Reversol P-9631 is an orthophthalic promoted clear unsaturated polyester resin specially developed for the manufacture of transparent sheet by machine or hand-lay methods. It is also suitable for contact moulding of flat section, casting etc. It is designed for curing with Methyl Ethyl Ketone Peroxide (MEKP) as catalyst.

Available Documents

TDS Download

Technical Informations

Application Advice/Typical Applications

(# Test method as in BS-2782 : 1976 ; 24 hrs 20ºC + 3 hrs 80ºC. For Deflection Temperature post cured further at 120ºC @ 3 hrs)

Transparent roof sheets Decorative panels and laminates Casting

Shipping and Storage

To ensure maximum stability and maintain optimum resin properties, Reversol P-9631 should be stored in close containers maintained below 32ºC 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 level on first-in-first-out basis. When properly stored, Reversol P-9631 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 Light bluish  
Non-Volatile 64 ± 2
Viscosity@ 25 °C - Brookfield #3/60 250 – 450 cps 
Geltime @ 25°C -1% MEKP 18 – 23 minute 
Clarity Clear  
Acid Value 50 mgKOH/g 
Specific Gravity 1.11  
Volumetric Shrinkage 6
Tensile Strength 49 MPa 
Tensile Modulus 4632 MPa 
Elongation at Break 1.3
Water Absorption 24 hr at 23°C 16.9 mg 
Deflection Temperature (under load 1.80 MPa) 73 °C 
Barcol hardness (Model GYZJ 934-1) 50  

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