Epoxy foam

CeUular polymers are also used for pipe and vessel insulation. Spray and pour-in-place techniques of appHcation are particularly suitable, and polyurethane and epoxy foams are widely used. Ease of appHcation, fire properties, and low thermal conductivity have been responsible for the acceptance of ceUular mbber and ceUular poly(vinyl chloride) as insulation for smaller pipes. 

Novolac and resol cold hardening oligomers habe been used 19-75-99). In the case of resol foams the process technology is not different from that used for epoxy foams. Glass, phenolic resins, carbon, polystyrene, polyacrylonitrile and poly(vinylidene chloride) microspheres have been used as fillers ... 

Unsaturated polyester syntactic foams are cheaper than epoxy foams, although the latter are stronger, more water resistant, and shrink less if cured at room or high temperatures 83,136). One merit of polyester syntactic foams is the low apparent density that can be obtained. But the mechanical characteristics depend upon the apparent density e.g. for the Soviet polyester syntactic foams (SPB), using phenolic microspheres (BV-01)1 ... 

Many papers have shown that the water absorption of a syntactic foam is proportional to that of its binder. Polyester syntactic foams, for example, absorb more water, even with dressing additives (silanes, vide infra) than do epoxy syntactic foams (Fig. 11)1. The hydrolytic stability of epoxy foams is increased when the glass microspheres are replaced by carbon ones (Table 19)40). 

The filler type has some effect on a syntactic foam s thermal resistance. The replacement of glass microspheres by phenolic ones improves the thermal oxidation stability of epoxy foams, especially at 100-150 °C2>. 

Dementyev and Tarakanov 8 160) used another approach by adopting a macrostructural model of syntactic foam morphology161 to calculate the strength properties of an epoxy foam with phenolic microspheres. They made two restrictive assumptions, i.e. that the mechanical properties of the microsphere walls and the binder are the same, and that the volume fraction of filler is substantially smaller than that of the matrix. The macrostructural parameters of the syntactic foam are then defined in terms of the dimensions of the microspheres, and their displacements have the same nature as the deformations of the nodes and edges of an imaginary latice. We then get ... 

Giessner, B. G. Epoxy foam - a novel etectrical insulation material pp. 336-339. Proc. 

MISCELLANEOUS AND SPECIALTY FOAMS (Epoxy Foams, Polyester Foams, Silicone Foams, Urea-Formaldehyde Foams, Polybenzimidazole, Foams, Polyimide Foams, Polyphosphazene Foams, and Syntactic Foams)... 

Epoxy foams are rigid. Some are predominantly of closed-cell structure and some of open-cell structure. Current efforts may lead to... 

Uses Epoxy/Foam/Plywood Form + Tooling weight reduced, <5kg + Beam penetrates composite and form + Co-cured multiple matrix resins... 

Uses Blowing agent for rubber goods, epoxy foam, adhesives... 

El-Hadek, M.A. and Tippur, H. V. (2003) Dynamic fracture parameters and constraint effects in functionally graded syntactic epoxy foams. International Journal of Solids arul Structures, 40, 1885-1906. 

Alonso, M.V., Auad, M.L., Nutt, S. Shoit-fiber-ieinforced epoxy foams. Compos. A Appl. Sci. Manuf. 37, 1952-1960 (2006)... 

Quadrini et al. developed a solid-state process to yield epoxy foams with different contents of nanoclay (up to 10%wt) [86]. They demonstrated excellent shape memory properties for the nanocomposite foams with low filler loadings and were able to control porosity by varying the solid precursors during the foaming process. 

A modified epoxy, foaming adhesive in sheet form which during the 120 C curing expands to fill gaps and adhere strongly to all parts of the typically honeycomb sandwich construction. Designed for use in conjunction with Araldite 312, 312/5 or 609, where the operating temperature can be between -55 C and +100 C. 

A high-density, low expansion modified epoxy foam for fuel barrier and wet wing applications. ... 

Most applications require that the cells within the battery be rigidly fixed in position. In many instances this involves the encapsulation of the cells with epoxy, foams, tar, or other suitable potting materials. 

Modified Epoxy Film (supported) Areal wt 0.4 kgftn ModHied Epoxy Foaming Film (unsupported) ... 

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