Bayer Aktiengesellschaft

Erich Eimers

Rolf Dhein

Dieter Margotte

Wolfgang Cohnen

Hans-Josef Buysch

Bert Brassat

Rolf Wiedermann

Klaus Kraft

Karl H Hermann

Helmut Schmid

Engelbert Kuhle

Hans-Joachim Traenckner

Hans J Rosenkranz

Karlheinz Wolf

Reinhold Hornle

Hermann Perrey

Klaus Kircher

Gerhard Heywang

Konrad Nonn

Hans-Michael Fischler

Rolf Dheim

The present invention is directed to stabilizer compositions or thermoplastic polycarbonates based on phosphites and siloxane-oxetane compounds. These stabilizers protect the polycarbonate against heat and oxidative degradation, and in addition, increase the hydrolysis resistance of the polycarbonate. The present invention is also directed to a process for stabilizing polycarbonate and to the stabilized polycarbonate produced therefrom.

Stabilizer compositions, their use for stabilizing thermoplastic,

Anilines substituted in the m- and p-position by an alkyl radical and a halogen atom are eminently suitable for use as accelerators for cold-hardening unsaturated polyester resins.

Use of 3,4-disubstituted anilines as accelerators for unsaturated

Certain solutions of phosphines in oxetane compounds impart oxidative stability to aromatic thermoplastic polycarbonates in which such solutions are admixed.

Solutions for stabilizing thermoplastic polycarbonates

Phosphorous acid esters obtained by reacting bisphenols with phosphorous trihalogenide or triphosphite and optionally or mono- or polyhydroxy compound are especially useful for stabilizing polyamides.

Phosphorous acid esters and their use for stabilizing polyamides

The 1:1-adduct of 1.3-butadiene and dicyclopentadiene is an excellent reactive thinner for air-drying lacquers.

Hydrocarbon, a process for its production and its use as a reactive

Phosphites of the general formula: ##STR1## in which n.sub.1 is an integer;

Esters of phosphorous acid

Phosphorous acid esters obtained by reacting bisphenols with phosphorous trihalogenide or triphosphite and optionally or mono - or polyhydroxy compound are especially useful for stabilizing polyamides.

Cyclic phosphorous acid esters

Phosphite-free polycarbonate molding compositions are provided which contain either a boric acid ester containing oxetane groups, a mixture of a boric acid ester containing oxetane groups and a boron-free oxetane compound or a mixture of a boric acid ester which is free from oxetane groups and a boron-free oxetane compound, in amounts between about 0.01 and 1% by weight, relative to the weight of pure polycarbonate resin. A process for stabilizing phosphite-free polycarbonate compositions to light and heat without impairing their resistance to hydrolysis is also provided by the incorporation of either a boric acid ester containing oxetane groups, a mixture of a boric acid ester containing oxetane groups and a boron-free oxetane compound or a mixture of a boric acid ester which is free from oxetane groups and a boron-free oxetane compound.

Boric acid esters and oxetanes for stabilizing phosphite-free

Mixture of I. nucleus-unsubstituted or m-substituted N.N-dialkanol arylamides and II. p-substituted arylamines obtained by reaction of I. with diisocyanates and/or dicarboxylic acids work as excellent accelerators in unsaturated polyester resin compositions which then show a favorable pot-life, high stability in storage and rapidly obtainable sandability.

Accelerator mixture for unsaturated polyester resin compositions

The instant invention is broadly directed to novel polyether esters and the use thereof in manufacturing polyurethane resins. The novel products are produced by esterifying an alkoxylated, halogenated bisphenol, a polycarboxylic acid and a dihydric alcohol.

Polyetheresters which contain hydroxyl groups and the use thereof in the

Anionic dyestuffs which contain, as the cation an ammonium ion of the formula ##STR1## wherein R.sub.1 and R.sub.2 independently of one another denote hydrogen, C.sub.1 -C.sub.6 -alkyl which is optionally substituted by hydroxyl, cyclopentyl, cyclohexyl or phenyl, naphthyl or benzyl which are optionally substituted by halogen, C.sub.1 -C.sub.4 -alkyl or C.sub.1 -C.sub.4 -alkoxy, or one of the radicals --(CH.sub.2 --X--O).sub.n --H, [-alkylene-N (R.sub.3 --].sub.P --R.sub.3 or -arylene-N (R.sub.3)--(CH.sub.2 --X--O).sub.n --H or denotes, together with the nitrogen atom, a 5-membered to 7-membered heterocyclic radical,

Dyestuff salts

Unsaturated polyester resins which are suitable for the production of cross-linked polyesters which are with difficulty to saponify contain, in part at least, radicals of 2-alkyl-1.3-propane diols as the alcohol component.

Unsaturated polyester resins suitable for the production of cross-linked

The present invention teaches mixtures of neutral esters of phosphorous acid with oxetane compounds and plastics stabilized by the incorporation of said mixtures. The present invention teaches a method of improving the retention of light transmission in plastics, particularly polycarbonate, by the incorporation therein of mixtures of neutral esters of phosphorous acid and oxetane compounds in which there are 2 to 10 oxetane groups per phosphorus atom.

Stabilizer mixtures

Phosphites of the general formula: ##STR1## in which N.sub.1 IS AN INTEGER;

The instant invention is broadly directed to novel hydroxyl containing compositions and the use thereof in producing polyurethane resins. The novel products are produced by mixing a halogenated bisphenol with a hydroxypolyester and thereafter alkoxylating the mixture.

Growing community of inventors

Krefeld, Germany

Erich Eimers