ISO 2554:1997 PDF

Scope: This International Standard specifies a method for determining the hydroxyl value of unsaturated polyester resins. In fact, this method determines the difference between the hydroxyl value and the acid value; it is therefore necessary to determine the total acid value separately, in order to calculate the hydroxyl value. NOTE 1 The hydroxyl value of saturated polyester resins (for example, polyester resin used for the manufacture of polyurethanes and polymeric plasticizers) and of certain types of alkyd resins may also be determined by this method.

ISO 2554:1997 history

1997 ISO 2554:1997 Plastics - Unsaturated polyester resins - Determination of hydroxyl value
1974 ISO 2554:1974 Plastics; Unsaturated polyester resins; Determination of hydroxyl value