MICROSPHERES GLASS BUBBLES – LOW DENSITY EPOXY SYNTACTIC FOAM FILLER – 1.5 POUND

$20.71

3M™ Scotchlite™
Hollow Glass Microspheres
LOW DENSITY EPOXY FILLER
1.5 Pounds Net Weight
Approximately 1 Gallon In Volume

3M™ Glass Bubbles are engineered hollow glass microspheres that are alternatives to conventional epoxy fillers for lowering weight per unit volume (density) while improving compressive strength performance.

S38-HS 3M™ Scotchlite™  is an engineered hollow glass microspheres, also known as microballoons that are inert fillers typically incorporated into a binder system such as an epoxy resin to lower its density and improve buoyancy, process sanding, dimensional stability and reduce shrinkage. This unique low-density filler is used in a wide range of industries to reduce part weight, lower costs and enhance mechanical properties. The unique spherical shape of Scotchlite glass bubbles offers a number of important benefits including higher filler loading with minimal viscosity increase, reduce exothermic temperatures for large castings while minimizing shrinkage and warping of the casted part.

Add this low-density filler to an epoxy resin system and create what is known as a “SYNTACTIC FOAM” in the composite materials industry. Syntactic foams are commonly used as light-weight adhesives and casting materials that demonstrate improved chemical resistance. It is typically used as a low-density coating, a tooling compound or as a dimensional stable casting resin for composite parts fabricating.

Cured cast parts are typically buoyant in water also yields higher dimensional stability, improved machining and sanding and low porosity. The microspheres are hollow glass bubbles thus creating a very strong foam systems with closed cells. This will yield a low porosity integral skin that provides moisture resistance as well as low gas permeability over a wide service temperature.

SKU: MAXMIRCRO1.5LBS Category:

Description

The intended application of the syntactic foam is dictated by the amount of the microspheres added to the resin system.  Mix equal parts by volume of microspheres with an epoxy resin system and obtain a pourable, self leveling syntactic foam that offers reduced weight per unit volume, suitable for casting parts with improve dimensional stability or as a low density adhesive used in maximizing reduction of structural weight with little effect of the adhesion quality.

Higher loading of the microsphere will yield a paste-like consistency suitable as a fairing compound with excellent stability in its Coefficient of Thermal Expansion or CTE. Adding a small amount of precipitated fumed silica, also known as Cab-O-Sil or Wacker will create a none-sagging or thixotropic compound that can be applied on vertical or overhead surfaces without flowing. Thixotropic syntactic foams can also be s brush or trowel applied coating with improved chemical and abrasion resistance.

When mixed with an epoxy based potting or encapsulating resin used in an electronic application, the addition of the microspheres dramatically improves dielectric constants, volume resistivity or electrical insulative values as well as its cured chemical resistant properties.

Click here to view Microsphere Mixing Technique on YouTube

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Additional information

Weight3 lbs
Dimensions11 × 11 × 13 in

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