Wax compositions

摘要

A wax composition especially suitable for coating paperboard (see Group VIII) comprises (a) a crystalline paraffin wax melting in the range 120 DEG -180 DEG F., preferably 130 DEG -155 DEG F., the wax suitably containing not more than 0,5% by weight of oil (b) a microcrystalline wax melting in the range 160 DEG -180 DEG F., preferably above 165 DEG F., (c) a polyolefin, preferably polyethylene, having a molecular weight of 1,500-25,000, most suitably about 12,000 and (d) a petroleum resin or styrne polymer or copolymer having a molecular weight of 800-2,000, most suitably 1,000-1,200. By weight of the composition (a) generally comprises at least 60% and preferably more than 75%; (b) comprises less than 30% and preferably 5-15%; (c) comprises not more than 8% and preferably 1-4%; and (d) amounts to 1-25%, most suitably 5-10%. Petroleum resin (d) is suitably that obtained by treating a mixture of olefins, diolefins, aromatic hydrocarbons, paraffins and naphthenes with an aluminium halide catalyst at -22 DEG to 167 DEG F.ALSO:A wax composition especially suitable for coating paperboard (see Group VIII) comprises (a) a crystalline paraffin wax melting in the range 120 DEG -180 DEG F., preferably 130 DEG -155 DEG F., the wax suitably containing not more than 0.m15% by weight of oil, (b) a microcrystalline wax melting in the range 160 DEG -180 DEG F., preferably above 165 DEG F., (c) a polyolefin, preferably polyethylene, having a molecular weight of 1,500-25,000, most suitably about 12,000 and (d) a petroleum resin or styrene polymer or copolymer having a molecular weight of 800-2,000, most suitably 1,000-1,200. By weight of the composition (a) generally comprises at least 60% and preferably more than 75%; (b) comprises less than 30% and preferably 5-15%; (c) comprises not more than 8% and preferably 1-4%; and (d) amounts to 1-25%, most suitably 5-10%. Petroleum resin (d) is suitably that obtained by treating a mixture of olefins, diolefins, aromatic hydrocarbons, paraffins and naphthenes with an aluminium halide catalyst at -22 DEG to 167 DEG F.