Patent ID: 6194596
Filing Date: 2001-02-27
Classification: C08G

Abstract:
A polysiloxane containing carbonate groups and modified with linear polyesters, of the formula I ##STR9##whereR.sup.1 =CH.sub.3 or R.sup.4 --O--CO--O--R.sup.5,R.sup.2 =CH.sub.3 or R.sup.3,R.sup.3 =an alkyl group, wherein up to about 25 mol % of these alkyl groups are optionally replaced by aryl groups and/or arylalkenyl groups,R.sup.4 =(CH.sub.2).sub.n or (CH.sub.2).sub.n --O--(CH.sub.2).sub.m,n, m=2 to 20,R.sup.5 =an aliphatic and/or cycloaliphatic and/or aromatic polyester group containing at least three --COO-- and/or --O--CO-- groups and having not more than one Zerevitinov hydrogen atom and an average molecular weight M.sub.n of from about 200 to about 5000,R.sup.6 =CH.sub.3 or R.sup.4 --O--CO--O--R.sup.5,x=3 to 300 andy=0 to 50,and where the average molecule includes at least one group R.sup.4 --O--CO--O--R.sup.5 and the ratio of the number of groups R.sup.4 --O--CO--O--R.sup.5 to the number x is from about 1:2 to about 1:50.