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Chemical foaming agents

Using a laboratory technique previously developed to evaluate the performance of chemical foaming agents in XLPE foam, metallocene polyolefins are evaluated at various addition levels to branched LDPE to determine their effect on general foam quality (cell size, density, appearance). The laboratory method is discussed, and conclusions on acceptable levels of the metallocene resins are offered. 5 refs. [Pg.77]

Azodicarbonamide, c.f., Figure 7.2 is a common chemical foaming agent. It is also addressed as azobisformamide. The thermal decomposition of azodicarbonamide results in the evolution of nitrogen, carbon monoxide, and ammonia, which are trapped in the polymer as bubbles to form a foamed article. [Pg.196]

PC, PEST or PEI with 1-50 wt% of ABS and a chemical foaming agent moldable blends for chemical foaming Allen and Avakian, 1987... [Pg.34]

Engineering resins and their blends have been foamed using mainly chemical foaming agents, e.g., hydrazodicarboxylates, benzazimides or 5-phenyltetrazole. However, products of decom-... [Pg.62]

Chemical Foaming Agent Trade Name and Supplier Processing Temperature Range, (°C) Gas Yield (cm /g) Recommended for... [Pg.825]

Pipe (foam core). [Data from Celogen AZRV. Chemical foaming agent. Crompton. [Pg.144]

Concentrations Used in Processing. The amount of chemical foaming agent used depends mainly on the process (see Table 5.31). [Pg.356]

Karayan, V. (2001) The effect of chemical foaming agents on the processing and properties of polypropylene-woodflour composites. Proceedings of the Sixth International Conference on Woodfiber-Plastic Composites, Forest Products Society, Madison, WI, pp. 249-252. [Pg.289]

CFA chemical foaming agent EMA etli ene-methyl acrylate... [Pg.1117]

Chemical foaming agents Global 87 2003 Dongjin SemiChem... [Pg.151]

Microcell 545 and Microcell 546 are chemical foaming agents with endothermic reaction kinetics. At low doses the formulations produce very fine cell structures. They can also be used as nucleating agents for directly gassed systems or in masterbatch formulations. ... [Pg.108]

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See also in sourсe #XX -- [ Pg.589 ]



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