Provided is an all-water
polyurethane self-skinning foam composition. The all-water
polyurethane self-skinning foam composition is applied to armrests of treadmills, guard railings of highways, backrests of treatment facilities, and the like, and is composed of, by weight, 100 parts of combined polyether and 30-45 parts of
isocyanate. The combined polyether mainly contains
polypropylene oxide glycol with a low
degree of unsaturation and with the
hydroxyl value being 33-37 mgKOH / g,
propylene oxide-
ethylene oxide copolyether with the
hydroxyl value being 21-27 mgKOH / g, a cross-linking agent, water, a catalyst, a surface
active agent, a light stabilizer and nano-scale
silicon carbide, wherein the cross-linking agent comprises at least two
hydrogen atoms which can react with
isocyanate, and the molecular weight of the cross-linking agent is 60-200. The all-water
polyurethane self-skinning foam composition has excellent compression resistance and
collision resistance, is wide in range of abrasion resistance, oil resistance and
hardness and high in strength and elongation, and achieves shock absorption. The all-water polyurethane self-skinning foam composition can pass the standard ISO10993-5-2009 in-vitro
cell toxicity test.