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Silopren® LSR 4640

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:	IgXr2R_Silopren-LSR-4640.pdf
PRICE:	Order Products email sales@su-jiao.com

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Message

LSR 4640 is a two-component liquid silicone rubber for injection moulding processes. The material performance is particularly characterised by high reactivity, low viscosity and high tear strength. The LSR 4640 enables particularly the production of parts for healthcare devices covering by USP Class VI such as sealing elements, O-rings, diaphragms, ear plugs, bellows, baby teats, respiratory devices, air vent flaps, tube connectors, catheters and mats.

Key Features and Benefits
Vulcanisates consisting of LSR 4640 are distinguished by the following properties:

Low viscosity

Fast cure

High tear strength

Sterilisable with ethylene oxide, steam and gamma radiation

Long service life at dynamic stress

Neutral odour and taste

High recovery after puncture

High temperature stability

compliance with US Pharmacopoeia XXIII, Class VI (maximum contact time with human tissue 28 days

General Information
Features	Ethylene Oxide Sterilizable Fast Cure Good Tear Strength Good Thermal Stability High Reactivity Low to No Odor Low to No Taste Low Viscosity Radiation Sterilizable Steam Sterilizable
Uses	Connectors Diaphragms Medical/Healthcare Applications Seals
Agency Ratings	BfR Food Contact, Unspecified Rating FDA 21 CFR 177.2600 ISO 10993 USP Class VI
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	45.0	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

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Zythane® 7090A	Alliance Polymers & Services	TPU-Polyether	Zythane®
Yuyao PA 011BG20	Yuyao Tenglong Plastics Co., Ltd.	Nylon 66/6	Yuyao PA