Datasheet for SE4524U/America/eng, revision no 1

SE4524U

High Strength, Translucent
Silicone Rubber Compound

Product Description

SE4524U is a 50 durometer high strength translucent silicone rubber compound.

Key Performance Properties

High tear compound
Uniform properties with various curing agents
Translucency

Applications

SE4524U, when properly catalyzed, has been used for applications requiring translucency, inertness, and durability. SE4524U has also been used for rubber parts intended for use in contact with food. (See statement under Food Use Status).

Typical Product Data

Typical Properties of Uncured Compound

Property	SE4524U
Specific Gravity	1.15+/-0.03
Appearance	Translucent
Polymer Classification (ASTM D-1418)	VMQ

Specifications

Typical product data values should not be used as specifications. Assistance and specifications are available by contacting Momentive Performance Materials at 800/255-8886.

FOOD USE STATUS

The components of SE4524U have been selected to comply with FDA Food Additive Regulations, section 177.2600. Processing of this raw material into finished articles will affect the extractability of its components. It is the responsibility of the manufacturer of the finished articles to insure that the performance standards specified in the regulation (177.2600) are met.

Instructions for Use

The following properties were obtained on compression molded 0.075 inch ASTM sheets of SE4524U. The curing agent quantity level is based on 100 parts by weight of compound.

Typical Properties of Cured Compound

ASTM TEST METHOD	PROPERTY	TYPICAL VALUES
	Formulation of Test Specimens
	Curing Agent Type:	Bis (2,4 Dichloro- benzoyl) Peroxide 50% Active	2,5 DiMethyl-2,5 Di(t-butyl-peroxy) Hexane 50% Active
	Curing Agent Level:	1.2	0.6
	Press Cure:	10 min. @ 127°C	10 min. @ 175°C
	Post Cure:	4 hrs. @ 200°C	4 hrs. @ 200°C

	Physical Properties
D-2240	Hardness, Durometer A	50	50
D-412	Tensile Strength, psi (Mpa)	1300 (9.0)	1290 (8.9)
D-412	Elongation, %	600	650
D-624	Tear Resistance, Die B, ppi (KN/m)	210 (36.8)	180 (31.5)
D-395	Compression Set, % 70 hrs. @ 100C	14	15
	70 hrs. @ 150C	30	31
D-412	Tensile Modulus @ 100% elongation, psi (Mpa)	230 (1.6)	150 (1.0)

Instructions for Use

D-2632	Resilience, %	48	45
D-2137-A	Brittle Point, °C	-90	-90
D-813	Crack Growth @ 25C flex cycles	> 150,000	> 150,000
	Linear Shrinkage, %	3.1	4.1
	Heat Age, 70 hrs. @ 205C
	Shore A, points change	+3	+4
	Tensile, % change	-9	-10
	Elongation, % change	-21	-25
	Tear, % change	-8	-9
	Water Resistance, 7 days @ 100C
D-471	Shore A, points change	+1	+2
	Tensile, % change	+3	+2
	Tear, % change	+1	+1
	Volume, % change	+1	+1
	Steam Resistance, 7 days @ 20 psi
D-380	Shore A, points change	-1	+2
	Tensile, % change	-3	-2
	Elongation, % change	-4	-5
	Tear, % change	-5	-4
	Volume, % change	+1	+1
	Food Related Resistance	Shore A Change	% Volume Change
D-471	Coffee 7 days @ 80C	+2	+1
	Cola Syrup 7 days @ 25C	NIL	1
	Vegatable Oil 7 days @ 150C	-3	-5
	Beer 7 days @ 25C	NIL	1
	Milk 3 days at 5C	NIL	1
	Lard 3 days @ 150C	-3	-5

Instructions for Use

Typical Curing Agents

Peroxides	Commercial Grades	Form	%	Typical Molding Temperatures	Recommended Use
Bis (2,4 Di-chlorobenzoyl Peroxide	Perkadox¹ PD50-S	50% Active Paste	1.6	104-132C (220-270F)	Hot Air Vulcanization
Benzoyl Peroxide	CADOX¹ BS or LUPERCO² AST	50% Active Paste	1.0	116-138C (240-280F)	Molding, Steam Curing
DiCumyl Peroxide	DI-CUP³ 40C	40% Active Powder	1.0	154-177C (310-360F)	Molding Thick Sections, Bonding, Steam Curing
2,5 DiMethyl 2,5 Di(t-butyl Peroxy) Hexane	VAROX⁴ or LUPERCO²101-XL	50% Active Powder	1.2	166-182C (330-360F)	Molding Thick Sections, Bonding, Steam Curing

