 - 30°C and low humidity are recommended. After dispensing material, the containers must again be closed carefully, to avoid contamination or absorption of water. All amine hardeners show a chemical reaction when exposed to air, known as „blushing“. This reaction is visible as white carbamide crystals, which could make the materials unusable.

 

The materials have a shelf life of minimum 2 years, when stored in their originally sealed containers.

 

Due to selected raw materials, we expect only minor problems concerning skin irritation and allergies during processing.

 

The relevant industrial safety regulations for the handling of epoxy resins and hardeners and our instructions for safe processing are to be observed.

 

 


SPECIFICATIONS

 

 

 

Laminating resin LR135

Density 1)

[g/cm³]

1,13 – 1,18

Viscosity 1)

[mPa∙s]

2.300 – 3.000

Refractory index 1)

 

1,558 – 1,562

 

 

 

Curing agent

 

 

LH133

LH134

LH135

Density 1)

[g/cm³]

1,04 – 1,08

1,03 – 1,09

0,99 – 1,03

Viscosity 1)

[mPa∙s]

400 – 700

200 – 350

50 – 150

Refractory index 1)

 

1,554 – 1,562

1,561 – 1,570

1,508 – 1,513

Potlife 2)

[min]

app. 10 min.

app. 10 min.

app. 20 min.

Tg pot

[°C]

80 – 90 °C unconditioned

65 – 75°C conditioned 3)

 

   

   

 Curing agent 

   

   

 LH136 

LH1364

 LH137 

 LH138 

 Density 1) 

 [g/cm³] 

 0,96 – 1,00 

0,94 – 0,98 

 0,94 – 0,98 

 0,93 – 0,96 

 Viscosity 1) 

 [mPa∙s] 

 10 – 80 

5 – 50 

 5 – 50 

 5 – 50 

 Refractory index 1) 

   

 1,472 – 1,480 

1,460 – 1,468

 1,452 – 1,462 

 1,450 – 1,460 

 Potlife 2) 

 [min] 

 app. 1 h 

app. 2,5 h

 app. 4 h 

 app. 6 h 

 Tg pot 

 [°C] 

 80 – 90 °C unconditioned 

 65 – 75°C conditioned 3) 

 

Measuring conditions:
1) measured at 25°C
2) 100g sample in water bath at 30°C
3) conditioned at 40 °C / 90% r.H.

 

  


MIXING RATIOS

 

 

LR135 : All curing agents

Parts by weight

100 : 35 ± 2

Parts by volume

100 : 41 ± 2

 

The mixing ratio stated must be observed very carefully. Adding more or less curing agent will not result in a faster or slower reaction – but in incomplete curing which cannot be corrected in any way. Resin and curing agent must be mixed very thoroughly. Mix until no clouding is visible in the mixing container. Pay special attention to the walls and bottom of the mixing container.

All curing agents have blue colour to distinguish between resin and curing agents, and for easier identification of a correct mixing process. Although unlikely, deviations in colour are possible (e.g. due to UV radiation after longer exposure to sun light), but however have no effect on the processing and final properties of the material



TEMPERATURE DEVELOPMENT

 

 Temp Development LR135

 

Measuring conditions: 100g sample in water bath at 30°C

 

Optimum processing temperature is in the range of 20°C to 35°C. Higher temperatures are possible, but will shorten pot life. A temperature increase of 10°C will halve the pot life. Water (e.g. high humidity or contained in additional fillers) causes an acceleration of the resin/ curing agent reaction. Different temperatures during processing are not known to have significant impact on the mechanical properties of the cured product.

 

Do not mix large quantities – particularly of highly reactive systems – at elevated processing temperatures. As the heat dissipation in the mixing container is very slow, the contents will be heated up by the reaction heat (exothermic resin-curing agent reaction) rapidly. This can result in temperatures of more than 200°C in the mixing container, which may cause smoke-intensive burning of the resin mass.

 


GEL TIME

 

 

Curing agent

 

LH133

LH134

LH135

20 – 25°C

app. 1 – 2 hours

app. 2 – 3 hours

app. 4 – 5 hours

40 – 45°C

app. 30 min.

app. 40 min.

app. 50 min.

 

 

 

Curing agent

 

LH136

LH137

LH138

20 – 25°C

app. 6 – 7 hours

app. 10 – 12 hours

app. 15 – 20 hours

40 – 45°C

app. 1 – 2 hours

app. 3 – 4 hours

app. 6 – 7 hours

 

Measuring conditions: Film thickness 1 mm at different temperatures



 


 VISCOSITY OF MIXTURE  


Viscosity of Mixture LR 135 (20170126)

Measuring conditions: rotation viscosimeter, plate-plate configuration, measuring gap 0.1 mm

 



TG DEVELOPMENT

 

EPIKOTE Resin MGS LR 135 and EPIKURE Curing Agent MGS LH 133-138_Tg1

 EPIKOTE Resin MGS LR 135 and EPIKURE Curing Agent MGS LH 133-138_Tg2

 EPIKOTE Resin MGS LR 135_Tg138

 EPIKOTE Resin MGS LR 135 and EPIKURE Curing Agent MGS LH 133-138_Tg4

 

 EPIKOTE Resin MGS LR 135 and EPIKURE Curing Agent MGS LH 133-138_Tg5

 

Measuring conditions for all Tg measurements: DSC, DIN EN ISO 11357

 

 


MECHANICAL DATA OF NEAT RESIN

 

Mechanical data

 

 

Density

DIN EN ISO 1183-1

[g/cm³]

1,10 – 1,20

Flexural strength

DIN EN ISO 178

[MPa]

100 – 120

Modulus of elasticity

DIN EN ISO 178

[GPa]

2,8 – 3,2

Tensile strength

DIN EN ISO 527-2

[MPa]

65 – 75

Compressive strength

DIN EN ISO 604

[MPa]

80 – 100

Elongation at break

DIN EN ISO 527-2

[%]

7,0 – 10,0

Impact strength

ISO 179-1

[kJ/m²]

60 – 80

Water absorption at 23°C

DIN EN ISO 175

24h [%]
 
 7d [%]

0,10 – 0,50
0,20 – 0,80

Curing: 8h at 70°C

 

Advice: 

Mechanical data are typical for the combination of laminating resin LR135 with curing agent LH135. Data can differ in other applications.

 

 

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DISCLAIMER

The information provided herein was believed by Hexion Inc. (“Hexion”) to be accurate at the time of preparation or prepared from sources believed to be reliable, but it is the responsibility of the user to investigate and understand other pertinent sources of information, to comply with all laws and procedures applicable to the safe handling and use of the product and to determine the suitability of the product for its intended use. All products supplied by Hexion are subject to Hexion’s terms and conditions of sale. HEXION MAKES NO WARRANTY, EXPRESS OR IMPLIED, CONCERNING THE PRODUCT OR THE MERCHANTABILITY OR FITNESS THEREOF FOR ANY PURPOSE OR CONCERNING THE ACCURACY OF ANY INFORMATION PROVIDED BY HEXION, except that the product shall conform to Hexion’s specifications. Nothing contained herein constitutes an offer for the sale of any product.

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