Patent ID: 8304023

Claim:
A process for treating fiberfill fibers, comprising contacting the fibers with an aqueous dispersion of partially crosslinked solid organopolysiloxane particles obtained by reaction of organopolysiloxanes (1) comprising condensation-capable groups and units of the formula R a ⁡ ( OR 1 ) b ⁢ SiO 4 - ( a + b ) 2 ( 1 ) where R is a hydrogen atom or a monovalent hydrocarbyl moiety of 1 to 18 carbon atoms which is optionally substituted with the heteroatoms N and/or O, R 1 is a hydrogen atom or an alkyl moiety with 1 to 8 carbon atoms, a is 0, 1, 2 or 3, and b is 0, 1 or 2, with the proviso that the sum a+b is ≦3 and the organopolysiloxane (1) contains on average at least one OR 1 moiety per molecule, with silanes (2) of the formula (R 3 O) 3 SiCR 2 2 —Y (II) or their hydrolyzates, where R 2 is a hydrogen atom or a monovalent alkyl moiety of 1 to 4 carbon atoms, R 3 is an alkyl moiety having 1 to 8 carbon atoms per moiety, Y is a moiety of the formula —NHR 4 , —NR 4 2 or —NR 5 , where R 4 is a monovalent hydrocarbyl moiety of 1 to 18 carbon atoms which optionally contains nitrogen and/or oxygen atoms, and R 5 is a divalent hydrocarbyl moiety of 3 to 12 carbon atoms which optionally contains nitrogen and/or oxygen atoms, in the presence of water (3), emulsifier (4) and optionally further silanes (5) of the formula (R 3 O) x R 3-x Si—R 6 —Z (III) or their hydrolyzates, where R 6 is a divalent hydrocarbyl moiety of 3 to 18 carbon atoms and Z is a moiety selected from the group consisting of amino or aminoalkylamino moieties, epoxy moieties and (meth)acryloyloxy radicals, and x is 1, 2 or 3, and optionally further materials (6) which do not take part in the reaction of organopolysiloxane (1) with silane (2), wherein silane (2) is used in such amounts that 0.6 to 2 equivalents of —OR 3 are present per equivalent of —OR 1 in organopolysiloxane (1), and with the proviso that no metal-containing catalysts are used and that the organopolysiloxanes (1) and silanes (2) are used in such amounts that the organopolysiloxane particles, after removal of water (3), form crosslinked elastomeric films insoluble in toluene.