发明名称 |
Method for producing a polymerized toner |
摘要 |
Disclosed is a method for producing a polymerized toner, wherein the method comprises: a suspension step of obtaining a suspension in which droplets of a first-stage polymerizable monomer composition containing at least a first-stage polymerizable monomer and a colorant are dispersed, by suspending the first-stage polymerizable monomer composition in an aqueous dispersion medium containing a dispersion stabilizer; a first-stage polymerization step of carrying out suspension polymerization by using the suspension, in the presence of a polymerization initiator; and a second-stage polymerization step of carrying out suspension polymerization by further adding a second-stage polymerizable monomer satisfying the following formula (1), when a polymerization conversion rate in the first-stage polymerization step becomes 20 to 80%:
Tg1>Tg2. Formula (1): |
申请公布号 |
US9454093(B2) |
申请公布日期 |
2016.09.27 |
申请号 |
US201414764277 |
申请日期 |
2014.01.24 |
申请人 |
ZEON CORPORATION |
发明人 |
Kurokawa Hisashi;Hagino Akihide;Taguchi Hiroyuki |
分类号 |
G03G9/08;G03G9/087;G03G9/09 |
主分类号 |
G03G9/08 |
代理机构 |
Westerman, Hattori, Daniels & Adrian, LLP |
代理人 |
Westerman, Hattori, Daniels & Adrian, LLP |
主权项 |
1. A method for producing a polymerized toner, wherein the method comprises:
a suspension step of obtaining a suspension in which droplets of a first-stage polymerizable monomer composition containing at least a first-stage polymerizable monomer and a colorant are dispersed, by suspending the first-stage polymerizable monomer composition in an aqueous dispersion medium containing a dispersion stabilizer; a first-stage polymerization step of carrying out suspension polymerization by using the suspension, in the presence of a polymerization initiator; and a second-stage polymerization step of carrying out suspension polymerization by further adding a second-stage polymerizable monomer satisfying the following formula (1), when a polymerization conversion rate in the first-stage polymerization step becomes 20 to 80%:
Tg1>Tg2 Formula (1):wherein Tg1 is a glass transition temperature (° C.) of a polymer polymerized from the first-stage polymerizable monomer, and Tg2 is a glass transition temperature (° C.) of a polymer polymerized from the second-stage polymerizable monomer. |
地址 |
Tokyo JP |