Abstract:
A method for making an article comprises the following steps: providing a polyamide substrate; contacting a selected surface region of the polyamide substrate with a swelling agent having a high solubility limit for the polyamide substrate, whereby a surface part of the polyamide substrate is swollen and a part underneath the surface is non-swollen; contacting the swollen polyamide substrate with a coagulating agent having a low solubility limit for the polyamide and being miscible with the swelling agent, whereby the swollen part of the polyamide substrate is first precipitated and then crystallized back onto the non-swollen part. With the method, an article having a structured hydrophilic or superhydrophilic polyamide surface is obtained.
Abstract:
The invention relates to the use of polymers containing an alpha olefin, a vinylester and an ester of an alpha , beta unsaturated carboxylic acid polymerised in the polymer, as additives for fuel oils and lubricants and, in particular, as a cold flow improver in fuel oils. The invention also relates to fuel oils and lubricants added to said polymers, in addition to additive packets containing said type of copolymers.
Abstract:
The invention relates to fluoranthene derivatives of general formula (I), wherein R , R , R and a are defined according to the description, with the proviso that at least one of the radicals R or R is not hydrogen. The invention also relates to a method for the production of said derivatives and to the use of fluoranthene derivatives as an emitter molecule in organic light-emitting diodes (OLEDs), a light-emitting layer containing the inventive fluoranthene derivatives as an emitter molecules, an OLED containing the inventive light-emitting layer and also to devices containing the inventive OLED.
Abstract:
A method for making an article comprising the steps of i) providing a polymer substrate of an amorphous, non-crystallizable polymer; ii) contacting a selected surface region of the polymer substrate with a swelling agent, the swelling agent having a high solubility limit for the polymer substrate, whereby a surface part of the polymer substrate is swollen and a part underneath the surface of the polymer substrate is non-swollen; iii) contacting the polymer substrate of step (ii), wherein a part of the surface of the polymer substrate is swollen, with a coagulating agent, the coagulating agent a low solubility limit for the polymer and being miscible with the swelling agent, whereby the swollen part of the polymer is precipitated back onto the non-swollen part of the polymer substrate, whereby an article having a structured surface is obtained; an article prepared by the method mentioned before and the use of the article in indoor applications selected from furniture, household appliances, computer peripherals, clothing apparel, filters and membranes and outdoor applications selected from cooling equipment, drainage pipes and technical textiles.
Abstract:
The invention relates to a curable composition comprising the following components: (A) at least one isocyanate, (B) at least one binder, and (C) at least one polyhedral oligomeric silsesquioxane, with the number of cages z per molecule being 2 or 3 and the number of tin atoms per molecule being at least one. Furthermore, the invention refers to a kit of parts comprising as components A), B), and C); to the use of the polyhedral oligomeric silsesquioxanes in coatings, lacquers, paintings, films and polymer compositions; to coatings obtainable by curing of these compositions; and to the use of polyhedral oligomeric silsesquioxanes containing at least one metal atom, in particular polyhedral oligomeric stannasilsesquioxane to increase the scratch resistance of coatings.
Abstract:
The invention relates to a method of preparing a composition comprising (a) reacting a binder component (B) comprising at least one alkoxysilane (B2), and a polymer dispersion (PD), thus obtaining a prepolymer and subsequently (b) mixing or hydrolyzing and polycondensing said prepolymer in the presence of water and at least one antimicrobial agent (Z) comprising at least one antimicrobial active (Z1) and optionally a particulate carrier substance (Z2), wherein the at least one antimicrobial agent (Z) is unreactive during step (b).
Abstract:
The present invention concerns a method of making a porous material comprising the following steps in the order a-b-c-d: (a) reacting at least one organosilane (A) with water in the presence of a solvent (C) to form a polymeric material, (b) subjecting said polymeric material to a first heat treatment, (c) bringing said polymeric material into contact with at least one dehydroxylation agent (D), (d) subjecting said polymeric material to electromagnetic radiation and/or to a further heat treatment. The present invention furthermore concerns the porous material obtainable by the inventive method, semiconductor devices and electronic components comprising said porous material, and the use of said material for electrical insulation and in microelectronic devices, membranes, displays and sensors.
Abstract:
The invention relates to composite materials, comprising (A) natural fibres, (B) at least one thermoplastic polymer, (C) at least one statistical copolymer with a molecular weight M n up to a maximum of 20,000 g/mol, obtained by copolymerisation of (a) ethylene, (b) at least one reactive comonomer, selected from (b1) ethylenically-unsaturated C 3 - C 10 monocarboxylic acids, (b2) ethylenically-unsaturated C 4 -C 10 dicarboxylic acids or the anhydrides thereof, (b3) epoxy esters of ethylenically-unsaturated C 3 -C 10 monocarboxylic acids, (b4) comonomers of general formula (I) in which the variables are as defined below: R 1 = H, straight- and branched-chain C 1 -C 10 alkyl, R 2 = H, straight- and branched-chain C 1 -C 10 alkyl, R 3 independently = H, straight- and branched-chain C 1 -C 10 alkyl and C 3 -C 12 cycloalkyl, wherein two R 3 groups can be connected together to form a 3- to 10-membered ring, X = O, S or N-R 4 , R 4 = straight- or branched-chain C 1 -C 10 alkyl, A 1 = a divalent group from C 1 -C 10 alkylene, C 4 -C 10 cycyloalkylene and phenylene and (c) optionally at least one further comonomer.