Abstract: The disclosure is concerned with a maleimide-diamine resin composition which is well soluble to a low boiling point solvent and is excellent in heat resistance. The composition is featured by containing a maleimide-diamine adduct having the general formula: ##STR1## wherein A is a mono-, di-, tri- or tetravalent organic group containing at least two carbon atoms, R.sub.1 through R.sub.6 are hydrogen atom, a lower alkyl group, a lower alkoxy group, chlorine atom, bromine atom, trifluoromethyl group, or trichloromethyl group, and m is an integer of 0-4.

Abstract: Poly-2-pyrrolidone polymer and compositions having improved thermal stability via the capping of at least a portion of the amino and/or carboxy end group of the polymer and processes for preparing such polymers and compositions. The processes are characterized by the reaction of the polymer with alkanolamines and/or alkyl polyamines. The products afford improved melt processability.

Abstract: Lubricant compositions comprising .alpha.-olefin/maleinimide copolymers is disclosed. Also disclosed is a process for the shaping of thermoplastic synthetic resins utilizing .alpha.-olefin/maleinimide copolymers.

Abstract: New transparent polyamides consisting of recurring structural elements of formula I ##STR1## wherein the carbonyl groups are linked to the benzene ring in 1,3- and/or 1,4-position are described. The novel polyamides are suitable for the manufacture of transparent shaped articles, and are distinguished by good thermoplastic processing characteristics, low water absorption, high stability to hydrolysis and good dimensional stability under the action of moisture.

Abstract: A process for preparing a polyamide is provided. The polyamide is prepared by effecting direct polycondensation reaction of a dicarboxylic acid component containing at least 80 mole % of adipic acid and a diamine component containing at least 70 mole % of m-xylylene diamine under an atmosphere of an inert gas and at atmospheric pressure at a controlled temperature which is higher than the melting point of the dicarboxylic acid component and which can maintain the reaction mixture in a uniformly-fluidized state throughout the reaction.

Abstract: A process for rapidly and substantially decreasing the melt index and increasing the viscosity of polymers of caprolactams during melt processing by forming a molten mixture of the polymer and a phosphite compound and heating the mixture until the desired change in melt index and viscosity are obtained.

Abstract: A heat resistant resin produced by reacting (A) a polyamideimide resin with (B) an alcohol component and (C) an acid component with heating is soluble in a cresol type solvent and gives coatings excellent in heat resistance, thermal shock resistance, wear resistance, resistance to hydrolysis, etc., suitable for enamelled wire.

Abstract: A process for producing an anionic copolymer containing urethane and carboxylic acid ester moieties with or without carbonate moieties, carbonamide moieties, or both carbonate and carbonamide moieties, having weight average molecular weights from 1,000 to 150,000, determined by light diffusion method, which comprises heating an anhydrous mixture of 20 to 80% by weight of lactam and 80 to 20% by weight of a cyclic carbonate at temperatures between 100.degree. and 250.degree. C. in the presence of 0.001 to 1% by weight, based on the quantity of monomers, of an alkaline catalyst and copolymers produced thereby which are useful as adhesives, plasticizers and lacquers.

Abstract: Aromatic polycarbonates end-capped with branched alkyl acyl halides and/or acids from four to seven carbon atoms, inclusive, provide higher heat resistance and better impact resistance after aging at elevated temperature compared with normal alkyl acyl agents. The resins of the invention are injection molded.

Abstract: The compounds are of the class of aromatic polyamides useful as matrix resins in the manufacture of composites or laminate fabrication. The process for preparing this thermoplastic-thermoset polyamide system involves incorporating a latent crosslinking moiety along the backbone of the polyamide to improve the temperature range of fabrication thereof wherein the resin softens at a relatively low temperature (.congruent.154.degree. C.) and subsequently "sets-up" or undergoes crosslinking when subjected to higher temperature (.congruent.280.degree. C.).

