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: Chip adhesives with improved working time comprise a polyetherimide prepared from 2,2-bis[4-(3,4-dicarboxyphenoxy)phenyl]propane dianhydride and bis(4-aminophenyl) sulfone; at least one of silica and conductive metal particles, especially silver particles; and at least one substituted acetophenone as solvent. The preferred substituted acetophenone is 4-methylacetophenone.

Abstract: A blend of ultraviolet screeners which results in excellent screening, but which does not interfere with the optical clarity of polymeric films such as poly(vinyl fluoride).

Abstract: Incorporation of at least one hindered amine light stabilizer ("HALS") compound having a hindered phenol group and a piperidine ring or oxo-piperazinyl ring, provided that each such ring has a hindered amine, at the N.sup.4 position in the ring, that is of tertiary functionality, into polyacetal homopolymer compositions improves the UV stability, and does not significantly degrade the melt processing thermal stability, of said composition.Incorporation of (a) a HALS compound having an s-triazine group, along with a piperidine ring or an oxo-piperazinyl ring, (provided each such ring has a hindered amine at the N.sup.4 position in the ring), and (b) a HALS as described in the preceding paragraph into polyacetal polymer compositions improves the UV stability, and does not significantly degrade the thermal stability of said composition.The composition of the present invention are useful in polyacetal applications where enhanced UV stability is desired.

Abstract: Adhesive composition comprising a blend consisting essentially of (1) an adhesive composition comprising a tacky pressure-sensitive adhesive, said adhesive preferably selected from rubber-based adhesives, e.g., the thermoplastic elastomers, and (2) a pressure-sensitive adhesive composition comprising a polymer having in its backbone at least a major portion by weight of polymerized monomeric acrylic or methacrylic acid ester of a non-tertiary alcohol having from 1 to 14 carbon atoms with the average number of carbon atoms being about 4 to about 12, and grafted to the backbone, polymeric moieties having a Tg greater than about 20.degree. C. and a weight average molecular weight above about 2,000. The pressure-sensitive adhesive of adhesive composition (1) has moieties, e.g., blocks or grafts, that associate with the polymeric moieties grafted to the backbone of the polymer of adhesive composition (2).

Abstract: Aqueous synthetic resin formulations essentially containA) from 3 to 75% by weight of one or more synthetic resins which are composed ofa) from 50 to 99.9% by weight of one or more unsaturated carboxylic or vinyl esters,b) from 0.1 to 12% by weight of one or more .alpha.,.beta.

Abstract: Disclosed are olefin polymers in nonextruded, aspolymerized particle form having a regular, essentially symmetrical geometrical shape, which are stabilized by depositing on their surface a mixture which is either melted, or in which at least stabilizer (A) is in the liquid state, and which comprises the following stabilizers (percent by weight on the polymer):A) from 0.02% to 0.015% of one or more organic phosphites or phosphonites or mixtures thereof, which are liquid at room temperature or have melting point below 100.degree. C.;B) from 0.025% to 0.2% of one or more phenolic antioxidants with melting point from 45.degree. to 130.degree. C.; and, optionally, one or more of the following additional components:C) from 0.05% to 0.5% of one or more thioethers, or organic polysulfides or mixtures thereof;D) from 0.1% to 1.0% of one or more light stabilizers which are liquid at room temperature or have a melting point below 150.degree. C.

Abstract: Polymers comprising carbonyl groups in their backbone, such as polyesters and polyimides, which have been modified by compounds having ketonic groups in their backbone, and molecular weights in the region of 300 to under 1,000. Preferably, these compounds have also ether groups in their backbone.

Abstract: The invention relates to a coating composition suitable for application to plastic surfaces. The coating composition comprises, as essential components, 100 parts by weight of a chlorotrifluoroethylene based copolymer having hydroxyl group as a functional group, a curing agent for the copolymer such as a polyisocyanate, 0.5-30 parts by weight of an acrylic or methacrylic polymer which serves as an adhesion improving component, and an organic solvent. Usually the composition contains an ultraviolet absorber and another light stabilizer. For example, on a polycarbonate article this composition provides a durable coating film without marring the transparency and healthiness of the polycarbonate substrate. By the addition of a pigment the coating is modified into a paint composition which is particularly useful for repairing a bake finished paint film formed by using a polyvinylidene based paint.

