ADS H302

ADS H302 is a medium / high molecular weight, solid polyvinyl acetate, developed for use in unsaturated polyester composites. ADS H302 is a carboxylated polymer which achieves efficient compound thickening, very low shrinkage and excellent mould release.



Rapidly dissolves in most organic solvents including styrene

High thickening efficiency

Excellent solution stability

No shrinkage

High gloss


ADS H302 is manufactured on a dedicated polymerisation plant and is produced in the form of colourless beads.

Available Documents

TDS Download

Technical Informations

Application Advice/Typical Applications

Dissolving - ADS H302 is soluble in many organic solvents such as esters, ketones and lower alcohols. ADS H302 is however designed for dissolution in styrene. ADS H302 should be added carefully to the solvent system under sufficient agitation to ensure dispersion of the polymer beads. Styrene solutions of ADS H302 should be stored in appropriate air tight containers, and should incorporate an inhibitor to extend storage stability.
Compatibility - ADS H302 is compatible with other M Grade polymers, and can be mixed in any proportion to modify either solution or dry properties. In common with other Synthomer M grades, ADS H302 can be plasticised with many types of plasticiser to modify film properties. Further details are available on request.

All types of SMC, BMC & Pultrusion

Shipping and Storage

ADS H302 is a thermoplastic solid. To prevent sticking of the polymer beads the product should be stored in dry conditions, below +20 °C (+68 °F) out of direct sunlight. Pallets should not be stacked. Under these conditions the product has a storage life of at least 12 months from date of delivery. Product which has been stored for longer than 12 months should be tested before use. ADS H302 is supplied in 25kg paper sacks each marked with the grade reference and batch number. The minimum order quantity is 1000kg on a stretch wrapped pallet.

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:

McInnes, Malcolm
Phone: +44(0)1279 436211


Character Value Unit
Total Solid Content >99.0
Viscosity 20% in ETAc @ 20°C 45 - 65 mPa.s 
Acid number 5.0 - 7.0 mg KOH/g 
Typical viscosity 40% in styrene @ 23°C 4500 - 7500 mPa.s 
Typical viscosity 40% in styrene @ 25 °C 4000 - 7000 mPa.s 
Typical water content 0.75 max
Appearance Solid, colourless beads  

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