Standard Test Methods for Softening Point of Resins Derived from Pine Chemicals and Hydrocarbons, by Ring-and-Ball Apparatus

Importancia y uso:

3.1 In general, with materials of these types, softening does not take place at a definite temperature. As the temperature rises, these materials gradually change from brittle or exceedingly thick and slow-flowing materials to softer and less viscous liquids. For this reason, the determination of the softening point must be made by a fixed, arbitrary, and closely defined method if the results obtained are to be comparable.

3.2 In these test methods, the softening point is defined as the temperature at which a disk of the sample held within a horizontal ring is forced downward a distance of 25.4 mm (1 in.) under the weight of a steel ball as the sample is heated at 5 °C/min in a water, glycerin, silicone oil, ethylene glycol/water or glycerin/water bath.

3.3 The automatic method was chosen to be the reference method because a round robin demonstrated that it gave more precise results than the manual method.

Subcomité:

D01.34

Referida por:

D0804-12R22, D1566-21A, D0509-20, D6493-11R22, D6090-23, B0032-20, D3642-13R21, D8584-24, E1823-24C, D4676-94R21, D4730-13R20

Volúmen:

06.03

Número ICS:

87.060.20 (Binders)

Palabras clave:

polyterpene resins; ring and ball; rosin; softening point;