摘要:
The present invention provides a method for the preparation of a cross-linked hydrophilic coating of a hydrophilic polymer on a substrate polymer surface of a medical device, involving the use of a polymer solution comprising 1-20% by weight of a hydrophilic polymer, 0-5% by weight of additive(s), and the balance of a vehicle with plasticizing effect on the hydrophilic polymer, wherein the vehicle comprises at least one plasticizer having a solubility in water of at least 6 g/L, a boiling point above 210°C at 760 mmHg, and Hansen δH parameter of less than 20. Furthermore, the invention provides a medical device, e.g. a catheter or guide wire, provided with such a hydrophilic coating. The invention also provides the use of specific polymer solution for the preparation of a cross-linked hydrophilic coating.
摘要:
A hydrophilic coating comprising a polymer containing a hydrophilic prepolymer containing reactive sites cross-linked through polymerisation of vinylic unsaturated groups, said coating comprising a water soluble compound shows a significantly increased water retention and lower friction coefficient when wet.
摘要:
Die vorliegende Erfindung betrifft wässrige Zubereitungen, enthaltend:
i) wenigstens ein filmbildendes Polymer A, aufgebaut aus ethylenisch ungesättigten Monomeren M, das in der wässrigen Zubereitung in dispers verteilter Form vorliegt, wobei die Monomere M wenigstens ein monoethylenisch ungesättigtes Monomer M1 der allgemeinen Formel I worin X, R 1 , R 2 und R 3 die in Anspruch 1 angegebenen Bedeutungen besitzen ii) wenigstens eine Verbindung B, die zwei oder mehrere Aldehydgruppen aufweist, für die Beschichtung von Substraten auf der Basis von Polyurethanen.
摘要翻译:含水制剂,其含有:(i)具有衍生自具有不饱和取代基的脲,硫脲或咪唑烷-2-酮的单体单元的成膜共聚物; 和(ii)具有2个或更多个醛基的化合物用于涂覆基于聚氨酯(PU)的基材。 要求使用用于涂覆PU基底材料的水性制剂。 这些制剂包含:(i)衍生自包含式(I)的单体(M1)和共聚单体(M2)的不饱和单体(M))的分散的成膜聚合物(A); 和(ii)具有两个或多个醛基的化合物(B),其中:R 1,R 2 = H或1-5C烷基或R 1 + R 2可以形成 任选被1或2个1-5C烷基,1-4C烷氧基和/或羟基取代的2-4C亚烷基; X =氧或硫; R 3 = 2-20C单不饱和残基。 还包括以下独立权利要求:(a)通过将这些制剂施用于基材来涂覆防水PU基底物的方法; (b)含有10-50重量%聚合物(A),0.05-5重量%化合物(B)(基于A),10-70重量%无机填料和/或颜料,0.1重量% -20重量%的常规添加剂等和水至100重量%,其中(A)是70-95重量%的丙烯酸正丁酯和/或2-乙基己酯的共聚物,5-25重量%的苯乙烯, 甲基丙烯酸甲酯和/或甲基丙烯酸叔丁酯,0.1-5重量%的单体M1和0.1-5重量%的单体M3。
摘要:
A foamed plastic and a method for its production are described. The foamed plastic has cavities which consist of open cells or pores. In at least a portion of the cavities, particles of water-insoluble hydrophilic polymer are homogeneously distributed, the particles being swellable to a gel in water. Examples of such polymer particles are granules of cross-linked dextran. The polymer particles are incorporated in the foamed plastic by being suspended in a liquid impregnating agent, such as ethanol-chloroform which is of substantially the same density as the polymer particles. A water-soluble binder, such as polyvinyl pyrrolidone, is also dissolved in the impregnating agent, and suitably also a plasticizing and surface active agent, such as a poloxamer. The foamed plastic is impregnated with the liquid suspension, whereafter the impregnating liquid is removed by drying. The polymer particles are anchored to the dried foamed plastic by means of the binder, whereas the polymer particles, on use of the foamed plastic product for, for example, treating a running sore, swell to form a gel such that they fill out the cavities of the foamed plastic and are retained because of steric hindrance. The foamed plastic product is int.al. usable as a bandage and/or for plugging to drain exudate from injured skin surfaces, such as running sores, and in the treatment of incontinence. Also non-clinical fields of use, such as the use of gel iodophore-provided foamed plastic for water purification, are included in the invention.
摘要:
A water-barrier laminate having a water-trapping layer 1 in which a hygroscopic agent is dispersed, wherein a hygroscopic agent has such a hygroscopic property that the ratio (Ax/Ay) of a hygroscopic amount Ax at a relative humidity of 80% and a hygroscopic amount Ay at a relative humidity of 30% is not less than 3, and the water-trapping layer is positioned between the two inorganic barrier layers 3a and 3b. The water-barrier laminate exhibits barrier property against the water over extended periods of time.