Abstract: The present invention provides thermoplastic polycarbonate blends which contain phosphonate amines and special graft polymers, which are prepared using redox initiator systems, and which are characterised by improved mechanical properties such as notched impact resistance, weld line strength and stress crack resistance.

Abstract: The present invention relates to polycarbonate blends containing phosphonate amine and inorganic nanoparticles, which have improved flame proofing and improved mechanical properties such as low-temperature impact strength, elongation at break, weld line strength and stress cracking resistance as well as an improved yellowness index.

Abstract: The present invention relates to polycarbonate moulding compositions provided with phosphonate amines and phosphorus compounds, which moulding compositions exhibit excellent flame protection and very good mechanical properties, such as joint line strength or modulus of elasticity, and a good crude shade.

Abstract: The invention relates to a flame-retardant coating which forms an insulating layer and is based on substances which carbonize and which form a foam layer in the event of a fire, on film-forming binders, on blowing agents and on customary auxiliaries and additives, wherein the blowing agent and foam layer forming substance present comprises melamine polyphosphate. The novel flame-retardant coating which forms an insulating layer is particularly stable under tropical conditions (at up to 100% rel. humidity, about 75° C.), i.e. it releases only an extremely small amount of NH3.

Abstract: The invention relates to a flame-retardant polyester or polyamide composition that contains a combination of a compound derived from triazine and an organic phosphorus compound. By choosing as the triazine compound a melamine condensation product, for example melam, a UL 94 V-0 and GWFI 960° classification can be obtained for glass-fibre reinforced polyester or polyamide with a relatively low concentration of flame-retardant additives, and without good mechanical properties being affected. Unusual is moreover that the CTI value can again be brought to 600 Volt for this glass-fibre reinforced polyester or polyamide. In a preferred embodiment use is made of a phosphorus-containing compound containing more than 14 wt. % P. The use thereof with for example melamine cyanurate results in optimum flame-retardant behaviour at a low total concentration of flame-retardant additives. Important additional aspects are improved crystallisation behaviour and a high stiffness.

Abstract: A thermoplastic molding composition that contains aromatic polycarbonate and/or polyester carbonate, a graft polymer, phosphazene compound, phosphorus compound and fluorinated polyolefin is disclosed. The composition exhibits excellent flame retardance and very good mechanical properties, including weld line strength and impact strength.

Abstract: The invention relates to thermoplastic copolycarbonate compositions and moulded parts containing the latter having improved stress cracking resistance and thermal stability.

Abstract: Polyolefin mouldings which have excellent stability on permanent contact with extracting media comprise, as stabilizers, a selected mixture comprising an organic phosphite or phosphonite and a specially selected group of sterically hindered phenols or a certain group of sterically hindered amines. In addition, a selected three-component mixture comprising a phosphite or phosphonite, a phenolic antioxidant and a certain group of sterically hindered amines is particularly suitable as stabilizer for polyolefin moldings which are in permanent contact with extracting media.

Abstract: A composition useful as a sealant, coating, a potting agent for a printed circuit board, a prepreg or an adhesive comprises a compound (A) wherein all or a part of the oxirane rings in an epoxy compound is replaced with thiirane rings represented by the following formula (1): or compound (A) and compound (B) which contains oxirane rings and no thiirane ring in the molecule, wherein the ratio of oxirane ring/thiirane ring is from 90/10 to 10/90.

Abstract: An object of this invention is to impart excellent flame retardancy to an aromatic polyamide resin without use of a halogen compound which is responsible for generation of gases harmful to the human body and without decreasing preferred properties (e.g. mechanical properties, and molding processability) inherently possessed by aromatic polyamide resins, the flame-retardant aromatic polyamide resin composition of this invention comprising (a) 100 parts by weight of an aromatic polyamide resin, (b) 0.1 to 100 parts by weight of a crosslinked phosphazene compound which is a compound crosslinked with a crosslinking group, such as phenylene groups, the crosslinking group being interposed between the two oxygen atoms left after the elimination of phenyl groups from the phosphazene compound, no free hydroxyl group being present in the molecule, the amount of all phenyl groups in the crosslinked compound being 50 to 99.

