Среды лакокрасочные. Титриметрический метод определения гидроксильного числа
Название (англ.):
Paint media; Determination of hydroxyl value; Titrimetric method
Описание (англ.):
The free hydroxyl groups may be present as polyhydric alcohols, partial esters, polyester end groups or hydroxylated fatty acids. The method of test is not applicable to resin containing both hydroxyl groups and epoxide groups, because the latter will also be attacked and included in the result. The principleconsists in acetylation of the groups with anhydride, hydrolysis of the exess acetic anhydride and titration of the resulting acetic acid with potassium hydroxide solution, either in the presence of a colour indicator or potentiometrically. The method is not applicable to cellulose nitrate or phenolic resins.
Заменён стандартами:
ISO 4629(1996.06)
Дата введения:
01.11.78
Дата отмены:
01.06.96
Код КГС:
Л29
Код ОКСТУ:
2310;2309
Код ОКС(МКС):
87.060.20
Код ОКП:
2310;2309
Нормативные ссылки:
DIN ISO 4629-1979, EQV*ELOT 577-1986, EQV*NF T30-403-1976, NEQ*NP-2054-1983, EQV*BS 6782 PART 4(1987/BSI), EQV
Ключевые слова:
ACETIC ACID ANALYSIS BINDERS (MATERIALS) BINDING AGENTS BURETTES CHEMICAL ANALYSIS CHEMICAL ANALYSIS AND TESTING CONICAL FLASKS COOLERS DEFINITIONS DETERMINATION OF CONTENT ETHYL ACETATE FATTY ACIDS HYDROLYSIS HYDROXYL VALUE INSTRUMENTS MATHEMATICAL CALCULATIONS MIXTURES PAINTS PIPETTES PYRIDINE SAMPLES TEMPERATURE TITRATION TOLERANCES (MEASUREMENT) TOLUENE VOLUMETRIC ANALYSIS ANALYSIS BINDERS : MATERIALS CHEMICAL ANALYSIS AND TESTIN TOLERANCES : MEASUREMENT