Generation of cyclic siloxanes in silicone compositions containing quartz flour as a filer is reduced by incorporating a basic substance into the composition prior to adding filler.

Generation of cyclic siloxanes in silicone compositions containing quartz flour as a filer is reduced by incorporating a basic substance into the composition prior to adding filler.

The present application relates to a polypropylene (PP) composition comprising a) 50.0 to 95.0 wt.-%, based on the total weight of the polypropylene (PP) composition, of a polypropylene (PP) homopolymer being polymerized in the presence of a single-site catalyst and b) 5.0 to 50.0 wt.-%, based on the total weight of the polypropylene (PP) composition, of a mineral filler, to an article comprising the polypropylene (PP) composition as well as the use of the polypropylene (PP) composition for improving the thermo-mechanical properties.

A polymer composition that comprises an olefinic polymer, a flame retardant that includes a halogen-free mineral filler, and a compatibilizing agent is provided. The halogen-free mineral filler constitutes from about 20 wt. % to about 80 wt. % of the composition. The composition may exhibit a degree of water uptake of about 5 wt. % or less after being immersed in water for seven days at a temperature of 23 C.

The present invention relates to a polymer alloy comprising a sulphur-containing aromatic polymer and at least one fluoroelastomer, which has improved dispersibility and improved mechanical properties. The invention also relates to a process for the preparation of said polymer alloy and to an article comprising the same.

The invention relates to an article having a single- or multi-layered main body having elastic properties, in particular an air spring bellows, a metal-rubber element or a vibration damper.

In order to improve its flame retardant properties, the main body of the article consists of or contains at least one layer D constructed from a rubber mixture which is free from halogen-containing flame retardants and contains at least one carbon black having a BET surface area according to DIN-ISO 9277 between 35 and 140 m.sup.2/g and an oil absorption number (OAN) according to ISO 4656 between 70 and 140 ml/100g and a first aluminum trihydrate (ATH_1) and at least a further aluminum trihydrate (ATH_2), wherein the first aluminum trihydrate (ATH_1) and the further aluminum trihydrate (ATH_2) each have a different particle size.

A fire-resistant resin composition comprises an endothermic agent having a thermal decomposition onset temperature of 800 C. or lower and an amount of heat absorbed of 300 J/g or larger, and a resin, a content of the endothermic agent per 100 parts by mass of the resin being 10 to 10000 parts by mass.

A fire resistant cable comprising: a conducting element (2; 21); a layer, surrounding the conducting element, made of a ceramifiable composition comprising: a thermoplastic polymer mixture comprising: (a) a copolymer of ethylene with a C.sub.4-C.sub.12 alpha-olefin, having a density of from 0.860 to 0.910 g/cm.sup.3, a melt flow index not higher than 3 g/10 min and a melting point of 105 C. at most; (b) an ethylene homopolymer or copolymer of ethylene with a C.sub.4-C.sub.12 alpha-olefin, having a density of from 0.900 to 0.985 g/cm.sup.3, a melt flow index not higher than 5 g/10 min and a melting point of at least 110 C.; and (c) a polyethylene grafted with an ethylenically unsaturated monomer; at least 25 wt % of silica; a fluxing agent selected from alkaline metal oxides or precursors thereof; an inorganic hydroxide compound selected from magnesium hydroxide, aluminium hydroxide and mixtures thereof; a stabilizing agent comprising a hydrated magnesium silicate in an amount of at least 5 wt %; weight percentages being based on the total weight of the ceramifiable composition. Upon exposure to elevated temperatures such as those encountered in case of fire, the ceramifiable composition is transformed into a ceramic material capable of protecting the conducting element from fire and mechanical stresses. The fire resistant cable of the present invention can continue operating under fire conditions for a certain period of time.

A flame-retardant thermoplastic resin composition comprising about 20% to about 30% polypropylene; about 50% to about 65% Magnesium Hydroxide; and about 3% to about 8% polybutene. Articles of manufacture made by this composition and methods making these articles of manufacture.

A flame-retardant thermoplastic resin composition comprising about 20% to about 30% polypropylene; about 50% to about 65% Magnesium Hydroxide; and about 3% to about 8% polybutene. Articles of manufacture made by this composition and methods making these articles of manufacture.