| IDENTIFICATION OF THE PRODUCT |
|
| Formulated
on the basis of polysiloxanes and polysilicic acid sodic
salts. |
| APPLICATIONS |
|
| Impregnation of porous materials so as to reduce
permeability and increase mechanical strength. |
| OPERATING PRINCIPLE |
|
|
The
"IMPREX" product penetrates porous areas and, following
a chemical reaction, becomes an elastic product that is
insoluble in water or other solvents, which anchors to
the walls of the pores of the impregnated material,
through interfacing chemical reactions |
 |
Following
heating, three cases may take place:
1. The thermal
expansion coefficient of the "IMPREX" product is equal to that
of its impregnated support;
2. The thermal expansion
coefficient of the "IMPREX" product is lower than that of the
support;
3. The thermal expansion coefficient of the
"IMPREX" product is greater than that of the support.
|
| RELEASE OF SUBSTANCES |
|
Especially
performed analyses concerning the release of harmful
substances following impregnation, on small burners for coffee
makers (Gaggia) have given the following results:
global
migration
(Test at 80°
C)
Lower than 0.5 mg/dm2
|
global migration
(Test at 120° C)
Lower
than 0.5 mg/dm2 | On the
basis of the global migration test carried out according to
procedures specified in the DM21 of March 1973 and in
consideration of the values obtained, the sample was
determined to be suitable for its proposed use. |
| CHEMICAL-PHYSICAL CHARACTERISTICS
|
| ASPECT |
|
| Dense, odourless, oily liquid, almost limpid, green in
colour. Stable for an undetermined period of time, if stored
in a closed container. |
| MISCIBILITY WITH WATER |
|
| In all
ratios. |
| SOLID CONTENTS
|
|
| approximately 470 g/l |
| PH |
|
| 10,8 - 12
tq solution |
| BOILING POINT
|
|
| 102 - 104°
|
|
| VISCOSITY AT 20° |
|
| 200 - 400
mPa x s.approximately. |
| TEMPERATURE OPERATING RANGE |
|
| -60° +700°
following impregnation. |
| RESISTANCE TO PRESSURE |
|
| Until
breakage of the treated support. |
| CARBONISATION TEMPERATURE |
|
| Does not
carbonise, is inert and
inorganic. |
