Abstract: Compounds of the formula Ia or Ib ##STR1## in which R.sub.1 and R.sub.2, independently of one another, are hydrogen, alkyl, cycloalkyl, alkenyl, aryl or aralkyl or, together with the carbon atoms in the .alpha.-position to the carbonyl groups, form a cyclopentane, cyclopentene, cyclohexane, cyclohexene, cyclohexadiene or bicyclo[2.2.1]hept-5-ene ring which is unsubstituted or substituted by C.sub.1 -C.sub.4 alkyl, or form a monocyclic or polycyclic, aromatic ring system which is unsubstituted or substituted by C.sub.1 -C.sub.4 alkyl, R.sub.3 and R.sub.4, independently of one another, are hydrogen, alkyl, alkenyl, aryl or aralkyl, and R.sub.5 and R.sub.6, independently of one another, are alkyl, aryl or aralkyl groups, are highly suitable as flame retardants for polymers.

Abstract: The subject of the invention is flameproofed, non-dripping polyamide moulding compounds which contain specific amounts of the following:A) Phosphinic acid esters of polyphenols based on phenolaldehyde/ketone condensates,B) Anti-dripping agents (such as polyfluoroethylene polymers or aramides),C) Zinc borate,D) Thermoplastics with a predominantly aromatic main chain and a high thermal deflection temperature (Vicat B.gtoreq.180.degree. C.),and, if applicable, reinforcing agents and other additives for flameproofing and processing.

Abstract: This invention provides a mold release composition copmrising (1) a compound or a polymer having at least one of perfluoroalkyl groups having 4 to 20 carbon atoms and perfluoroalkenyl groups having 4 to 20 carbon atoms, and (2) a ladder polymer of organosilsesquioxane.

Abstract: Described herein are novel heat-stabilized poly(aryl ether ketone) compositions. Stability is imparted by blending a poly(aryl ether ketone) with an aromatic phosphorus compound and an organic acid having a dissociation constant within a well-defined range.

Abstract: Certain hydroxy alkanoate polymers, such as 3-hydroxybutyrate polymers, when obtained by solvent extraction from fermentation masses, can have long cycle times during thermal processing due to a low rate of crystallization. A combination of (a) an organophosphonic or organophosphoric acid or ester with (b) an oxide, hydroxide, or carboxylate of a metal of Groups I to V is an effective nucleating agent.

Abstract: Flame-resistant molding compounds of polycarbonate, polyalkylene terephthalate, graft polymer, fluorinated polyolefine and phosphorus compound can be worked up into moulded products which have a particularly advantageous combination of joint line strength, dimensional stability under heat and toughness.

Abstract: A filled polyolefin, particularly polypropylene, containing a sterically hindered phenol antioxidant and a compound of formula I and/or II ##STR1## in which R is unsubstituted phenyl or phenyl substituted by 1 or 2 C.sub.1-12 alkyl groupsn is 0 or 1 andA is a monofunctional or difunctional residue of a phenyl, diphenyl, diphenyl ether, diphenylmethane or dibenzofuran,as processing stabilizer has good long-term stability even in the absence of conventional sulphur-containing co-stabilizers.

Abstract: A process for producing a polyamide with a relative viscosity of at least 100 is disclosed. The process comprises adding a catalyst selected from the group consisting of ortho-phosphoric acid, meta-phosphoric acid, alkali-metal hypophosphite and phenylphosphinic acid to the polyamide, which has a relative viscosity of from 30 to 70, mixing the catalyst and polyamide at a temperature above the melting temperature of the polyamide under reduced pressure and for a time sufficient to increase the relative viscosity of the polyamide to at least 100, and extruding the resulting polyamide into shaped form and quenching said polyamide. The catalyst is present in amounts of at least 0.01 wt. % and increases in relative viscosity may develop in times as short as about one minute.

Abstract: Coherent thermoplastic aggregates with very high content of pulverized mineral materials, composed of the said materials, of polyolefin polymers and/or copolymers, and possibly also of various familiar adjuvants, characterized by the fact that, in order for them to have both a volumetric mass close to or at most equal to the theoretical volumetric mass of the pulverized mineral substances entering into their composition and an excellent compatibility with redispersion polymers, the polymers and/or copolymers entering into the composition of the said aggregates in presence of a fluidizing agent are chosen within the group of thermoplastics with melting and/or softening point at least equal to 60.degree. C. and index of fluidity at least 50 (measured according to the standard ASTM D 1238) of the polyolefin type, other than those containing a polar monomer.

Abstract: Conductive structures in polymers are obtained by a method in which poly(organylheteroacetylenes) of formula I ##STR1## or a mixture of poly(organylheteroacetylenes) of formula I and other polymers are exposed to radiation of high energy density, preferably laser radiation. At relatively low temperatures of 100.degree. C. to 600.degree. C., the polymer structure is effected so that electrically conductive structures result. The products are employed in electrical engineering, electronics and microelectronics, preferably as printed conductors. The invention makes it possible to inscribe long-term stable, conductive structures in an insulating polymer matrix in a one-step method, it being possible to use modern computer techniques (computer graphics)and to produce computer-aided conductor structures directly. The polymers can be used without supports or applied on rigid or flexible materials.

Abstract: Blends of a silicone-polycarbonate block copolymer with a compatibilized alloy of polyphenylene ether and polyester resins comprise a class of thermoplastic materials with physical properties ranging from those of a self-extinquishing, tough thermoplastic elastomer to a rigid engineering material. The compatibilizers include aromatic polycarbonates and rubber-modified impact modifiers.