Abstract: The present invention relates to filled elastomers which can be cured at low temperatures utilizing a quinoid/peroxide curing system in the presence of a select polar solvent accelerator. The select solvent accelerators which are utilized have the dual function of acting as both dispersing agents and curing accelerators. The instant invention herein includes the instant curing system, its use in a tire sealant composition, the puncture-sealing layer formed of the cured composition and the puncture-sealing tire.

Abstract: A weather-resistantt polyacetal molding composition are comprised of a polyacetal base resin, and a weather-resistance effective amount of a stabilization package which includes (i) a weather stabilizer for the polyacetal base resin, (ii) an acrylic resin, and (iii) an oxyalkylene polymer comprised of repeating oxyalkylene units each having 2 to 8 adjacent carbon atoms.

Abstract: Polymer compositions comprise a polyphenylene ether resin and a plasticizer of the formula ##STR1## wherein X is selected from the group consisting CH.sub.2, O and S; Y is different from X and is selected from the group consisting of CH.sub.2, O, CO, S, SO and SO.sub.2 ; Ar is an aromatic ring; Z.sup.1 and Z.sup.2 are individually selected from the group consisting of alkyl, alkoxide, aryl, aryl oxide, nitrile and nitro groups; R is hydrogen or an alkyl group; m is from 0 to 3; n is from 1 to about 10; and a and b are individually from 0 to 4; provided that both X and Y are not simultaneously oxygen. The compositions may further include a polystyrene resin, for example, a rubber-modified polystryene resin.

Abstract: Weather-resistant polyacetal resin compositions and molded articles formed of the same include a polyacetal base resin, and a weather-resistant effective amount of a weather stabilizing package comprised of (i) a weather stabilizer that is at least one selected from the group consisting of benzotriazoles, benzophenones, aromatic benzoates, cyanoacrylates, oxalanilides and hindered amines (ii) a homopolymer or copolymer of acrylic or methacrylic acid, or ester derivatives thereof, and (iii) a fluororesin.

Abstract: A polyacetal resin composition is improved in the weather-resistance and comprises:(A) a polyacetal resin,(B) 0.01 to 5% by weight (based on the whole composition) of a weathering (light) stabilizer and(C) 0.01 to 10% by weight (based on the whole composition) of an acrylic oligomer of a polyester type.

Abstract: N-hydroxy substituted hindered amine light stabilizers impart outstanding stabilization properties to acid catalyzed thermoset coating compositions with enhanced resistance against the deleterious effects of light, moisture or oxygen in the substantial absence of cure inhibition.

Abstract: Polyacetal compositions containing 0.05 to 5 weight percent of an oxo-piperazinyl-triazine hindered amine light stabilizer wherein the hindered N.sup.4 atom in the piperazinone ring of the stabilizer is alkylated with a metyl, ethyl, or propyl group, said compositions being relatively stable upon exposure to UV light. A polyacetal composition containing a specific oxo-piperazinyl-triazine hindered amine light stabilizer wherein the hindered N.sup.4 atom is not alkylated is shown to be relatively stable upon exposure to UV light. Both compositions possess stability during melt processing and do not significantly lose physical properties upon exposure to heat and light.

Abstract: The invention relates to thermoplastic molding compositions comprising a polycarbonate resin which is rendered resistant to gamma radiation induced yellowing. It was surprisingly found that the incorporation in the resin of an effective amount of benzylic alcohol or its derivatized versions renders the composition resistant to yellowing. The composition of the invention is suitable for the preparation of molded articles having improved resistance to yellowing and to the formation of haze induced upon exposure to gamma radiation.

