Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...
Patent
1996-07-19
2000-01-04
Wilson, Donald R.
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Mixing of two or more solid polymers; mixing of solid...
430109, 430904, 525225, C08L 3302, C08L 3308, C08L 3310
Patent
active
060111194
ABSTRACT:
A resin composition is provided for an electro-photographic toner. The composition comprises 5 to 95 parts by weight of a high molecular weight vinyl copolymer polymer and 95 to 5 parts by weight of a low molecular weight vinyl copolymer. The former ethylene polymer has a weight average molecular weight (Mw) of from 200,000 to 1,000,000 and a ratio (Mw/Mn) of the weight average molecular weight (Mw) to a number average molecular weight (Mn) of from 8 to 300, and the latter vinyl copolymer has a weight average molecular weight of from 3,000 to 20,000. At least one of the former and latter vinyl copolymer, preferably, the former vinyl copolymer is an ethylene polymer which has been obtained by conducting polymerization in the presence of a monomer having an ionization potential of from 10.0 to 15.0 eV and a difference of from 9.0 to 15.0 eV in level between a highest occupied molecular orbital (HOMO) and a lowest unoccupied molecular orbital (LUMO), both determined by computational chemistry. The resin composition shows excellent charging characteristics even without a charge control agent or with a charge control agent in a reduced amount. A toner containing the resin composition is also provided.
REFERENCES:
patent: 4727010 (1988-02-01), Shin et al.
patent: 4883734 (1989-11-01), Ikeuchi et al.
patent: 5468585 (1995-11-01), Matsumoto et al.
patent: 5744276 (1998-04-01), Ohno et al.
Lee, et al., "The Glass Transition Temperatures of Polymers", Polymer Handbook, Brandkup et al., ed., Joh Wiley & Sons, New York, pp. III/139-142 (1975).
JP61-123,856 Abstract, Accession No. 86-192353, Derwent Information Ltd., (1986).
Hirayama Nobuhiro
Matsumoto Katsuru
Tanaka Eishi
Tobita Junko
Mitsui Chemicals Inc.
Wilson Donald R.
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