Oligomerisation products of 2,2'-[(1-methylethylidene)bis(4,1-phenyleneoxymethylene)]bisoxirane with acrylic acid and fatty acids, C18-unsatd., dimers and nonanoic acid

Viscosity

Link to relevant study record(s)

Reference

Endpoint:

viscosity

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2014

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

equivalent or similar to guideline

Guideline:

OECD Test Guideline 114 (Viscosity of Liquids)

Principles of method if other than guideline:

The viscosity of the liquids was measured using a stress-controlled rotational rheometer (Paar-Physica UDS 200) fitted with a concentric cylinder system.

Type of method:

other: stress-controlled rotational rheometer

Specific details on test material used for the study:

Lot #JBKF0002R

Key result

Temp.:

other: 23°C

Parameter:

other: Pa.s

Value:

835

Results:

Sample #	Viscosity at 1 s^-1	Viscosity at 10 s^-1	Viscosity at 20 s^-1	Viscosity at 100 s^-1	Temperature
	Pa-s	Pa-s	Pa-s	Pa-s	°C
Test substance 1	856	850	835	-	23.0
Test substance 2	4.24	4.23	4.23	4.22	60.0

Conclusions:

Under the study conditions, the viscosity of the test substance was determined to be 835 Pa.s (shear rate = 20 s-1) at 23°C.

Executive summary:

A study was conducted to determine the viscosity of the test substance using a stress-controlled rotationl rheometer (method similar to OECD Guideline 114). Samples with low viscosities were measured with a double-gap system whereas high viscosity liquids were measured with a cone plate or single gap device. A few measurements were conducted over a shear rate range between 1 and 100 s^-1. When the flow is Newtonian (i.e. the viscosity is independent of shear rate), which is usually the case for acrylate resins, the viscosity is returned at 20 or 100 s^-1. The temperature was 23.0 °C and was controlled within 0.1°C. Under the study conditions, the viscosity of the test substance was determined to be 835 Pa.s (shear rate = 20 s-1) at 23°C (Herssens, 2014).

Description of key information

The viscosity was determined according to OECD Guideline 114 (Herssens, 2014).

Key value for chemical safety assessment

Viscosity:

835 mPa · s (dynamic)

at the temperature of:

23 °C