Patent EP0195604A2 successfully refreshed from Google Patents.
EP0195604A2
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EP
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Production of polyester and toner containing the same
Assignee: Kao Corp
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Filing: 1986-03-13
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Granted: —
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Expires: 2006-03-13
Abstract
Abstract A polyester to use for an electrophotographic toner composition is obtained by copolycondensation between (a) a diol component of polyoxyalkylene-bis(4-hydroxyphenyl)-propane and (b) an acid component, improved by incorporating into the acid component a copolymer of styrene or a derivative thereof and a carboxylic vinlyl monomer. Instead a copolymer of an unsaturated aliphatic hydrocarbon and an unsaturated carboxylic acid and a polymer and copolymer of an unsaturated carboxylic acid may be used. The toner is improved in prevention of off-set in the fixation step.
Inventors
- 👤 Kuniyasu Kawabe
- 👤 Shinichiro Yasuda
- 👤 Hideyo Nishikawa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 00:18
CPC Classifications
C; C08; C08G; C08G63/00; C08G63/66; G; G03; G03G; G03G9/00; G03G9/08; G03G9/087; G03G9/08742; G03G9/08755; Y; Y10; Y10S; Y10S430/00; Y10S430/001; Y10S430/105
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
167 words
A process for producing a polyester by copolycondensing: (a) a diol component of the formula (I): in which R is an ethylene or propylene group and x and y are each an integer of at least 1, the total of x and y being 2 to 7 on the average, with (b) an acid component of a polycarboxylic acid, an anhydride thereof or a lower alkyl ester thereof, containing (II) a polycarboxylic copolymer of a styrene compound selected from alpha-methylstyrene and a compound of the formula (IIa): in which R1 is hydrogen or a hydrocarbon group having 1 to 3 carbon atoms, and a carboxylic group-having vinyl monomer of the formula (IIb), an anhydride thereof or a lower alkyl ester thereof: in which R2 and R3 are each hydrogen, methyl or carboxyl group or (IV) a copolymer of an unsaturated aliphatic hydrocarbon (IVa) having 2 to 21 carbon atoms and an unsaturated carboxylic acid (IVb) or (V) a polymer or compolymer of an unsaturated carboxylic acid (IVb).
Claim 2
Dependent Claim
21 words
-2-A process as claimed in claimed 1, in which said acid component contains 0.05 to 70 mol percent of said copolymer.
Claim 3
Dependent Claim
54 words
-3-A process as claimed in Claim 1, in which said acid component comprises 1 to 50 mol percent of an alkyl- or alkenyl-succinic acid of the formula ( II I), an anhydride thereof or a lower alkyl ester thereof: in which R4 is an alkyl or alkenyl group having 4 to 18 carbon atoms.
Claim 4
Dependent Claim
25 words
-4-A process as claimed in Claim 1, in which the molar ratio of said styrene compound to said vinyl monomer ranges from 1:1 to 5:1.
Claim 5
Dependent Claim
34 words
-5-A process as claimed in Claim 1, in which said acid component comprises fumaric acid, maleic acid, succinic acid, adipic acid, suberic acid, azelaic acid, sebacic acid, terephthalic acid, isophthalic acid or 2,6-naphthalene-dicarboxylic acid.
Claim 6
Dependent Claim
18 words
-6-A process as claimed in Claim 1, in which R1 of the formula (IIa) is an alkyl group.
Claim 7
Dependent Claim
26 words
A process as claimed in Claim 1, in which said vinyl monomer is selected from maleic acid, fumaric acid, acrylic acid, methacrylic acid and itaconic acid.
Claim 8
Dependent Claim
30 words
v -8-A process as claimed in Claim 1, in which said vinyl monomer is a lower alkyl ester of the same having 1 to 4 carbon atoms in the alkyl.
Claim 9
Dependent Claim
29 words
-9-A process as claimed in Claim 1, in which said acid component is a lower alkyl ester of the same having 1 to 4 carbon atoms in the alkyl.
Claim 10
Dependent Claim
19 words
-10-A process as claimed in Claim 1, in which said copolymer has a molecular weight of 1500 to 4000.
Claim 11
Dependent Claim
16 words
-11-A process as claimed in Claim 1, in which said acid component contains the copolymer (II).
Claim 12
Dependent Claim
22 words
-12-A process as claimed in Claim 1, in which said acid component contains the copolymer (IV) or the polymer or copolymer (V).
Claim 13
Dependent Claim
59 words
A process as claimed in Claim 1, in which said unsaturated aliphatic hydrocarbon (IVa) is a compound of the formula: in which R1 and R3 each are hydrogen or an alkyl group having 1 to 12 carbon atoms, R2 is an alkyl group having 1 to 12 carbon atoms or R1 and R2 may be connected with each other.
Claim 14
Dependent Claim
38 words
-14-A process as claimed in Claim 1, in which said unsaturated carboxylic acid (IVa) is a compound of the formula: in which R4 and R5 each are hydrogen or an alkyl group having 1 to 12 carbon atoms.
Claim 15
Dependent Claim
22 words
A process as claimed in Claim 1, in which said copolymer (II), (IV) or (V) further comprises units of a third monomer.
Claim 16
Dependent Claim
12 words
-16-A polyester as obtained in the process as claimed in Claim 1.
Claim 17
Dependent Claim
24 words
-17-A polyester as claimed in Claim 16, which has a softening point of 90 to 180°c, dertermined according to the ring and ball method.
Claim 18
Dependent Claim
16 words
A toner composition which comprises the polyester as claimed in Claim 16 and a coloring matter.
Claim 19
Dependent Claim
31 words
-19-A toner composition as claimed in Claim 18, which further comprises 30 to 70 percent by weight of a magnetic powder having an average particle size of 0.05 to 1 micron.
References Cited (Backward Citations)
No citation records indexed.
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