Abstract: A biaxilly oriented polymer film having improved surface properties, anti-static property and printability is prepared from a mixture of 70 to 99 parts by weight of a polyester resin containing not less than 60% by weight of repeating units of ethylene terephthalate and having an intrinsic viscosity ranging from 0.4 to 0.9 dl/g, and 1 to 30 parts by weight of polyolefin resin having a melting flow index ranging from 1.5 to 25 g/10 min, wherein said polyester film further comprises 0.1 to 25 parts by weight of an inorganic particle.

Abstract: This invention relates to new and useful melt blend compositions of polyethylene terephthalate and polyethylene isophthalate, and melt blend compositions of polyethylene terephthalate with random copolymers of polyethylene terephthalate and polyethylene isophthalate wherein each polyester contains an interesterification inhibitor, wherein the resulting melt blend composition of polyesters retain the predominant characteristics of the predominant polyester by weight of the melt blend composition. The extruded polymer melt blend compositions have utility as shrink fiber and film, and as adhesives in the form of powdered binders for non-woven fabrics.

Abstract: This invention relates to aliphatic copolyesters prepared from succinic acid (or derivatives thereof) and a process for the preparation thereof. The aliphatic copolyesters contain a second component, 1,4-butanediol, and a third component which is either a diacid or a diol (or derivatives thereof).

Abstract: A resin composition for extrusion molding which has a melt flow rate (MFR) of from 0.5 to 30 g/10 min., having (A) 1 to 80 parts by weight of an ethylenic polymer which gives an endothermic peak in a temperature range of from 80.degree. to 120.degree. C. in a temperature rise thermogram as measured by a differential scanning calorimeter, has a melt flow rate (MFR) of from 0.5 to 50 g/10 min., and is prepared by high-pressure radical polymerization, (B) 5 to 80 parts by weight of a copolymer of ethylene and an .alpha.-olefine containing 3 to 12 carbon atoms which gives at least one endothermic peak in a temperature range of from 110.degree. to 130.degree. C. in the temperature rise thermogram as described above, has a melt flow rate (MFR) of from 0.5 to 30 g/10 min. and a density of from 0.900 to 0.935 g/cm.sup.3 and (C) 5 to 70 parts by weight of the copolymer of ethylene and an .alpha.-olefin containing 3 to 12 carbon atoms which has a melt flow rate (MFR) of from 0.5 to 30 g/10 min. and a density of from 0.

Abstract: A description follows of vulcanizable compositions of nitrile rubbers containing a plasticizer, a vulcanizing agent and normal additives, wherein the plasticizer is an organic carbonate selected from those which can be defined with the formula (I): ##STR1## or with the formula (II): ##STR2## wherein R, R.sup.1, R.sup.2, X and n are as defined in the description.

Abstract: Reduced gloss polycarbonate graft polymer blends are provided by a process which involves compounding styrene-acrylonitrile copolymer in the presence of an electrophilic reagent and preferably an acid to form gels, and then compounding the resultant gels with polycarbonate, a styrene-acrylonitrile copolymer and ABS graft polymer to form reduced gloss PC/ABS/SAN composition. The process limits side reactions during gel formation by preparing the gels first and then compounding the gels with the other resin materials. The blends are useful as molding resins and the gelled acrylonitrile polymer is useful as a gloss reducing additive.

Abstract: An acrylic resin composition comprising at least one polyamide elastomer consisting of hard segments and soft segments in a specified ratio, an acrylic resin and optionally at least one electrolyte, which has excellent permanent antistatic properties, is good in transparency, has a very faint color, is inexpensive, and is only slightly deteriorated in transparency even when immersed in water.

Abstract: A stabilizer composition useful as an additive for polyether polyols, particularly those employed in the manufacture of polyurethane foams, is provided which comprises a diphenylamine:isobutylene:diisobutylene reaction product, a sterically hindered phenol and a trihydrocarbyl phosphite.

Abstract: A radiation-resistant polypropylene resin composition is disclosed which comprises a polypropylene having a substantially syndiotactic structure, and if desired, a phosphorus-containing anti-oxidant, an amine-containing anti-oxidant and/or a nucleating agent. Molded articles obtained from this resin composition can be utilized as containers for foods and medicines, and their physical properties scarcely deteriorate during sterilization by radiation.

