GELES COM PROPRIEDADES TERMOTROPICAS

Gels for thermotropic sheets are claimed which are obtd. by light-radiation of a mixt. comprising (A) a non-crosslinked polymer (pref. 5-40 wt.%); (B) a radically-polymerisable monomer (pref. 1-30 wt.%); and (C) water and/or an org. solvent (pref. 30-94 wt.%). Pref. a photoinitiator is opt. also pre...

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Bibliographische Detailangaben
Hauptverfasser:	EKKEHARD JAHNS, MANFRED MIELKE, HUBERTUS KRONER
Format:	Patent
Sprache:	por
Schlagworte:	ADHESIVES CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY COMPOSITIONS BASED THEREON DYES LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS ORGANIC MACROMOLECULAR COMPOUNDS PAINTS PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL POLISHES THEIR PREPARATION OR CHEMICAL WORKING-UP THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	Gels for thermotropic sheets are claimed which are obtd. by light-radiation of a mixt. comprising (A) a non-crosslinked polymer (pref. 5-40 wt.%); (B) a radically-polymerisable monomer (pref. 1-30 wt.%); and (C) water and/or an org. solvent (pref. 30-94 wt.%). Pref. a photoinitiator is opt. also present. Polymer (A) has transparency changes in a 10 wt.% aq. and/or org. solvent soln. and is poly-N-vinylcaprolactam, a copolymer contg. at least 20 wt.% N-vinylcaprolactam, or a polyvinylether. Monomer (B) forms a 3-D network on light-irradiation and ether does not have thermotropic properties of the type specified above or has such properties at at least 20 degrees C above the switching region for polymer (A). (C) is water.