scope:

The materials covered by this specification shaii be synthetic resins of the unsaturated polyester type, together with a catalyst and an accelerator (if required) which, when mixed together in accordance with the manufacturer's instructions, shall be suitable for use in the manufacture of glass fibre reinforced laminates.

The resins, to which this specification applies fall into two main types:

Type M-For use where mechanical properties only are of primary importance.

Type E-For use where both mechanical and electrical properties are of primary importance. - Both types are sub-divided, according to the high temperature resistance, into five classes as follows:

Classes M.A. and E,A.-For use at temperatures not exceeding 70°C.

Classes M.B. and E.B.-For use at temperatures not exceeding 90°C.

Classes M.C. and E.C.-For use at temperatures not exceeding 150°C.

Classes M.D. and E.D.-For use at temperatures not exceeding 200°C.

Classes M.F. and E.F.-For use at temperatures not exceeding 260°C.

The type and class required must be stated on all drawings and contracts.

This specification shall be applicable to resin systems as supplied by resin manufacturers. These will include not only unmodified polyester resin systems but also systems which contain thixotropic and/or fireproofing additives, pigments and fillers. These modified systems must comply in all respects with the requirements of this specification.