Momentive Performance Materials Silopren™ LSR 2645 Custom Liquid Silicone Rubber

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Momentive Performance Materials Silopren™ LSR 2645 Custom Liquid Silicone Rubber - Infant Care
Categories:	Polymer; Thermoset; Rubber or Thermoset Elastomer (TSE); Silicone; Silicone Rubber; Liquid Silicone Rubber (LSR)
Material Notes:	This LSR elastomer is a specialty grade, two-component, platinum (addition/heat) curable, and pumpable silicone elastomer that can be molded and cured with very fast cycle times, at elevated temperatures. The molding process allows for complex part geometry and exact dimensions. LSR elastomers are generally suitable for short cycle time injection and full automatic flash-less processing. Color pastes are available to pigmenting addition cure productions of LSR's. All LSR grades are platinum cured materials which are mixed in a 1:1 ratio by weight. Industries and Applications: The Momentive portfolio of products is used for a wide variety of applications in the Automotive, Aviation and Aerospace, Consumer Goods, Consumer Electronics, Healthcare and Energy Industries. LSR 2645 is a Custom Infant Care grade LSR.
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Physical Properties	Original Value	Comments

Specific Gravity	1.14 g/cc
Linear Mold Shrinkage	0.027 cm/cm	vulcanized 10 sec at 200°C; Without post-cure
	0.035 cm/cm	vulcanized 10 sec at 200°C then post-cured

Mechanical Properties	Original Value	Comments
Hardness, Shore A	47
Tensile Strength	11.0 MPa
Elongation at Break	700 %
Tear Strength	42.0 kN/m	Die B
Compression Set	25 %	Post cured

Optical Properties	Original Value	Comments
Transmission, Visible	80 %	transparent; thickness unknown

Processing Properties	Original Value	Comments
Nozzle Temperature	20.0 °C	cool nozzle and cylinder to prevent premature vulcanization
Mold Temperature	140 - 230 °C	short vulcanization time required (a few seconds)
Injection Pressure	5.00 - 15.0 MPa	depends on feed channel
Hold Pressure	5.00 MPa

Compliance Properties	Original Value	Comments
FDA	Yes	FDA Indirect food contact - Rubber articles intended for repeated use - FDA Reg 21CFR177.2600

Descriptive Properties
Appearance	Transparent
BfR	product is compositionally compliant	Recommendation XV Silicones; post cured (4h/200°C)

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