Silicone rubbers for zinc alloys

in stock

ATOS BESANA s.r.l. produces different types of high quality and high temperature resistance silicone rubbers realised through a very equipped analysis laboratory for a continuous research and development of our products as the market requires and modern technologies.

We can group the different silicone rubbers in four families:

Silicone rubbers for zinc alloys (THT series with very high resistance to the temperature);
Silicone rubbers for lead/tin/bismuth alloys (MEX series);
Silicone rubbers for resins (with low vulcanisation temperature);
Silicone rubbers for lost wax (MCF series).

The standard vulcanisation temperature is normally 175/180°C but all our silicone rubbers can be realised at 120°C or 80/90°C on request.

The advantage of lower vulcanisation temperature is a lower shrinking during the vulcanisation cycle as well as the possibility to use resin, plastic, wood and wax models which normally have deformations and broking for higher vulcanisation temperature and pressure. See the following technical label :

VULCANISATION TEMPERATURE	VULCANISATION TIME	SHRINKING	SUGGESTION
175/180 °C	2 – 2,5 minutes for each mm. of thickness	3,0-4,0%	Standard vulcanisation pressure
120 °C	2,5 – 3 minutes for each mm. of thickness	2,0-2,5%	Low vulcanisation pressure
80/90 °C	3 – 3,5 minutes for each mm. of thickness	0,5-1,0%	Low vulcanisation pressure

Available besides a big range of casting and moulding accessories.

Description

COLOUR	HARDNESS SHORES	APPLICATION	VULCANISATION TEMPERATURE
WHITE I 40 FOR INSERT	40 ± 2	Very high elongation, it is used like fixed/mobile insert in the harder rubber for very undercut pieces (supplied in roll or bulk)	180°C (on request 80/90°C or 120°C)
GP/AT HTM	51 ± 2	Very high elongation, it is used for very undercut pieces	180°C (on request 80/90°C or 120°C)
GREEN HTM	56 ± 2	High elongation, it is used for very undercut pieces, high resistance to the temperature	180°C (on request 80/90°C or 120°C)
BLUE HTM	58 ± 2	Good elongation, it is used for high undercut pieces, high resistance to the temperature	180°C (on request 80/90°C or 120°C)
YELLOW HTM	60 ± 2	Medium elongation, it is used for undercut pieces, high resistance to the temperature	180°C (on request 80/90°C or 120°C)
LIGHT-BLUE HTM	62 ± 2	Medium elongation, it is used for low undercut pieces, high resistance to the temperature	180°C (on request 80/90°C or 120°C)
PINK HTM	65 ± 2	Low/medium elongation, it is used for flat pieces with some details, high resistance to the temperature	180°C (on request 80/90°C or 120°C)
ORANGE HTM	66 ± 2	Low/medium elongation, it is used for flat pieces with some details, high resistance to the temperature (dryer than PINK THT)	180°C (on request 80/90°C or 120°C)
WHITE 65/2 HTM	66 ± 2	Low elongation, it is used for flat pieces and buckles, high resistance to the temperature	180°C (on request 80/90°C or 120°C)
IVORY HTM	71 ± 2	Very low elongation, it is used for very flat pieces, high resistance to the temperature	180°C (on request 80/90°C or 120°C)
WHITE SD HTM	78 ± 2	Very hard, it is used only for very flat pieces, high resistance to the temperature	180°C (on request 80/90°C or 120°C)