MICRO-ENCAPSULATED THERMOCHROMIC COMPOSITIONS AND PROCESS FOR PREPARING THE SAME

The invention relates to a micro-encapsulated thermochromic composition and to a process for preparing the same. According to the invention, the composition comprises 15...75% melamine-formaldehyde resin and 25...85% a thermochromic mixture consisting of 0.5...15% termochromic dyestuff, 0.25...30% c...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	RADULY FLORENTINA MONICA, WAGNER LUMINIŢA EUGENIA, RĂDIŢOIU VALENTIN, RĂDIŢOIU ALINA, AMĂRIUŢEI VIORICA
Format:	Patent
Sprache:	eng ; rum
Schlagworte:	ADHESIVES CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS CORRECTING FLUIDS DYEING LEATHER, FURS, OR SOLID MACROMOLECULAR SUBSTANCES INANY FORM DYEING OR PRINTING TEXTILES DYES FILLING PASTES FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR INKS LAUNDERING METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING POLISHES TEXTILES TREATMENT OF TEXTILES OR THE LIKE USE OF MATERIALS THEREFOR WOODSTAINS
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Beschreibung
Zusammenfassung:	The invention relates to a micro-encapsulated thermochromic composition and to a process for preparing the same. According to the invention, the composition comprises 15...75% melamine-formaldehyde resin and 25...85% a thermochromic mixture consisting of 0.5...15% termochromic dyestuff, 0.25...30% colour developing agent, 25...75% solvent, 0.1...5% UV stabilizer and 0.25...10% colour grading agent. The process, as claimed by the invention, consists in preparing the thermochromic mixture as homogeneous melt to be emulsified with an aqueous solution of dispersing agent, in the presence of a protective colloid agent, after which the so-formed emulsion is subjected to encapsulation, the resulting micro-capsules exhibiting total thermochromic transition reversible with the temperature range 25...75°C.