公开(公告)号：PT678534E

公开(公告)日：2000-12-29

申请号：PT95105709

申请日：1995-04-15

Applicant: BASF AG

Inventor： HUBERTUS KRONER DR ,  EKKEHARD JAHNS DR ,  MIELKE MANFRED

IPC: B32B17/10 ,  C08F2/44 ,  C08F2/48 ,  C08F261/06 ,  C08F271/00 ,  B01J13/00 ,  C08F291/00 ,  C09K9/02

Abstract: 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.