Unusual Chemical Improves Wood Properties

Cell-wall and cell-lumen impregnation with tris (l-aziridinyl) phosphine oxide (APO) by absorption from non-polar solutions by polymolecular water present in these locations results in dimensional stability if APO is in the cell walls, and in fire-retardance and decay-resistance if APO is in the cell lumens. Dimensional stability (expressed as the ratio of percent antishrink efficiency percent retention) drops from 3.1 to 2.l as retention increases from 7.5 to 28.3 percent. Percent weight loss due to burning decreases as APO polymer retention increases. Tensile strength reduction occurs at higher retentions. The chemical (APO) is presented as an effective modifier of wood in cases which often limit non-treated material.

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