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Melting point / freezing point

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Reference
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
22-25 February 2010
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: The study was not carried out using GLP. The results were carried out once on one sample, and the results were as expected.
Qualifier:
according to
Guideline:
other: ISO 11357-2
Deviations:
no
Principles of method if other than guideline:
A small sample of the epoxy resin was placed in a small capsule. The temperature of the sample was scanned versus an empty capsule. The difference in the heat required to increase the temperature of a sample and reference was measured as function of temperature was used to determine the glass transition temperature of the resin.
GLP compliance:
no
Type of method:
thermal analysis
Melting / freezing pt.:
ca. -16 °C
Remarks on result:
other: The measurement was carried out on this substance using thermal analysis - a differential scanning calorimeter (DSC). The melting point is a glass transition temperature (Tg).

Sample                                                                                              Mass, mg              Tg, °C

4,4'-Isopropylidenediphenol, oligomeric reaction products with                     11.43                    -16

1 -chloro-2,3 -epoxypropane, CETA 4/10(IPDP)

 

Conclusions:
The glass transition temperature (Tg) of EPIKOTE 828-LVEL was measured by differential scanning calorimetry and found to be -16°C.
Executive summary:

A typical product EPIKOTE(TM) 828 -LVEL described using EC number 500 -033 -5 is not a pure substance and therefore does not have a freezing point. Thermal analysis was carried out on this typical product and the glass transition temperature was found to be -16°C.

Description of key information

The substance 4,4'-Isopropylidenediphenol, oligomeric reaction products with 1-chloro-2,3-epoxypropane (EC No. 500-033-5) has a variable molecular weight range. The majority of the substance is a viscous liquid with a glass transition temperature (Tg) of ca. -16°C. 

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
-16 °C

Additional information

The substance 4,4'-Isopropylidenediphenol, oligomeric reaction products with 1-chloro-2,3-epoxypropane (EC No. 500-033-5) has a variable molecular weight range. The majority of the substance is a viscous liquid with a glass transition temperature (Tg) of ca. -16°C. During storage crystallization of the diglycidyl ether of bisphenol-A often occurs. Bisphenol-A diglycidyl ether melts at a temperature between 30 and 50°C.