发明名称 |
PROCESS OF PRODUCING POLYMERIC BINDER FOR TONER |
摘要 |
FIELD: polymer production. ^ SUBSTANCE: invention relates to production of polymeric binders for toner and can be used for copying appliances and printers. Process comprises separate preparation via emulsion polymerization of (i) low-molecule weight copolymer of styrene (alpha-methylstyrene), 2-ethylhexyl acrylate (or butyl acrylate) and methacrylic acid at monomer weight ratio (88-91.5):(8-11):(0.5-1.0) with intrinsic viscosity in toluene 0.08-1.2 dL/g and (ii) high-molecule weight copolymer of styrene (alpha-methylstyrene) and 2-ethylhexyl acrylate (or butyl acrylate) at monomer weight ratio (88-92):(8-12) with intrinsic viscosity in toluene 1.0-1.28 dL/g. In both cases, polymerization is carried out at 60-70% to monomer conversion close to 100%. Resulting latexes of low- and high-molecule weight copolymers are supplemented by stopper and antioxidant and then mixed with each other at "dry" weight ratio between 70:30 and 75:25 and coagulated intrinsic viscosity in toluene 1.0-1.28 dL/g. with electrolyte solutions to form polymer characterized by intrinsic viscosity in toluene 0.4-0.45 dL/g and polydispersity Mw/Mn, which ensures bimodal molecular weight distribution of copolymer. The latter has melting (spreading) point 125-137°C and softening temperature 70-75°C. ^ EFFECT: improved quality of electrographic printing. ^ 2 cl, 1 tbl, 4 ex |
申请公布号 |
RU2304152(C2) |
申请公布日期 |
2007.08.10 |
申请号 |
RU20050133923 |
申请日期 |
2005.11.02 |
申请人 |
OTKRYTOE AKTSIONERNOE OBSHCHESTVO NAUCHNO-ISSLEDOVATEL'SKIJ INSTITUT "JARSINTEZ" (OAO NII "JARSINTEZ");OTKRYTOE AKTSIONERNOE OBSHCHESTVO "KOMPANIJA SLAVICH" |
发明人 |
KOSMODEM'JANSKIJ LEONID VIKTOROVICH;SAL'NIKOV SERGEJ BORISOVICH;PAUTOV PAVEL GRIGOR'EVICH;BESPALOV VLADIMIR PAVLOVICH;POZDYSHEV VLADIMIR IVANOVICH;KHARIN OLEG RODIONOVICH;DERGUNOVA MARINA EHDMAROVNA |
分类号 |
C08F212/08;C08J3/16;C09D11/02 |
主分类号 |
C08F212/08 |
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