Patent ID: 6239244
Filing Date: 2001-05-29
Classification: A61K,C08G,C08L

Abstract:
An addition-crosslinkable polysiloxane material having a long shelf life, which cures to form permanently water-wettable elastomeric vulcanized products, comprising:a) one or more organopolysiloxanes having at least two aliphatic double bonds in the molecule,b) one or more organopolysiloxanes having at least two Si--H groups in the molecule,c) at least one noble metal catalyst, andd) one or more hydrophilic modifier(s) of the general formula I[H.sub.2 C.dbd.CH--A.sup.1 --(A.sup.2).sub.m --X].sub.n B (I),in whichA.sup.1 denotes a divalent C.sub.2 -C.sub.10 -hydrocarbon radical which may be substituted by halogen atoms,A.sup.2 denotes a divalent C.sub.1 -C.sub.24 -hydrocarbon radical which may be interrupted by non-neighboring oxygen atoms, nitrogen atoms, or groups of the formulae --NR--, --CO-- or --CO--NR.sup.1, and may additionally be substituted by halogen atoms, with the proviso that at least 5 carbon atoms are present per oxygen or nitrogen atom,X denotes a divalent group --O--, --CO-- or --COO--,B denotes a polar radical comprising carbon atoms and at least 2 non-neighboring oxygen atoms, the oxygen atoms being present as ether oxygen, or in hydroxyl groups, C.sub.1 -C.sub.4 -acyl groups, or C.sub.1 -C.sub.3 -trialkylsilyl groups, with the proviso that not more than 3 carbon atoms are present per oxygen atom,m denotes the values 0 or 1,n denotes integral values from 1 to 50, andR and R.sup.1 each denote a monovalent C.sub.1 -C.sub.10 -hydrocarbon radical which may be substituted by halogen atoms.