UV/EB curable butyl copolymers for lithographic and corrosion-resistant coating applications
AssigneeExxon Chemical Patents Inc.
InventorsJay D. Audett, Kenneth O. McElrath
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Abstract
A lithographic coating and method of framing a lithographic image are disclosed. The method comprises coating at least a portion of a surface of an article with a radiation-crosslinkable polymer, and exposing the coated surface to a pattern of radiation to crosslink the polymer in a lithographic image. The functionalized polymer is a copolymer of an isoolefin of 4 to 7 carbon atoms and para-alkylstyrene, wherein the para-alkylstyrene is functionalized with a radiation reactive group at the para-alkyl group of the para-alkylstyrene.
Claims3
An article having a barrier coating resistant to corrosion and solvents made by
- (a) coating at least a portion of a surface of an article with a composition comprising a random copolymer of an isoolefin of 4 to 7 carbon atoms and para-alkylstyrene comonomer, said isoolefin comprising 10 to 99.5 weight % of said copolymer and said para-alkylstyrene comprises 0.5 to 90 weight % of said copolymer, wherein about 0.5 to 55 weight % of said copolymer comprises para-alkylstyrene monomers having a photo-initiator substituted on the pendent alkyl group, said copolymer having a substantially homogenous compositional distribution;
- and
- (b) exposing a portion of said coating to gamma, UV, electron beam, visible, or microwave radiation to crosslink the copolymer.
A surface having lithographic image thereon made by
- (a) applying a coating to at least a portion of a surface of an article with a composition comprising a random copolymer of an isoolefin of 4 to 7 carbon atoms and para-alkylstyrene comonomer said isoolefin comprising 10 to 99.5 weight % of said copolymer and said para-alkylstyrene comprises 0.5 to 90 weight % of said copolymer, wherein about 0.5 to 55 weight % of said copolymer comprises para-alkylstyrene monomers having a photoinitiator substituted on the pendent alkyl group, said copolymer having a substantially homogenous compositional distribution;
- (b) selectively exposing a portion of said coating to gamma, UV, electron beam, visible, or microwave radiation to crosslink the copolymer, thereby forming a crosslinked latent lithographic image;
- and
- (c) removing the uncrosslinked copolymer to develop the lithographic image.
Dependencies are inferred from the claim text.