| 摘要 |
Compositions comprise 70 to 95 weight per cent of petroleum wax and 30 to 5 weight per cent of a mixture comprising 25 to 75% by weight of an ethylene/propylene copolymer of molecular weight 20,000 to 5,000,000 and 75 to 25 weight per cent of a copolymer of ethylene with a C3- 5 ester of a saturated monocarboxylic acid and a terminally ethylenically unsaturated aliphatic alcohol or of a terminally ethylenically unsaturated monocarboxylic acid and a saturated aliphatic alcohol. Preferred copolymers are of ethylene with vinyl acetate, methyl acrylate or ethyl acrylate. The wax may be a paraffin or microcrystalline wax. The compositions may be used for melt coating paper and carton stock.ALSO:Compositions comprise 70 to 95 weight per cent of petroleum wax and 30 to 5 weight per cent of a mixture comprising 25 to 75 weight per cent of an ethylene/propylene copolymer of molecular weight 20,000 to 5,000,000 and 75 to 25 weight per cent of a copolymer of ethylene with a C3- 5 ester of a saturated monocarboxylic acid and a terminally ethylenically unsaturated aliphatic alcohol or of a terminally ethylenically unsaturated monocarboxylic acid and a saturated aliphatic alcohol. The wax may be a microcrystalline or paraffin wax obtained by dewaxing residual or distillate lubricating oil fractions respectively, or a plastic wax obtained by deoiling a soft wax fraction separated from paraffin wax. Preferred copolymers are of ethylene with vinyl acetate, methyl acrylate or ethyl acrylate. The compositions may be used for melt coating paper and carton stock.ALSO:Paper and carton board may be melt coated with compositions comprising 70 to 95 weight per cent of petroleum wax and 30 to 5 weight per cent of a mixture comprising 25 to 75 weight per cent of an ethylene/propylene copolymer of molecular weight 20,000 to 5,000,000 and 75 to 25 weight per cent of a copolymer of ethylene with a C3-5 ester of a saturated monocarboxylic acid and a terminally ethylenically unsaturated aliphatic alcohol or of a terminally ethylenically unsaturated monocarboxylic acid and a saturated aliphatic alcohol. Preferred copolymers are of ethylene with vinyl acetate, methyl acrylate or ethyl acrylate. The wax may be a paraffin or microcrystalline wax. In an example carton stock is coated with a composition comprising a blend of petroleum waxes, an ethylene/propylene copolymer and an ethylene/vinyl acetate copolymer. |