Abstract: A radiation-resistant polypropylene resin composition is disclosed which comprises a polypropylene having a substantially syndiotactic structure, and if desired, a phosphorus-containing anti-oxidant, an amine-containing anti-oxidant and/or a nucleating agent. Molded articles obtained from this resin composition can be utilized as containers for foods and medicines, and their physical properties scarcely deteriorate during sterilization by radiation.

Abstract: Polymer compositions having enhanced biodegradability are disclosed. The compositions comprise a blend of:(1) a polymer containing hydrolyzable bonds; and(2) a substantially water-insoluble, pH-modifying compound capable of accelerating the hydrolysis of the hydrolyzable bonds in the polymer.The invention also relates to polymer films comprising such compositions and absorbent articles containing such polymer compositions or films. The compositions are particularly suitable for use in disposable absorbent articles such as diapers.

Abstract: The present invention provides an antistatic and flame retardant thermoplastic resin composition which comprises [A] 100 weight parts of a thermoplastic resin, [B] 2.0 to 40 weight parts of a bromine-containing organic flame retardant, and [C] 1.0 to 30 weight parts of a (meth)acrylamide-based copolymer and/or a (meth)acrylate ester-based copolymer each comprising 65 to 99 mole percent of an olefin-derived structural unit (I), 0 to 15 mole percent of a (meth)acrylate-derived structural unit (II) and 1 to 35 mole percent of a (meth)acrylamide-derived or (meth)acrylate ester-derived structural unit (III), as arranged linearly, with a weight average molecular weight of 1,000 to 50,000.

Abstract: Selected alkanolamine esters of acyclic phosphites are particularly effective as process stabilizers for polyolefins providing for melt flow stabilization and resistance to discoloration during said processing.

Abstract: A mixture containing phenothiazines which is obtainable by reacting a mixture of diphenylamines comprising______________________________________ 1 to 5% by weight a) diphenylamine of 8 to 18% by b) 4-tert-butyldiphenylamine weight of 21 to 31% by c) one or more compounds selected from weight of i) 4-tert-octyldiphenylamine ii) 4,4'-di-tert-butyldiphenylamine iii) 2,4,4'-tris-tert-butyldiphenylamine 20 to 31% by d) one or more compounds selected from weight of i) 4-tert-butyl-4'-tert-octyldiphenylamine ii) 2,2'- or 2,4'-di-tert-octyldiphenylamine iii) 2,4-di-tert-butyl-4'-tert-octyldiphenylamine, and 15 to 29% by e) the compound weight of i) 4,4'-di-tert-octyldiphenylamine, or the compounds i) 4,4'-di-tert-octyldiphenylamine and ii) 2,4-di-tert-octyl-4'-tert-butyldiphenylamine, ______________________________________with 1 to 200 mol % of elemental sulfur, in the presence of 0.

Abstract: An improved synthetic resin composition is provided that consists essentially of 100 parts by weight of a resin component composed of 50 to 99 (preferably 50 to 90) parts by weight of a melt-processable polyester that does not form an anisotropic melt phase and 1 to 50 (preferably 10 to 50) parts by weight of a liquid crystal polyester that is capable of forming an anisotropic melt phase, to which has been added 0.01 to 0.5 part by weight of a phosphorus compound. The presence of the phosphorus compound has been found to facilitate the fibrillation of the liquid crystal polyester component during molding so as to form fibrils within the resulting molded article having an aspect ratio of 6 or more. The resulting molded article accordingly exhibits significantly enhanced mechanical properties.

Abstract: This invention relates to aliphatic copolyesters prepared from succinic acid (or derivatives thereof) and a process for the preparation thereof. The aliphatic copolyesters contain a second component, 1,4-butanediol, and a third component which is either a diacid or a diol (or derivatives thereof).

Abstract: High molecular weight thermoplastic molding materials are obtainable by mixingA) 20-80% by weight of a polyphenylene ether andB) 0-70% by weight of conventional additives and processing assistantsinto a melt ofc) 10-80% by weight of a low molecular weight polyamide having a viscosity number of from 40 to 185 ml/gand subsequently carrying out solid-phase postcondensation.

