Abstract: This invention relates to a composite ring or segment of a ring, having use as a shroud of an airplane engine, comprising about 20 to about 70 weight percent of the thermoplastic polymer and about 30 to about 80 weight percent of the carbon fiber, and having a heat deflection temperature of at least 230° C. at 1.8 MPa as determined according to ASTM D648, and which provides thermal stability and wear resistance.

Abstract: Thermoplastic compositions containing certain salts of fluorinated sulfonic acids adhere especially well to coatings (paints) applied to the surface(s) of that composition. Useful parts that can be made include painted automotive body parts, appliance cases, and other parts with painted aesthetically pleasing surfaces.

Abstract: Toughened poly(ethylene terephthalate) compositions which contain functionalized polymeric tougheners, and wherein the poly(ethylene terephthalate) contains little or no antimony, have superior heat stability and retain their toughness for longer periods at higher temperatures. The compositions are useful for molded and shaped parts, such as mechanical parts, automotive parts and electrical parts.

Abstract: Disclosed is a process for the purification of aromatic dicarboxylic acids in which the salt of an aliphatic diamine and an aromatic dicarboxylic acid is formed in an aqueous solvent, recrystallized, and contacted with an aliphatic dicarboxylic acid in an aqueous solvent such that the aromatic dicarboxylic acid is recoverable in the form of a purified precipitate. The remaining aqueous solute is a salt of the aliphatic diamine and aliphatic dicarboxylic acid and can be used as a starting material in the manufacture of certain polyamides (nylons). The invention is particularly applicable for purifying 2,6-naphthalene dicarboxylic acid, which is difficult otherwise to purify.

Abstract: This invention relates to thermotropic liquid crystalline polyester compositions containing recurring units derived from hydroquinone, 4,4'-dihydroxybiphenyl, terephthalic acid, 2,6-naphthalenedicarboxylic acid, 4,4'-bibenzoic acid, and 4-hydroxybenzoic acid which are characterized as having melting points less than 365.degree. C., breaking elongations greater than or equal to 1.5%, and heat distortion temperatures greater than 200.degree. C.This invention further relates to the same compositions containing 20 to 40 weight percent of at least one glass reinforcing/filling agent and which are characterized as having melting points less than 365.degree. C., breaking elongations greater than or equal to 1.8%, and heat distortion temperatures greater than 230.degree. C.The compositions are useful as films, fibers, and shaped or molded articles.