Claims
- 1. A process for forming images which comprises developing latent electrostatic images and thermally fixing the resulting images with use of a fixing apparatus having a heat-roller, wherein said latent electrostatic images are developed with a toner comprising a binder, a polyolefin and a coloring agent, said binder consisting essentially of 99.5 to 92 parts by weight of a vinyl monomer graft-polymerized to 0.5 to 8 parts by weight of an unsaturated polyester, and said unsaturated polyester being a condensation product of a polybasic acid containing 20 to 80 mol percent of an unsaturated dibasic acid and a corresponding amount of a polyvalent alcohol, said binder having a softening point of 120.degree. to 160.degree. C., a glass transition point of 50.degree. to 80.degree. C. and a melt viscosity of 10.sup.4 to 10.sup.7 poises at a temperature of 140.degree. C., said polyolefin having a softening point of 100.degree. to 180.degree. C., said unsaturated polyester having a number average molecular weight of 1,000 to 15,000 and a weight average molecular weight of 5,000 to 30,000, as measured by gel permeation chromatography, and said vinyl monomer being a mixture of 60 to 90 mol % of styrene and 40 to 10 mol % of an acrylic acid ester and/or a methacrylic acid ester.
- 2. A process according to claim 1, wherein said polyvalent alcohol is a polyoxyethylene bisphenol A.
- 3. A process according to claim 1, wherein said polybasic acid is a terephthalic acid.
- 4. A process according to claim 1, wherein said unsaturated dibasic acid is a maleic acid or a fumaric acid.
Priority Claims (1)
Number |
Date |
Country |
Kind |
57-155822 |
Sep 1982 |
JPX |
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Parent Case Info
This application is a continuation of application Ser. No. 051,208, filed May 18, 1987, now abandoned, which was a continuation of application Ser. No. 913,640, filed Sept. 30, 1986, now abandoned, which was a continuation of application Ser. No. 833,534, filed Feb. 12, 1986, now abandoned, which was a continuation of application Ser. No. 528,844, filed Sept. 2, 1983, now abandoned.
US Referenced Citations (9)
Foreign Referenced Citations (2)
Number |
Date |
Country |
60339 |
Apr 1982 |
JPX |
171345 |
Oct 1982 |
JPX |
Continuations (4)
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Number |
Date |
Country |
Parent |
51208 |
May 1987 |
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Parent |
913640 |
Sep 1986 |
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Parent |
833534 |
Feb 1986 |
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Parent |
528844 |
Sep 1983 |
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