Basf Se Corporation

Polymers Crc Limited

Basf Se Ludwigshafen

Rainer Xalter

Thomas Weiss

Hans-Werner Schmidt

Michael Roth

Heinz Herbst

Matthias Maase

Florian Richter

Hye Jin Park

Thomas Weiβ

Claus Gabriel

Simon Kniesel

Sabine Fuchs

Hartmut Denecke

Norbert Gutfrucht

Alexander Tishkov

Raphaël Dabbous

The invention relates to the use of thermoplastic molding compositions comprising

Polyamides with improved optical properties

Disclosed is a method of reducing a haze value in molding compositions including use of colorants selected from anthraquinone colorants, benzimidazolone colorants and perinone colorants. The molding compositions include at least one polyamide and at least one compound of the general formula (I) where x is 1, 2 or 3; R1 and R2 are mutually independently selected from hydrogen, linear C1-C7-alkyl, branched C3-C10-alkyl, unsubstituted or substituted C3-C12-cycloalkyl, unsubstituted or substituted C3-C12-cycloalkyl-C1-C4-alkyl, unsubstituted or substituted aryl and unsubstituted or substituted aryl-C1-C4-alkyl; and Z is selected from C3-C10-alkanediyl, unsubstituted or substituted arylene, unsubstituted or substituted arylene-C1-C4-alkylene-arylene, unsubstituted or substituted heteroarylene, unsubstituted or substituted heteroarylene-C1-C4-alkylene-heteroarylene, unsubstituted or substituted C5-C8-cyclo-alkylene, unsubstituted or substituted C5-C8-cycloalkylene-C1-C4-alkylene-C5-C8-cycloalkylene, unsubstituted or substituted heterocycloalkylene and unsubstituted or substituted heterocycloalkylene-C1-C4-alkylene-heterocycloalkylene.

Polyamide molding compositions with improved optical properties and use of colorants therein

The invention relates to the use of thermoplastic molding compositions comprising A) 30 to 99.99 wt % of a thermoplastic polyamide, B) 0.01 to 10 wt % of a compound of formula I  or &#x2014;O&#x2014;Rradical or  or &#x2014;O&#x2014;Rradical or 

Polyamide compositions having improved optical properties

The present invention relates to a polymer composition comprising at least one polyamide and at least one urea compound of the formula I where x is 1, 2 or 3; Rand Rare selected from hydrogen, linear C-C-alkyl, branched C-C-alkyl, unsubstituted or substituted C-C-cycloalkyl, unsubstituted or substituted C-C-cycloalkyl-C-C-alkyl, unsubstituted or substituted aryl and unsubstituted or substituted aryl-C-C-alkyl; and Z is selected from C-C-alkanediyl, unsubstituted or substituted arylene, unsubstituted or substituted aryl unsubstituted or substituted ene-C-C-alkylene-arylene, unsubstituted or substituted heteroarylene, unsubstituted or substituted heteroarylene-C-C-alkylene-heteroarylene, unsubstituted or substituted C-C-cycloalkylene, C-C-cycloalkylene-C-C-alkylene-C-C-cycloalkylene, unsubstituted or substituted heterocycloalkylene and heterocycloalkylene-C-C-alkylene-heterocycloalkylene. This urea compound is used for improving the optical properties of the polyamide polymer composition. The present invention also relates to shaped articles obtained from said composition and to novel urea compounds.

Polyamide compositions with improved optical properties

A new composite comprises (a) 10.1-99.9% by weight of elemental Ag and (b) 0.1-89.9% by weight of ZnO, wherein the sum of (a) and (b) makes 90% or more by weight of the composite and wherein the elemental Ag has a primary particle size of 10-200 nm and/or the ZnO has a primary particle size of 0.1 to below 50 &#x3bc;m and/or the composite has a particle size distribution of 0.1-50 &#x3bc;m and/or a BET surface area of 10-100 m/g. The novel composite may be obtained by the steps (i) mixing a first mixture of at least one Ag-salt with a second mixture of at least one Zn-salt thereby forming a third mixture of Ag- and Zn-salts, (ii) adding the third mixture to a mixture of a carbonate source, (iii) co-precipitating of the Ag- and Zn-carbonates formed in step (ii), (iv) washing of the Ag- and Zn-carbonates and (v) thermal decompositing of the Ag- and Zn-carbonates. The novel composites are useful to impart antimicrobial properties to surfaces, articles or bulk compositions, especially to membrane systems for gas- or water separation.

Nano silver&#x2014;zinc oxide composition

The present invention relates to flame retardant polymer compositions which comprise aminoguanidine phenylphosphinates and mixtures with additional flame retardants. The compositions are especially useful for the manufacture of flame retardant compounds based on polyfunctional epoxides or polycondensates like polyesters, polyamides and polycarbonates.

Aminoguanidinephenylphosphinate flame retardant compositions

The invention relates to flame retardant compositions, wherein a phosphinic acid hydrazide is present in a polymer substrate. The combination with &#x3e;NOR-compounds improves the flame retardant properties.

Phosphinic acid hydrazide flame retardant compositions

A new composite comprises (a) 10.1-99.9% by weight of elemental Ag and (b) 0.1-89.9% by weight of ZnO, wherein the sum of (a) and (b) makes 90% or more by weight of the composite and wherein the elemental Ag has a primary particle size of 10-200 nm and/or the ZnO has a primary particle size of 0.1 to below 50 &#x3bc;m and/or the composite has a particle size distribution of 0.1-50 &#x3bc;m and/or a BET surface area of 10-100 m2/g. The novel composite may be obtained by the steps (i) mixing a first mixture of at least one Ag-salt with a second mixture of at least one Zn-salt thereby forming a third mixture of Ag- and Zn-salts, (ii) adding the third mixture to a mixture of a carbonate source, (iii) co-precipitating of the Ag- and Zn-carbonates formed in step (ii), (iv) washing of the Ag- and Zn-carbonates and (v) thermal decompositing of the Ag- and Zn-carbonates. The novel composites are useful to impart antimicrobial properties to surfaces, articles or bulk compositions, especially to membrane systems for gas- or water separation.

Nano silver-zinc oxide composition

The present invention relates to flame retardant polymer compositions which comprise melamine phenylphosphonates and mixtures with dihydro-oxa-phosphaphenanthrene derivatives. The compositions are especially useful for the manufacture of flame retardant compounds based on polyfunctional epoxides or polycondensates like polyesters, polyamides and polycarbonates.

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Basel, Switzerland

Rainer Xalter