Abstract: Disclosed is a clarifying composition mainly containing a phosphonite stabilizer composition, the main component of which is tetrakis-(2,4-di-tert-butylphenyl)-4,4-biphenylene diphosphite, with certain sorbitol based compounds having a melting point of greater than 200.degree. C., a process for preparing the clarifying compositions and polyolefin compositions containing the clarifying composition.

Abstract: This invention relates to a polyester composition comprisinga) a polyester having repeat units from terephthalic acid and 1,4-cyclohexane dimethanol, said polyester having an I.V. of 0.5-2.0 g/dL, andb) about 1-10% by weight of the total composition of an ether compound having the formulawherein R and R' having from about 1 to about 30 carbon atoms are univalent hydrocarbon radicals, A and A' having from about 6 to about 18 carbon atoms are aromatic radicals, and --X-- is a chemical bond or divalent coupling radical.

Abstract: Disclosed are reinforced polyester compositions having repeat units from terephthalic acid and 1,4-cyclohexanedimethanol which have improved melt stability due to the addition of small amounts of an epoxy compound and either a phosphite or phosphonite.

Abstract: A process for stabilizing polymers is provided comprising:(1) contacting at least one hindered phenolic compound and an organic phosphite to form a stabilizing mixture,wherein said contacting is at a temperature sufficient to at least partially dissolve said hindered phenolic compound,wherein said stabilizing mixture is essentially free of organic solvent; and(2) contacting said stabilizing mixture and a polymeric composition comprising a monovinylarene/conjugated diene copolymer;wherein said organic phosphite and said at least one hindered phenolic compound are present in step (2) in an effective amount sufficient to stabilize said polymeric composition. In accordance with another aspect of this invention a method for preparing a stabilizing mixture essentially free of organic solvent is provided.

Abstract: A resin composition for forming a core for web material comprising 70 to 30 wt. % of polypropylene resin having a melt index of 10 to 60 g/10 minutes, a bending elastic modulus of more than 8,000 kg/cm.sup.2, an Izod impact strength of more than 2 kg.cm/cm and a Rockwell hardness of more than 70 R, 30 to 70 wt. % of linear low density polyethylene resin having a melt index of 3 to 50 g/10 minutes, a density of 0.910 to 0.935 g/cm.sup.3, an Olsen rigidity of more than 1,500 kg/cm.sup.2 and a Shore hardness of more than 40 D, more than 0.01 wt. % of a lubricant and more than 0.01 wt. % of an antioxidant.The resin composition is a light weight and excellent in injection moldability, appearance, dropping strength, solvent resistance, transparency, processibility, wear resistance, dimensional accuracy, and little molding troubles such as sink marks, resin remaining at gate, stringiness, weld lines, twist and deformation, add nevertheless, it has a flexibility.

Abstract: A highly antioxidant resin composition containing a resin, a solution of a hypophosphite compound in an organic solvent, a heat stabilizer and a hindered amine base weathering stabilizer, which has improved heat stability and weather resistance. The hypophosphite compound is preferably dissolved in a polyvalent alcohol having a molecular weight of not more than 50,000.

Abstract: A thermoplastic resin composition having in admixture a polyphenylene ether resin and an elastomeric block copolymer wherein the block copolymer has in admixture a triblock copolymer A-B-A' and a diblock copolymer A-B with A and A' being polymerized vinyl aromatic hydrocarbon blocks such as styrene and B being an ethylene-alkylene block such as ethylene-butylene. The composition of this invention can also include other additives such as siloxane fluids, flame retardants, polyolefins, and phosphates, as well as fillers, etc. Also included in this invention is the process of preparing such compositions and articles of manufacture prepared therefrom, such as electrical conductor articles or formed articles. The compositions of this invention provide improved flexibility and elongation.

Abstract: An organic phosphite composition is provided comprising organic phosphite particles having organic phosphite cores coated with an aminofunctional organic polysiloxane. Blends of the phosphite and the aminofunctional organic polysiloxane are also provided. The phosphite particles exhibit high levels of resistance to hydrolysis and are useful as antioxidant additives for thermoplastic compositions.

