Abstract:
본 발명은 평균 직경이 0.1 내지 10㎛인 기공을 0.05 내지 0.4cc/g의 범위로 포함하는 폴리비닐 알콜 분말을 제공한다. 본 발명의 PVA 분말은 물에서의 용해도가 탁월하기 때문에, 이의 수용액을 공업적으로 쉽게 제조할 수 있다. 본 발명의 PVA 분말은 유기 휘발성 성분의 함량이 낮고 염기성 촉매로부터 유도된 카복실산 염 등과 같은 비휘발성 성분의 함량이 낮기 때문에, 공업적 취급성이 탁월하다.
Abstract:
본 발명은 약 10.0㎣ 이상의 경계 건조부피(Circumscribed dry volume)를 갖는 입자간 가교결합된 응집체를 포함하는 다공성의 흡수성 중합체 거대구조물(52)에 관한 것이다. 입자간 가교결합된 응집체는 실질적으로 수불용성인 흡수성 하이드로 겔-형성 중합체 물질의 다수의 전구체 입자; 및 전구체 입자의 중합체 물질과 반응하여 전구체 입자사이에 가교결합을 형성하는 입자간 가교결합제를 포함한다. 전구체 입자의 입상성질 때문에, 거대구조물(52)는 인접한 전구체 입자사이의 공극을 갖는다. 이 공극은 거대구조물이 액체 투과성이도록 상호연통 체널에 의해 상호연결되어 있다.
Abstract:
A polyHIPE-templated composition-of-matter afforded by interfacial polymerization, comprising a polymer of alternating residues of hydrophobic and hydrophihc monomers. The described composition-of-matter is characterized by an open-, quasi-closed- or a truly closed-cell microstructure, whereas the latter is capable of non-releasably or releasably encapsulating an organic or aqueous composition therein for extended periods of time, as well as various uses thereof.
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 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), wherein the composition (A) comprises at least one compound (af) comprising phosphorous and at least one functional group which is reactive towards isocyanates. 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 as well as in water tank or ice maker insulation systems.
Abstract:
Gegenstand der Erfindung ist eine asymmetrisch poröse Membran M aus mindestens zwei Amino NH-Gruppen pro Molekül aufweisendem thermoplastischen Siliconelastomer S1, das mittels Aldehyd vernetzt ist; zwei Verfahren zur Herstellung der mittels Aldehyd vernetzten asymmetrisch porösen Membran M, bei dem in einem ersten Schritt eine Lösung aus thermoplastischem Siliconelastomer S1, das mindestens zwei Amino NH-Gruppen pro Molekül aufweist, und Lösemittel L hergestellt wird, in einem zweiten Schritt die Lösung in eine Form gebracht wird, in einem dritten Schritt, die in Form gebrachte Lösung mit einem Fällmedium F in Kontakt gebracht wird, wobei sich eine Membran ausbildet, in einem vierten Schritt Lösemittel L und Fällmedium F aus der Membran entfernt werden und in einem fünften Schritt die Membran einer Vernetzung unterworfen wird, wobei die kovalent vernetzte Membran M entsteht, wobei beim ersten Verfahren im ersten Schritt und beim zweiten Verfahren im fünften Schritt ein Aldehyd enthaltendes Aldehydreagenz AR zugesetzt wird; sowie die Verwendung der Membran M für die Trennung von Stoffgemischen.
Abstract:
Porous organic polymeric films having multiple discrete cavities can be prepared using an water-in-oil emulsion that includes a cavity stabilizing hydrocolloid on the inner walls of the multiple discrete cavities. The multiple discrete cavities can also include organic catalytic materials for various catalytic reactions, markers materials for security applications, or the multiple discrete cavities can be used to increase opacity, hydrophobicity, or other desirable properties compared to nonporous organic polymeric films composed of the composition and dry thickness.
Abstract:
A process for producing a nanoporous amino resin foams, comprising the steps of a) providing an aqueous micellar emulsion template, comprising a block copolymers based on ethylene oxide and propylene oxide, b) by adding an organic micelle expander, c)combining the expanded micelle from step b) with an amino resin, d) adding an curing catalyst, e) optionally adding an organosilane and/or an organoamine, f) optionally adding polyvinylformamide, g) curing the amino resin above 50°C to obtain a gel, h) optionally replacing water and micelle emulsion template by a solvent with a boiling point at atmospheric pressure below 100°C, and i)drying the gel at ambient temperature and atmospheric pressure.