Abstract: Organic materials which possess outstanding stability to oxidative, thermal or light-induced degradation comprise as stabilizers at least one compound of the benzofuran-2-one type and at least one compound of the sterically hindered amine type.

Abstract: A hindered amine compound having thesolubility in an acidic solution of 5.0×10−3 eq./liter or less comprising at least two specific organic groups in a specific weight ratio in a molecule, or at least two specific monomeric units, which can be used as a stabilizer of a resin.

Abstract: The present invention relates to a stabilizer composition for organic polymer material containing (a) 6-hydroxychroman compound, a phosphorus antioxidant and (c) phenolic antioxidant, wherein the component (a) is contained in a proportion of 0.5 wt %-10 wt % and the total amount of the component (b) and the component (c) is in a proportion of 99.5 wt %-90 wt %, of the total amount of the components (a), (b) and (c). The present invention also relates to an organic polymer material composition containing an organic polymer and the above-mentioned stabilizer composition for organic polymer material. The use of the stabilizer composition of the present invention as a stabilizer for organic polymer materials affords an industrially extremely useful stabilized organic polymer material composition superior in heat stability during processing.

Abstract: The present invention relates to polycarbonate-ABS molding compositions containing phosphorus compounds which are group IB, IIB or VIII metal salts of partial phosphoric acid esters which have excellent mechanical properties, in particular excellent notched impact strength, stress cracking behavior and heat resistance.

Abstract: Thermoplastic molding compositions comprise A) from 5 to 97% by weight of a thermoplastic polymer selected from the group consisting of polyamides, polyesters, polyphenylene ethers, vinylaromatic polymers and mixtures of these, B) from 1 to 30% by weight of an alkylphosphonic acid compound of the formula I  where R is alkyl having from 1 to 4 carbon atoms and x is 0 or 1, C) from 1 to 30% by weight of a synergist for B) selected from the group consisting of inorganic calcium and magnesium compounds and mixtures of these, D) from 1 to 50% by weight of a fibrous filler and E) from 0 to 40% by weight of other additives and processing aids, where the sum of the percentages by weight of components A) to E) is always 100%.

Abstract: The invention relates to a flame-retardant coating which forms an insulating layer and is based on substances which carbonize and form a foam layer in the event of a fire, on film-forming binders, on blowing agents and on customary auxiliaries and additives, wherein the blowing agent present comprises melamine polyphosphate. The novel flame-retardant coating which forms an insulating layer is particularly stable under tropical conditions (up to 100% rel. humidity, about 75° C.), i.e. it releases only an extremely small amount of NH3.

Abstract: A pentavalent phosphorous compound represented by the formula (I): wherein RA forms a cyclic group together with E, O and P, E represents a direct bond or oxygen atom, F represents a connecting group, and RB represents a phenyl group which may be optionally substituted; and the pentavalent phosphorous compound is useful as a stabilizer for an organic material.

Abstract: The present invention relates to a stabilizer mixture prepared by partially condensing PCl3 with 2,2′-dimethyl-4,4′-dihydroxy-5,5′-di-tert-butyldiphenyl sulfide, where the phosphorus content is from 2 to 4% by weight and the content of 2,2′-dimethyl-4,4′-dihydroxy-5,5′-di-tert-butyldiphenyl sulfide is from 0.5 to 50% by weight. The stabilizer mixture has very good solubility in organic solvents and in the polymer and has very good stabilizing action.

Abstract: A resin composition comprising polystyrene having the syndiotactic configuration (SPS) showing improved heat stability in heat molding at a high temperature is obtained by adding a combination of a phenolic antioxidant and an antioxidant containing phosphorus to SPS. The molded article is obtained by using the resin composition as the material. Additional use of an antioxidant containing sulfur gives more excellent improvement. The composition may further contain another thermoplastic resin and/or rubber elastomer, a polymer exhibiting compatibility with or affinity for SPS and having a polar group, and/or an inorganic filler in accordance with necessity.

