Abstract: A novel polyester resin is provided which exhibits an anisotropic melt phase. The polymer comprises recurring 4-oxybenzoyl units, 6-oxy-2-naphthoyl units, aromatic dicarboxy units, and aromatic diol units as described in appropriate concentrations. The resulting polyester exhibits excellent melt processability in combination with good mechanical properties and a good retention of properties at elevated temperatures.

Abstract: A resin composition being useful for coating on electrically conductive lines comprises (A) a halogen-containing polyester having a halogen content of 0.5 to 30 wt. % and being a polycondensation product of (a), (b) and (c) wherein(a) is a component composed mainly of an aromatic dicarboxylic acid or an ester forming derivative thereof,(b) is a component composed mainly of an aliphatic glycol or an ester forming derivative thereof, and(c) is a component composed of an ester forming compound containing a halogen and 0.1 to 10 wt. %, based on the total composition, of (B) at least one carbodiimide compound.

Abstract: A thermoplastic resin composition comprises a resin dispersion which includes a thermoplastic resin component having a solubility parameter .delta. of at least 9.5 cal.sup.1/2 cm.sup.-3/2, a modifier component having a solubility parameter .delta. of not higher than 8.5 cal.sup.1/2 cm.sup.-3/2, and a dispersibility improver comprising a silicon-containing polyacetal copolymer having (i) a siloxane segment derived from 0.01 to 30 wt. % of a terminal-reactive silicone oil of the following general formula I: ##STR1## wherein R.sub.1 represents an alkyl or phenyl group, R.sub.2 represents a divalent organic group, X represents a group selected from the group consisting of --NH.sub.2, --OH, ##STR2## --R.sub.4 OH, --R.sub.5 COOH, --R.sub.6 COOR.sub.7, --R.sub.8 and --OR.sub.9, R.sub.3 represents a divalent organic group, R.sub.4 to R.sub.6 each represent an alkylene group having 1 to 10 carbon atoms, R.sub.7 to R.sub.

Abstract: A resin composition, being useful for coating on electric wire, comprises an aromatic polyester, a halogenated compound such as diol, diglycidyl and dicarboxylic acid and a di-heterocyclic compound.

Abstract: A halogen-containing polyester resin composition comprises a flame retardant aromatic polyester copolymer having a halogen content of 0.5 to 30 wt. %, obtained by poly-condensating(A) mainly aromatic dicarboxylic acids or ester-forming derivatives thereof;(B) mainly aliphatic glycols or ester-forming derivatives thereof; and(C) halogen-containing ester-forming compounds, and 0.1 to 10 wt. %, based, on the entire composition of a bisaziridine compound. The composition is useful to coat an electric wire therewith.

Abstract: Silicon-containing copolyester are in the form of a block copolymers comprising,(i) between about 1 to 99% by weight of a siloxane segment which is at least one selected from the group consisting of siloxane segments expressed by the following general formulas; ##STR1## where R and R', which may be the same or different, are each hydrocarbon moieties having 1 to 10 carbon atoms, and m is an integer between 1 to 2000; and(ii) between about 99 to about 1% by weight of a polyester segment which is at least one selected from polyester segments of the following general formulas: ##STR2## where R.sub.1 is at least one radical selected from the group consisting of aromatic bivalent radicals having 6 to 12 carbon atoms and aliphatic bivalent radicals having 4 to 20 carbon atoms, R.sub.2 is at least one radical selected from the group consisting of aromatic bivalent radicals having 6 to 20 carbon atoms, and aliphatic bivalent radicals having 2 to 20 carbon atoms, and n is an integer between 1 and 1000.

Abstract: An electric transmission line comprises an electrically conductive line and a covering layer on the line being composed of a halogen-containing, flame-retarding, aromatic polyester of (A) an aromatic dicarboxylic acid or an ester-forming derivative thereof, (B) an aliphatic glycol or an ester-forming derivative thereof and (C) an ester-forming compound containing a halogen atom.

Abstract: A polyester copolymer comprise 20 to 80 percent by mole of hydroxy-benzoic acid units, 1 to 40 percent by mole of naphthalene units and 1 to 40 percent by mole of dihydroxy-diphenylketone units. It is improved in the heat resistance and is specified by exhibiting the anisotropy in the molten state.

Abstract: The invention process comprises reacting a polyester with a hydroxy-aromatic carboxylic ester to effect the transesterification and then further polymerizing the product. The process is conducted so that the obtained product has a high molecular weight and does not contain impurities, without corrosion of a used reactor.