摘要:
The present invention relates to a polymer foam, said polymer foam comprising pores forming an open-cell polymer foam, said polymer foam comprising a supramolecular gel inside pores, and said polymer foam comprising at least one enzyme. The present invention relates to a supramolecular gel; its preparation and its applications, notably in chemical synthesis and kinetic resolution, in particular of organic compounds. The present invention also relates to flow chemistry.
摘要:
A fireproof material incorporating aerogel with an organic foam material and a method for making the same are provided. The method is carried out as follows: A. a mixed solution of a precursor and an organic solvent is added with an acid catalyst and becomes an anhydrous aerogel solution through hydrolysis; B. the anhydrous aerogel solution is added with an aqueous alkali catalyst solution and forms an aerogel solution through condensation; C. an organic foam material is impregnated with the aerogel solution such that aerogel is generated by gelation and is incorporated with the organic foam material, forming a three-dimensional reticular structure; and D. the organic foam material incorporated with the aerogel is dried and then shaped to produce a fireproof material. The fireproof material is highly proof against fire and can pass the limiting oxygen index test.
摘要:
Combinations of gelatinous elastomer and polyurethane foam may be made by introducing a plasticized A-B-A triblock copolymer resin and/or an A-B diblock copolymer resin into a mixture of polyurethane foam forming components including a polyol and an isocyanate. The plasticized copolymer resin is polymerized to form the gelatinous elastomer in-situ while simultaneously polymerizing the polyol and the isocyanate to form polyurethane foam. The polyurethane reaction is exothermmic and can generate sufficient temperature to melt the styrene-portion of the A-B-A triblock copolymer resin thereby extending the crosslinking and in some cases integrating the A-B-A triblock copolymer within the polyurethane polymer matrix. The combination has a marbled appearance. The gel component has higher heat capacity than polyurethane foam and thus has good thermal conductivity and acts as a heat sink. Another advantage of in situ gel-foam is that the gel component provides higher support factors compared to the base foam alone.
摘要:
Combinations of gelatinous elastomer and polyurethane foam may be made by introducing a plasticized triblock copolymer resin and/or a diblock copolymer resin at least partially cured into gel particles into a mixture of polyurethane foam forming components including a polyol and an isocyanate. The plasticized copolymer resin is polymerized to form a cured gelatinous elastomer or gel, which is then reduced in size, for instance to give an average particle size of 10 millimeters or less. Polymerizing the polyol and the isocyanate forms polyurethane foam. The polyurethane reaction is exothermic and can generate sufficient temperature to at least partially melt the styrene-portion of the triblock copolymer resin thereby extending the crosslinking and in some cases integrating the triblock copolymer within the polyurethane polymer matrix. The gel component has higher heat capacity than polyurethane foam and thus has good thermal conductivity and acts as a heat sink.
摘要:
A resilient structure comprising a carrier layer of open-cell, resilient urethane foam material. The foam material is substantially completely and uniformly impregnated with an impregnant comprising silicone. The impregnant is cured after said impregnation to produce a foamed, open cell, resilient structure wherein the open cells thereof partially comprise the carrier layer of urethane foam material and the silicone includes a filler. A method for producing a resilient structure comprising applying silicone onto a carrier layer of open-cell, resilient urethane foam material, substantially completely and uniformly impregnating the carrier layer with the silicone, and curing the silicone to produce a foamed open-cell, resilient structure wherein the open cells thereof partially comprise the foam material, wherein the structure exhibits properties of the silicone, and wherein the silicone includes a filler.
摘要:
The invention relates to a process for producing xerogel composites, which comprises: (a) provision of a composition comprising an organic gel precursor (A) comprising a monomer component (A1) composed of at least one polyfunctional isocyanate and a monomer component (A2) composed of at least one compound selected from among polyfunctional amines and polyfunctional hydroxy compounds; (b) reaction of the gel precursor (A) in the presence of an open-celled macroporous foam (B) and a solvent (C) to form a xerogel composite; (c) drying of the xerogel composite by conversion of the solvent (C) into the gaseous state at a temperature and a pressure below the critical temperature and the critical pressure of the solvent (C). The invention further relates to the xerogel composites which can be obtained in this way and their use as insulating material, for thermal insulation, vacuum insulation panels, in refrigeration units or in buildings.
摘要:
A functional TFE copolymer fine powder is described, wherein the TFE copolymer is a polymer of TFE and at least one functional comonomer, and wherein the TFE copolymer has functional groups that are pendant to the polymer chain. The functional TFE copolymer fine powder resin is paste extrudable and expandable. Methods for making the functional TFE copolymer are also described. The expanded functional TFE copolymer material may be post-reacted after expansion.
摘要:
The instant invention relates to a method for changing characteristics of a plastic component, wherein a medium is introduced into the plastic component, which encompasses a porosity and wherein the medium forms a homogenous compound with the plastic component by at least partially dissolving the plastic component.
摘要:
The invention relates to a porous material comprising a substrate based on at least one organic polymer A and a coating, where vii) the uncoated substrate based on the organic polymer A is macroporous, viii) the surface of the macroporous substrate is coated with a polymer B based on reactive resins, and ix) this coating with a polymer B is nanoporous and the mean diameter of the nanopores is not more than 1000 nm, and recording materials being excepted. The invention also relates to a process for producing the porous material and to the use of the porous material as a filter for gases or liquids.Finally, the invention relates to filters comprising the porous material, and to a process for filtering gases or liquids.