POLYSILOXANES USED FOR HYDROPHOBING

• Main Authors: HASSEL, TILLMANN, SACKMANN, GUENTER, SCHAEFER, WALTER, NOVOTNY, FRITZ, SCHNEE, MANFRED, REINERS, JUERGEN
• Format: Patent
• Language: English; French; German
• Published: 22.10.2003
• Edition: 7
• Subjects: ADHESIVES; APPARATUS THEREFOR; CHEMICAL PAINT OR INK REMOVERS; CHEMICAL TREATMENT OF HIDES, SKINS OR LEATHER, e.g. TANNING,IMPREGNATING, FINISHING; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COMPOSITIONS BASED THEREON; COMPOSITIONS FOR TANNING; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; CORRECTING FLUIDS; DYES; FILLING PASTES; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR; HIDES; IMPREGNATING OR COATING OF PAPER; INKS; LAUNDERING; LEATHER; MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; PAPER NOT OTHERWISE PROVIDED FOR; PAPER-MAKING; PASTES OR SOLIDS FOR COLOURING OR PRINTING; PELTS; POLISHES; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; PRODUCTION OF CELLULOSE; PULP COMPOSITIONS; SKINS; TEXTILES; THEIR PREPARATION OR CHEMICAL WORKING-UP; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; TREATMENT OF TEXTILES OR THE LIKE; TREATMENT, NOT PROVIDED FOR ELSEWHERE IN CLASS D06, OF FIBRES, THREADS, YARNS,FABRICS, FEATHERS, OR FIBROUS GOODS MADE FROM SUCH MATERIALS; USE OF MATERIALS THEREFOR; WOODSTAINS

The novel polysiloxanes containing cyanourea groups are characterized in that the polysiloxane chain contains at least one structural unit of formula (1) [BRbSiO(3-b)/2]m (1), and optionally contains at least one structural unit of formal (2) [ARaSiO(3-a)/2]k, and/or at least one structural unit of formula (3) [RcSiO(4-c)/2]n, and optionally containing at least one terminal group selected from formulas (4a) R3SiO1/2, (4b) BR2SiO1/2 and (4c) AR2SiO1/2, whereby A, B, R, a, b, c, k, m and n have the meanings cited in the description. The inventive polysiloxanes are especially well-suited for hydrophobing substrates such as paper, textiles, leather and furs.