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Cristi M.

28 Aug 2008 12:54



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Celalalt produs din gama Loctite , tot RTV este 5900:

PRODUCT DESCRIPTION
LOCTITE® Product 5900 is a non-slumping, non-corrosive, low odour, low volatile, single component, room temperature vulcanising (RTV) silicone adhesive/sealant.  It has been designed specifically for on line, low pressure tests carried out before product begins to cure.  Product exhibits excellent resistance to automotive engine oils.

TYPICAL APPLICATIONS
Designed primarily for flange sealing with good oil resistance and to withstand high joint-movement requirements.  For example, stamped sheet metal covers (timing covers and oil sumps).

PROPERTIES OF UNCURED MATERIAL
	Typical
	Value	Range
Chemical Type	Oxime Silicone Rubber              	
Appearance	Black	
Specific Gravity @ 20C	1.36	1.34-1.38
Viscosity @ 25C	Thixotropic Paste	
Extrusion Rate gm/min:		
   (3mm nozzle, 6 bar, 25°C)	35	20 to 50
Flash Point (TCC), C	>93	

TYPICAL CURING PERFORMANCE
Skin Over Time
The surface of this adhesive becomes dry to touch on exposure to atmospheric moisture within 15 minutes at 232°C, 505%RH.

Cure speed vs. ambient humidity
The graph below shows shear strength developed with time on aluminium (Alclad) at a bond gap of 0.5mm.  Cure condition 232°C, 605%RH
Electrical Properties
	Constant	Loss
Dielectric constant & loss, ASTM D150,		
          		              @1 kHz	5.05	0.048
             		              @ 100kHz	4.29	0.042
             		              @ 1MHz	4.13	0.023
           		              @ 10MHz	4.12	0.013
Volume resistivity, ASTM D257, .cm		6.70 x 1013
Surface resistivity, ASTM D257, 		4.35 x 1015

Physical Properties		
Hardness, Shore A, ASTM D2240		40 ± 5
Elongation at break, %, ASTM D412		350-550
Tensile strength, ASTM D412		1.5-3.0

PERFORMANCE OF CURED MATERIAL
(After 21 days @ 232°C, 505% RH at 0.5mm gap)
Isopropyl Alcohol wiped substrates
	Typical
	Value	Range
Shear Strength, ASTM D1002, DIN EN 1465		
     Mild steel, N/mm2 	1.2	1.0 to 1.4
(psi)	(150)	(150 to 200)
     Aluminium (T2024), N/mm2	1.0	0.7 to 1.3
(psi)	(150)	(100 to 190)
     Aluminium (Alclad), N/mm2	1.3	1.0 to 1.5
(psi)	(180)	(150 to 220)
     Zinc Dichromate, N/mm2	1.5	1.0 to 2.0
(psi)	(210)	(140 to 280)

La fel, daca aveti nevoie de alte date, le pot pune aici.