Abstract:
The present invention relates to thermally expandable thermoplastic microspheres comprising a polymer shell made from ethylenically unsaturated monomers encapsulating a propellant, said ethylenically unsaturated monomers comprising from 21 to 80 wt% of methacrylamide and from 20 to 70 wt% methacrylonitrile, the total amount of methacrylamide and methacrylonitrile being from 70 to 100 wt% of the ethylenically unsaturated monomers. Furthermore, the invention relates to production and use of such microspheres.
Abstract:
In an example of a three-dimensional (3D) printing method, a build material (consisting of an inorganic particle and a polymer attached thereto) is applied. The polymer is a continuous coating having a thickness from about 3 nm to about 1500 nm, or nano-beads having an average diameter from about 3 nm to about 1500 nm. The build material is heated to a temperature from about 5°C to about 50°C below the polymer's melting point. A coalescent dispersion (including a coalescent agent and inorganic nanoparticles) is selectively applied on a portion of the build material, and the applied build material and coalescent dispersion are exposed to electromagnetic radiation. The coalescent dispersion absorbs the electromagnetic radiation and heats up the portion of the build material in contact therewith to fuse the portion of the build material in contact with the coalescent dispersion and to form a layer of a 3D object.
Abstract:
Die Erfindung stellt eine bei mechanischer Verletzung selbstheilende Membran bzw. ein Verfahren zur Herstellung dieser Membran für pneumatische Strukturen mit einem Betriebs-Innendruck von 10 mBar bis 500mBar zur Verfügung, wobei die Membran auf der Druckseite eine Kunststoffschicht aufweist, die mit Blasen im Bereich von Bereich von 10μ - 200μ Durchmesser durchsetzt ist.
Abstract:
Methods of using and repairing seal caps as well as constructions comprising seal caps, including in some embodiments seal caps which may be useful in sealing fasteners that protrude into fuel storage cells in aircraft. In some embodiments, methods include the use of optically translucent seal cap and application of a second quantity of sealant to fill voids observed within the interior of the seal cap after cure of a first quantity of sealant.
Abstract:
The invention relates to a polyamide shaped part which can be obtained by anionic polymerization of a lactam containing microcapsules comprising a capsule core of latent heat-storage material and a polymer as the capsule wall. The invention also relates to a method for producing this shaped part and to its use in vehicle construction, for battery housings, for housings for small electronic units, and for systems for keeping food hot.
Abstract:
A method of producing resin articles from a resin reaction system including an uncured resin material and added radiation activatable matter therein. In one case said matter is microencapsulated catayst and, upon application of ultrasonic energy the catalyst is released to initiate cure of the resin. The catalyst is one which is water insoluble and encapsulated with gelatin. In another case, radiation reactive particles such as iron oxide particles are incorporated in the resin and are caused to heat by application of an alternating magnetic field to cure the resin. The field is generated by annular electromagnetic means (14X) borne by a core member (10X) drawn by a cable (12X) through the pipe (1X) and tube (2X). The process is particularly well suited to a replacement pipe and method of installing the replacement pipe within an existing conduit with the resin being cured by passing appropriate radiation generator through a fluid inside the inflated replacement pipe. The invention is of particular interest in mending leaky sewer pipes and the like as the presence of flowing liquid or the like does not affect the radiation.
Abstract:
The present invention relates to thermally expandable thermoplastic microspheres comprising a polymer shell made from ethylenically unsaturated monomers encapsulating a propellant, said ethylenically unsaturated monomers comprising from 21 to 80 wt% of methacrylamide and from 20 to 70 wt% methacrylonitrile, the total amount of methacrylamide and methacrylonitrile being from 70 to 100 wt% of the ethylenically unsaturated monomers. Furthermore, the invention relates to production and use of such microspheres.
Abstract translation:公开了一种具有优异的耐热性和高泡沫膨胀率的热膨胀性微胶囊,因此可以适用于施加高剪切力的捏合成型,压延成型,挤出成型,注射成型等。 还公开了通过使用热膨胀性微胶囊制造的发泡成型制品。 热膨胀性微胶囊包含由聚合物构成的壳体和以壳体为核心成分的挥发性膨胀剂,其中壳体的温度为200℃时的储能模量(E')为1×10 5 N / m 2以上 ℃,频率为10Hz,储存模量(E')在250℃和10Hz的频率下为1×10 5 N / m 2以上,微胶囊的最大位移量为300μm, 更多通过热机械分析测量。
Abstract:
The invention provides that flexible lining tubes for application to underground pipelines and passageways comprise absorbent material which is impregnated with curable synthetic resin which can be cured when the tube is placed on the pipeline or passageway surface so that a rigid pipe within a pipe is formed. The curing of the resin is controlled by filling the curing agent into micropores or microporous particles which are dispersed throughout the resin. The curing agent is only released when the resin is subjected to applied energy such as sonic and/or heat energy. A preferred method is to include CURIE temperature magnetic particles in the resin and to excite (and thus heat) the magnetic particles by applying an alternating high frequency magnetic field. The heat from the magnetic particles opens the microporous particles and causes desorbence of the curing agent and then cure of the resin. The invention also provides that the curing agent is absorbed into the absorbent layer in the first place using sonic energy.
Abstract:
Die Erfindung betrifft eine Sanierungsvorrichtung (18) zur Sanierung einer Rohrleitung mittels eines Auskleidungselementes (22) aus Harz absorbierendem Material, das mit einem Harzsystem getränkt ist, aufweisend wenigstens eine Aushärtungsvorrichtung (40, 42), die zur Aktivierung des Harzsystems eine Strahlung erzeugt. Ferner betrifft die Erfindung ein Harzsystem zur Tränkung eines Auskleidungselements (22) aus einem Harz absorbierenden Material sowie ein Verfahren zum Auskleiden einer Rohrleitung mittels einer Sanierungsvorrichtung (18) und eines Auskleidungselements (22) aus Harz absorbierendem Material.