Abstract: Quickly crystallizing polyester compositions containing as nucleating agent a compound having the formula: ##STR1## wherein: Me is an alkali metal or alkaline-earth metal;X is a group selected from --CH.sub.2 --, --CO--, --CH.sub.2 --CO--, and --CH(CH.sub.3)--CO);p is 0 or 1;Ar is a single or condensed aromatic ring, or Ar represents 2 or more aromatic nuclei linked either by a simple bond or by an --O--, --S--, --SO.sub.2 --, --SO--, --CO--, --CS--, or --NH-- group;R, R.sub.1, R.sub.2 may be, independently of each other, H, a linear or branched C.sub.1 -C.sub.6 alkyl radical, optionally substituted with halogen atoms or C.sub.1 -C.sub.6 alkoxy groups;Y is H or --CH.sub.3 ;m is 1 when Y is --CH.sub.3, or a number from 1 to 5 when Y.dbd.H;n is a number from 1 to 500; andZ is --H, a C.sub.1 -C.sub.18 alkyl, benzyl, allyl, glycidyl, acetyl, --CO--NH--R.sub.3 or --CO--NH--R.sub.4 --NCO group.

Abstract: Efflorescence phenomena on mineral substrates are prevented by coating the surface of the mineral substrates with aqueous polyacrylate dispersions and drying the coating, if necessary at elevated temperatures, by a process in which a mixture of(A) a dispersion of a copolymer of(a) (meth)acrylates of alkanols which are of 3 to 20 carbon atoms and have a tertiary CH group,(b) styrene, .alpha.-methylstyrene, methyl methacrylate, tert-butyl (meth)acrylate and/or (meth)acrylonitrile and(c) mono- and/or dicarboxylic acids of 3 to 5 carbon atoms and/or or their amides which may be substituted at the N atom by alkyl, and(B) an aromatic ketoneis used for the coating, and the coating is exposed to ultraviolet light.

Abstract: A composition for injection molding a ceramic powder to make ceramic shapes is described. The composition comprises a ceramic powder and a binder system. The binder system comprises a distilled thermosetting polycarbosilane containing from about 0.4 to about 0.7 weight percent of a cross-linking inhibitor, a surfactant, and with or without a lubricant. The cross-linking inhibitor is selected from the group consisting of p-benzoquinone, benzophenone, and mixtures thereof.

Abstract: The invention relates to polyolefines stabilized against damage caused by light and containing(A) at least one polyalkylpiperidine light stabilizer,(B) an organic salt of zinc or magnesium and(C) either(C.sub.1) a UV absorber or(C.sub.2) a pigment or(C.sub.3) a UV absorber and a pigment.

Abstract: Described herein are tough solvent resistant materials from a crystallizable, crosslinkable resin mixture comprising a particular polyarylether and a crystallization promoting plasticizer, and reinforced composites made from such resin mixture.

Abstract: A thermoplastic composition is provided which comprises a polyimide with an effective amount of an alpha-hydroxyketone such as benzoin to prevent discoloration on thermal processing.

Abstract: A thermoplastic composition is provided which comprises an aromatic polysulfone with an effective amount of an alpha-hydroxyketone such as benzoin to prevent discoloration on thermal processing.

Abstract: Room temperature-curable organopolysiloxane compositions are made from essentially linear organopolysiloxanes having hydroxyl or hydrolyzable end groups, a crosslinking agent, a filler, optionally a curing catalyst, an unsaturated ester having at least ten carbon atoms in the unsaturated fatty acid component of the ester, and a photosensitizer. These compositions cure to elastomeric materials which do not soil on the surface or the surrounding areas of the substrate in contact with the cure product. The adhesion of these cured products is not reduced.

Abstract: There are provided novel modified polyphenylene ether-polyamide compositions comprising polyphenylene ether, polyamide and a quinone compound for improved strength.

Abstract: Thermoplastic moulding compounds containing an ABS plastics and optionally other plastics are stabilized with a benzoin derivative corresponding to the following general formula: ##STR1## wherein R represent, independently of one another, hydrogen, C.sub.1 -C.sub.6 alkyl or halogen; used in quantities of from 0.05 to 2%, by weight, based on the plastics.

Abstract: A method for producing foam polyolefin products which are light-stable and weather-resistant are obtained by the combined use of the following stabilizers:(a) phenolic antioxidants,(b) substituted benzophenones and/or substituted benzotriazoles, and(c) sterically hindered amines.

