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    • 8. 发明授权
    • Process of surface activation of biocompatible and bioabsorbable
aliphatic polyesters and polyesters thus activated
    • 生物相容性和生物可吸收的脂肪族聚酯和聚酯的表面活化过程由此活化
    • US6107453A
    • 2000-08-22
    • US11320
    • 1998-01-27
    • Alessandro ZuccatoGian Domenico CellaGabriele Perego
    • Alessandro ZuccatoGian Domenico CellaGabriele Perego
    • A61L27/00A61L27/28C08J7/12C08F6/00
    • C08J7/12C08J7/123C08J2367/00
    • A process of surface activation of a material based on one or more of the copolymers of lactic acid and .epsilon.-caprolactone is carried out on bioabsorbable and biocompatible aliphatic polyesters chosen from the group formed by homo- and copolymers derived from L-lactide, D-lactide, racemic D,L-lactide, meso D,L Lactide, .epsilon.-caprolactone, glycolide, .delta.-valerolactone, p-dioxanone, preferably copolymers of L-lactide, D-lactide, racemic D,L lactide, meso D,L-lactide with .epsilon.-caprolactone; the process consists of performing at least one of the following treatments: acid or base hydrolysis, treatment by means of cold plasma, by chemical reactions or electromagnetic radiations.The process brings about a substantial increase in surface hydrophilicity and, consequently, a significant lowering of the wetting angle measured with water at 23 degrees Celsius in air.This can in many cases favor cellular adherence to bioabsorbable medical prostheses realized using these materials, and thus surface-activated, such as for example endothelialisation processes in vascular grafts.
    • PCT No.PCT / IT96 / 00149 Sec。 371日期:1998年1月27日 102(e)日期1998年1月27日PCT提交1996年7月24日PCT公布。 公开号WO97 / 05193 日期1997年2月13日,基于一种或多种乳酸和ε-己内酯的共聚物的材料的表面活化方法是在生物可吸收和生物相容的脂族聚酯上进行的,所述脂族聚酯选自由L衍生的均聚物和共聚物形成的基团 丙交酯,D-丙交酯,外消旋D,L-丙交酯,内消旋D,L丙交酯,ε-己内酯,乙交酯,δ-戊内酯,对二恶烷酮,优选L-丙交酯,D-丙交酯,外消旋D,L丙交酯的共聚物 ,内消旋D,L-丙交酯与ε-己内酯; 该方法包括进行以下处理中的至少一种:酸或碱水解,通过冷等离子体处理,通过化学反应或电磁辐射。 该方法导致表面亲水性的显着增加,并因此导致在空气中在23摄氏度下用水测量的润湿角度的显着降低。 在许多情况下,这可以有利于细胞粘附到使用这些材料实现的生物可吸收的医用假体,并因此有利于表面活化,例如血管移植物中的内皮化过程。
    • 10. 发明申请
    • Energy Cable Comprising a Dielectric Fluid and a Mixture of Thermoplastic Polymers
    • 包含电介质流体和热塑性聚合物混合物的能量电缆
    • US20090211782A1
    • 2009-08-27
    • US12083101
    • 2005-10-25
    • Gabriele PeregoSergio Belli
    • Gabriele PeregoSergio Belli
    • H01B7/00C08L23/12
    • C08L23/10C08L23/14C08L23/142C08L23/16C08L2203/202C08L2205/02C08L2205/03C08L2207/02H01B3/20H01B3/441C08L23/00C08L2666/02C08L2666/06
    • A cable includes at least one electrical conductor and at least one extruded covering layer including a thermoplastic polymer material in admixture with a dielectric liquid, wherein the thermoplastic polymer material includes (a) at least 75% by weight, with respect to the total weight of the thermoplastic polymer material, of at least one copolymer of at least two α-olefin co-monomers, the copolymer having a melting enthalpy lower than 25 J/g; and (b) an amount equal to or less than 25% by weight with respect to the total weight of the thermoplastic polymer material of at least one propylene homopolymer or propylene copolymer with at least one α-olefin, the at least one propylene homopolymer or propylene copolymer having a melting enthalpy higher than 25 J/g and a melting point higher than 130° C. The covering layer has a melting enthalpy equal to or lower than 40 J/g, and the concentration by weight of the dielectric liquid in the thermoplastic polymer material is lower than the saturation concentration of the dielectric liquid in the thermoplastic polymer material.
    • 电缆包括至少一个电导体和至少一个包含与介电液体混合的热塑性聚合物材料的挤压覆盖层,其中热塑性聚合物材料包括(a)至少75重量% 所述热塑性聚合物材料由至少两种α-烯烃共聚单体的共聚物组成,所述共聚物的熔融焓低于25J / g; 和(b)相对于至少一种丙烯均聚物或丙烯共聚物与至少一种α-烯烃的热塑性聚合物材料的总重量相等或小于25重量%的量,至少一种丙烯均聚物或 熔融焓高于25J / g,熔点高于130℃的丙烯共聚物。该覆盖层具有等于或低于40J / g的熔融焓,并且所述介电液体的重量浓度 热塑性聚合物材料低于热塑性聚合物材料中介电液体的饱和浓度。