Abstract:
The present invention relates to a process for preparing a porous material, at least comprising the steps of providing a mixture (I) comprising a composition (A) comprising at least one monool (am) and a composition (A*) comprising components suitable to form an organic gel and a solvent (B), reacting the components in the composition (A) in the presence of the solvent (B) to form a gel, and drying of the gel obtained in step b). The invention further relates to the porous materials which can be obtained in this way and the use of the porous materials as thermal insulation material and in vacuum insulation panels, in particular in interior or exterior thermal insulation systems.
Abstract:
The present invention relates to the fields of polymers and porous adsorbents. In particular the present invention relates to polymers of crosslinked silsesquioxane units of the formula (RSi0 3/2 ) n wherein n may be 6, 8, 10 or 12 or a mixture thereof; R is a substituent, each R of the n R within the formula (RSi0 3/2 ) n may be the same or different. The present invention relates also to methods of producing said polymers, e.g. by way of radical polymerisation. Finally, the present invention relates to adsorbent materials comprising said polymers and the technical application of said polymers and adsorbent materials for different technical purposes such as flow-through applications, micro-fluidic applications, gas storage/separation, solid phase extraction, or catalysis.
Abstract:
The present invention is core-shell polymer particles comprising a common binder polymer for the core and the shell wherein the core has a porosity and the shell is non-porous The particles have a porosity from 10 to 70 percent.
Abstract:
The present invention provides a macroporous copolymer having large pores, typically in the range of 5,000 - 200,000 A and a typical breaking weight of at least 175 g/bead. The macroporous copolymers can be made using an interpenetrating polymer network (IPN) techniques. These macroporous copolymers may also form macroporous resins. The present invention also provides methods of using the macroporous copolymers and resins.
Abstract:
Nanoporöser Polymerschaumstoff mit einem mittleren Porendurchmesser im Bereich von 10 bis 1000 nm, erhältlich nach einem Verfahren, umfassend die Stufen a) Bereitstellen einer Lösung eines Polykondensations-Reaktivharzes in einem organischen Lösungsmittel, b) Vermischen der Lösung mit einem Härtungskatalysator für das Polykondensations-Reaktivharz und härten der Reaktivkomponenten unter Bildung eines Gels und c) Entfernen des organischen Lösungsmittels, sowie Verwendung zur Wärmedämmung.
Abstract:
The present invention relates to cross-linked polyolefin aerogels in simple and fiber-reinforced composite form. Of particular interest are polybutadiene aerogels. Especially aerogels derived from polybutadienes functionalized with anhydrides, amines, hydroxyls, thiols, epoxies, isocyanates or combinations thereof.
Abstract:
Process for making polyisocyanate based xerogels by trimerisation of an organic polyisocyanate in an organic solvent in the presence of a (co)polymer containing an isocyanate-reactive group, gellation and drying of the obtained sol-gel.
Abstract:
A novel microporous isocyanate-based xerogel composition is disclosed. The composition can be prepared by a process characterized by (1) admixing (a) a polyisocyanate component, (b) a substantially unreactive solvent, and, optionally, (c) a polymerization catalyst, water, an active-hydrogen compound or a mixture thereof, provided that (c) is included wherein (b) does not also function to catalyze polymerization; under reaction conditions sufficient to form a gel; and (2) removing the solvent under non-supercritical conditions sufficient to form a microporous xerogel composition. The compositions can be readily evacuated for use in thermal insulative applications such as vacuum panels, for uses such as appliance insulation, which show superior K-factor values when compared with, for example, conventional rigid polyurethane open-cell foams as used in similar applications.
Abstract:
To provide a dispersion liquid including a (A) fiber material dispersed satisfactorily and stably and being capable of forming a porous film having high porosity, a porous film formed using the dispersion liquid, a power storage element including the porous film, and a method for producing a porous film using the dispersion liquid. In a dispersion liquid including the (A) fiber material and an (B) organic solvent, which is used for forming a porous film by applying and drying, the (A) fiber material is allowed to contain a predetermined amount of a modified cellulose fiber including a carboxy group or a metal salt thereof, and the amount of water in the dispersion liquid is made to be 5% by mass or less.
Abstract:
Methods for making polymer particles in gel form via an emulsion and/or suspension polymerization are provided. In at least one specific embodiment, the method can include reacting a first reaction mixture comprising a phenolic monomer, an aldehyde monomer, and a first catalyst to produce a prepolymer. The method can also include combining the prepolymer with a carrier fluid and a second catalyst to produce a second reaction mixture. The second catalyst can include a dicarboxylic acid, an anhydride, a dihydroxybenzene, or any mixture thereof. The method can also include polymerizing the prepolymer to form polymer particles in gel form.