Teijin Limited

Teyin Limited

Tsuto Morinaga

Hiroo Inata

Makoto Ogasawara

Yataro Ichikawa

Kunitada Shimotohno

Kin-ichiro Miura

Akihiro Norike

Masato Ikegami

Shunichi Matsumura

Shoji Kawase

Takatoshi Kuratsuji

Akihiro Horike

Takanori Urasaki

Double-stranded DNA characterized by having sequences complementary to a single-stranded DNA which has a molecular size of about 2.67 Kb and is derived from mungbean yellow mosaic virus, and giving the restriction endonuclease cleavage map shown in FIG. 1 of the accompanying drawings; and double-stranded DNA characterized by having sequences complementary to a single-stranded DNA which has a molecular size of about 2.70 Kb and is derived from mungbean yellow mosaic virus, and giving the restriction endonuclease cleavage map shown in FIG. 2 of the accompanying drawings; and hybrid DNAs having the double-stranded DNAs inserted thereinto.

Double-stranded DNA having sequences complementary to a single-stranded

Double-stranded DNA characterized by having sequences complementary to a single-stranded DNA which has a molecular size of about 2.67 Kb and is derived from mungbean yellow mosaic virus, and giving the restriction endonuclease cleavage map shown in FIG. 1 of the accompanying drawings; and

The present invention provides a process for producing a saturated polyester having a reduced terminal carboxyl group content, which comprises reacting a carboxyl-terminated, substantially linear, fiber-forming saturated polyester with a monocyclic imino ether compound of the formula ##STR1## wherein R is a group of the following formula ##STR2## in which R.sup.1 is a hydrogen atom or a monovalent organic group non-reactive with the saturated polyester under the reaction conditions, R.sup.2 and R.sup.3 are a monovalent organic group non-reactive with the saturated polyester under the reaction conditions, and R.sup.1 and R.sup.2 may be bonded to each other, to form together with the nitrogen atom a 5- or 6-membered ring which is non-reactive with the saturated polyester under the reaction conditions; and X is a divalent organic group non-reactive with the saturated polyester under the reaction conditions, which has two or three ring-member carbon atoms constituting the imino ether ring, at an elevated temperature. The present invention also relates to a process for producing a molded article of a saturated polyester having a reduced terminal carboxyl group content which comprises intimately contacting a carboxyl-terminated, substantially linear, fiber-forming saturated polyester with a monocyclic imino ether compound represented by the formula (1) in a melt-molding machine at a temperature above the temperature at which the saturated polyester melts, or heat-treating a molded article composed of a carboxyl-terminated, substantially linear, fiber-forming saturated polyester with a monocyclic imino ether compound represented by the formula (1) at an elevated temperature at which the molded article can retain its form.

Method for reducing the terminal carboxyl group content of a saturated

A process for preparing a cured copolyetherester elastomeric composition comprising following steps I and II:

Process for preparing a cured copolyetherester elastomeric composition

A cured or uncured linear aromatic polyester composition melt-blended and composed of

Cured or uncured aromatic polyester composition and process for its

Cured aromatic polyester composition and process for its production

The present invention provides a substantially linear aromatic polyester carbonate consisting essentially of hydroxybenzoic acid unit, hydroquinone unit, and carbonate unit as well as, depending on the circumstances, aromatic carboxylic acid unit, and having an inherent viscosity of at least 0.5. The present invention also provides an industrially advantageous method for producing such linear aromatic polyester carbonate through the process steps of melt-polycondensation, and, if necessary, followed by a further polycondensation in solid phase. Such aromatic polyester carbonate which the present invention provides exhibits excellent melt-forming property and melt anisotropy, hence any shaped article obtained by melt-forming of this aromatic polyester carbonate exhibits superior mechanical properties, in particular, excellent Young's modulus of longitudinal elasticity, and so on, which is highly useful as the material for industrial applications. The present invention also provides shaped articles in fiber and film forms having such excellent Young's modulus of longitudinal elasticity as produced from the abovementioned aromatic polyester carbonate.

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Hino, Japan

Tsuto Morinaga