Modifizierte Aminoharzvorkondensate, ihre Herstellung und ihre Verwendung

DE 19814880 A UPAB: 19991122 NOVELTY - A modified amino-resin pre-condensates is obtainable from an amino-resin precondensate and a fatty acid amine (I), optionally as an addition product and/or condensate with an aldehyde (II). DETAILED DESCRIPTION - A modified amino-resin pre-condensates (MAV) is obtainable by reacting an amino-resin precondensate (AV) with at least one amine (I) and/or addition product and/or condensate of N(R1)(R2)(R3) (I) with a 1-12 C aldehyde (II) and one or more CHO groups: R1 = fatty acid group; R2 = H; fatty acid group; (CH2CH2O)xH; optionally substituted benzyl; or CH2CH2NR4R5; R3 = H or (CH2CH2O)yH; R4 = H or (CH2CH2O)zH; R5 = fatty acid group; x, y and z = 1-50. An INDEPENDENT CLAIM is also included for the preparation of the modified condensates (MAV). USE - The MAV are useful as dispersants. They can also be used for the manufacture of micro particles and microcapsules. ADVANTAGE - The MAV have improved interface activity and dispersion behavior than prior art polymer pre-condensates. E.g. they lower the surface tension of water to 0.8-3 mN/m (measured in a xylene/water interface system). Also, as they contain a large number of functional groups, they can be covalently bonded in a polymer composite by co-condensation or condensation with polymers or other prepolymers

Verfahren zur Herstellung von metallisierten Polymerpartikeln und nach dem Verfahren hergestelltes Polymermaterial

Prodn. of polymeric particles provided with a metallic coating comprises: (a) activating the surfaces of amino resin polymeric particles, which are in the form of microcapsules, microspheres, hollow spheres, compact or porous powder; and (b) depositing a metallic coating on the activated particles by chemical metallisation. Also claimed are: (1) a process for producing polymeric particles with a metallic coating, and (2) metal-coated polymeric particles produced by the above process. Step (a) comprises treatment with a soln. contg. ions of Pd, Au or Ag ions, pref. comprising PdCl2, H2PdCl4 or a tetrachloropalladate salt and sulphuric acid. The process may further comprise, before step (b) and before, after or during step (a), sensitising the polymer particles, pref. with a soln. comprising tin ions, pref. using SnCl2. The particles may be exposed to a reducing agent between steps (a) and (b) and the process may further comprise, after step (b), applying a further metallic coating by an electrolytic technique. The metallic coating is deposited in colloidal form or as an enclosed metal layer on the surfaces of the polymer particles and may comprise a magnetically active metal, e.g. Co, Ni, a phosphorus alloy of Co or Ni or Cu. The particles are prepd. by subjecting amino resin prepolymers to acid-catalysed polycondensation and converting the resulting crosslinked amino resin polymeric material into the above physical form. USE - The particles are used in catalytic processes, as lightweight, finely particulate anode materials or as magnetic particles in industrial or medical applications (all claimed), e.g. in the mfr. of printed circuit boards, as immune diagnostic agents and in the mfr. of conductive membranes. ADVANTAGE - Aminoplast particles can be provided with a stable, homogeneous or even colloidal metallic coating. The internal and external structure of the particles has no effect on the type or function of the applied metallic layer, allowing it to be tailored to a partic. application

Mikropartikel, enthaltend einen Wirkstoff und ein polymeres Kapselwandmaterial, ein Verfahren zu deren Herstellung und deren Verwendung

Microparticles comprise a core of a hydrophobic material, which is waxy at room temperature, containing an active agent as capsule contents. The core is (partly) covered by a polymeric capsule wall material. Also claimed is a method of making the microparticles, by (a) preparing an aqueous solution containing a prepolymer for the wall material, preferably in a concentration of 3-50 g/100 g water; (b) melting and homogenising the agent and wax; and (c) adding the melt from (b) to the solution from (a) at 20-95 deg. C, with the solution above the temperature of the melt; and mixing with shear. USE - The microparticles are used for combating plant, food and hygiene pests, animal parasites and weeds, and are applied as an aqueous suspension, or are used to prepared attractants; and for releasing fragrances and ethereal oils, when applied in aqueous solution, suspensions or dispersion, or in lacquer or paint (all claimed). The microparticles are useful for preparing plant protective agents for agriculture and forestry, hygiene products and products for the food, packaging, building and cosmetics industries. ADVANTAGE - The microparticles allow controlled release of the agent, especially for long-term application. The wax matrix controls diffusion at temperatures below its melting range, which can be varied to suit the application. With a wax that sets at temperatures of cool nights and mornings, no agent is released when pest activity is very low

