Abstract: Flame retardant MPPE compositions incorporate an effective amount of a polybrominated higher alkylbenzene or mixture thereof as a flame retardant and flow modifier together with an enhancing agent.

Abstract: Flame retardant ABS compositions incorporate an effective amount of a polybrominated higher alkylbenzene or mixture thereof and an enhancing agent.

Abstract: A method of reducing the number of free carboxyl end groups present in a fiber-forming polymer is given whereby to the polymer minor amounts of a low-boiling oxirane compound such as ethylene oxide are added.

Abstract: A novel polyester is provided which has been found to exhibit an anisotropic melt phase at a temperature which enables it readily to undergo melt processing to form quality fibers, molded articles, etc. The polyester of the present invention includes as essential ingredients moieties derived from para-hydroxy benzoic acid, 2,6-naphthalene dicarboxylic acid, terephthalic acid, and methylhydroquinone in the proportions indicated. In a preferred embodiment the polyester is capable of undergoing melt processing at a temperature below approximately 320.degree. C., and in a particularly preferred embodiment at a temperature below approximately 300.degree. C. (e.g., with standard equipment commonly used to melt process polyethylene terephthalate). Fibers conveniently can be melt spun from the polyester of the present invention which exhibit tenacity values which are enchanced upon thermal treatment.

Abstract: A novel polyester is provided which has been found to exhibit an anisotropic melt phase at a temperature which enables it readily to undergo melt processing to form quality fibers, molded articles, etc. The polyester of the present invention is different in character than polyesters of the prior art and includes as essential ingredients moieties derived from para-hydroxy benzoic acid, 1,2-bis(para-carboxy phenoxy)ethane, terephthalic acid, and unsubstituted hydroquinone in the proportions indicated. The polyester of the present invention can be produced on a relatively economical basis and has been found capable of yielding an anisotropic melt of relatively low viscosity at a desirable temperature for melt processing. In a preferred embodiment the polyester is capable of undergoing melt processing at a temperature below approximately 300.degree. C., and in a particularly preferred embodiment at a temperature below approximately 290.degree. C. (e.g.