High gloss ultraviolet curable coating for porous substrates

A gloss coated product comprising a substrate and a gloss coating applied on a surface thereof;

• wherein said gloss coating is prepared from a homogeneous mixture of radiation curable oligomers and monomers and photosensitizers having a viscosity in the range of 4500 to 8000 cps;
• wherein said radiation curable oligomers are acrylated epoxy oligomers, said monomers are triacrylate monomers and said photosensitizer consists essentially of a combination of benzophenone and an acrylated amine in the ratio of 3/1 to 1/1;
• wherein said substrate is a synthetic paper comprising a blow-molded container made of a predetermined polymeric material and having an outer surface and a label attached to said outer surface of said blow-molded container, the improvement wherein said label is a synthetic paper, comprising a nonwoven web of wet-laid thermoplastic fibers, all or most of said thermoplastic fibers being made of a predetermined polymeric material, said web having a continuous coating of pigmented binder formed on at least one surface thereof, said thermoplastic fibers made of said predetermined polymeric material being bonded by said pigmented binder without substantial thermal fusion by curing said binder at temperatures below the melting temperature of said predetermined polymeric material, said synthetic paper being bonded to said outer surface of said blow-molded container, at least some of said fibers making up said synthetic paper being made of said predetermined polymeric material;
• and
• the presence of said photosensitizers causes polymerization of said radiation curable oligomers and monomers when exposed to an ultraviolet light source resulting in curing of said mixture onto the substrate surface without substantial penetration into the substrate surface forming the gloss coated product.

A gloss coated product comprising a substrate and a gloss coating applied on a surface thereof;

• wherein said gloss coating is prepared from a homogeneous mixture of radiation curable oligomers and monomers and photosensitizers having a viscosity in the range of 4500 to 8000 cps;
• wherein said radiation curable oligomers are acrylated epoxy oligomers, said monomers are triacrylate monomers and said photosensitizer consists essentially of a combination of benzophenone and an acrylated amine in the ratio of 3/1 to 1/1;
• wherein said substrate is a cellulose-free synthetic paper comprising a nonwoven web of 100% thermoplastic fibers entangled by a wet-lay process, said thermoplastic fibers comprising substantially unfused pulp made of a predetermined polymeric material;
• and
• the presence of said photosensitizers causes polymerization of said radiation curable oligomers and monomers when exposed to an ultraviolet light source resulting in curing of said mixture onto the substrate surface without substantial penetration into the substrate surface forming the gloss coated product.

A gloss coated product comprising a substrate and a gloss coating applied on a surface thereof;

• wherein said gloss coating is prepared from a homogeneous mixture of radiation curable oligomers and monomers and photosensitizers having a viscosity in the range of 4500 to 8000 cps;
• wherein said radiation curable oligomers are acrylated epoxy oligomers, said monomers are triacrylate monomers and said photosensitizer consists essentially of a combination of benzophenone and an acrylated amine in the ratio of 3/1 to 1/1;
• wherein said substrate is a cellulose-free synthetic paper comprising a nonwoven web of 100% thermoplastic fibers entangled by a wet-lay process, said web having the following fiber composition:
• 50-90% chopped polyester staple fibers;
• 0-40% binder fibers containing a thermoplastic material having a melting temperature less than the melting temperature of said chopped polyester staple fibers;
• and
• 0-10% polyvinyl alcohol binder fibers;
• and
• the presence of sand photosensitizers causes polymerization of said radiation curable oligomers and monomers when exposed to an ultraviolet light source resulting in curing of said mixture onto the substrate surface without substantial penetration into the substrate surface forming the gloss coated product.

A gloss coated product comprising a substrate and a gloss coating applied on a surface thereof;

• wherein said gloss coating is prepared from a homogeneous mixture of radiation curable oligomers and monomers and photosensitizers having a viscosity in the range of 4500 to 8000 cps;
• wherein said radiation curable oligomers are acrylated epoxy oligomers, said monomers are triacrylate monomers and said photosensitizer consists essentially of a combination of benzophenone and an acrylated amine in the ratio of 3/1 to 1/1;
• wherein said substrate is a high-opacity cellulose-free synthetic paper comprising a nonwoven web of wet-laid synthetic fibers, said synthetic fibers including binder fibers and polymeric pulp or chopped polymeric staple fibers, said polymeric pulp or chopped polymeric staple fibers being bonded by fusing said binder fibers without substantial fusion of said polymeric pulp or chopped polymeric staple fibers at temperatures below the melting temperature of said polymeric pulp or chopped polymeric staple fibers;
• and
• the presence of said photosensitizers causes polymerization of said radiation curable oligomers and monomers when exposed to an ultraviolet light source resulting in curing of said mixture onto the substrate surface without substantial penetration into the substrate surface forming the gloss coated product.

A method for making a gloss coated substrate comprising:

• blending radiation curable oligomers and monomers with photosensitizers to form a gloss coating composition consisting essentially of radiation curable oligomers and monomers and photosensitizers wherein said radiation curable oligomers are acrylated epoxy oligomers, said monomers are triacrylate monomers and said photosensitizer consists essentially of a combination of benzophenone and an acrylated amine in the ratio of 3/1 to 1/1;
• heating said mixture with agitation to form a homogeneous mixture having a viscosity in the range of 4500 to 8000 cps;
• cooling said homogeneous mixture and applying to at least one surface of the substrate;
• exposing said homogeneous mixture to an ultraviolet light source;
• wherein the presence of said photosensitizers causes polymerization of said radiation curable oligomers and monomers resulting in curing of said mixture onto the substrate surface without substantial penetration into the substrate surface forming the gloss coated substrates;
• wherein aid substrate is non-woven, woven, synthetic paper, paper, paperboard, plastic or metal.