Processes for coating films
AssigneeImperial Chemical Industries PLC
InventorsRoger Sidney Arthur Kelly, John Robert Wilson
Life of this patent
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Abstract
Substrate layers comprising an acrylic or methacrylic copolymer or a copolyester on a polyester film support are coated with an aqueous latex or solution comprising an acrylic or methacrylic copolymer, an unhydrolyzed or partially hydrolyzed polymer or copolymer of vinyl acetate or a copolymer of vinylidene chloride together with a crosslinking component. The coated films may be used in a variety of end uses, including drafting films.
Claims10
A process for the production of a coated film, which comprises coating a substrate layer applied to a self-supporting synthetic linear polyester film with an aqueous, cross-linking polymeric latex or solution, wherein said substrate layer comprises:
- (1) a copolymer formed from ethyl acrylate, methyl methacrylate and methacrylamide, or (2) a copolyester, and the aqueous polymeric latex or solution applied thereto comprises:
- A.
- i. one or more polymers or copolymers of one or more of acrylic acid, methacrylic acid, an ester of acrylic acid or methacrylic acid;
- ii. an unhydrolysed or a partially hydrolysed polymer or copolymer of vinyl acetate;
- or
- iii. one or more copolymers of vinylidene chloride;
- and
- B.
- one or more resinous components capable of
- intra-molecular cross-linking;
- thereby providing a polyester film having a substrate superimposed thereon coated with said polymeric latex or solution.
A coated film which comprises a self-supporting synthetic linear polyester film having a substrate layer superimposed thereon, said substrate layer comprising:
- (1) a copolymer formed from ethyl acrylate, methyl methacrylate and methacrylamide, or (2) a copolyester, and a cross-linked polymeric layer superimposed on the substrate layer comprising:
- A.
- i. one or more polymers or copolymers of one or more of acrylic acid, methacrylic acid, an ester of acrylic acid or methacrylic acid;
- ii. an unhydrolysed or a partially hydrolysed polymer or copolymer of vinyl acetate;
- or
- iii. one or more copolymers of vinylidene chloride;
- and
- B.
- one or more resinous components capable of intra-molecular cross-linking.
Dependencies are inferred from the claim text.