Polymer compositions containing siloxane-organo-copolymers

A polymer composition, comprising:

• (A) at least one polyurethane polymer and
• (B) at least one siloxane-organic copolymer having 100 to 3000 siloxane units per siloxane segment and at least one organic segment having at least one group selected from ester groups, amide groups, urethane groups, urea groups, and thiourea groups, wherein (B) comprises siloxane-organic copolymers of the formula (1)
• where
• R are identical or different and are monovalent, SiC-bonded hydrocarbyl radicals having 1 to 20 carbon atoms optionally substituted by fluorine or chlorine,
• X are identical or different alkylene radicals which have 1 to 20 carbon atoms and in which nonadjacent methylene units are optionally replaced by —O— groups,
• A are identical or different and are oxygen, sulfur, or an amino group —NR′—,
• Z are identical or different and are oxygen or an amino group —NR′—,
• R′ are identical or different and are hydrogen or an alkyl radical having 1 to 10 carbon atoms,
• Y are identical or different and are divalent hydrocarbyl radical which have 1 to 20 carbon atoms and are optionally substituted by fluorine or chlorine,
• D are identical or different and are divalent hydrocarbyl radicals which are optionally substituted by fluorine, chlorine or C1-C6 alkyl ester groups and in which nonadjacent methylene units are optionally replaced by —O—, —COO—, —OCO— or —OCOO— groups,
• B are identical or different and are hydrogen or a functional or nonfunctional organic or silicon-organic radical,
• n are identical or different and are a number from 99 to 2999,
• a is a number which is at least 1,
• b is 0 or a number from 1 to 100,
• c is 0 or a number from 1 to 100,
• d is a number which is at least 1, and
• e is a number which is 0 or 1.