Coating compositions for master media for anhysteretic recording

Details Coating compositions for master media for anhysteretic recording Coating compositions for master media for anhysteretic recording

1991-12-20

1993-07-27

Pianalto, Bernard

Compositions

Magnetic

Free metal or alloy containing

252 6254, B22F 300, C04B 3564, H01F 104

Patent

active

052308189

ABSTRACT:
A coating composition is provided for master media for anhysteretic transfer of magnetically recorded information to a copy medium which comprises from about 50 to about 69% of a magnetic pigment, from about 2.95 to about 6.90% of an abrasive powder, from 0 to about 5.4% of a colloidal inorganic powder, from about 2.9 to about 4.5% of a wetting agent, from about 0.7 to about 3.1% of a lubricant, from about 14.1 to about 33.6% of a binder, at least 85% of which is a polyurethane and from 0.05 to about 15% of which is a polyisocyanate crosslinking agent. The composition is preferably disposed on a substrate backcoated with a composition containing from about 15 to about 25% of carbon black, from about 15 to about 25% of an inorganic filler, from about 0.5 to about 2% of an abrasive, from about 20 to about 30% of a vinyl copolymeric binder, from about 15 to about 25% of a polyurethane binder, from about 7.5 to about 17.5% of an NCO terminated crosslinking agent, from about 0.9 to about 2% of a lubricant, and from about 0.06 to about 0.6% of a coating aid. Master media for anhysteretic recording containing the coating composition of the invention and an anhysteretic duplicating system are also provided as are processes for preparing the coating compositions and master media and for anhysteretic duplication.

REFERENCES:
patent: 3873461 (1975-03-01), Mollard et al.
patent: 3921208 (1975-11-01), Chapman
patent: 3961946 (1976-06-01), Makino et al.
patent: 3982276 (1976-09-01), Roos
patent: 4061824 (1977-12-01), Deffeyes et al.
patent: 4101938 (1978-07-01), Hanai
patent: 4237189 (1980-12-01), Deffeyes
patent: 4237506 (1980-12-01), Manly
patent: 4277806 (1981-07-01), Jeffers et al.
patent: 4281043 (1981-07-01), Deffeyes
patent: 4332834 (1982-06-01), Takei
patent: 4363038 (1982-12-01), Fayling
patent: 4442159 (1984-04-01), Deazawa et al.
patent: 4486496 (1984-12-01), Deazawa et al.
patent: 4501774 (1985-02-01), Miyazawa et al.
patent: 4506000 (1985-03-01), Kubota et al.
patent: 4554606 (1985-11-01), Karashima et al.
patent: 4578280 (1986-03-01), Greiner et al.
patent: 4578313 (1986-03-01), Ito et al.
patent: 4609971 (1986-08-01), Ido et al.
patent: 4624894 (1986-11-01), Kishimoto
patent: 4636433 (1987-01-01), Kubo et al.
patent: 4657816 (1987-04-01), Siddiq
patent: 4671828 (1987-06-01), Yamauchi et al.
patent: 4683012 (1987-07-01), Yamauchi et al.
patent: 4714654 (1987-12-01), Ito et al.
patent: 4735848 (1988-04-01), Kondo et al.
patent: 4743490 (1988-05-01), Fayling
patent: 4755888 (1988-07-01), Hori et al.
patent: 4851258 (1989-07-01), Kuroyama et al.
patent: 4851289 (1989-07-01), Ogawa et al.
patent: 4895758 (1990-01-01), Sakemoto et al.
patent: 4898922 (1990-02-01), Shiraki
patent: 4907103 (1990-03-01), Hiller
patent: 4911997 (1990-03-01), Asai et al.
patent: 4929514 (1990-05-01), Natarajan et al.
patent: 4969962 (1990-11-01), Watanabe et al.
patent: 4981719 (1991-01-01), Schulz et al.
Journal of Applied Physics, vol. 67, No. 9, Part II, pp. 5175-5177.
IEEE Transactions on Consumer Electronics, vol. CE-30, No. 3, pp. 397-401.
"Tribology and Mechanics of Magnetic Storage Devices", Bharat Bhushan, Springer-Verlay, N.Y., 1990, pp. 897-906.
Polymer Preprints, vol. 29, No. 2, Sep. 1988, American Chemical Society, pp. 260-261.
Morthane Resins, Magnetic Mediums, Morton Thiokol, Inc, Chicago, Ill. 60606, undated.
Pfizer Pferromet Line Metallic Particles for Advanced Magnetic Media, Feb. 8, 1985.
Pfizer Pferromet 2000, Kanto Denka Kogyo Co., Ltd. Tokyo, Japan, Feb. 8, 1985.
High Purity Alumina, Sumitomo Chemical Co., Ltd., Osaka and Tokyo, Japan, undated.
Morthane Resins, Morthane CA-118, Morton Thiokol, Inc., Chicago, Ill., 60606, Jan. 1988.
Gafac Surfactants, Technical Bulletin 4220-010, GAF Corp., Chemical Division, New York, N.Y. 10020, undated.

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