US4686166A
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US
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Electrophoto toner comprising imido group monomer unit in polymer
Assignee: Resonac Corp
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Filing: 1986-10-06
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Granted: 1987-08-11
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Expires: 2006-10-06
Abstract
Abstract A toner for developing latent electrostatic images comprising a copolymer having as an essential component a monomer unit derived from an imido group-containing unsaturated monomer of the formula: ##STR1## wherein R 1 , R 2 and R 3 are as defined in the specification, has excellent properties such as resistance to adhesion to plasticized polyvinyl chloride, high image density, resistance to fogging, etc.
Inventors
- 👤 Yuugo Kumagai
- 👤 Isamu Moribe
- 👤 Takayuki Saito
- 👤 Toshiyuki Fujita
- 👤 Akihiro Kobayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:48
CPC Classifications
C; C08; C08F; C08F20/00; C08F20/02; C08F20/10; C08F20/34; C08F20/36; G; G03; G03G; G03G9/00; G03G9/08; G03G9/087; G03G9/08702; G03G9/08726; G03G9/08728; G03G9/0874; Y; Y10; Y10S; Y10S430/00; Y10S430/001; Y10S430/105
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
151 words
A toner for developing latent electrostatic images comprising as a binder polymer a polymer having as an essential component a monomer unit derived from an imido group-containing unsaturated monomer represented by the formula: ##STR36## wherein R 1 is hydrogen or a methyl group; R 2 is an alkylene group having 1 to 6 carbon atoms or a divalent organic group having an alicyclic or aromatic ring; and R 3 is a group represented by the formula: ##STR37## wherein Y 1 , Y 2 , Y 3 , Y 4 , Y 5 , Y 6 , Y 7 , and Y 8 are independently hydrogen, an alkyl group having 1 to 3 carbon atoms, a halogen, ##STR38## in which Z 1 , Z 2 , Z 3 , Z 4 and Z 5 are independently hydrogen or an alkyl group having 1 to 5 carbon atoms; and Y 9 is ##STR39##
Claim 2
Dependent Claim
151 words
A toner for developing latent electrostatic images comprising as a binder polymer a polymer having as an essential component a monomer unit derived from an imido group-containing unsaturated monomer represented by the formula: ##STR36## wherein R 1 is hydrogen or a methyl group; R 2 is an alkylene group having 1 to 6 carbon atoms or a divalent organic group having an alicyclic or aromatic ring; and R 3 is a group represented by the formula: ##STR37## wherein Y 1 , Y 2 , Y 3 , Y 4 , Y 5 , Y 6 , Y 7 , and Y 8 are independently hydrogen, an alkyl group having 1 to 3 carbon atoms, a halogen, ##STR38## in which Z 1 , Z 2 , Z 3 , Z 4 and Z 5 are independently hydrogen or an alkyl group having 1 to 5 carbon atoms; and Y 9 is ##STR39##
Claim 3
Dependent Claim
16 words
A toner according to claim 1, which further comprises one or more colorants and/or magnetic powders.
Claim 4
Dependent Claim
41 words
A toner according to claim 1, wherein the monomer unit derived from the imido group-containing unsaturated monomer of the formula (I) is present in an amount of 5% by weight or more based on the total weight of the binder polymer.
Claim 5
Dependent Claim
41 words
A toner according to claim 1, wherein the monomer unit derived from the imido group-containing unsaturated monomer of the formula (I) is present in an amount of 10 to 90% by weight based on the total weight of the binder polymer.
Claim 6
Dependent Claim
187 words
A toner according to claim 1, wherein the polymer is a copolymer of 5% by weight or more of the imido group-containing unsaturated monomer of the formula (1) and 0.05 to 20% by weight of a compound of the formula: ##STR40## wherein R 1 is hydrogen or a methyl group; R 2 is an alkylene group having 1 to 6 carbon atoms or a divalent organic group having an alicyclic or aromatic ring; and R 4 and R 5 are independently an alkyl group having 1 to 6 carbon atoms, or a group of the formula: ##STR41## wherein R 6 is an alkylene group having 1 to 6 carbon atoms; R 7 is an alkyl group having 1 to 6 carbon atoms; n is zero or an integer of 1 to 5; and m is zero or an integer of 1 to 10, provided that the total number of carbon atoms of R 2 , R 4 and R 5 is 4 or more, and when a ring is substituted with 2 or more R 7 s, the R 7 s may be the same or different.
Claim 7
Dependent Claim
123 words
A toner according to claim 1, wherein the polymer is a copolymer of 5% by weight or more of the imido group-containing unsaturated monomer of the formula (I) and 5 to 50% by weight of a compound of the formula: ##STR42## wherein R 8 , R 9 , R 10 and R 11 are independently hydrogen, an alkyl group having 1 to 6 carbon atoms, a hydroxyl group, ##STR43## (in which R 12 is an alkyl group having 2 to 18 carbon atoms), or ##STR44## (in which R 13 is an alkylene group having 1 to 6 carbon atoms; and R 14 is an alkyl group having 2 to 18 carbon atoms), and at least two ester linkages are present in the molecule.
References Cited (Backward Citations)
US4628019A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-08-10 | 1991-02-09 | 1991-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-10 | 1995-02-09 | 1995-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-10 | 1999-02-09 | 1999-08-11 | $7700.00 | Window Closed / Lapsed |