Abstract: A diphosphite is provided derived from phosphorous trihalide, tetra alkyl hindered bisphenol, and a neoalkyl diol. The phosphites exhibit improved stability and are useful as thermal oxidative stabilizers for thermoplastic compositions.

Abstract: The present invention relates to a thermoplastic resin composition comprising: (A) 95 to 5 parts by weight of an aromatic polycarbonate, (B) 5 to 95 parts by weight of a styrene-based resin, and (C) a melt kneaded resin composition comprising a polyphenylene ether and a saturated polyester, the amount of component (C) being 1 to 50 parts by weight based on 100 parts by total weight of the components (A) and (B).

Abstract: A polymer composition and fiber, film and fabric prepared therefrom. The composition contains (i) an acid neutralizing agent other than a metallic salt of a saturated or unsaturated fatty acid, (ii) a processing aid comprising a metallic salt of a saturated or unsaturated fatty acid, the metallic salt of a saturated or unsaturated being present in a maximum amount of 200 ppm, a stabilizer system containing (a) a phosphite selected from the group consisting of 2,2′,2″-nitrilo[triethyl-tris(3,3′,5,5′-tetra-tert.butyl-1, 1-biphenyl-2,2′-diyl)phosphite] and tris(2,4-di-tert-butylphenyl) phosphite; and (b) a N,N-dialkylhydroxylamine. Also disclosed is a method for preparing a polyolefin fiber, film or fabric which includes (A) incorporating the above additives into an olefin polymer, thereby producing a stabilized polyolefin polymer; and (B) extruding the stabilized olefin polymer through a die, thereby producing a olefin polymer fiber or film.

Abstract: A homogeneous blended additive useful as a processing stabilizer for polymers which is a blend of Component (a), a defined phosphite or phosphonite; and Component (b) which is micronized zinc oxide. Component (b) is preferably in an amount of 5 to 10% based on the weight of component (a). This additive composition improves the resistance of phosphites and phosphonites against hydrolysis in the presence of moisture, by providing Component (b) as a hydrolysis stabilizer for Component (a).

Abstract: Compositions, comprising (i) a halogen-containing polymeric material, and(ii) at least one phosphite of formula I ##STR1## wherein n is a number from 1 to 6,R is a divalent linking group of formulae as defined herein as well as of novel compounds of formula I and their use as stabilisers.

Abstract: A process is described for the preparation of olefin polymers by polymerization over a transition metallocene catalyst with the addition of at least one phosphorus(III) compound, sterically hindered amine, sterically hindered phenol or acid scavenger, alone or in combination with one another; the polymers which can be obtained in this way are of outstanding stability.

Abstract: A description is given of novel compounds of formula I ##STR1## wherein R.sup.1, R.sub.2, R.sub.3, and R.sup.4 are hydrogen, alkyl, phenylalkyl, or alkoxy and where R.sub.5 and R.sub.6 are hydrogen or phenyl or together with the linking carbon atoms, are cycloalkenylene or cycloalkenylene which is interrupted by oxygen or sulfur. These compounds are useful as stabilizers for organic materials against oxidative, thermal or light-induced degradation.

Abstract: The present invention relates to a solution of a polyacrylate resin in one or more organic solvents, containing one or more phosphites, characterized in that the solution contains from 0.05 to 1.0% by weight, based on the solids content of the acrylate resin solution, of one or more phosphites and in that the phosphite has been added, either partially or entirely, after the polymerization reaction, at a temperature below the polymerization temperature.The present invention further relates to coating compositions which contain these polyacrylate resin solutions, their use in processes for producing a multilayer protective and/or decorative coating on a substrate surface, and the use of the coating compositions in the automotive refinishing sector.