Abstract: A curable resin composition comprising a cured matrix-forming component and an ultraviolet absorber, characterized in that said ultraviolet absorber comprises a benzophenone derivative represented by the formula: ##STR1## where each of X and X' is a hydrogen atom or a hydroxyl group, provided that at least one of X and X' is a hydroxyl group, each of Y and Y' is a hydrogen, a hydroxyl group, --OROH or --OR', provided that at least one of Y and Y' is --OROH, where R is an alkylene group and R' is a monovalent organic group, and said cured matrix-forming component is reactive with a hydroxyl group.

Abstract: Electrical conductors can be coated with a cured, thermosetting powder coating which, in its uncured state comprises a saturated, carboxyl group-containing polyester resin, an epoxy resin, an acrylic resin and, optionally, a cure catalyst, benzoin and/or a polyamide resin to provide insulative coatings with reduced air entrapment and improved dielectric strength.

Abstract: A coating composition which cures at ambient temperatures of 20-80% by weight of a binder and 80-20% by weight of a solvent for the binder, the binder contains about:A. 60-80% by weight, based on the weight of the binder, of an acrylic polymer of polymerized monomers of methyl methacrylate and an alkyl methacrylate, an alkyl acrylate or mixtures thereof, each having 2-12 carbon atoms in the alkyl group and the polymer has pendent amino ester or hydroxy amino ester groups;B. 20-40% by weight, based on the weight of the binder, of a glycidyl acrylic crosslinking polymer of polymerized monomers of glycidyl methacrylate or glycidyl acrylate and an alkyl methacrylate, alkyl acrylate or mixtures thereof, each having 2-12 carbon atoms in the alkyl group.The composition is useful as an exterior finish for automobiles and trucks and for repairing finishes of automobiles and trucks.

Abstract: An olefinic polymer composition is provided which comprises an olefinic polymer selected from homopolymers and copolymers made from aliphatic, ethylenically unsaturated monomers containing from 2 to about 10 carbon atoms; from about 100 to about 3,000 parts per million based on the weight of the total composition of a hindered phenolic stabilizer; and from about 100 to about 10,000 ppm based on the weight of the composition of a stabilizer selected from compounds of the formula: ##STR1## wherein M is 0 or 1; R.sub.1 and R.sub.2 are each independently selected from hydrogen or an alkyl group containing from 1 to about 20 carbon atoms.

Abstract: Improved polyimide and/or polyamide-imide coating compositions are provided for use as magnet wire coatings which comprise a polyimide and/or polyamide-imide polymer and a co-solvent mixture of N-methyl pyrrolidone and acetophenone the solids content of the solution being between about 5 percent and 40 percent by weight based on the total weight of solution.

Abstract: Polyethylene terephthalate resin compositions are provided containing fillers; reinforcing agents; or blends of such fillers and agents; alkali metal silicates, carbonates, or bicarbonates; and neopentylglycol dibenzoate.Articles molded from these compositions have high gloss surfaces and heat deflection temperatures when molded at temperatures below 110.degree. C. even without a precompounding drying stage.Surprisingly, the inclusion of neopentylglycol dibenzoate allows the concentration of alkali metal silicate, carbonate, or bicarbonate to be substantially reduced while retaining the high gloss surfaces seen when alkali metal silicates, carbonates, or bicarbonates are used alone at much higher concentrations.

Abstract: A polyamide acid composition for preparing a polyimide which can extend the pot life of the composition comprising a solution of a polyamide acid in an organic solvent, the polyamide acid being a precursor of the polyimide, a dehydrating agent, a catalyst and a pot life extending agent which can lower a rate of conversion of the polyamide acid to the polyimide, and the process for preparing the polyimide from said polyamide acid composition. According to the present invention the pot life can be extremely extended to give the composition an enough flowability for a long time without reducing the excellent properties such as a heat resistance and an electric insulation of the obtained polyimide.

Abstract: An improved molding composition is provided which exhibits desirable weathering resistance and UV stability comprising an oxymethylene copolymer having at least one chain containing from about 85 to 99.6 mole percent of oxymethylene units interspersed with about 0.4 to 15 mole percent of oxyethylene units, about 0.1 to 1 percent by weight of 1,6-hexamethylene bis-(3,5-di-tert-butyl)-4 hydroxy hydrocinnamate, about 0.015 to 0.4 percent by weight of 2,4,6-triamino-symtriazine, about 0.1 to 0.75 percent by weight of bis(1,2,2,6,6-pentamethyl-4-piperidinyl) ((3,5-bis(1,1-dimethylethyl-4-hydroxyphenol)methyl)) butyl propanedioate and about 0.25 to 1.0 percent by weight of 2-hydroxy-4-n-octoxy-benzophenone.

