UV/EB curable butyl copolymers for lithographic and corrosion-resistant coating

• US 5,587,261 A
• Filed: 06/07/1995
• Issued: 12/24/1996
• Est. Priority Date: 12/20/1990
• Status: Expired due to Fees

• Current Assignee: Exxon Chemical Patents Inc. (Exxon Mobil Corporation)
• Original Assignee: Exxon Chemical Patents Inc. (Exxon Mobil Corporation)
• Inventors: McElrath, Kenneth O., Audett, Jay D.
• Primary Examiner(s): Lesmes, George F.
• Assistant Examiner(s): Codd, Bernard P.
• Application Number:
  US08/473,858
• Time in Patent Office: 566 Days
• Field of Search: 430/286.1, 430/287.1, 430/18, 430/270.1, 430/296, 430/300, 430/323, 430/325, 430/329, 430/195, 430/190, 430/175, 430/905, 430/913, 430/915, 430/916, 430/281.1, 522/35, 522/48, 522/53, 522/57, 522/160, 522/904, 522/905, 101/395, 101/401.1
• US Class Current: 430/18
• CPC Class Codes: C08F 210/00 Copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
• CPC Class Codes: C08F 212/06 Hydrocarbons
• CPC Class Codes: C08F 8/00 Chemical modification by after-treatment graft polymers, block polymers, crosslinking with unsaturated monomers or with polymers C08F251/00 - C08F299/00; of conjugated diene rubbers C08C
• CPC Class Codes: C08L 23/22 Copolymers of isobutene; Butyl rubber ; Homo- or copolymers of other iso-olefins
• CPC Class Codes: G03F 7/0388 with ethylenic or acetylenic bands in the side chains of the photopolymer
• CPC Class Codes: Y02P 20/582 Recycling of unreacted starting or intermediate materials
• CPC Class Codes: Y10S 430/106 Binder containing
• CPC Class Codes: Y10S 430/114 Initiator containing
• CPC Class Codes: Y10S 430/116 Redox or dye sensitizer
• CPC Class Codes: Y10S 430/117 Free radical
• CPC Class Codes: Y10S 522/904 Monomer or polymer contains initiating group
• CPC Class Codes: Y10S 522/905 Benzophenone group

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.

Claims

1. An article having printing elements 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 photoinitiator substituted on the pendent alkyl group, said copolymer having a substantially homogenous compositional distribution;

(b) selectively exposing said surface to gamma, UV, electron beam, visible, or microwave radiation to crosslink the copolymer in the area exposed to said radiation; and

(c) removing the uncrosslinked copolymer to develop a pattern of the crosslinked copolymer.