Gel Time Measuring Instruments

B-Timing Plate

B-Time determination on the B-Timing Plate provides information on the curing behavior of resins capable of heat-hardening, namely the reaction time at a given temperature after which resins (solid, liquid, or solvent-containing resins of a known concentration) change to the B-state. This B-Timing Plate according to DIN 16 916 is mainly used for Phenolic resins.

Our standard B-Timing Plate has four depressions in the heating plate, accepting one sample each. Plates without depressions are also available. The temperature is precisely controlled with our temperature controller TC-3.

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Heating Block PL

GEL TIME DETERMINATION OF POWDER COATINGS
According to DIN 55 990, the gel time of powder coatings is the time required to melt a specimen at a laid down temperature, using a specific test apparatus, and to achieve a gel - like consistency.

For the determination of the gel time of powder coatings, our Heating Block PL in accordance with the German Standard DIN 55 990 (ref. 30.45) with a spherical depression (mould) is used.

The temperature is precisely controlled with our temperature controller TC-3.

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GELNORM ® - GEL TIMER TC

The automatic GELNORM®-Gel Timer TC for the measurement of gelation time under standardised conditions is easy to use and the results show exceptionally good reproduceability with all reaction resins such as:

  • unsat. Polyester resins Epoxid resins
  • Polyurethane resins
  • Acrylic resins
  • Silicone resins etc.

The instrument incorporates a switch-off mechanism that responds to pressure: the gelation time limit is reached when the measuring stamper meets a defined reaction force in the reaction resin. As a result of this automatic switch-off system, the size of resin sample employed is not limited. The disposable stamper of stainless steel wire carries out a defined reciprocating movement as soon as the instrument is set in operation and, when the change in viscosity is reached, a built in timer is stopped and the gelation time can be read off.

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GELNORM ® - THERMBOX

THE SOFTWARE OF GELNORM® THERMBOX
A GELNORM® – Therm-Box 1 – 3 can be connected to the control unit.

The gel time as well as the change of temperature inside the probe can be recorded by means of a line recorder.

(Please note, that only one GELNORM-Therm-Box can be connected to each control unit.)

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GELNORM ® - DE

GELNORM® - DE is a novel measuring instrument for establishing the curing reaction of two-component reaction resin systems (thermoset resins). The new instrument is based on the determination of a function of electical conductivity as well as the capacitance of a resin sample. This electrical function enables to trace the curing process over the whole regime of the chemical reaction. The electric function as determined with GELNORM - DE is inversely proportional to the viscosity of a polymer sample. Hence, the instrument provides new possibilities to investigate the curing reaction of reaction resins such as:

  • Epoxy resin
  • Silicone rubbers
  • Polyurethane resins
  • Polysulphide rubbers
  • Polyester resins

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GELNORM ® - GEL TIMER

With GELNORM - Gel Timer it is possible to evaluate all factors which influence the gel time of reaction resins such as type and quantity of hardener, accelerator, inhibitor, filler, pigments, as well as temperature and moisture. The instrument is extremely easy to operate and normally needs no maintenance.

The principle of measurement of GELNORM - Gel Timer is simple: A stamper made from aluminium or glas performs an up-down cycle in a thermostatized test tube filled with resin. When the point of gelation is reached, the test tube is pulled up by the stamper. This stops the clock which was started at the beginning of the experiment and the gel time can be read of.

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GELNORM ® - MED

GELNORM® - MED is a measuring instrument for the hard setting sequence of two component systems, which either have a high initial viscosity or in which the viscosity rises to very high values during the hard setting process. The instrument is also suitable for systems that have a filler type starting viscosity: the viscosity of such systems cannot be measured with conventional rotational viscometers.

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GELNORM ® - PVN 1

The Gelnorm PVN-1 equipment consists of a control unit, a stand and a motor driven test rod.

The instrument is used to measure the gel time with two methods based on DIN EN ISO 2535.

When method 3 is selected the curing process can be monitored whilst the test stress is built up, which can be done either continuously or in a series of pulses – as on the earlier model RVN.
 

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