Coated polyester film assembly with a primer layer
AssigneeImperial Chemical Industries PLC
InventorsRoger Sidney Arthur Kelly, John Robert Wilson
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Abstract
Polyester films are primed with copolymers of acrylic or methacrylic acid esters, glycidyl acrylate or methacrylate, and acrylonitrile, optionally with an acrylic or methacrylic comonomer having a functional hydrophilic group, e.g. hydroxyethyl methacrylate. When the priming polymer contains less than 20 mole % of acrylonitrile as comonomer it is preferably cross-linked with an agent such as a melamine formaldehyde condensate.
Claims19
A coated film assembly, which comprises a support film of a linear polyester and a polymeric priming layer applied to at least one surface of the support film, said priming layer consisting essentially of a copolymer comprising:
- 3 to 25 mole % of glycidyl methacrylate or glycidyl acrylate,
- 35 to 95 mole % of one or more other copolymerisable monomers selected from the esters of acrylic and methacrylic acids, and
- 1 to 60 mole % of acrylonitrile.
A process for the production of a coated film assembly, which comprises applying a polymeric priming layer to at least one surface of a support film of a linear polyester, said priming layer comprising a copolymer comprising:
- 3 to 25 mole % of glycidyl methacrylate or glycidyl acrylate,
- 35 to 95 mole % of one or more other copolymerisable monomers selected from the esters of acrylic and methacrylic acids, and
- 1 to 60 mole % of acrylonitrile.
Dependencies are inferred from the claim text.