Abstract: A halogen group solvent comprising a mixed solvent consisting essentially of bromochloromethane and/or 1,2-dichloroethylene and a co-solvent, wherein the co-solvent is at least one member selected from the group consisting of carbon dioxide, sulfur hexafluoride, difluorochloromethane, 1,1,1,2-tetrafluoroethane, etc., and the content of said co-solvent in the mixed solvent is 3 to 65% by weight; a polyolefin solution using the solvent; and a process for producing a three-dimensional fiber of a polyolefin using the solution.

Abstract: A polyolefin composition comprising a polyolefin, and the following components:(A) a phenolic compound such as 1,3,5-tris(3,5-di-t-butyl-4-hydroxybenzyl) isocyanurate;(B) an acrylate compound represented by the formula (I): ##STR1## wherein R.sup.1 is an alkyl of 1 to 5 carbon atoms, R.sup.2 is an alkyl of 1 to 8 carbon atoms, R.sup.3 is hydrogen or an alkyl of 1 to 8 carbon atoms, and R.sup.4 is hydrogen or methyl;(C) an organic phosphorous compound such as bis(2,6-di-t-butyl-4-methylphenyl) pentaerythritol diphosphite; and(D) a hindered piperidine compound such as poly[{6-(1,1,3,3-tetramethylbutyl)imino-1,3,5-triazin-2,4-diyl}{(2,2,6,6-t etramethyl-4-piperidyl)imino}hexamethylene{(2,2,6,6-tetramethyl-4-piperidyl )imino}]. This composition is stable against thermal processing, thermal oxidation, light oxidation and discoloration, and it is especially useful for fibers and films.

Abstract: The invention relates to a process for producing chain extended polyamide compositions which comprise one or more polyamides and one or more lactamyl phosphites.

Abstract: A polyolefin resin composition for a film which consists essentially of a mixture of 100 parts by weight of a polyolefin resin with (a) 0.01-3.0 parts by weight of an antiblocking agent, the surface OH group content of which is 200 .mu.mol/g or less. The resin composition may further contain (b) 0.05-2.0 parts by weight of an antistatic agent consisting of (A) a glycerine fatty acid ester and (B) an alkyldiethanolamide in a weight ratio of A/B of 50/50-95/5 for antistatic film or (c) 0.05-3.0 parts by weight of at least one member selected from the group consisting of polyhydric alcohol fatty acid esters, alkylene oxide adducts of polyhydric alcohol fatty acid esters and higher alcohol-alkylene oxide adducts as an antifogging agent, or (d) 0.01-3.0 parts by weight of a phenol type antioxidant and (e) 0.01-0.2 part by weight of a phosphorous type antioxidant for forming a stabilized film.

Abstract: Disclosed are polyester adhesive compositions which exhibit increased melt viscosity and improved adhesion comprised of residues of terephthalic acid, ethylene glycol and diethylene glycol and having reacted therewith or copolymerized therein the residue of a phosphite ester compound and optionally containing a phenolic antioxidant. Also disclosed are articles coated with the polyester compositions and bonded laminate articles based on the compositions.

Abstract: Compositions containing an aryl phosphite and water to hydrolyze the aryl phosphite provide controlled and extended work time when used as hardening agents for the ambient temperature hardening of phenolic resins and for rapid hardening of such resins at modestly elevated temperatures. Pre-solvolysis with small quantities of water, alkanols of 1 to 4 carbon atoms or alkylene glycols of 2 to 4 carbon atoms improve compatibility of trisubstituted phosphites with the resin. Pre-hydrolysis of the phosphites as well as addition of furfuryl alcohol or alkylene glycols of 2 to 4 carbon atoms accelerate the hardening (curing) of the resin. Various compounds such as: carboxylic acid amides, urea, dicyandiamide, N-methylolated amides, N-alkyl 2-pyrrolidinones having 1 to 4 carbon atoms in the alkyl group, those having an internal epoxide group, alkanols, and Schiff bases retard the ambient temperature hardening of the resin with the aryl phosphite hardening agents.

