JP2941080B

PURPOSE:To produce the subject resin having a low viscosity, a good anchoring property and durable image stability and useful for toners employed in electronic photography, etc., by stepwisely reacting a mixture of plural polyester resins having specific mol.wts. and OH values, respectively, with a...

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Bibliographic Details
Main Authors MISAWA AKIRA, HATA MASAAKI, KAWABATA TOSHIHIKO, HISAIE SOSHICHI, HISAMATSU KAZUO, ONOBUSA MITSUO
Format Patent
LanguageEnglish
Published 25.08.1999
Edition6
Subjects
ADHESIVES
CHEMICAL PAINT OR INK REMOVERS
CHEMISTRY
CINEMATOGRAPHY
COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS
COMPOSITIONS BASED THEREON
CORRECTING FLUIDS
DYES
ELECTROGRAPHY
ELECTROPHOTOGRAPHY
FILLING PASTES
HOLOGRAPHY
INKS
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
MAGNETOGRAPHY
METALLURGY
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
NATURAL RESINS
ORGANIC MACROMOLECULAR COMPOUNDS
PAINTS
PASTES OR SOLIDS FOR COLOURING OR PRINTING
PHOTOGRAPHY
PHYSICS
POLISHES
THEIR PREPARATION OR CHEMICAL WORKING-UP
USE OF MATERIALS THEREFOR
WOODSTAINS
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Summary:PURPOSE:To produce the subject resin having a low viscosity, a good anchoring property and durable image stability and useful for toners employed in electronic photography, etc., by stepwisely reacting a mixture of plural polyester resins having specific mol.wts. and OH values, respectively, with a specific amount of a diisocyanate under heating. CONSTITUTION:A mixture of (A) a polyester resin having a number-average mol.wt. of 1000-10000, an OH value of <=5 and a Tg of >=40 deg.C with (B) a polyester resin having a number-average mol.wt. of 1000-5000 and an OH value of 10-60 in an A:B mixing ratio of 20:80 to 90:10 is allowed to react with a diisocyanate compound (e.g. tolylene diisocyanate) having 1.03-1.3 moles of NCO group per mole of the OH group in all of the polyesters A and B at 160-220 deg.C in a reaction degree of 80-98% and subsequently at 110-150 deg.C for 10-300min, followed by cooling the solution product to provide the objective urethane-modified polyester resin.
Bibliography:Application Number: JP19910085204