DS DS/EN ISO 2554
DS DSEN SO 2554 1998-OCT-02 Plastcs - Unsaturated polyester resns - Determnaton of hydroxyl value
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This standard specifies a method for determining the hydroxyl value of unsaturated polyester resins. 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.