SiO2	[%]	49.0
CaO	[%]	42.9
AI2O3	[%]	0.2
Fe2O3	[%]	0.2
K2O	[%]	0,2
Na2O	[%]	0.2
L.o.i.	[%]	6.1
Bulk density	[g/l]	100
Tapped density	[g/l]	160
Av.particle size	[µm]
60
Moisture content	[%]	<3
pH value	[-]	10
Specific surface	[m²/g]	60
Thermal stability	[°C]	750 (Dehydration)
	[°C]	1540 (Melting)

<sup>3. Why PROMAXON®?

PROMAXON® is a very interesting thixotropic agent in epoxy systems because:

- easy to use – less dust
- easy to disperse
- easy for post thixotropizing on site
- no risk for overdispersing
- limited moisture absorption
- heat resistant
- inorganic
- excellent surface appearance
-  avorable price/performace ratio
- excellent stock stability
The performances of PROMAXON® are demonstrated in a number of practical examples, which have been tested in our laboratories.</sup>

<sup>4. Practical examples

High Filled systems :

SHERING RESIN</sup>

^{Schering resin in an epoxy mortar and filled with quartzflour, PROMAXON® D is evaluated in comparison with pyrogenicsilica. With PROMAXON® D it is clear to see that larger particle size is advantageous for this application}

^{High filled epoxy mortar
Mixture}

Europox 776	16.00 %
Eurodur 43	9.60 %
Quartz flour	74.40 %

^{Thixotropic agent}

PROMAXON® D	2.00 %
Pyrog. Silica	7.50 %

<sup>anti sag test in U-profiles 11*12 mm addition for non sag

HOECHST</sup>

^{Hoechst – resin in an epoxy mortar. An hydrophobic pyrogenic silica is compared to PROMAXON®. A relatively low concentration is needed to obtain an anti sag situation for PROMAXON®.}

^{High filled mortar}

Mixture

Beckopox EP 117	50.0 parts
Beckopox hardener	10.0 parts
Quartz flour W2	60.0 parts
Quartz sand 7- 1.2 mm	118.5 parts

Thixotropic agent

PROMAXON® D	4.0 parts
Pyrog. Silica (hydrophobic)	3.0 parts

<sup>anti sag test in U-profiles 11*12 mm addition for non sag


Filled Systems:

HOECHST RESIN</sup>

^{Waterbased epoxy coatingHoechst-resin in a waterbased epoxy coating used to paint concrete surfaces. Comparing an addition of 2 pph PROMAXON® D with 1 pph pyrogenic Silica, a higher viscosity level is achieved at lower speed. The STI is increased resulting in a comparable viscosity at higher speed.}

Componant A

Beckopox hardener EH 623	136.0 parts
TiO2 RN59	91.0 parts
Iron oxide black	12.5 parts
EWO-weiss normal	76.0 parts
Micro-talc ATI	54.0 parts
additol XW 393	3.5 parts
additol XW 393	1.5 parts
water	50.0 parts

 
Alter dispersion:

isopiopanol	37.5 parts
water	132.0 parts

 
Component B

Beckopox EP 122	91.0 parts
Beckopox VEP 2281	242.0 parts
Water	67.0 parts

 
Ratio A/B: 60/40

Thixotropic agent	PROMAXON® D	pyrog. silica
Comp A	2 pph	1 pph

Brookfield viscosity
Comp A + B

1 rpm	8.000	6.000
10 rpm	1.860	1.500
STI 1/10	4.3	4.0

^{4. Stockability
The stockstability of an epoxy mixture, containing PROMAXON® as thixotropic agent, is measured during a period of 2 to 3 months.
After thixotropising the A components, the mixtures were stored for a certain period of time, whereafter the anti sag effect was determined in U-profiles for the mortars and with the driptest for the coatings.}

^{SIKA CHEMIE
Sika Chemie: Icosit 255, thixotropised with 4,5 pph PROMAXON® D, shows no sag after the two months test period:}

Product: Icosit 255 – Sika Chemie - Epoxy coating
Thixotropic agent: PROMAXON® D - 4.5 pph
Anti sag test drip test: 1 mm thick coating on glas sheet

intitial	0 mm
1 day	0 mm
1 week	0 mm
2 weeks	0 mm
1 month	0 mm
2 months	0 mm

<sup>5. Test Methods
Anti-sag test drip test
In order to compare different thixotropic agents in filled systems, a so called drip test is carried out. Here a coating is applied on a glass sheet, using a filmograph of which the clearance is regulated at 1.35 mm, this in order to obtain a 1 mm layer. Immediately after application the glass sheet + coating is installed vertically and the sag is evaluated after hardening. The result is expressed in parts per hundred (pph), calculated on the entire composition, of the thixotropic agent needed to obtain a non sag situation. When stockstabitlityncerned the value of sagging is noted.

Anti sag test in U-profiles
In the U-profile anti sag test high filled systems for thick layer application are evaluated. The principle is the same test, the result is expressed in pph thixotropic agent needed to obtain a non sag situation. When stockstability is concerned the value of the sagging is noted. Therefore half a U-profile (11*12 mm) is filled with the mixture. This is installed vertically with the empty side below in order to create the possibility to sag down. After hardening the sag is evaluated.</sup>