Reversol P-9940 is a non-promoted thixotropic orthophthalic based unsaturated polyester resin of high unsaturation which has good heat and chemical resistance. Hence, Reversol P-9940 is a versatile resin suitable for construction of tanks, pipes and fumestacks etc, for operation in a range of environments and elevated temperatures. The resin can be used to back up other specialty resins, either to produce a combination of properties or for economy. Reversol P-9940 can be used to laminate Celmar (glassfibre backed polypropylene) and to reinforced suitably treated µPVC to upgrade the operation conditions of the material. This resin is also suitable for the fabrication of moulds for heat-assisted contact moulding and hot-press moulding processes.

Available Documents

TDS Download

Technical Informations

Application Advice/Typical Applications

(# The curing schedule was 12 hrs at 25°C +12hrs at 50°C followed by 3 hrs at 80°C, except in determining Deflection Temperature, where the schedule was 12 hrs at 25°C +12hrs at 50°C + 3hrs at 80°C and 3 hrs at 120°C )

High performance FRP laminates likes pipes, tanks, fumestacks etc Back laminate on Celmar and treated PVC Tooling resins for mould construction

Shipping and Storage

To ensure maximum stability and maintain optimum resin properties, Reversol P-9940 should be stored in closed containers below 32°C and away from heat sources and sunlight. All storage should conform to local fire and building codes. Drums should be stored away from all sources of flame or combustion. Inventory should be maintained at minimum reasonable stock and used on a first-in-first-out basis. When properly stored, Reversol P-9940 will remain stable for 3 months from date of delivery.

Product Security/Health and Safety

Before handling, please read the Safety Data Sheet of this product for advice on safety, use and disposal.

Effluents and Pollution Control

Before handling, please read the Safety Data Sheet of this product for advice on safety, use and disposal.

For further information regarding this product please refer to:

Synthomer Limited Head Office
Phone: +44 (0)1279 436 211
FAX: +44 (0)1279 444 025


Character Value Unit
Appearance Hazy yellow  
Non-Volatile 61 ± 2
Viscosity@ 25 °C - Brookfield #3/6 1,600 – 2,600 cps 
Thixotropic Index 25 °C - LVT, #3 1.1 – 2.0 6 & 60rpm 
Geltime @ 25ºC - - 100g resin + 1.6 ml cobalt octoate (1%) + 2ml MEKP 10 – 15 minute 
Acid Value 36 mgKOH/g 
Specific Gravity 1.10  
Volumetric Shrinkage 8
Tensile Strength 55 MPa 
Tensile Modulus 4486 MPa 
Elongation at Break 1.9
Flexural Strength 85 MPa 
Flexural Modulus 3575 MPa 
Water Absorption 24 hr at 23°C 16.6 mg 
Deflection Temperature (under load 1.80 MPa) 113 MPa 
Barcol Hardness (Model GYZJ 934-1) 47  

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