Patent GB-1066421-A (GB)
Title: Thermoplastic resin coating compositions
IPC: C09J123/20
Filed: 1966-01-27
Abstract: Composition comprise 90 to 40 weight per cent of petroleum wax and 10 to 60 weight per cent of polybutene-1 containing 20 to 60 weight per cent of amorphous polybutene-1, or in a modification 90 to 50 weight per cent of petroleum wax and 10 to 50 weight per cent of isotactic polybutene-1 having a melt index of 0.2 to 20 and an ether insolubility of at least 80 weight per cent.  The compositions may also contain up to 30 weight per cent, based on wax and polybutene, of a compatible resin to improve gloss or adhesion, e.g. terpene resins, coumarone-indene resins, rosin, rosin esters, abietic acid and esters, chlorinated polyphenyls and phenolic resins; and up to 50 weight per cent of fillers, dyes and pigments.  Preferred waxes are paraffin and microcrystalline waxes of melting point 120 DEG  to 190 DEG  F.  The compositions may be used for moulding, coating and laminating, and examples describe compositions comprising polybutene-1 and paraffin wax together with (8 and 9) microcrystalline wax and wood rosin, (10) a rosin derivative and (11) microcrystalline wax, a rosin ester and titanium dioxide.ALSO:Compositions comprise 10 to 60 weight per cent polybutene-1 containing 20 to 60 weight per cent of amorphous polybutene-1 and 90 to 40 weight per cent of a petroleum wax, or in a modification 10 to 50% of isotactic polybutene-1 having melt index of 0.2 to 20 and an ether insolubility of at least 80 weight per cent, and 90 to 50 weight per cent of petroleum wax, optinally together with a compatible resin, e.g. to improve gloss or adhesion. Specified resins are terpene resins, coumarone/indene resins, rosin, rosin esters, abietic acid and esters thereof, chlorinated polyphenyls and phenolic resins.  The compositions may also comprise fillers and pigments and may be used for moulding, coating and laminating.  Examples describe compositions comprising polybutene-1, paraffin wax together with (8 and 9) microcrystalline wax and wood rosin, (10) a rosin derivative and (11) microcrystalline wax, a rosin derivative and titanium dioxide.ALSO:Substrates may be coated with compositions comprising 90 to 40 weight per cent of petroleum wax and 10 to 60 weight per cent of polybutene-1 containing 20 to 60 weight per cent of amorphous polybutene-1, or in a modification 90 to 50 weight per cent of petroleum wax and 10 to 50 weight per cent of isotactic polybutene-1 having a melt index of 0.2 to 20 and an ether insolubility of at least 80 weight per cent.  The compositions may also comprise up to 30 weight per cent, based on the wax and polybutene, of a compatible resin to improve gloss or adhesion, e.g. terpene resin, coumarone-indene resin, rosin, rosin esters, abietic acid and esters, chlorinated polyphenyls and phonolic resins; and up to 50 weight per cent of pigments, dyes and fillers.  Preferred waxes are paraffin and microcrystalline waxes melting at 120 to 190 DEG F. The compositions may be applied by melt coating, using a roller or doctor blade, to metals to form strippable or, if a tackifying resin is present, adherent coatings, or to paper, paper and card boards, parchment, and plastic films, e.g. of polyethylene, polypropylene, polyethylene terephthalate, polycarbonates, polybutene-1, polymers of vinyl chloride, vinylidene chloride, acrylic and methacrylic acids and esters thereof and acrylonitrile, and regenerated cellulose. Examples describe the coating of (8) paper with compositions of polybutene, paraffin and microcrystalline waxes and wood rosin; (10) white paper board with compositions comprising polybutene, paraffin wax and a rosin derivative; but (11) corrugated boxboard with compositions comprising polybutene, paraffin and microcrystalline waxes, and rosin ester and titanium dioxide.