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The recommended dose of BLUESIL ADD 720 is 5 % with respect to the HCR pre-catalysed compound. It is easily added on a 2-roll mill.

Comments: With transparent HCR compounds opacification may occur. Furthermore, BLUESIL ADD 720 may slightly lower the tensile strength of cured silicone compounds (by between approx. 0.5 to 1 MPa).

Example: The following tables give the change in mechanical properties for MF 135 U and
MF 175 U obtained after ageing for 70 hours at  150 °C in ASTM oils 1 and 3. These values are measured after adding 2-4 dichloro benzoyl peroxide with 50 % active ingredients (Peroxide E) and curing for 8 minutes at 115 °C and post-curing the test slabs for 4 hours at 200 °C.

Resistance to ASTM Oil n°1

PropertiesVariation in properties after immersion for 70 h at 150 °C
MF 135 UMF 175 U
Control5 %
ADD 720
Control5 %
ADD 720
Shore A hardness, points– 5– 5+ 3– 2
Tensile strength, Mpa– 37– 24– 39– 21
Elongation at break, %– 23– 7– 53– 9
Variation in volume, %+ 4+ 5+ 2+ 3

 

Resistance to ASTM Oil n°3

PropertiesVariation in properties after immersion for 70 h at 150 °C
MF 135 UMF 175 U
Control5 %
ADD 720
Control5 %
ADD 720
Shore A hardness, points– 25– 17– 26– 23
Tensile strength, Mpa– 75– 68– 58– 44
Elongation at break, %– 32– 25

– 53

– 31
Variation in volume, %+ 60+ 50+ 44+ 37

BLUESIL ADD 720 储存温度介于 -5°C / 23°F 和 30°C / 86°F 之间时,从生产日期开始产品保质 18 个月

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BLUESIL ADD 720

Ivory coloured paste.

保护

高温胶添加剂

BLUESIL ADD 720 is an agent designed to improve the resistance of heat cured silicone elastomers to ASTM Oil n° 1, 2 and 3 and to motor oils, both for short and prolonged periods.

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密度1.63Monocompg/cm3

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