Preparation of starch carbamates in homogeneous phase using different mixing conditions

The preparation of starch carbamates of wrinkled pea starch in homogeneous phase catalysed by dibutyltin dilaurate in DMSO as solvent is described. The empfloyed isocyanates have linear alkyl chains with 7, 9, 11, 15 or 18 carbon atoms. Starch carbamates with equal degrees of substitution and different alkyl chains lengths were synthesised in a reaction flask. The preparation of carbamates with equal alkyl chain length and different degrees of substitution was also possible. The structures of the polymers were characterised by elemental analysis, IR- and H-1-NMR-spectroscopy. The behaviour of the prepared starch carbamates under thermal loading was investigated by using Differential Scanning Calorimetry (DSC) and a hot press. In addition, for 1-undecyl isocyanate the starch carbamate was prepared both in a kneader and an extruder. The differences in reaction conditions and the results were discussed

Sulfonierte Polyaryletherketone

Prepn. of sulphonated polyaryl ether ketones (I) comprises sulphonated aromatic polyether ketones (II) in a mixt. of conc. H2SO4 and oleum with a total SO3 content of not less than 82 wt.%. Also claimed are certain (I), esp. in the form of cation exchange membranes. USE - The process is used for producing (I) in the form of cation exchange membranes (claimed). ADVANTAGE - Even (II) with almost no O-Ph-O gps. can be sulphonated under these conditions. The prods. have a deg. of sulphonation comparable with that of commercially available polyether ketones and better, i.e. lower, swelling ratio. Cation exchange membranes with keto/ether gp. ratio > 1:1 have a higher concn. of functional gps., higher cation exchange capacity, lower electrical capacity and lower swelling ratio than usual

Verfahren zur Herstellung von Polyester unter Verwendung von Metallkomplexen

DE 10337522 A UPAB: 20040421 NOVELTY - Method for preparing polyester (A) using at least one metal complex (I) as catalyst. DETAILED DESCRIPTION - Method for preparing polyester (A) using at least one metal complex of formula (I) as catalyst. (R1O)(R2O)(R3O)(R4O)M (I) M = titanium, zirconium or hafnium; R1-R4 = hydrogen, -PO(OR'1)(OR'2), -PO(R5)(OR'3), SO2R'4, CR6=X, CR7=CR8-CR9=X, P(X)(OR11)(OR10), P(X)=CR12R13, P(O)(OH)-O- P(X)(OR'5)(OR'6), P(O)(OR'7)-O-P(X)O, -CR14R'8-C(X)-O- A+, or optionally substituted aryl, alkyl, alkenyl, aminoalkyl or (N-alkylenediamino)alkyl, or R1 with R2, R3 or R4, or R2 with R3 or R4, or R3 with R4 form at least one bridging ligand -P(O)(OR15-O-P(O)(OR16)-; A = alkali metal or ammonium; R5-R16 = hydrogen, P(O)(OR'9)(OR'10), (H)P(O)OR'11, SO2R'12, or optionally substituted alkyl or aryl; R'1-R'12 = optionally substituted alkyl or aryl; and X = oxygen or sulfur; with the proviso that at least one of R1-R4 is other than hydrogen, alkyl or aryl. USE - Preparing polyesters for use as packaging or constructional materials or fibers. ADVANTAGE - (I) provides an economically efficient method for preparing polyesters of number-average molecular weight over 22 kD, without requiring a solid-phase secondary polycondensation stage. (I) are co-ordinatively saturated, so have excellent hydrolytic and thermal stability (contrast alkoxy-titanates or -zirconates) and are not inactivated under polymerization conditions. They produce polyesters with a low metal content (typically 2.5-25 ppm Ti, i.e. significantly lower catalyst consumption than known antimony catalysts), and the production rate and molecular weight of the product can be controlled. Phosphorus-containing (I) provide both catalytic and stabilizing effects in a single compound. (I) that contain nitrogen can scavenge aldehydes formed by thermal decomposition of the polyester