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| SLE5500 |
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Silicone
Liquid Elastomer
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SLE5300 and SLE5500 are two-component silicone liquid elastomers which can be cured rapidly at elevated temperatures, especially in thin films. Both products are supplied with curing agent in matched kits which are designed for use at a convenient 10:1 ratio by weight. SLE 5300 and SLE5500 are white in color, which facilitates pigmenting. These products differ principally in consistency, SLE5300 having a viscosity of 16,000 cps and SLE5500 having a viscosity of 100,000 cps. Intermediate consistencies may be achieved by blending the two materials. |
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SLE5300 and SLE5500 are
suggested for coating fiberglass and other industrial and structural
fabrics and sleeving. Typical applications include belting, tape,
insulation, electrical sleeving and protective blankets for use at
elevated temperatures. | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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TYPICAL UNCURED
PROPERTIES
TYPICAL UNCURED PROPERTIES WITH CURING AGENT
ADDED
TYPICAL CURED PROPERTIES Cured 1 Hr. @ 150C (302F)
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Typical Product Data values should
not be used as specifications. Assistance and recommendations are
available by contacting Momentive Performance Materials, Silicone Products
Division. |
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SLE5300 and SLE5500
contain no solvents. Therefore, cure can be accomplished rapidly in
a single step. Typical curing conditions for thin films [0.03 - 0.75
mm (1-30 mils)] on coated fabrics are 1 - 2 minutes at 204C (400F).
Standard equipment for coating or supported extrusion may be used with
little or no modification.
Compatibility SLE5300 and SLE5500 silicone liquid elastomers will cure when applied to clean dry surfaces which have been properly prepared. However, certain materials, such as butyl and chlorinated rubber, sulfur-containing materials, amines, and certain metal soap-cured RTV silicone rubber compounds, can cause cure inhibition. Cure inhibition is characterized by a gummy appearance of the silicone at the interface between it and the substrate. It is recommended that a sample patch test be performed with the SLE product to determine if a barrier coating or other inhibition-preventing measures are necessary before applying the liquid silicone elastomer. Mixing Since setting of filler occurs during storage, SLE5300A base compound should be thoroughly stirred before mixing with SLE5300B curing agent. Select a mixing container 4 - 5 times larger than the volume of silicone liquid elastomer to be used. Weigh out ten parts of the A component and one part of the B component. Since the SLE products are kit-matched, work time or pot life, cure time, and final properties of the cured SLE silicone elastomer can be assured only if the A component is used with the B component from the same kit. With clean tools, thoroughly mix the A and B components together, scraping the sides and bottom of the container carefully to produce a homogeneous mixture. When using power mixers, take care not to entrap large amounts of air or cause overheating of the mixture, resulting in short pot life. Deaeration Air entrapped during mixing should be removed to eliminate voids in the cured product. Expose the mixed materials to an absolute pressure of about 25mm of mercury (vacuum of 29 in. of mercury). The material will expand, crest, and recede to about the original level as the bubbles break. Degassing is usually complete in about two minutes after frothing ceases. Automatic equipment designed to meter, mix, deaerate, and dispense two-component silicone rubber products will add convenience to continuous or large volume operations. For additional information refer to equipment guide CDS-1758 for the Versatilies (RTV Silicone Rubber Two-Component Industrial Products). Curing Thin coatings of SLE5300 or SLE5500 [0.05 - 0.13 mm (2-5 mils)] applied to fabric substrates by dipping, spreading, knifing or extrusion can be cured sufficiently in one minute at 204C (400F) to permit handling. Thicker coating will decrease the rate of heat transfer and therefore will require a somewhat longer curing time or a higher curing temperature [232C (450F) maximum]. Bonding SLE5300 and SLE5500 silicone liquid elastomers will frequently penetrate the weave of a fabric substrate and will thereby be held in place. Where the weave is very tight or the substrate is not permeable, a primer may be required to achieve a suitable bond. In such cases apply a uniform thin film [0.01 - 0.02 mm (0.5-1 mil)] of Momentive Performance Materials SS4155 or SS4120 silicone primer to the clean, dry surface and allow the primer to dry for one hour. Finally, apply freshly catalyzed SLE5300 or SLE5500 to the primed surface and cure as suggested. For more details on priming and adhesion please refer to Momentive Performance Materials data sheet on RTV primer. SS4155 and SS4120 silicone primers contain flammable solvents. When any solvent is used, proper safety precautions must be observed. All solvents must be considered toxic and must be used only in well ventilated areas. Exposure to high vapor concentration must be avoided. When flammable solvents are used, storage and use must be in areas away from heat, sparks, open flames, or other sources of ignition.
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SLE5300B and SLE5500B
curing agents can generate flammable gas upon contact with acidic, basic
or oxidizing materials. Avoid such contact.
Material Safety Data Sheets are available upon request from Momentive Performance Materials, Silicone Products Division. Similar information for solvents and other chemicals used with our products may be obtained from your suppliers.
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SLE5300A and SLE5500A
base compounds and their respective curing agents will remain useful for
six months from the date of shipment when stored in the original unopened
containers at temperatures below 27C (80F).
SLE5300B and SLE5500B curing agents can
generate flammable gas upon contact with acidic, basic or oxidizing
materials. |
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Momentive Performance Materials SLE5300
and SLE5500 silicone liquid elastomers are available from Momentive Performance Materials
Company. For more information on these products, contact General
Electric Company, Silicone Products Division, RTV Products Department,
Waterford, New York 12188, or the Silicone Sales Department Office nearest
you. |
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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.
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| 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. |