Abstract: A composition comprising a halopolymer, such as an ethylene/chlorotrifluoroethylene copolymer, an effective stabilizing amount of an ionomer, and an effective stabilizing amount of a compound such as a phosphite of an organic polyhydric phenol; a thioester; a phosphite; or a hindered phenolic antioxidant. Preferred ionomers are metal salts of ethylene-acrylic acid copolymers, and metal salts of sulfonated polystyrenes. The stabilized halopolymers have improved resistance to thermal degradation and suffer less discoloration when subjected to high melt processing or extrusion molding temperatures.

Abstract: Compounds of the formula I ##STR1## in which x is 1, 2 or 3, and, if x=1, R.sup.1 is C.sub.1 -C.sub.30 alkyl, C.sub.1 -C.sub.18 alkyl substituted by halogen, --COOR.sup.2, --CN, --NR.sup.3 R.sup.4 or by --CONR.sup.3 R.sup.4, C.sub.2 -C.sub.18 alkyl which is interrupted by --NR.sup.5 --, --O-- or --S--, C.sub.3 -C.sub.18 alkenyl, C.sub.5 -C.sub.12 cycloalkyl, phenyl-C.sub.1 -C.sub.4 alkyl, phenyl which is unsubstituted or substituted by C.sub.1 -C.sub.12 alkyl, halogen, phenyl-C.sub.1 -C.sub.4 alkyl and/or C.sub.1 -C.sub.4 alkoxy, or R.sub.1 is naphthyl, a radical of the formula ##STR2## R.sub.2, R.sub.3, R.sub.4 and R.sub.5, independently of one another, are hydrogen, C.sub.1 -C.sub.18 alkyl, C.sub.5 -C.sub.12 cycloalkyl or phenyl-C.sub.1 -C.sub.4 alkyl, R.sup.6 is hydrogen, methyl, allyl or benzyl, R.sup.7 is hydrogen or --OR.sup.9, R.sup.8 is hydrogen or methyl, R.sup.9 is hydrogen or C.sub.1 -C.sub.30 alkyl, R.sup.10 and R.sup.11, independently of one another, are hydrogen or C.sub.1 -C.sub.

Abstract: Compositions containing an aryl phosphite and water to hydrolyze the aryl phosphite provide controlled and extended work time when used as hardening agents for the ambient temperature hardening of phenolic resins and for rapid hardening of such resins at modestly elevated temperatures. Pre-solvolysis with small quantities of water, alkanols of 1 to 4 carbon atoms or alkylene glycols of 2 to 4 carbon atoms improve compatibility of trisubstituted phosphites with the resin. Pre-hydrolysis of the phosphites as well as addition of furfuryl alcohol or alkylene glycols of 2 to 4 carbon atoms accelerate the hardening (curing) of the resin. Various compounds such as: carboxylic acid amides, urea, dicyandiamide, N-methylolated amides, N-alkyl 2-pyrrolidinones having 1 to 4 carbon atoms in the alkyl group, those having an internal epoxide group, alkanols, and Schiff bases retard the ambient temperature hardening of the resin with the aryl phosphite hardening agents.

Abstract: Biphosphites of formula I ##STR1## wherein m is 0, 1 or 2,n is 1 to 4 or 6,R.sub.1 is hydrogen or C.sub.1 -C.sub.4 alkyl and, if m=2, the radicals R.sub.1 are identical or different, and A is the radical of an at least n-hydric alcohol or phenol, which radical is attached to the P atom or atoms through the alcoholic or phenolic O atom or atoms, obtainable by reacting a compound of formula II ##STR2## wherein m is 0, 1 or 2, R.sub.1 is hydrogen or C.sub.1 -C.sub.4 alkyl and, if m=2, the radicals R.sub.1 are identical or different and R.sub.2 ' is phenyl, C.sub.1 -C.sub.12 alkylphenyl or C.sub.1 -C.sub.4 alkyl, with a polyether polyol or polyether/ester polyol, the hydroxy functions of said polyether polyol or polyether/ester polyol being partially or completely esterified with the ##STR3## are suitable for use as stabilizers, especially processing stabilizers, for organic polymers, preferably PVC resins, high density polyethylene and propylene.