Abstract: A solid mixture contains as essential components(A) from 40 to 99% by weight, based on the total weight of (A) and (B), of a nonnucleating thermoplastic polyamide and(B) from 1 to 60% by weight, based on the total weight of (A) and (B), of a thermoplastic polyamide which contains a nucleating agent, and in addition(C) from 0 to 60% by weight, based on the total weight of (A)+(B)+(C), of fibrous or particulate fillers.

Abstract: An ignition resistant carbonate polymer composition comprising a mixture of one or more carbonate polymers, and a high elastic memory polytetrafluoroethylene having a heat shrinkage equal to or greater than 15% with or without one or more organo phosphorous compounds.

Abstract: Stabilizers for organic polymers, consisting of one or more phosphorus-containing compounds of the family of alkyl- and/or phenyl-phosphites, alkyl- and/or phenyl-phosphonites, alkyl- and/or phenyl-diphosphonites, are directly added to the reaction mixture during the (co)polymerization of .alpha.-olefins or of mixtures thereof with other unsaturated monomers.The so-obtained polymeric compositions result perfectly stabilized, and show a thermo-oxidative resistance higher than that of the same polymeric compositions to which the same antioxidants have been added by a traditional route.

Abstract: The present invention provides thermoplastic flame-retardant moulding compositions containing halogen-containing copolycarbonates, styrene/maleic anhydride copolymers, phosphorus compounds of the formula (I) ##STR1## and tetrafluoroethylene polymers and, if desired, further known additives.

Abstract: Carbonate polymer compositions exhibit good thermal stability and good non-yellowing characteristics. Compositions comprise a carbonate polymer (e.g., a homopolycarbonate of bisphenol A), a heat stabilizing phosphorous compound (e.g., an organo-phosphite or an organo-phosphonite), an epoxy compound containing internal acyclic ether linkages (e.g., a diglycidyl ether of a polypropylene glycol), and optionally a hindered phenol. Such compositions retain desirable properties upon exposure to hot and humid conditions.

Abstract: A method for improving a production characteristic of flame-retardant polyurethanes. The characteristic may be selected from the group consisting of(1) processability;(2) scorch;(3) odor; and(4) flame-retardant efficiency.The method comprises incorporation into a polyurethane an amount effective to reduce combustibility of a haloether phosphorate flame-retardant under conditions sufficient to improve said characteristic. Also, the flame-retardant polyurethane composition such as prepared by said method. Preferably, the polyurethane is a foam, especially a flexible foam and most especially flexible slabstock foam.

Abstract: The invention relates to an adhesive stick of an adhesive resin dissolved and/or dispersed in an aqueous solvent system and containing a gel-forming component and, if desired, other standard additives. The new adhesive stick is characterized in that its adhesive layers applied by rubbing onto a receiving surface show permanently tacky pressure-sensitive adhesive properties and in that the stick contains the reaction product of sorbitol and/or xylitol and benzaldehyde as the gel-forming component and, as adhesive resin, a reaction mixture from the reaction of methyl vinyl ether/maleic acid anhydride copolymers with partially neutralized acid phosphate esters of nonionic wetting agents of the lower alkylene oxide adduct type.

Abstract: A polyester resin composition having excellent molding mobility and crystallizing property, comprises (A) at least one thermoplastic polyester resin selected from polyethylene terephthalate resins and polybutylene terephthalate resins; (B) a polycaprolactone having a number average molecular weight of from 200 to 2,000 in an amount of 0.1 to 30 parts by weight per 100 parts by weight of the polyester resin, in which polycaprolactone molecules, at least 50% of the terminal radicals thereof, are modified to be non-reactive, (C) 0.01 to 10 parts by weight of a crystal nucleating agent per 100 parts of the polyester resin, and optionally, (D) at least one additive selected from fillers and specific phosphorous compounds which may be in combination with a specific epoxy compound, the polyester resin composition being useful for producing a molded product having an excellent dimensional stability and mechanical strength.

Abstract: Ortho-alkylated phenyl phosphonites of the formula ##STR1## wherein R.sup.1 is alkyl, phenyl or phenyl substituted by alkyl, R.sup.2 is tertiary alkyl or phenylalkyl, and R.sup.3 is hydrogen, alkyl or phenylalkyl are useful as stabilizers for organic polymers and lubricating oils, particularly as processing stabilizers for polyolefins.

Abstract: This invention is directed to a polymeric thermo-sensitive material which comprises a polyamide composition containing compounds of sulphur-contained compounds or phosphorous acid ester, and which is smaller in polarization in the application of direct-current electric field, higher in temperature detection function, does not cause flexibility deterioration due to heating operation and is less in hygroscopicity. A composition containing thiophosphorous acid ester and bis(hydroxyphenyl) sulfide derivative from a group of the phosphorous acid ester is particularly superior in quality.

Abstract: Polycarbonates are heat stabilized by the incorporation of a carbonate compound having a boiling point greater than about 250.degree. C. and an organophosphorous compound such as a phosphonite or a phosphite. The amount of the additive compound used in each instance is from 100 to 10,000 parts per million.

Abstract: A composition comprising (a) an aromatic polycarbonate and (b) a minor amount of a oxyalkylene siloxane block copolymer, and, optionally, an organic phosphite or phosphonite and/or epoxy compound provide lower viscosity in the melt without producing brittle molded parts.