Claims
- 1. An element comprising on a support at least one layer comprising a hydrophilic binder, a metal oxide and/or carbon black and a block-copolymer which comprises at least one block of a methacrylate or acrylate monomer corresponding to the general formula: ##STR3## wherein R.sup.1 represents a methyl group or hydrogen, each of R.sup.3, R.sup.4 and R.sup.5 which may be the same or different represent a hydrogen, an alkyl, aryl or alkylaryl group, R.sup.2 represents a divalent organic group and X.sup.- represents an anion.
- 2. An element according to claim 1 wherein said block-copolymer contains only two blocks.
- 3. An element according to claim 2 wherein said block-copolymer contains a block of alpha-methylstyrene or methyl methacrylate and a block of a methacrylate monomer that corresponds to the formula: ##STR4##
- 4. An element according to claim 1 wherein said metal oxide is TiO.sub.2.
- 5. An element according to claim 1 wherein the hydrophilic binder is polyvinyl alcohol.
Priority Claims (1)
Number |
Date |
Country |
Kind |
90201849.8 |
Jul 1990 |
EPX |
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Parent Case Info
This is a division of application Ser. No. 07/727,446 filed Jul. 9, 1991, now U.S. Pat. No. 5,200,456.
US Referenced Citations (5)
Divisions (1)
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Number |
Date |
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Parent |
727446 |
Jul 1991 |
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