本试验研制了一种水性电缆防火涂料,考察了成膜物类型、成膜物含量、聚磷酸铵类型、季戊四醇类型、增强填料对水性电缆防火涂料性能的影响,研究结果表明:1)丙烯酸乳液的耐盐水性能优于醋丙乳液和EVA乳液,弹性乳液具有优异的附着力及柔韧性;2)当乳液含量较高时,有机成分含量高,涂层的耐火性能差,但涂层的理化性能较好,乳液含量在30%最优;3)低聚合度聚磷酸铵会影响乳液的贮存稳定性,包覆型聚磷酸铵阻燃性能优异且耐盐水性能好;4)双季戊四醇因具有更高的聚合度,其耐盐水性能优;5)钛白粉、氢氧化铝、矿物纤维可以提高膨胀碳层的强度,降低碳化率,提高阻燃性能。

In this experiment,a waterborne cable fire retardant coating was developed.The effects of film forming type,film content,ammonium polyphosphate type,pentaerythritol type and reinforcing filler on the performance of waterborne cable fire retardant coatings were investigated.The results showed that:1)Acrylic emulsion has better brine resistance than EVA emulsion.The elastic emulsion has excellent adhesion and flexibility.2)When the emulsion content is high,the content of organic components is high and the fire resistance of the coating is poor,but the physical and chemical properties of the coating are better.The optimum emulsion content is 30%.3)Low polymerization degree ammonium polyphosphate can affect the storage stability of the emulsion,and the flame retardant properties of the coated ammonium polyphosphate are excellent and the brine resistance is good.4)Dipentaerythritol has excellent salt water resistance because of its higher degree of polymerization.5)Titanium dioxide,aluminum hydroxide and mineral fiber can improve the strength of the expanded carbon layer,reduce the carbonation rate and improve the flame retardancy.