Abstract: The present invention refers to a process for preparing cross-linked polyolefins, comprising the steps of adding a diazido compound of the formula (I) N?N?N—X—R—X—N?N=N wherein R represents an aryl, alkyl or aralkyl group having 3 to 20 carbon atoms and X stands for —CO—, —O—CO—SO2-, —PO2-, —PO3—, or -Si (?O)—, and a peroxide compound of the general formula (II) R1-X1-OO—X2—R2 wherein R1 and R2 are the same or different and represent hydrogen, an aryl, alkyl or aralkyl group having 3 to 20 carbon atoms and optionally comprising further peroxide groups, wherein one of R1 and R2 can form a ring, and X1 and X2 are the same or different and stand for a direct bond, —CO2— or —CO— to a polyolefin in powder or pellet form; mixing the product to obtain a mixture; extruding the mixture in an extruder at a temperature above the decomposition temperature of the diazido compound of formula (I) and of the peroxide compound of formula (II).

Abstract: Rolled metal substrate of aluminium, aluminium alloys or steel with a layer of an organic based and preferably clear and glossy lacquer/varnish. The lacquer/varnish or gel-coat comprises controlled amounts of inorganic polymer particles mainly with a size mainly in the range 1-100 nm, the particles being able to form a three-dimensional network that is independent of the organic network of the lacquer or with bondings to this network. The polymer particles are typically a reaction product obtained by hydrolysis and condensation reactions of monomer compounds chosen among the following groups: i) M(OR)n, or ii) R′-M(OR)n, where M is a metal ion, and R is an organic group chosen among alkyl, alkenyl, aryl or combination of such groups with from 1 to 8 carbon atoms, R′═R or R—X, where X is an organic group like e.g. amine, carboxyl or isocyanate, and n is an integer between 1 and 6.

Abstract: Organic based and preferably clear and glossy lacquer/varnish or an organically based gel-coat with the ability to form coatings with high wear resistance, as well as method for manufacturing same, said lacquer/varnish or gel-coat comprises a controlled amount of inorganic polymer particles mainly with a size of 1-100 nm, the particles being able to form a three-dimensional network that is independent of the organic network of the lacquer or which may have bondings to this network. The polymer particles are typically a reaction product obtained by hydrolysis and condensation reactions of monomer compounds chosen among the following groups: i) M(OR)n, or ii) R′-M(OR)n, where M is a metal ion, and R is an organic group chosen among alkyl, alkenyl, aryl or combinations of such groups with from 1 to 8 carbon atoms, R′═R or R—X, where X is an organic group like e.g. amine, carboxyl or isocyanate, and n is an integer between 1 and 6.

Abstract: The present invention relates to contrast agents comprising gas-containing or gas-generating polymer microparticles and/or microballoons, in which the polymer is a biodegradable polymer containing units of formula -?--(O).sub.m --CO--O--C(R.sup.1 R.sup.2)--O--CO--(O).sub.n --!- . R.sup.1 and R.sup.2 each represent hydrogen or a carbon-attached monovalent organic group, or together form a carbon-attached divalent organic group, and m and n are each independently zero or one. The contrast agents may be used in diagnostic applications such as ultrasound and MR imaging.

Abstract: Contrast agents comprising gas-containing or gas-generating polymer microparticles and/or microballoons, in which the polymer is a biodegradable polymer containing units of formula--(O).sub.m --CO--O--C(R.sup.1 R.sup.2)--O--CO--(O).sub.n --(wherein R.sup.1 and R.sup.2 each represent hydrogen or a carbon-attached monovalent organic group or together form a carbon-attached divalent organic group, and m and n are each independently zero or one) may be used in diagnostic applications such as ultrasound and MR imaging.

Abstract: Contrast agents comprising gas-containing or gas-generating polymer microparticles and/or microballoons, in which the polymer is a biodegradable polymer containing units of formula--(O).sub.m --CO--O--C(R.sup.1 R.sup.2)--O--CO--(O).sub.n --(wherein R.sup.1 and R.sup.2 each represent hydrogen or a carbon-attached monovalent organic group or together form a carbon-attached divalent organic group, and m and n are each independently zero or one) may be used in diagnostic applications such as ultrasound and MR imaging.

Abstract: The invention relates to non-crosslinked non-polypeptide polymers containing biodegradable lipophilic side chains incorporating methylene diester units of the formula --[--CO--O--C(R.sup.1 R.sup.2)--O--CO--]--, where R.sup.1 and R.sup.2 each represents a hydrogen atom or a carbon-attached monovalent organic group or R.sup.1 and R.sup.2 together form a carbon-attached divalent organic group. The lipophilic moieties are biodegradatively cleavable to yield a water-soluble polymer.

Abstract: Method for production of a thermostable crosslinked halogen-containing polymer. Expoxygroups are added by way of a monomer as for example glycidylmethacrylate. The crosslinking of the polymer is carried out through an organic silane which can be hydrolyzed. By this method the crosslinking can be separated from the processing of the polymer as it is catalyzed by moisture after the processing is carried out. The crosslinking reaction is carried out very fast. Good thermostability is gained even if the halogen-containing monomer is vinylchloride.