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Isophthalic 3720-L-1 Resin (220kg)


SKU: 1161
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Chemical/physical nature

Synolite 3720-L-1 is formulated for hand lay-up and spray-up applications. The thixotropic nature of the resin allows application on vertical parts without the risk of sagging or drainage.

Principal properties

Synolite 3720-L-1 is an unsaturated, isophthalic based polyester resin, diluted in styrene. This resin is thixotropic and pre-accelerated.

SKU: 1161 Categories:,

Product Description

Product specifications

Property Range Unit TM

Solids content, IR 52.0 – 54.0 % 2033

Stability min. 60 minutes 2300C

Viscosity, Physica, 20 s-1, 23ºC 450 – 520 mPa.s 2313

Viscosity, Physica, 250 s-1, 23ºC 300 – 350 mPa.s 2313

Viscosity, Physica, 50 s-1, 23ºC 370 – 430 mPa.s 2313

Gel time from 25 to 35ºC 20.0 – 25.0 minutes 2625

Cure time from 25ºC to peak 28.0 – 36.0 minutes 2625

Peak temperature 165 – 185 ºC 2625


TM 2313: Spindle Z2, 23ºC

TM 2625: 2% Butanox M50 by weight

Product specifications

Property Range Unit TM

Tensile E-modulus 2.7 GPa IISO 527-2

Elongation at break 3.5 % ISO 527-2

Tensile strength 60 MPa ISO 527-2

Flexural strength 120 MPa ISO 178

Flexural E-modulus 3.6 GPa ISO 178

Heat Deflection Temp. (HDT) 105 ºC ISO 74-A

Properties of the liquid resin (typical values)

Properties of the liquid resin (typical values)
Property Value Unit TM
Flash point appr. 33ºC 2800
Stability, no init., dark,
3 months –

Guidelines before use

Before use, the resin should be conditioned at a well defined, application dependent temperature (usually15ºC minimum for a MEKP / Co cure). Ensure the product is thoroughly stirred before use.

Storage guidelines

The resin should be stored in the original, unopened and undamaged packaging, in a dry place at temperatures between 5ºC and 30ºC. Shelf life is reduced at higher temperatures. The shelf life of styrene containing unsaturated polyesters will be significantly reduced when exposed to sunlight. Store in dark and in 100% light tight containers only.

Additional information

Weight 220 kg

Data Sheets

Material Safety Data Sheet (MSDS)
Material Safety Data Sheet (MSDS)
Technical Data Sheet (TDS)
Technical Data Sheet (TDS)


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