Abstract: Phosphonites which are useful as a deterioration inhibitor for organic material and are represented by the following formula: ##STR1## wherein X represents a connecting group, and R.sup.A represents a phenyl group which may be optionally substituted; and a process for producing the same are provided.

Abstract: Disclosed is a thermally stable aromatic polycarbonate composition comprising an aromatic polycarbonate, which is substantially free of a chlorine-containing compound, and a thermal stabilizer, the aromatic polycarbonate comprising a plurality of aromatic polycarbonate chains, each comprising recurring aromatic carbonate units and having a terminal aryl carbonate group and a terminal hydroxyl group, wherein each recurring unit has a divalent aromatic or pyridylene group comprising one or more divalent constituent aromatic or pyridylene groups, and wherein the plurality of aromatic polycarbonate chains collectively contain at least one constituent aromatic or pyridylene group substituted with at least one methyl group in an amount of 0.0001 or less in terms of the molar ratio of the methyl group substituted constituent group or groups relative to all constituent groups in the aromatic polycarbonate chains.

Abstract: A description is given of a process for the production of polyolefin hollow articles, which comprises charging the polyolefin with a stabilizer combination, comprising (A) at least one compound from the group of the organic phosphites or phosphonites, and (B) at least one compound from the group of the 3-arylbenzofuranones, filling this mixture into a mold, heating this mold in an oven to above 280.degree. C., such that the stabilised polyolefin fuses, rotating the mold around at least 2 axes, the plastic spreading to the walls, and cooling the mold while still rotating, opening it and taking the resultant hollow article out.

Abstract: Phosphites which are useful as a deterioration inhibitor for organic material and are represented by the following formula: ##STR1## wherein R.sup.1, R.sup.2, R.sup.5 and R.sup.6 represent a hydrogen atom, an alkyl group, a cycloalkyl group, an alkylcycloalkyl group, an aralkyl group or a phenyl group;R.sup.3 represents hydrogen atom or an alkyl group;R.sup.4 represents a hydrogen atom, an alkyl group, a cycloalkyl group, an alkylcycloalkyl group, an aralkyl group or a phenyl group, or the two R.sup.4 together form a direct bond, a group represented by --S-- or an optionally substituted methylene group;A represents an alkylene group;W represents a group represented by --O-- or a group represented by --NR.sup.7wherein R.sup.7 represents a hydrogen atom, an alkyl group, etc.;B represents an alkylene group;and one of Y and Z represents a hydroxyl group, an alkoxy group or an aralkyloxy group, and the other one represents hydrogen atom or an alkyl group.

Abstract: Plastic mixtures, in particular recycled plastic mixtures, comprising predominantly polyolefins and 0.05-20% by weight of PVDC can be stabilized against thermo-oxidative degradation by addition of a combination of an organic phosphite or phosphonite and a metal salt of a fatty acid.

Abstract: A polyamide composition which is amorphous and transparent, which has reduced flammability, and which has reduced migration of flame-retardant additive so that it is film-free, includes at least one polyamide which contains cycloaliphatic monomer units and which is amorphous and transparent; and a flame-retardant additive which is present in an amount effective to reduced flammability of the polyamide composition, which is dissolved in the at least one polyamide, and which is at least one alkyl phosphonic acid compound having a general formula: ##STR1## wherein R and R' each represent, independent of each other, an alkyl group having from 1 to 4 carbon atoms, and x=0 or 1. An article molded from this composition is transparent, has reduced flammability, and has reduced migration of flame-retardant additive so that it is film-free.

