Abstract:
Beschrieben wird ein neues Verfahren zur Herstellung von Siloxan-Copolymeren mit Urethansulfonamidoverbindungsgruppen indem in einem ersten Schritt ein mindestens eine Hydroxygruppe aufweisendes organisches Polymer (1) mit Isocyanat (2) der Formel O=C=N-SO 2 X (I) wobei X ein Halogenatom oder eine Pseudohalogenrest ist, umgesetzt wird, mit der Maßgabe, dass das Isocyanat in Mengen von 0,8 bis 1,0 Mol, vorzugsweise 1,0 Mol, 0=C=N-Gruppe in (2) je Mol Hydroxygruppe (-OH) in (1) eingesetzt wird und in einem zweiten Schritt das aus dem ersten Schritt erhaltene mindestens eine Gruppe der Formel -O-C (=O) -NH-SO 2 X aufweisende organische Polymer (3) mit einem mindestens eine primäre oder sekundäre Aminogruppe (-NH-) aufweisenden Organopolysiloxan (4) umgesetzt wird, mit der Maßgabe, dass das Organopolysiloxan (4) in Mengen von 1,2 bis 4,0 Mol, vorzugsweise 2,0 bis 3,0 Mol, Aminogruppe (-NH-) in (4) je Mol -SO2X im Isocyanat (2) eingesetzt wird.
Abstract:
Zusammensetzungen enthaltend (A) Polysiloxancopolymere herstellbar indem in einem 1. Schritt Organopolysiloxane (1), die pro Molekül mindestens ein Si-gebundenes Wasserstoffatom aufweisen, mit weitgehend linearen oligomeren oder polymeren Verbindungen (2) der allgemeinen Formel: R 1 -(A-C n H 2n ) m -A 1 H (I), umgesetzt werden, mit der Maßgabe, dass die m Einheiten (A-C n H 2n ) gleich oder verschieden sein können, und in einem 2. Schritt die so erhaltenen H-A 1 -Gruppen aufweisenden Zwischenprodukte (4) mit organischen Verbindungen (5), die pro Molekül mindestens zwei Isocyanatgruppen aufweisen, sowie gegebenenfalls weiteren Verbindungen (7) umgesetzt werden, (B) Organopolysiloxanharze aus Einheiten der Formel: R 8 g(R 9 O) h SiO (4-g-h)/2 (VI), gegebenenfalls (C) polyethermodifizierte Siloxane, die von (A) verschieden sind, gegebenenfalls (D) organische Verbindungen, gegebenenfalls (E) Wasser und gegebenenfalls (F) Additive, wobei die Reste und Indices die in Anspruch 1 angegebene Bedeutungen haben, Verfahren zu deren Herstellung sowie deren Verwendung als Entschäumer, insbesondere zum Entschäumen wässriger Tensidformulierungen.
Abstract translation:包括(A)聚硅氧烷共聚物的组合物,在第一步骤中的有机聚硅氧烷制备的由(1)每分子具有至少一个Si键合的氢原子与基本上线性的低聚或聚合化合物(2)通式:R 1 - (A-为C n H 2n)后 M-A1H(I),进行反应,其条件是m个单元(a-为C n H 2n个)可以是相同或不同的,并且在第二步骤中,将由此获得的H-A1-基的中间体(4)与有机 进行反应的化合物(5),每分子具有至少两个异氰酸酯基团,和任选的其它化合物(7),(B)有机聚硅氧烷的化学式的单元构成:R8g(R9O)H的SiO(4-GH)/ 2(VI),如果合适的话( C)聚醚改性的硅氧烷,其是不同于(A),任选的(D)有机化合物,任选地(e)水和任选地(F)的添加剂,其中,所述基团和指数具有权利要求1中给出,V的含义 它们的制备和它们作为消泡剂的消泡含水表面活性剂制剂的用途,特别经验。
Abstract:
A polymer is characterized by a repeat unit represented by Structural Formula (I), or a copolymer thereof. A crosslinked polymer characterized by a repeat unit represented by Structural Formula (II), (III), (IV) or (V), or a copolymer thereof, wherein at least one such repeat unit of a first polymer strand is crosslinked with at least one repeat unit of a second polymer strand by at least one bridging unit, the first and second polymer strands and the repeat unit being components of the crosslinked polymer.
