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United States Patent | 4,268,595 |
Katagiri , et al. | May 19, 1981 |
An electrostatic recording material comprising a support having formed thereon a dielectric layer composed of a terpolymer consisting of (a) methacrylic acid, (b) a monomer selected from the group consisting of (1) acrylic acid esters containing at least 4 carbon atoms and (2) methacrylic acid esters containing at least 5 carbon atoms, and (c) a monomer selected from the group consisting of (1) acrylic acid esters containing at least 4 carbon atoms and (2) methacrylic acid esters containing at least 5 carbon atoms, wherein monomer (b) and monomer (c) are different and at least one of the monomers (b) and (c) is an acrylic acid ester containing at least 11 carbon atoms or a methacrylic acid ester containing at least 8 carbon atoms, and a method for producing an electrostatic recording material, which comprises converting such a terpolymer to a water-soluble or water-emulsifiable salt of the terpolymer in which about 20 to 100 mol% of the carboxyl groups present form a salt with ammonia and/or a volatile amine, dissolving or dispersing the terpolymer salt in water, coating the resulting solution or dispersion onto a support, and drying the coating to volatilize the ammonia and/or volatile amine.
Inventors: | Katagiri; Kazuharu (Tokyo, JP), Ishikawa; Shozo (Tokyo, JP), Ohta; Shigeto (Tokyo, JP), Kitahara; Makoto (Tokyo, JP) |
Assignee: |
Copyer Co., Ltd.
(Tokyo,
JP)
|
Appl. No.: | 06/091,277 |
Filed: | November 5, 1979 |
Application Number | Filing Date | Patent Number | Issue Date | ||
887907 | Mar., 1978 | ||||
645143 | Dec., 1975 | ||||
Dec 27, 1974 [JP] | 49-148575 | |||
Current U.S. Class: | 430/48 ; 162/138; 427/121; 427/388.4; 427/389.9; 427/391; 428/514; 428/522; 524/425; 524/446 |
Current International Class: | G03G 5/02 (20060101); G03C 001/87 () |
Field of Search: | 430/48 252/63.7,64,63.5,63 427/385.5,121,388.4,391,389.9 162/138 428/514,522 260/29.6TA,29.6T,29.6RB,29.6RW |
2999038 | September 1961 | Drennen |
3035004 | May 1962 | Glavis |
3079358 | February 1963 | Uelzmann |
3248356 | April 1966 | Snyder |
3560417 | February 1971 | Pizzi et al. |
3728314 | April 1973 | Blank |
3920880 | November 1975 | Akiyama et al. |
3980602 | September 1976 | Jakubauskas |
4008353 | February 1977 | Gross et al. |
4085236 | April 1978 | Ishibashi et al. |
4097646 | June 1978 | Kitahara et al. |