Support for photographic material
AssigneeKonica Corporation
InventorsTakatoshi Yajima, Kenji Nakanishi, Hiromitsu Araki, Hideyuki Kobayashi, Yoshioki Okubo, Tetsutaro Hashimura, Hiroshi Naito
Life of this patent
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Abstract
Disclosed is a support for a photographic material which comprises a multilayer film in which a layer of a copolymerized polyester is laminated on at least one surface of a polyester layer, wherein the copolymerized polyester contains an aromatic dicarboxylic acid having a metal sulfonate group as a copolymer component in an amount of 2 to 7 mole % based on all ester bond units and further a polyalkylene glycol as a copolymer component in an amount of 3 to 10% by weight based on the total weight of a polyester which is a reaction product.
Claims14
A support for a photographic material which comprises a multilayer film in which a layer of a copolymerized polyester is laminated on at least one surface of a polyester layer,
- wherein said polyester is obtained by reacting a first aromatic dibasic acid selected from the group consisting of terephthalic acid, isophthalic acid and 2,6-naphthalenedicarboxylic acid, with a glycol selected from the group consisting of ethylene glycol, propylene glycol, butanediol, neopentyl glycol, 1,4-cyclohexanedimethanol, diethylene glycol and p-xylene glycol,
- wherein said copolymerized polyester comprises:
- a) said first aromatic dicarboxylic acid,
- b) said glycol,
- c) a second aromatic dicarboxylic acid selected from the group consisting of terephthalic acid, isophthalic acid, 2,6-naphthalenedicarboxylic, ##STR4## wherein X represents ##STR5## R and R.sup.1 each represent --CH.sub.2).sub.n -- where n represents an integer of 1 to 20;
- M represents sodium, potassium or lithium, wherein said terephthalic acid, said isophthalic acid or said 2,6-naphthalenedicarboxylic acid has a metal sulfonate group, and an amount of said second aromatic dicarboxylic acid is 2 to 7 mole % based on all ester bond units of said copolymerized polyester, and further
- d) a polyalkylene glycol selected from the group consisting of a polyethylene glycol, a polypropylene glycol and a polytetramethylene glycol, in an amount of 3 to 10% by weight based on the total weight of said copolymerized polyester,
- wherein each of said first and second aromatic dibasic acids, said glycol, said polyethylene glycol and said polytetramethylene glycol may have a substituent,
- wherein a ratio of the total copolymerized polyester layer thickness d.sub.2 to the total polyester layer thickness d.sub.1 is 0.7.ltoreq.d.sub.2 /d.sub.1 .ltoreq.3.
Dependencies are inferred from the claim text.