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Silopren® LSR 2640

Category:	Silicone Rubber, LSR , Silicone Rubber, LSR
Manufacturer:	Momentive Performance Materials Inc.
Trademark:	Silopren®
Fillers:	-
Ports:	Qinzhou, Shekou, Shanghai, Ningbo
Delivery Terms	FOB, CIF, DAP, DAT, DDP
PDF:	ePqURt_Silopren-LSR-2640.pdf
PRICE:	Order Products email sales@su-jiao.com

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Silopren LSR 2640 is a two-component liquid silicone rubber for injection molding processes. In comparison to Silopren LSR 2040, Silopren LSR 2640 shows a lower viscosity, improved tear resistance and a higher reactivity. Therefore, it is also possible to reduce the vulcanization temperature while maintaining a standard crosslinking rate. The increased reactivity does not affect the properties of the vulcanizate.

Key Features and Benefits
Vulcanizates of Silopren LSR 2640 are typically distinguished by the following properties:

High reactivity, lower viscosity, shorter cycle time

Excellent thermal stability

Biocompatible

Sterilizable with ethylene oxide, steam and gamma radiation

High stability and flexibility at low temperatures

Good rubber-like properties, high tear resistance

Long service life at dynamic stress

High stability to ozone and ultraviolet light

Outstanding resistance to aging

Excellent dielectric behavior over a wide range of temperatures

Not readily combustible, does not melt or drip

Easily pigmentable with LSR color pastes

KTW approved

Potential Applications
Because of its outstanding properties, Silopren LSR 2640 is an excellent candidate to consider for the following elastomeric articles:

Sealing elements

O-rings

Stoppers

Diaphragms

Keypads

Bellows

Catheters

Pacifiers

Baby teats

Respiratory devices

Vibration dampers

Air vent flaps

Switch cover

Breast shields

Nose pads

Cable connectors

Parts of medical technical equipment

General Information
Features	Biocompatible Ethylene Oxide Sterilizable Good Colorability Good Stability Good Tear Strength Good Thermal Stability Good UV Resistance High Reactivity Low Temperature Flexibility Ozone Resistant Radiation Sterilizable Steam Sterilizable Vibration Damping
Uses	Connectors Diaphragms Medical/Healthcare Applications Pacifiers Seals
Agency Ratings	BfR Food Contact, Unspecified Rating DVGW W270 FDA 21 CFR 177.2600 ISO 10993 KTW Unspecified Rating USP Class VI WRAS Unspecified Rating
Forms	Liquid
Processing Method	Injection Molding

Physical	Nominal Value	Unit	Test Method
Density	1.12	g/cm³	DIN 53479

Hardness	Nominal Value	Unit	Test Method
Durometer Hardness (Shore A)	42		DIN 53505

Elastomers	Nominal Value	Unit	Test Method
Tensile Strength	8.00	MPa	DIN 53504
Tensile Elongation (Break)	600	%	DIN 53504
Tear Strength ¹	40.0	kN/m	ASTM D624
Compression Set (175°C, 22 hr)	25	%	DIN 53517

Thermoset	Nominal Value	Unit	Test Method
Thermoset Components
Part A	Mix Ratio by Weight: 1.0
Part B	Mix Ratio by Weight: 1.0
Post Cure Time (200°C)	4.0	hr

Additional Information	Nominal Value	Unit	Test Method
Vulcanization (175°C)	10.0	min

Uncured Properties	Nominal Value	Unit	Test Method
Color
-- ²	Translucent
-- ³	Translucent
Viscosity			DIN 53018
20°C ⁴	350	Pa·s
20°C ⁵	350	Pa·s
Pot Life (20°C)	4300	min

Note Message
1 .	Die B
2 .	Part B
3 .	Part A
4 .	Part B
5 .	Part A

Resin Grade	Manufacturer	Category	Trademark
MAXAMID™ EPDM66G33-BK09	Pier One Polymers, Inc.	Nylon 66	MAXAMID™
RTP 4782	RTP Company	PTT	RTP
Starflam BFR330A	Eurostar Engineering Plastics	Nylon 6	Starflam
Vyncolit® SI 9041	Vyncolit N.V.	Silicone	Vyncolit®
Blendfor® A 8000/V0 BIANCO 0369	SO.F.TER. SPA	PC+ABS	Blendfor®