Chemische Werke Huls Aktiengesellschaft

Huls Aktiengesellschaft

Chemische Werke Huels Aktiengesellschaft

Rainer Feldmann

Roland Feinauer

Salih Mumcu

Heinz Scholten

Hans J Panoch

Klaus Burzin

Hans Jadamus

Gernot Horlbeck

Hans-Joachim Panoch

Karl-Heinz Hornung

Gunter Hess

Karl-Adolf Muller

Hanns-Jorg Bax

Siegfried Brandt

Hans-Jurgen Haage

Klaus Gorke

Klaus-Rudolf Meyer

Wolfgang Kriesten

Hans-Jurgen Smigerski

Hans Hinn

Karl Adolf Muller

Pulverulent polyamide coating compositions consisting of a mixture of similar polyamides having on the average at least nine aliphatically bound carbon atoms per carbonamide group and of different relative viscosity, the difference in relative viscosities amounting to at least 0.04 and at most 0.1 units. The mixtures are obtained by mixing powders prepared both by precipitation or by cold grinding or also by mixing the corresponding granulates which subsequently are then cold ground.

Pulverulent polyamide mixture coating composition wherein the polyamide

Coating powders for the melt film coating method, based on polyamides and adhesion improving additives. The polyamides are aliphatic homo- and/or copolyamides having at least six carbon atoms containing functional groups consisting of at least 80% of primary, secondary, or mixtures of primary and secondary amino groups. As the adhesion improving additive there is added from 0.1 to 10% by weight referred to the polyamides of an isophoronediisocyanate capped with lactams, an isophoronediisocyanate capped with acetonoxime or an isophoronediisocyanate capped with an oligomer of acetonoxime.

Coating powders based on polyamide and adhesion improving diisocyanate

Pulverulent polyamide coating compositions wherein the polyamide has as

Block copolyester amides having improved properties are applied as thermoplastic adhesives to textiles. Their melting points are between 80.degree. and 135.degree. C. and the block copolyester amides are prepared by polycondensing:

Application of block copolyester amides as thermoplastic adhesives for

Copolyamides based on dicarboxylic acids, diamines and omega amino carboxylic acids or lactams are used as thermoplastic adhesives to heat-seal especially siliconized textiles. The copolymers used consist of 20 to 80% by weight of one or more aliphatic omega amino carboxylic acids or lactams having 6 to 12 carbon atoms in the chain and 80 to 20% by weight of equimolar mixtures of one or more aliphatic dicarboxylic acids having 6 to 12 carbon atoms and aliphatic alpha-omega diamines and possibly cycloaliphatic diamines having 6 to 12 carbon atoms, at least 30% by weight of these diamines consisting of singly branched aliphatic diamines having 6 carbon atoms.

Heat sealing textiles with copolyamides

Powdered polyamide mixtures for use in the heat sealing of textiles by the powder point process. The polyamide homogeneous mixtures contain: (a) about 95 to 40% by weight of at least one copolyamide with a melting point of at least about 110.degree. to 140.degree. C. and having a proportion of a basic lauryllactam monomer component of at least 20% and at most 70% by weight; and (b) about 5 to 60% by weight of at least one copolyamide with a melting point between about 80.degree. to 110.degree. C. and having a proportion of a basic lauryllactam monomer component or lauryllactam and 11-aminoundecanoic acid copolymer of at least 25% and at most 70% by weight, where the percentages are based on the total weight of the copolyamide mixtures.

Powdered mixture of polyamides for heat sealing by the powder point

Copolyether ester amides having a melting point between about 85.degree. and 140.degree. C. from:

Copolyether ester amides useful as thermoplastic adhesives for heat

A textile hot-melt adhesive comprises a mixture of

Textile hot-melt adhesive

Hot-melt adhesives for articles which come into contact with organic fuels for internal engines comprising binary copolyamides having:

Hot-melt adhesive copolyamide having resistance to engine fuels

Copolyether ester amides having a melting point between about 85.degree. and 140.degree. C. are produced from:

Method of using copolyether ester amides as thermoplastic adhesives for

Polyamide powder coating compositions for the coating of metals at high temperatures are obtained by the precipitation method from polyamides having at least 10 aliphatically bound carbon atoms per carbonamide group, copolyamides having at least 70% of these polyamides and mixtures of homopolyamides and copolyamides having at least 70% of these polyamides. A. For the preparation of powder coating compositions useful in the fluidized bed coating method the polyamides with 10 or more carbon atoms and having a relative viscosity between 1.4 and 1.8 are added to at least twice the amount by weight of ethanol and while the mixture is being mechanically mixed in a closed vessel is converted into a solution at temperatures between 130.degree. and 150.degree. C. This solution is adjusted to a precipitation temperature of between 100.degree. and 125.degree. C. while avoiding the formation of local sub-cooling and is agitated under an inert gas atmosphere to suppress boiling. Without further heat supply, powders with a grain size distribution of at least 99.5% by weight between 40 and 250 microns are precipitated at a low angular speed of agitation. When the particle formation is terminated, the suspension formed is cooled to at least 70.degree. C. and following partial mechanical separation of the ethanol, first drying takes place at reduced pressure with wall temperatures at not more than 100.degree. C. with mild mechanical agitation and after the onset of friability the wall temperatures can be increased up to 150.degree. C. with stronger mechanical agitation. B. For the preparation of powder coating compositions useful in the electrostatic coating method the method of A is modified in the precipitation step by using a higher angular speed of agitation for the purpose of preparing a grain size distribution of 100% by weight smaller than 100 microns.

Method for polytropically precipitating polyamide powder coating

A process for preparing coating powders based on polylaurolactam for the vitrification coating process beginning with polylaurolactam granulates obtained by polymerizing laurolactam under internal pressure in the presence of 2 to 10% by wt. of water and 0.3 to 0.7% by wt. of phosphoric acid at temperatures between 265.degree. and 300.degree. C., in the absence of chain stabilizers, and which have a relative viscosity of between 1.50 and 1.80. After precooling to temperatures between -50.degree. and 0.degree. C., the granulates are ground and then graded. Extraction with methanol or ethanol is carried out prior to grinding or grading. Pigments are added to the monomerous laurolactam or to the polylaurolactam in the molten state prior to granulation. The powders are especially well suited to manufacture colored powders by the dry-blend process.

Method for producing polylaurolactam powder compositions for the coating

An aqueous polybutadiene dispersion is applied as the adhesive intermediary layer in the preparation of polyamide coatings on metal objects by a process of sintering the polyamide powders. The dispersion contains a liquid polybutadiene with a dynamic viscosity from about 70 to 30,000 millipascal seconds and with a configuration of 40 to 95% of cis-1,4-polybutadiene, 0 to 30% of trans-1,4-polybutadiene, 1 to 60% of 1,2-polybutadiene and, referred to the polybutadiene, 0.5 to 10% by weight of an emulsifier.

Polyamide coated base material having an intermediate layer of

Thermoplastic molding compositions having improved flexibility and cold impact strength, comprising a mixture of:

Thermoplastic molding compositions having improved _flexibility and cold

Method for preparing and using thermoplastic polyether ester amides with units of the starting components randomly distributed in the polymer chain. A mixture of:

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Rainer Feldmann