Ciba-geigy Corporation

Ciba-geigy Ag

Alkor Gmbh

Franz Breitenfellner

Lothar Buxbaum

Thomas Kainmuller

Roland Fink

Karl Leidig

Holger Andreas

Josef Hrach

Thomas Kainmulle

Flame-resistant polyester moulding compounds comprising

Flame-resistant polyester moulding compound

A process for producing light-reflecting bodies is described. The wall of the light-reflecting body consists of a polyalkylene terephthalate and/or a copolyester thereof, containing in each case 10-40% by weight of a finely-divided filler, a light-reflecting metal layer being applied directly to at least one surface of the wall. According to the novel process, a polyester moulding compound containing:

Process for producing light-reflecting bodies

When exposed to an open flame, the resultant polymer melt of a reinforced, flame-proofed thermoplastic polyester can be effectively prevented from dripping by the addition of xonotlite.

Flame-proofed, reinforced thermoplastic polyester moulding composition

The tendency to drip of the melt formed from reinforced moulding materials based on thermoplastic polyesters, provided with a flame-retarding finish, when the latter are subjected to an open flame can be prevented by adding phyllosilicates, and the reduction in the toughness properties thereby caused can be prevented by adding alkali metal salts of aliphatic C.sub.6-22 monocarboxylic acids.

Flame-retarding, reinforced moulding material based on thermoplastic

The invention relates to moulding compositions based on thermoplastic polyesters and containing finely particulate calcined magnesium sulfate. The moulded articles obtained with these compositions have increased stiffness and tracking resistance, this latter also in the presence of flame retardants and/or a reinforcing filler.

Thermoplastic polyester moulding composition containing flame retardant

Moulding compositions based on thermoplastic polyesters can be effectively protected against thermal degradation, if they contain, as a first stabilizer, a polyepoxide compound and, as a second stabilizer, a bisoxazoline or a dicarboxylic acid imide or amide.

Stabilized thermoplastic polyester moulding composition

Moulding compositions based on thermoplastic polymers, which compositions optionally contain fillers, reinforcing fillers and/or fire-retarding agents, have improved tracking resistance, and, in the case where a noninflammable finish has been imparted, they reduce both the corrosiveness on contact metals and the dripping tendency.

Thermoplastic moulding composition and the use thereof

A light-reflecting body, in particular a car headlight, whose wall consists of a poly-(1,4-butylene terephthalate) which contains 10-60% by weight of a filler, having a particle size of at most 30 .mu.m, chosen from the group comprising kaolin, talc, mica, wollastonite, glass beads, zinc sulfide, lithopone, calcium sulfate and barium sulfate, onto which wall is applied a light-reflecting metal layer, if necessary over a previously applied lacquer layer.

Light-reflecting body

The invention relates to moulding compositions based on thermoplastic polyesters and containing finely particulate dolomite. The moulded articles obtained with these compositions have increased stiffness and dimensional stability under heat. In the presence of flame retardants and/or a reinforcing filler, the addition of dolomite also improves the tracking resistance.

Thermoplastic moulding composition and use thereof

The invention relates to plastics moulding compounds which have been flame-proofed with organic chlorine- or bromine-containing compounds, said moulding compounds containing at least one aerosol selected from the group comprising the highly dispersed silicates, highly dispersed alumina, and highly dispersed titanium dioxide, and, optionally, a dibasic or tribasic oxyacid of phosphorus or an ester thereof. These moulding compounds have a reduced corrosive action on contact metals.

Flame-proofed plastics moulding compounds

The invention relates to glass-reinforced polyester moulding compounds which contain a polyester that is at least 90 mol. % a polyester of 1,4-butanediol and trans-1,4-cyclohexanedicarboxylic acid or polyester forming derivatives thereof. The content of glass fibres is preferably 2 to 60% by weight, based on the moulding compound. The moulding compounds of the invention have improved tracking resistance.

Glass-reinforced polyester moulding compounds

Matt films having a scratch-resistant surface are obtained from moulding compositions reinforced with glass spheres if the extruded film is stretched while still in the melt-fluid state, and then allowed to cool. These films are suitable for use as coating materials, especially for furniture, doors and the like.

Matt and scratch-resistant films and process for their manufacture

Thermoplastic moulding compositions of linear polyesters and styrene/acrylonitrile modified by .alpha.-methylstyrene and/or acrylates can readily be processed to give mouldings which have outstanding toughness characteristics and other mechanical properties. Furthermore, from these moulding compositions it is possible to produce sheets which can be hot-laminated without patterns applied thereto being destroyed.

Thermoplastic moulding composition and its use and sheets made from the

Copolyesters of terephthalic acid, 1,4-butanediol and an aliphatic dicarboxylic acid of the formula I

Thermoplastic moulding compositions

Moulding materials reinforced with fiber fillers and based on copolyesters of poly-1,4-butylene terephthalate are suitable for the manufacture of mouldings, especially those having thin walls, which have low tendency to distortion.

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Bensheim, Germany

Franz Breitenfellner