Abstract: The incorporation of a metal oxide into a specific ethylene polymer-based molding composition reduces or eliminates the formation of bubbles during molding.

Abstract: Polyethylene terephthalate resin compositions are provided containing fillers; reinforcing agents; or blends of such fillers and agents and selected alkali metal salts having anions which are oxides of Group IV of the periodic table preferably carbonates and bicarbonates.Articles molded from these compositions have high gloss surfaces and heat deflection temperatures when molded at temperatures below 110.degree. C. even without a precompounding drying stage.

Abstract: Disclosed is a method for sizing paper wherein the sizing agent employed is a hydrophobic cellulose reactive sizing agent such as a ketene dimer sizing agent. There is employed in combination with the sizing agent a novel sizing accelerator. Disclosed also is a novel sizing composition comprised of the sizing agent and the accelerator, the accelerator being a water-soluble nitrogen-containing reaction product of (1) a water-soluble polyaminopolyamide, such as that derived by reaction of adipic acid and diethylene-triamine; (2) an epihalohydrin, such as epichlorohydrin; and (3) a composition comprising, by weight, from about 20% to about 65% bis(hexamethylene)triamine, said composition being the residue obtained after recovery of hexamethylenediamine from its manufacture by hydrogenation of adiponitrile.

Abstract: A heat-stable, polymer-forming composition of a polymerizable material, a transition metal compound, a polymer chain terminator, and, optionally, a preventive antioxidant is disclosed as well as particular uses of such composition.

Abstract: A crater resistant enamel coating composition used for the exterior of trucks and automobiles in which the binder is a blend of(A) an acrylic polymer having hydroxy groups and contains about 0.1-10% by weight of a polymerized perfluoro carbon constituent of the formula ##STR1## where R is H or CH.sub.3, R.sup.1 is alkyl, R.sup.2 is perfluoro alkyl and n is 0 or 1 and(B) an aminoplast crosslinking agent such as an alkylated melamine formaldehyde resin.After the composition is applied and baked by conventional techniques, a finish is formed that has an excellent appearance.

Abstract: A bumper having excellent rigidity, resistance to thermal deformation and to mechanical impact at a low temperature and superior lacquer-bonding property is made from a propylene polymer composition comprising:(A) 55 to 65% by weight of at least one crystalline ethylene-propylene block copolymer in which the content of the polymerized ethylene is in the range of from 5 to 10% by weight, in which the polypropylene component has a fraction thereof insoluble in boiling n-heptane, in an amount of 97% or more, in which a fraction thereof soluble in p-xylene at room temperature, has an intrinsic viscosity of from 3 to 4 determined in decahydronaphthalene at a temperature of 135.degree. C. and which has a melt flow index of from 2 to 10;(B) 30 to 35% by weight of at least one amorphous ethylene-propylene copolymer having an intrinsic viscosity of from 2.0 to 3.5 determined in decahydronaphthalene at a temperature of 135.degree. C., and a Mooney viscosity ML.sub.

Abstract: Normally intractable polymers of the structure: ##STR1## wherein X is O or NH, provided at least one X is O, such as poly(parabanic acids) are made extrudable by composition with from 10 to 60 weight percent of diaryl ketone.

Abstract: Use of a selected alkali metal salt of a polycarboxylic acid has been found to impart good crystallization and mold release properties to polyethylene terephthalate molding blends.

Abstract: Certain 3-alkylhydroxybenzophenone derivatives, such as 2,4-dihydroxy-3-methylbenzophenone have been found to be superior as UV stabilizers for a variety of organic polymeric substrates. Coating compositions of such stabilizers in organic resins, for example, melamine can be used to protect such polymeric substrates from the effects of exposure to UV radiation.

Abstract: Use of a selected antimonate has been found to increase flame-retardancy without lowering thermal resistivity of a polyurethane terephthalate molding blend which contains an ionic hydrocarbon copolymer or ionic salt of a hydrocarbon acid and a low molecular weight compound.