| 摘要 |
<p>A composition which is to be applied as a film to vinyl and polyester surfaces to render them receptive to the application of inks and other coatings, comprises 3-12% by weight vinyl chloride-acetate copolymer, 7.5-20% by weight of at least one member selected from acrylic polymers and alkyd-acrylic copolymers, 1-5% by weight isophonone and 45-75% by weight of at least one other ketone. The ketone may be methyl-ethyl ketone and/or methylisobutyl ketone. The composition may include 0-5.0% by weight of at least one member selected from formaldehyde resins and epoxy resins, from 0-1% by weight of a stabilizer and from 0-25% by weight of at least one aromatic hydrocarbon e.g. toluol or xylol. The total solids content preferably does not exceed 20% by weight of the composition. Once applied to a surface the film may be passed through a baking unit at a temperature above 40 DEG C. but not exceeding 90 DEG C. for from 30 seconds to 5 minutes. The composition may include pigments or dyes to provide colour on the vinyl or polyester resin surfaces. A coating comprising an alkyd or nitrocellulose based vehicle containing a colouring material may be provided over the film.ALSO:A composition which is to be applied to sheets of vinyl or polyester to render them receptive to the application of inks and other coatings, comprises 3-12% by weight vinyl chloride-acetate copolymer, 7.5-20% by weight of at least one member selected from acrylic polymers and alkyd-acrylic copolymers 1-5% by weight isophonone and 45-75% by weight of at least one other ketone. The ketone may be methyl-ethyl ketone and/or methylisobutyl ketone. The composition may include 0-5.0% by weight of at least one member selected from formaldehyde resins and epoxy resins, from 0-1% by weight of a stabiliser and from 0-25% by weight of at least one aromatic hydrocarbon e.g. toluol or xylol. The total solids content preferably does not exceed 20% by weight of the composition. Once applied to a surface the film may be passed through a baking unit at a temperature above 40 DEG C but not exceeding 90 DEG C for from 30 seconds to 5 minutes. The composition may include pigments or dyes to provide colour on the vinyl or polyester resin surfaces. A coating comprising an alkyd or nitrocellulose based vehicle containing a colouring material may be provided over the film.</p> |
