Polyplastics Co., Ltd.

Hiroaki Konuma

Kenji Hijikata

Toshio Nakane

Yukihiko Kageyama

Michiro Naka

Kuniaki Kawaguchi

Yoshiharu Suzuki

Toshio Shiwaku

Mitsuo Wada

Toshiro Murao

A transparent polyester container is produced by melt-molding a copolyester resin containing 75 to 98 molar % of repeating units of an ester of terephthalic acid with 1,4-butanediol with the balance mainly containing repeating units of an ester of terephthalic acid with an alkylene oxide adduct of a bisphenol compound, rapidly cooling the molding to prepare a sheet having a low crystallinity, maturing the sheet at a temperature selected so as to meet a requirement represented by the following formula (1) to prepare a sheet satisfying a requirement represented by the following formula (2) and subjecting the sheet to thermoforming through the use of a cavity mold at a temperature falling within a range represented by the following formula (3):

Thermoforming process for forming a sheet of polybutylene terephthalate

A heat-resistant moldable copolyester resin is the copolymerization reaction product of a diol monomer component comprised mainly of 1,4-cyclohexanedimethanol, and an acid monomer component which includes first and second carboxylic acid comonomers. The first acid comonomer is a napthalenedicarboxylic acid or an ester-forming derivative thereof, while the second acid comonomer is 4,4'-diphenyldicarboxylic acid or an ester-forming derivative thereof. The first and second comonomers are present in amounts which satisfy the molar fraction ratio:

Heat-resistant injection-moldable copolyester resins and resin blends of

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.

Flame-retardant resin composition and electric wire

A process for producing a transparent film includes forming a melt from a copolyester having structural units represented by the following formulas I and II, respectively: ##STR1## wherein R groups may be the same or different from each other are each selected from the group consisting of

Processes for producing transparent copolyester films

A copolyester resin is the polycondensation reaction product of (a) terephthalic acid or a dialkyl terephthalate, (b) at least one alkylene glycol having 2 to 8 carbon atoms, and (c) a dimer diol having as a main component a compound of the following formula (1): ##STR1## wherein R.sub.1 through R.sub.4 are each unsaturated linear organic groups such that the total number of carbon atoms of R.sub.1, R.sub.2, R.sub.3 and R.sub.4 is between 22 to 34. Preferably, R.sub.1 and R.sub.2, which may be the same or different, each represent an alkyl group, and R.sub.3 and R.sub.4, which may be the same or different, each represent an alkylene group. The resin of the present invention may be melt-blended with a filler material and formed into a film by suitable film-forming techniques. The film is especially advantageous due to its heat-sealing and mechanical properties.

Copolyester resins and methods of making the same

A polyester resin composition exhibiting improved heat-resistant flexibility including (A) a polyester copolymer which is the polycondensation reaction product of (a) an aromatic dicarboxylic acid or an ester-forming derivative thereof, (b) an aliphatic glycol, and (c) between 0.001 to 1.0 mole %, based upon component (a), of a branch-forming compound, and (B) between 0.1 to 10% by weight (based on the total weight of the composition) of a bisoxazoline compound.

Polyester resin composition

An electric wire comprising a conductive wire in which the surface thereof is covered with a covering material having improved long-term thermal stability and comprising a polymer comprised of an aromatic polyester as a main skeleton and a compound represented by the following general formula (A) incorporated therein in an amount of 0.1 to 20 parts by weight based on 100 parts by weight of said polymer: ##STR1## wherein X is a halogen, Y.sub.1 and Y.sub.2 which may be the same or different are each a functional group containing an epoxy group, Z is a divalent organic group and n is an integer of 1 or more.

Polyester composition-covered wire

The present invention provides a novel flame-retardant halogenated copolyester containing a branched or crosslinked structure to an extent such that it will not impair the solubility of the copolyester in solvent to thereby reduce the lowering in the softness caused by thermal history. Therefore, this copolyester and a composition comprising the same are particularly useful as a coating material for an electric wire to be used in the vicinity of a heat source or in an environment in danger of heat buildup.

Flame-retardant halogenated copolyester and electric wire coated with

A flame-retarding polyester composition is useful for coating an electric wire, which comprises a melt-mixture of, (A) a copolyester having a halogen content of 0.5 to 30 wt. % and (B) a branched copolymer prepared by the condensation polymerization of monomers mainly comprising

Flame-retardant halogenated polyester resin composition and electric

A halogenated polyester resin composition is useful as coating for an electric wire and comprises a flame-retardant aromatic polyester copolymer having a halogen content of 0.5 to 30 wt. % which is produced by a polycondensation reaction of:

Halogenated polyester resin composition and electric wire

A resin composition useful for coating electrically conductive wires which comprises (A) a halogen containing polyester having a halogen content of 0.5 to 30 wt. % and being a polycondensation product of:

Halogen-containing polyester resin composition and covered wire

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

Three dimensional molded articles comprising liquid crystalline polyesters are recognized to be extremely difficult to finish such as by printing, painting, metallizing, plating, etc. An effective answer to this difficulty is provided by initially blending within the liquid crystalline polyester at least one particulate inorganic filler selected from the group consisting of Group II elements of the periodic table and oxides, sulfates, phosphates, silicates, and carbonates thereof, and elements of aluminum, silicon, tin, lead, antimony, and bismuth and oxides thereof, in an amount of 5 to 80 percent by weight; forming a molded article from the same; and contacting the resulting molded article with an acidic solution containing at least 80 percent by weight of sulfuric acid. The requisite surface modification for finishing to form a quality product is made possible.

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Shimizu, Japan

Hiroaki Konuma