Abstract: Recycled mixed plastics from domestic and commercial waste can be stabilized against thermal oxidative degradation by adding a combination of a sterically hindered phenol with a phosphite or phosphonite.

Abstract: Compositions containing aryl phosphites and water to hydrolyze the aryl phosphite provide controlled and extended work time when used as hardening agents for the ambient temperature hardening of phenolic resins and for rapid hardening of such resins at modestly elevated temperatures. Pre-solvolysis with small quantities of water, alkanols of 1 to 4 carbon atoms or alkylene glycols of 2 to 4 carbon atoms improve compatibility of trisubstituted phosphites with the resin. Pre-hydrolysis of the phosphites as well as addition of furfuryl alcohol or alkylene glycols of 2 to 4 carbon atoms accelerate the hardening (curing) of the resin. Various compounds such as: carboxylic acid amides, urea, dicyandiamide, N-methylolated amides, N-alkyl 2-pyrrolidinones having 1 to 4 carbon atoms in the alkyl group, those having an internal epoxide group, alkanols, and Schiff bases retard the ambient temperature hardening of the resin with the aryl phosphite hardening agents.

Abstract: The present invention relates to a novel ethylene/pentene-1 copolymer whose molded film has a good balance between impact resistance and tear properties and high transparency, also is prominently reduced in a variation of the transparency even after subjected to a heat treatment, and further shows high blocking resistance, provided that the copolymer fulfills specific requisites. The invention also relates to a process for the preparation of the above-mentioned ethylene/pentene-1 copolymer and a formulation of the ethylene/pentene-1 copolymer composition using a stabilizer. According to the invention, there can be obtained an ethylene/pentene-1 copolymer composition which is excellent in heat stability in the molding stage, long-term heat stability and weatherability.

Abstract: A process for producing an emulsion graft copolymer, which comprises grafting a vinyl aromatic monomer and a comonomer onto a rubber latex in the presence of an iron (II) redox system as polymerization catalyst and coagulating the graft copolymer latex with an alkaline earth metal compound, characterized in that the pH of the coagulated slurry is adjusted to a value ranging from 8 to 12a) by addition of an alkali metal hydroxide to the obtained slurry after coagulation,b) by addition of an alkali metal hydroxide to the graft copolymer latex before coagulation, orc) by coagulating the graft copolymer latex with an alkaline earth metal hydroxide,with the proviso that the solidified product of the slurry obtained according to a), b) or c) is not washed with acidified water in a subsequent processing step.Graft copolymers are used e.g. for reinforcement of natural rubber, modification of rubber-based adhesives, in fibres, or in films.

Abstract: A flame-retardant thermoplastic resin composition is disclosed, comprising (A) a thermoplastic resin, (B) a halogenated bisphenol type epoxy resin flame-retardant, and (C) an organic phosphite compound. The composition exhibits improved thermal stability to provide molded articles having improved mechanical strength and appearance.

Abstract: The invention relates to the use of an acridans of Structure (I) as a stabilizer, preferably combined with hindered amine, phenolic, and phosphite stabilizers for stabilizing polyether polyols for polyurethane flexible foams and as stabilizers for the polyglycols, heat transfer fluids, lubricating additives.

Abstract: The present invention relates to compostable and biodegradable thermoplastic compositions comprising a thermoplastic polymer, a hydrolytically unstable antioxidant, a pro-oxidant, an accelerator, and a property modifier. The hydrolytically unstable antioxidants effectively prevent the thermoplastic polymer from breakdown by oxidative or thermal degradation under dry conditions. Under wet conditions, the hydrolytically unstable antioxidant becomes ineffective and the thermoplastic polymers breakdown to low molecular weight materials.

Abstract: The present invention provides resin compositions containing thermoplastic resins. Thermoplastic resins employable for the compositions are polyolefin resins, polyester resins, polystyrene resins, polyamide resins and polyphenylene ether resins. The present invention can be particularly effected by using polyamide, particularly, specific aromatic polyamides.In the present invention, the resin compositions can be improved in various chemical and physical properties such as flame-retardance, moldability, color tone, heat stability, mechanical strength by the use of other resin component and stabilizers such as halogenated organic compounds, modified polyolefins, antimony compounds, phosphorus-containing compounds, amine- or phosphorus-type stabilizers.

