SE6335, SE6350 and SE6370
High Strength Elastomers

PRODUCT DESCRIPTION

SE6335, SE6350 and SE6370 Silplus elastomers are high strength compositions having Shore A durometers of 35, 50 and 70, respectively. They are designed to be blendable with each other or with the additives of the Silplus System to achieve a wide variety of properties.

KEY PERFORMANCE PROPERTIES

  • High tear strength
  • Blendable
  • Formulation Versatility

TYPICAL PRODUCT DATA

Uncured Compounds

Properties SE6335 SE6350 SE6370
Specific Gravity 1.09±.03   1.14±.03 1.21±.03
Appearance Translucent Translucent Translucent
Polymer Classification
(ASTM D-1418)		 VMQ VMQ VMQ

APPLICATIONS

SE6335, SE6350 and SE6370 elastomers, when properly compounded and catalyzed, can be used for a wide variety of applications requiring finishing for molding, extruding and calendering.

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.

Typical Properties of Cured Compound (Based on Limited Data)
The following properties were obtained on compression molded 0.075 inch ASTM sheets of SE6335, SE6350 and SE6370 elastomers catalyzed as indicated.

Formulation of Test Specimens
Curing Agent Type: Bis (2,4-dichlorobenzoyl) peroxide (50% Active)-  Press Cure: 10 min. @ 142C (288F) Curing Agent Level: 1.0 parts/100 parts base -  Post Cure: 4 hours @ 200C (392F)
A - Typical Physical Properties
B - Momentive Performance Materials Quality Control Specifications

ASTM
Test
Method 		Property SE6335 SE6350 SE6370
    A B A B A B
  Press Cure            
D-2240 Hardness, Durometer A 32   44   65  
D-412 Tensile Strength, psi 1000   1400   1100  
D-412 Elongation, % 900   800   600  
D-624 Tear Resistance, Die B, pi 170   200   190  
  Post Cure            
D-2240 Hardness, Durometer A 35 35±5 48 45±5 70  70±5
D-412 Tensile Strength, psi 1100 1000 min. 1300 1200 min. 1250 1100 min.
D-412 Elongation, % 750 500 min. 700  400 min. 500 400 min.
D-624 Tear Resistance, Die B, pi 170 150 min. 200 150 min. 225 150 min.
D-395 Compression Set, % 
70 hrs. @ 100C (212F)		 15 45 max. 15 45 max. 25 55 max.

Typical Properties of Cured Compound (Based on Limited Data)
Formulation of Test Specimens
Curing Agent Type: 2.5 Dimethyl-2,5-di(t-butyl peroxy) Hexane 100% Active
Press Cure: 10 min. @ 177C (350F)
Curing Agent Level: 0.15 parts/100 - Post Cure: 4 hours @ 200C (392F)

ASTM
Test
Method 		Property SE6335 SE6350 SE6370
  Press Cure      
D-2240 Hardness, Durometer A 33 47 69
D-412 Tensile Strength, psi 900 1400 1100
D-412 Elongation, % 700 800 400
D-624 Tear Resistance, Die B, pi 160 175 160
  Post Cure      
D-2240 Hardness, Durometer A 40 58 75
D-412 Tensile Strength, psi 1150 1350 1200
D-412 Elongation, % 650 650 450
D-624 Tear Resistance, Die B, pi 180 150 150
D-395 Compression Set, % 
70 hrs. @ 100C (212F)		 30 30 35

ADDITIVES

Silplus Elastomeric System includes additives to modify the processing and/or cured physical properties of the compounding bases.

Additives When to Use
SE6916HA Heat Aging Stabilizer Masterbatch to be used at 1.0 part per 100 of compounding base or blends thereof to improve the heat age resistance. See SE6916HA data sheet.
SE6921FR Flame Retardant Containing Masterbatch to   be used with compounding bases or blends there to improve the flame retardance of the compositions. See SE6921FR data sheet.
SE6925PA Process Aid Masterbatch to be used to adjust the plasticity of compounding base and blends thereof.
SE6910MO Magnesium Oxide Masterbatch can be used at 1.0 parts per 100 of compounding base to eliminate the need for post cure  when bis (2,4-Dichlorobenzoyl) peroxide is used. It may also be used at the 1.0 to 3.0 level to impart improved oil resistance.
SE6910TM ensile Strength Enhancer can be used at 1.0 parts per 100 of compounding base to optimize tensile strength when extending fillers are used.

FABRICATION

Various organic peroxides will vulcanize the Silplus Elastomeric System. 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 the physical dimensions of the vulcanized product. Specific applications will require the use of air oven post cures.

HANDLING AND SAFETY

Material Safety Data Sheets are available upon request from Momentive Performance Materials Products Division. Similar information for other chemicals used with Momentive Performance Materials products may be obtained form your suppliers.

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

Typical Curing Agents

Peroxides Commercial
Grades		 Form Typical Molding
Temperature		 Recommended
Use
Bis(2,4-di-chlorobenzoy)
Peroxide		 Cadox®TS-50
or Luperco®CST		 50% Active Paste 104-132C
(220-70F)		 Hot Air
Vulcanization
Benxoyl  Peroxide Cadox®TS or Luperco®AST 50% Active  Paste 116-138C
(240-280F) 		Molding
Steam Curing
Dicumyl  Peroxide Di-Cup®40C 40% Active Powder 154-177C
(310-360F)		 Molding Thick Sections Bonding  
Steam Curing
2,5-Dimethyl-
2,5-di(t-butyl peroxy)  hexane		 Varox® or
Luperco® 101-XL		 50% Active Powder
100% Active  Liquid 		166-182C  (330-360F) Molding Thick Sections     Bonding
Steam Curing

STORAGE WARRANTY PERIOD

The warranty period for SE845/SE846 and SE875/SE874 is 3 months from the date of shipment from Momentive Performance Materials if stored in the original unopened container at 35 - 50F.

AVAILABILITY

SE845/SE846, SE875/SE874 TUFEL silicone rubber compounds additive may be ordered from Momentive Performance Materials, Waterford, NY 12188, or the Silicone Sales office nearest you.

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.

CDS4731

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.