Abstract: A polymer composition and fiber, film or sheet prepared therefrom, which contains (i) an olefin polymer containing an acid neutralizing agent other than a metallic salt of a saturated or unsaturated fatty acid, and ii) a stabilizer system distributed throughout the polymer, the stabilizer system including (a) a phosphite selected from 2,2',2"-nitrilo?triethyl-tris(3,3',5,5'-tetra-tert.butyl-1,1-biphenyl-2,2' -diyl)phosphite! and tris(2,4-di-tert-butylphenyl) phosphite; and (b) a N,N-dialkylhydroxylamine. Also disclosed is a method for preparing a polyolefin fiber, film or sheet, which includes adding the above stabilizer to an olefin polymer containing an acid neutralizing agent other than a metallic salt of a saturated or unsaturated fatty acid, thereby producing a stabilized olefin polymer; and extruding the stabilized olefin polymer through a die.

Abstract: A thermoplastic molding composition comprising poly(butylene terephthalate), a reinforcing component, and a mixed flame retardant containing melamine pyrophosphate and an aromatic phosphate oligomer in selected proportions exhibits improved flame resistance, relatively low melt viscosity for good melt processability, and good physical properties, particularly tensile strength and tensile elongation.

Abstract: The present invention relates to a process for preparing the .alpha. crystal modification of 2,2',2"--nitrilo?triethyltris(3,3',5,5"--tetra--tert--butyl--1,1'--bipheny l--2,2'--diyl) phosphite! (abbreviated as NTTBP) of the formula ##STR1## which comprises dissolving the NTTBP in the form of its melt, its amorphous solid-phase modification or its .beta. crystal modification, hot, at 40 to 100.degree. C., in short-chain ketones having 3 to 7 carbon atoms, such as methyl ethyl ketone or, in particular, acetone, and then initiating crystallization by cooling to room temperature.

Abstract: An ionizing radiation-resistant polycarbonate resin composition comprising 0.1 to 10 parts by weight of an organic compound having one carbon--carbon unsaturated double bond forming a non-bonding orbital in the molecule based on 100 parts by weight of a polycarbonate resin, and a medical part comprising the same. The polycarbonate resin composition and the medical part comprising the same exhibit less deterioration of color and physical properties even when irradiated with ionizing radiation for sterilization, and are, therefore, useful as a medical part material and a medical part.

Abstract: Recycled plastics, predominandy thermoplastics, from domestic, commercial and industrial waste can be stabilized against thermooxidative degradation by adding a combination of a sterically hindered phenol with an organic phosphite or phosphonite and a metal salt of a fatty acid.

Abstract: A diphosphite is provided derived from phosphorous trihalide, tetra alkyl hindered bisphenol, and a neoalkyl diol. The phosphites exhibit improved stability and are useful as thermal oxidative stabilizers for thermoplastic compositions.

Abstract: This invention relates to compositions comprising a polyamide, polyester or polyketone, a specific organic phosphite (Irgafos.RTM.12, Ciba-Geigy) and a sterically hindered phenol such as Irganox.RTM.1098, Irganox.RTM.1076, Irganox.RTM.1010, Irganox.RTM.245, Irganox.RTM.259, Irganox.RTM.1035, Irganox.RTM.3114 or Irganox.RTM.3125 (Ciba-Geigy), to the use thereof for stabilising polyamide, polyester or polyketone against oxidative, thermal and/or light-induced degradation, as well as to a process for stabilising these plastic materials.

Abstract: A diphosphite is provided derived from phosphorous trihalide, tetra alkyl hindered bisphenol, and a neoalkyl diol. The phosphites exhibit improved stability and are useful as thermal oxidative stabilizers for thermoplastic compositions.

Abstract: A polyphenylene ether resin composition containing the following Components (A) to (D) according at the following formulation ratio.(A) 50 to 99.5 parts by weight of a polyphenylene ether(B) 0.5 to 50 parts by weight of a partially hydrogenated aromatic alkenyl compound-conjugated diene block copolymer having a hydroxy group and based on 100 parts by weight of the above resin composition,(C) 0 to 950 parts by weight of a thermoplastic resin and(D) 0 to 10 parts by weight of a phosphorous acid triester.