CURING AGENT SUPPLIERS
¹ Perkadox and Cadox are registered trademarks of Akzo Chemical
² Luperco is a registered trademark of Atochem North America
³ Di-Cup is a registered trademark of Hercules, Inc.
⁴ Varox is a registered trademark of R.T. Vanderbilt Co.FABRICATION

Various organic peroxides will vulcanize SE4524U. Fabricators should make their selection of curing agent on the basis of method of fabrication, desired properties, and safety considerations.

The optimum cure cycle will depend on the method of processing used and physical dimensions of the vulcanized product. Specific applications may require the use of oven post cures.

Handling and Safety

Material Safety Data Sheets are available upon request from Momentive Performance Materials. Similar information for solvents and other chemicals used with Momentive Performance Materials Products should be obtained from your suppliers. When solvents are used, proper safety precautions must be observed.

CAUTION: 2,4-Dichlorobenzoyl peroxide catalyst (CAS#133-14-2) may generate polychlorinated biphenyls during the curing process. Consult Federal Regulation 40CFR 761 for inadvertent PCB generation regulations.

Storage and Warranty Period

The warranty period is 8 months from date of shipment from Momentive Performance Materials if stored in the original unopened container at 35C (95F).

Availability

SE4524U may be ordered from Momentive Performance Materials, Waterford, NY 12188, the Momentive Performance Materials sales office nearest you, or where appropriate an authorized Momentive Performance Materials product distributor.

Government Requirement

Prior to considering use of a Momentive Performance Materials' product in fulfilling any government requirement, please contact the Government and Trade Compliance office at 413-448-4624.

CDS4841

LEGAL DISCLAIMER

THE MATERIALS, PRODUCTS AND SERVICES OF MOMENTIVE PERFORMANCE MATERIALS, THEIR SUBSIDIARIES OR AFFILIATES (THE “SUPPLIER”), ARE SOLD SUBJECT TO THE SUPPLIER’S STANDARD CONDITIONS OF SALE, WHICH ARE INCLUDED IN APPLICABLE SALES AGREEMENTS, PRINTED ON THE BACK OF ACKNOWLEDGMENTS AND INVOICES, OR AVAILABLE UPON REQUEST. ALTHOUGH THE INFORMATION, RECOMMENDATIONS OR ADVICE CONTAINED HEREIN IS GIVEN IN GOOD FAITH, SUPPLIER MAKES NO WARRANTY OR GUARANTEE, EXPRESS OR IMPLIED, (I) THAT THE RESULTS DESCRIBED HEREIN WILL BE OBTAINED UNDER END-USE CONDITIONS, OR (II) AS TO THE EFFECTIVENESS OR SAFETY OF ANY DESIGN INCORPORATING SUPPLIER’S MATERIALS, PRODUCTS, SERVICES, RECOMMENDATIONS OR ADVICE. NOTHING IN THIS OR ANY OTHER DOCUMENT SHALL ALTER, VARY, SUPERSEDE OR OPERATE AS A WAIVER OF ANY OF THE SUPPLIER’S STANDARD CONDITIONS OF SALE.

Each user bears the full responsibility for making its own determination as to the suitability of Supplier’s materials, products, services, recommendations or advice for its own particular purpose. Each user must identify and perform tests and analyses sufficient to assure it that its finished parts will be safe and suitable for use under end-use conditions. Because actual use of products by the user is beyond the control of Supplier, such use is within the exclusive responsibility of the user, and Supplier cannot be held responsible for any loss incurred through incorrect or faulty use of the products. Further, no statement contained herein concerning a possible or suggested use of any material, product, service or design is intended or should be construed to grant any license under any patent or other intellectual property right of Supplier or any of its subsidiaries or affiliated companies, or as a recommendation for the use of such material, product, service or design in the infringement of any patent or other intellectual property right.