US4634651A
Expired / Lapsed
US
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Non-aqueous type resin and electrophotographic developer containing the same
Assignee: Ricoh Co Ltd
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Filing: 1985-08-23
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Granted: 1987-01-06
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Expires: 2005-08-23
Abstract
Abstract This invention relates to a non-aqueous type resinous composition obtained by polymerizing a polymerizable composition containing at least monomer A represented by the general formula (I), ##STR1## (wherein R represents --H or --CH 3 , X representing --COOC n H 2n+1 or --O--CO--C n H 2n+1 , and n representing an integer of 6-20) and monomer B represented by the general formula (II), ##STR2## (wherein R represents --H or --CH 3 , n representing an integer of 1-20, and M representing --H, Na, K, Mg, Mn, Ca, Li, Al or Co) in the presence of a polymerization initiator in an aliphatic hydrocarbon solvent.
Inventors
- 👤 Makoto Okawara
- 👤 Kazuo Tsubuko
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:09
CPC Classifications
G; G03; G03G; G03G9/00; G03G9/08; G03G9/12; G03G9/13; G03G9/131; C; C08; C08F; C08F212/00; C08F212/34; C08F212/36; C08F218/00; C08F218/02; C08F220/00; C08F220/02; C08F220/10; C08F220/12; C08F220/16; C08F220/18; C08F220/1812; C08F220/1818; C08F220/26; C08F220/28; C08F220/283
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
123 words
A non-aqueous resin dispersion obtained by polymerizing, under suspension polymerization conditions, a copolymerizable monomer composition mixed in an aliphatic hydrocarbon solvent, in the presence of a polymerization initiator, said copolymerizable monomer composition containing monomer A having the formula ##STR6## wherein R is H or CH 3 , X is COOC n H 2n+1 or OCOC n H 2n+1 and n is an integer of from 6 to 20, and monomer B having the formula ##STR7## wherein R 1 , is H or CH 3 , n 1 is an integer of from 1 to 20, m is an integer of from 1 to 3, and R 2 selected from the group consisting of H, Na, K, Mg, Mn, Ca, Li, Al and Co.
Claim 2
Dependent Claim
123 words
A non-aqueous resin dispersion obtained by polymerizing, under suspension polymerization conditions, a copolymerizable monomer composition mixed in an aliphatic hydrocarbon solvent, in the presence of a polymerization initiator, said copolymerizable monomer composition containing monomer A having the formula ##STR6## wherein R is H or CH 3 , X is COOC n H 2n+1 or OCOC n H 2n+1 and n is an integer of from 6 to 20, and monomer B having the formula ##STR7## wherein R 1 , is H or CH 3 , n 1 is an integer of from 1 to 20, m is an integer of from 1 to 3, and R 2 selected from the group consisting of H, Na, K, Mg, Mn, Ca, Li, Al and Co.
Claim 3
Dependent Claim
23 words
A non-aqueous resin dispersion as claimed in claim 1 in which the weight ratio of (monomer A/monomer B) is from (0.01/1) to (1/1).
Claim 4
Dependent Claim
27 words
The non-aqueous resin dispersion as claimed in claim 1, wherein said copolymerizable monomer composition further contains a copolymerizable monomer C different from monomer A and monomer B.
Claim 5
Dependent Claim
20 words
The non-aqueous resin dispersion as claimed in claim 3, wherein the weight ratio of monomer B:monomer C:monomer A is 0.01-1:0.01-1:1.
Claim 6
Dependent Claim
30 words
The non-aqueous resin dispersion as claimed in claim 3, wherein said resin dispersion further contains at least one substance selected from the group consisting of powdery silica, wax and polyolefin.
Claim 7
Dependent Claim
113 words
A non-aqueous resin dispersion comprising a copolymer dispersed in an aliphatic hydrocarbon solvent, said copolymer comprising recurring units of monomer A having the formula ##STR8## wherein R is H or CH 3 , X is COOC n H 2n+1 or OCOC n H 2n+1 and n is an integer of from 6 to 20, and recurring units of monomer B having the formula ##STR9## wherein R 1 , is H or CH 3 , n 1 is an integer of from 1 to 20, m is an integer of from 1 to 3, and R 2 is selected from the group consisting of H, Na, K, Mg, Mn, Ca, Li, Al and Co.
Claim 8
Dependent Claim
113 words
A non-aqueous resin dispersion comprising a copolymer dispersed in an aliphatic hydrocarbon solvent, said copolymer comprising recurring units of monomer A having the formula ##STR8## wherein R is H or CH 3 , X is COOC n H 2n+1 or OCOC n H 2n+1 and n is an integer of from 6 to 20, and recurring units of monomer B having the formula ##STR9## wherein R 1 , is H or CH 3 , n 1 is an integer of from 1 to 20, m is an integer of from 1 to 3, and R 2 is selected from the group consisting of H, Na, K, Mg, Mn, Ca, Li, Al and Co.
Claim 9
Dependent Claim
16 words
A liquid developer for electrophotography containing the non-aqueous resin dispersion of claim 1, and a pigment.
Claim 10
Dependent Claim
16 words
A liquid developer for electrophotography containing the non-aqueous resin dispersion of claim 3, and a pigment.
Claim 11
Dependent Claim
16 words
A liquid developer for electrophotography containing the non-aqueous resin dispersion of claim 4, and a pigment.
Claim 12
Dependent Claim
16 words
A liquid developer for electrophotography containing the non-aqueous resin dispersion of claim 5 and a pigment.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-01-05 | 1990-07-07 | 1991-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-01-05 | 1994-07-07 | 1995-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-01-05 | 1998-07-07 | 1999-01-06 | $7700.00 | Window Closed / Lapsed |