Abstract: A process is described for the preparation of olefin polymers by polymerization over a transition metallocene catalyst with the addition of at least one phosphorus(III) compound, sterically hindered amine, sterically hindered phenol or acid scavenger, alone or in combination with one another; the polymers which can be obtained in this way are of outstanding stability.

Abstract: A solid amorphous phosphite stabilizer composition is provided which exhibits enhanced hydrolytic stability. The stabilizer composition preferably contains from 10 to 99.9 percent by weight of a phosphorous compound selected from phosphites and phosphonites, and preferably contains from 0.1 to 10 percent by weight of an aliphatic polyamine. The stabilizer composition exhibits enhanced hydrolytic stability, and is preferably in the form of powders or flakes. The stabilizer composition is useful as an additive to polymeric resins as an antioxidant stabilizer.

Abstract: The new amorphous modification of 1,1',1"-nitrilo{triethyl-tris-[2,2'-methylene-bis(4,6-di-tert-butylphenyl) ]phosphite} is obtained by cooling rapidly said compound from the melt to ambient temperature. This amorphous form is an effective process stabilizer for polyolefins, particularly polypropylene.

Abstract: The new crystalline modification of 1,1',1"-nitrilo{triethyl-tris-[2,2'-methylene-bis(4,6-di-tert-butylphenyl) ]phosphite} is obtained by crystallizing said compound from the melt at elevated temperatures. This crystalline form is an effective process stabilizer for polyolefins, particularly polypropylene. The instant crystalline form exhibits better handling characteristics, apparent density, flowability, meterability, storage and hydrolytic stability than the prior art powdery product.

Abstract: A propylene resin composition comprising: a polypropylelne having specific physical properties, 25.about.40% by weight; a propylene-ethylene block copolymer, 25.about.45% by weight; an ethylene-propylene rubber, 5.about.15% by weight; an ethylene-.alpha.-olefin copolymer, 5-15% by weight; and a talc, 5-30% by weight; is superior in all of the following properties concurrently: rigidity, heat resistance, impact resistance, surface hardness, etc.; and is suited for use in machine parts such as automobile parts; electric and electronic parts; packaging materials, engineering plastic substitutes, etc.

Abstract: A polymer composition is provided comprising an ultraviolet light sensitive phosphite and an amount of a polyamine effective to enhance the resistance of the color formation upon exposure to ultraviolet light. A process is also provided for applying ink to a thermoplastic substrate involving ultraviolet light curing of the ink. The thermoplastic compositions are useful for making article which contain UV sensitive phosphites for oxidative stability and also exhibit resistance to ultraviolet light yellowing of the phosphite. The inking process resists detrimental yellowing of the composition upon exposure to high levels of ultraviolet light radiation.

Abstract: The alpha crystalline modification of 2,2',2"-nitrilo triethyl-tris-(3,3',5,5'-tetra-tert-butyl-1,1'-biphenyl-2, 2'-diyl)phosphite! is obtained by crystallizing said compound from selected solvents, preferably from a mixture of an aromatic hydrocarbon solvent and a lower alkanol.The alpha crystalline form is an effective process stabilizer for polyolefins, particularly polypropylene.

Abstract: Phillips' process high density polyethylene resin compositions having improved processing stability are obtained using a combination of stabilizers comprised of a hindered phenol and a phosphite compound having three cyclic phosphite moieties linked via a nitrogen atom. More specifically, the phosphite compound is 2, [[2,4,8,10-tetrakis(1,1-dimethylethyl)dibenzo[d,f][1,3,2]-dioxaphosphepin- 6-yl]oxy]-N,N-bis [2-[[2,4,8,10-tetrakis (1,1-dimethylethyl) dibenzo[d,f][1,3,2]dioxaphosphenpin-6-yl]oxy]-ethyl]ethanamine. With the HDPE compositions stabilized in accordance with the invention, it is possible to eliminate undesirable rapid changes in melt viscosity which can occur when Phillips' process HDPE resins are processed under conditions of high shear.