Abstract: The addition of selected combinations of aliphatic and aromatic phosphite compounds to polyester or copolyester blends with polycarbonate results in unexpected improvements to the properties of resulting molding compositions. The molding compositions comprise:(a) 10-90% by weight of a polyester or a copolyester, comprising:repeat units from at least one aromatic, aliphatic, or alicyclic dicarboxylic acid, wherein the aromatic portion of said aromatic dicarboxylic acid has 6-20 carbon atoms, and wherein the aliphatic or alicyclic portion of said aliphatic or alicyclic dicarboxylic acid has 3-20 carbon atoms, andrepeat units from at least one aliphatic glycol having 2-20 carbon atoms;(b) 90-10% by weight of an aromatic polycarbonate of 4,4-isopropylidenediphenol (bisphenol-A); and(c) 0.1 to about 2% by weight of a combination of aliphatic and aromatic phosphite compounds.

Abstract: A polyolefin resin is stabilized against heat, oxidation and light as well as against discoloration by combustion gas and nitrogen oxide gas by incorporating therein the following two components:(A) a hindered phenolic compound represented by the following formula (I): ##STR1## wherein R is a hydrogen atom or an alkyl of 1 to 3 carbon atoms; and (B) a hindered piperidine compound represented by the following formula (II): ##STR2## wherein n is 2 to 20.

Abstract: Moulding thermoplastic compositions, endowed with improved mould release characteristics, comprising:A) an impact resistant vinyl aromatic copolymer consisting of an ethylenically unsaturated nitrile, a vinyl aromatic monomer and a rubber;B) an engineering polymer; andC) an effective amount of a release agent constituted by a synergistic mixture of an ester of a C.sub.16 -C.sub.18 acid with glycerol and an ester of a saturated aliphatic C.sub.10 -C.sub.20 acid with a C.sub.4 -C.sub.6 aliphatic alcohol.The physical-mechanical properties of the compositions at high moulding temperatures can be improved by addition of an effective amount of a bis(alkyl-phenyl)pentaerythritol diphosphite.The compositions can, furthermore, contain in addition a grafted polymer consisting of an elastomeric core having a Tg lower than 10.degree. C. and containing vinyl monomer chains grafted thereon.

Abstract: A method for preparing tapered block copolymers in a polymerization process by charging an initiator and monomers sequentially with one or more charges of first one of the monomers, then with a mixture of the two monomers, and then with one or more charges of the first monomer to produce a polymodal tapered block copolymer. Suitable monomers include conjugated dienes and monovinylaromatic compounds. The copolymers are particularly useful for applications requiring environmental stress crack resistance.

Abstract: The present invention relates to an aromatic polycarbonate composition which is stabilized by adding to an aromatic polycarbonate (containing substantially no chlorine atom) a very slight amount of at least one compound selected from a phosphorous acid diester and a phosphorous acid monoester and at least one compound selected from a phenolic antioxidant, a phosphorous acid triester and an organic phosphonite. This composition has the characteristics that molded products made therefrom are superior in hot-water resistance and steam resistance and recycling molding thereof causes substantially no coloration. Thus, this composition is high in industrial applicability.

Abstract: A flame-retardant thermotropic polyester composition comprising 100 parts by weight of thermotropic polyester (A) and 0.5 to 60 parts by weight of poly(bromostyrene)(B) having the following structural unit produced from bromostyrene monomer, as the principal structural component thereof, and having a number average molecular weight of 1.times.10.sup.3 to 30.times.10.sup.4 ; ##STR1## has excellent flame retardancy, mechanical properties and heat resistance, and the shaped articles molded from the composition has also superior appearance.

Abstract: Hindered phenol stabilized, stereoregular polymers of branched, higher alpha-olefins can be modified with unsaturated silanes, carboxylic acids, and/or carboxylic acid anhydrides in the presence of a free radical generator in the polymer melt. These polymers can also contain additional additives, such as glass fibers. An aliphatic thio compound is added after the grafting procedure for maximum beneficial effect.