Abstract:
The invention relates to composite materials that contain a polymer matrix and aggregates, and in some embodiments, methods of making, and methods of using these materials. Preferably, the aggregates are calcium phosphate aggregates. Preferably, the material is resistant to fracture. In further embodiments, the materials are used in surgical procedures of bone replacement. In further embodiments, the materials contain polyhedral silsesquioxanes and/or biodegradable segments. In further embodiments, the polymer matrix comprises biomolecules.
Abstract:
The present invention relates to silicon-containing biostable gels and processes for their preparation. The gels possess properties which make them useful in the manufacture and repair of biomaterials and medical devices, articles or implants, in particular the manufacture of soft tissue implants such as breast implants and the repair of orthopaedic joints such as spinal discs.
Abstract:
A method for preparing a thermoplastic elastomer is disclosed, said method comprising (I) mixing, (A) a rheologically stable polyamide resin having a melting point or glass transition temperature of 25 DEG C to 275 DEG C, (B) a silicone base comprising (B') 100 parts by weight of a diorganopolysiloxane gum having a plasticity of at least 30 and having an average of at least 2 alkenyl groups in its molecule and (B'') 5 to 200 parts by weight of a reinforcing filler, the weight ratio of said silicone base to said polyamide resin being greater than 35:65 to 85:15, (C) a compatibilizer selected from (I) a coupling agent, (ii) a functional diorganopolysiloxane or (iii) a copolymer comprising at least one diorganopolysiloxane block and at least one block selected from polyamide, polyether, polyurethane, polyurea, polycarbonate or polyacrylate, (D) and organohydrido silicon compound which contains ac average of at least 2 silicon-bonded hydrogen groups in its molecule and (E) a hydrosilation catalyst, components (D) and (E) being present in an amount sufficient to cure said diorganopolysiloxane (B'); and (II) dynamically curing said diorganopolysiloxane (B').
Abstract:
A method for preparing a thermoplastic elastomer is disclosed, said method comprising (I) mixing, (A) a rheologically stable polyamide resin having a melting point or glass transition temperature of 25 DEG C to 275 DEG C, (B) a silicone base comprising (B') 100 parts by weight of a diorganopolysiloxane gum having a plasticity of at least 30 and having an average of at least 2 alkenyl groups in its molecule and (B'') 5 to 200 parts by weight of a reinforcing filler, the weight ratio of said silicone base to said polyamide resin being greater than 35:65 to 85:15, (C) a compatibilizer selected from (I) a coupling agent, (ii) a functional diorganopolysiloxane or (iii) a copolymer comprising at least one diorganopolysiloxane block and at least one block selected from polyamide, polyether, polyurethane, polyurea, polycarbonate or polyacrylate, (D) and organohydrido silicon compound which contains ac average of at least 2 silicon-bonded hydrogen groups in its molecule and (E) a hydrosilation catalyst, components (D) and (E) being present in an amount sufficient to cure said diorganopolysiloxane (B'); and (II) dynamically curing said diorganopolysiloxane (B').
Abstract:
This invention relates to polymers having enhanced durable hydrophilicity and rewetting properties. The polymer has bonded thereto a hydrophilic copolymer. The copolymer comprises the reaction product of a primary hydroxylate having rewetting properties and a silane. The aliphatic polyamide or polyester polymer has an affinity for the hydrophilic copolymer and has substantially no polymerization with the hydrophilic copolymer. The present invention also provides a process of treating polymers to impart hydrophilicity and rewetting properties.