Abstract: This invention provides a single stage melt polymerization process for the production of an improved type of high molecular weight polybenzimidazole, which involves the use of an organosilicon halide polymerization catalyst.The process provides poly-2,2'-(m-phenylene)-5,5'-bibenzimidazole of improved color and Plugging Value, and is further characterized by an Inherent Viscosity of at least about 0.7 dl/g, and a weight average molecular weight of at least about 100,000.

Abstract: Improved Portland cement compositions and their use in cement coating operations is disclosed wherein acrylic polymers modified by critical amounts of propylene glycol, a coloring ingredient and a defoaming agent such as dimethyl polysiloxane are used as additives substantially increasing the flexibility, abrasion and heat resistance and shear bond characteristics of Portland cement and sand mixtures used in coating compositions for concrete, wood, pressed boards and the like.

Abstract: Flame retardant polycarbonate and copolyestercarbonate compositions, and articles made therefrom, are disclosed which are obtained from polymers derived from non-polycyclic, sulfur-free diphenols and polymers derived from sulfur-containing diphenols.

Abstract: Low density conductive carbon black agglomerated particles are finely divided to a particle size below 0.044 millimeter and added in a portionwise manner to a PVC resin in a closed system. The process ensures a uniform dispersion of the carbon black into the PVC resin and uniform bulk and surface properties of articles molded from the resultant resin.

Abstract: A method for delaying curing rate of a curable resin composition comprising a polyfunctional cyanate ester compound or mixture of a polyfunctional cyanate ester compound and a polyfunctional maleimide compound, characterized in that a specific benzene sulfonic acid is added to said composition is disclosed.

Abstract: Polyamides containing as much as 50 mole percent nylon-3 units in at least a partially alternating system and exhibiting high glass transition temperatures (Tg) can be prepared from N,N'-terephthaloyldi-beta-alanine and a diamine, such as bis(p-aminocyclohexyl)methane. Properties of such polyamides can be controlled by choice of the diamine and the preparation temperature without loss of the high Tg. The polyamides of this invention exhibit utility in comfort fiber applications.

Abstract: Novel Poly[N,N'-(alkyl or aryl)-bis(4,4'-phthalimido)-1,3,4-oxadiazole-2,5-diyls], compositions for fibers, films, coatings and molded objects featuring high strength and high thermal properties with formulation advantages.

Abstract: Shaped articles composed of polymers formed from residues which are not melt processable characterized in that the shaped article has been formed from a readily processable melt of a copolymer containing said residues together with in-chain temperature labile residues and has been subsequently heated to remove the labile constituents with recombination of the resultant polymeric residues. Preferably the processable melt should be in the form of an anisotropic melt so that the shaped article may be in oriented form prior to removal of the residues. Typically the shaped articles are articles of thin section composed of p-hydroxybenzoic acid residues.

Abstract: An improved process for the continuous preparation of polycaprolactam, in which .epsilon.-caprolactam is partially polymerized, with the addition of a water-containing agent and acetic acid or propionic acid as a chain regulator, at a nylon-forming temperature, in a mechanically mixed zone in a vertical tubular reactor through which the reaction mixture flows downwards, and is then polymerized further, in additional heat exchange zones, until the desired degree of polymerization is reached, and polycaprolactam is then discharged as a melt, wherein a gaseous mixture of caprolactam, water and acetic acid or propionic acid is removed at the top of the tubular reactor and is fed to the middle of a column, water is removed at the top of the column, the bottom of the column is maintained at from 125.degree. to 145.degree. C., and the mixture obtained at the bottom of the column, and comprising caprolactam, acetic acid or propionic acid and a small amount of water, is recycled to the top of the tubular reactor.

Abstract: New transparent polyamides consisting of recurring structural elements of formula I or II ##STR1## in which the carbonyl groups are linked to the benzene ring in 1,3- and/or 1,4-position are described. The novel polyamides are suitable for the manufacture of transparent shaped articles, and are distinguished by good thermoplastic processing characteristics, low water absorption, high stability to hydrolysis and good dimensional stability under the action of moisture.