ISO 8312 pdf download

ISO 8312 pdf download.Rubber compounding ingredients — Stearic acid — Definition and test methods 1 Scope 1.1 This International Standard defines stearic acid (including blends of stearic and palmitic acid) for use as a compounding ingredient in the rubber industry and specifies the test methods for describing its properties. 1.2 Classification of stearic acid and stearic acid/palmitic acid blends according to iodine value and typical chemical and physical properties for such materials for use in the rubber industry are given in annex L. This annex is given for information only. 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. ISO 660:1 996, Animal and vegetable fats and oils — Determination of acid value and acidity . ISO 662:1 998, Animal and vegetable fats and oils — Determination of moisture and volatile matter content . ISO 935:1 988, Animal and vegetable fats and oils — Determination of titre . ISO 1 042:1 998, Laboratory glassware — One-mark volumetric flasks. ISO 3596-1 :1 988, Animal and vegetable fats and oils — Determination of unsaponifiable matter — Part 1 : Method using diethyl ether extraction (Reference method). ISO 3596-2:1 988, Animal and vegetable fats and oils — Determination of unsaponifiable matter — Part 2: Rapid method using hexane extraction . ISO 3657:1 988, Animal and vegetable fats and oils — Determination of saponification value . ISO 3961 :1 996, Animal and vegetable fats and oils — Determination of iodine value . 3 Term and definition For the purposes of this International Standard, the following term and definition apply: 3.1 stearic acid (for use in the rubber industry) a mixture of straight-chain saturated fatty acids composed substantially of stearic acid in the form C 1 7 H 35 COOH and palmitic acid in the form C 1 5 H 31 COOH 4 Sampling Sampling shall be carried out in accordance with ISO 1 5528, using a stainless-steel sampling device. 5 Physical and chemical properties...