Process for producing a film-like and fibrous article of a wholly aromatic polyester
申请人:TEIJIN LIMITED
公开号:EP0070539A1
公开(公告)日:1983-01-26
A wholly aromatic polyester composition comprising
(a) 100 parts by weight of a wholly aromatic polyester containing as a main component at least one compound selected from the group consisting of aromatic dicarboxylic acids, aromatic dihydroxy compounds and aromatic hydroxycarboxylic acids, and
(b) from 5 to 300 parts by weight of a low-molecular-weight compound being substantially non-reactive with the wholly aromatic polyester and having a boiling point of at least about 200°C under atmospheric pressure and a molecular weight of not more than 1.000.
The wholly aromatic polyester composition is produced advantageously by polycondensing in the molten state the polyester-forming starting mixture in the presence of the low-molecular-weight compound.
A film-like or fibrous article of a wholly aromatic polyester may be produced by extracting the low-molecular-weight compound from a film-like or fibrous article of the wholly aromatic polyester composition.
Production of a film-like or fibrous structure of an aromatic polyester
申请人:TEIJIN LIMITED
公开号:EP0057387A2
公开(公告)日:1982-08-11
A process for producing a film-like or fibrous structure of an aromatic polyester, which comprises
(1) forming an unstretched film-like or fibrous structure by melt-shaping a blend comprising 100 parts by weight of (A) an aromatic polyester having a high degree of polymerization derived from an aromatic dicarboxylic acid as a main acid component and an aliphatic diol and/or an alicyclic diol as a main glycol component and (B) 3 to 300 parts by weight of a low-molecular-weight compound being substantially non-reactive with the aromatic polyester (A) and having a boiling point of at least about 200°C under atmospheric pressure and a molecular weight of not more than 1,000,
(2) stretching the resulting film-like or fibrous structure,
(3) extracting at least a major portion of the low-molecular-weight compound from the stretched film-like or fibrous structure by using an organic solvent which does not substantially dissolve the aromatic polyester under the extracting conditions, and
(4) if desired, heat-setting the film-like or fibrous structure after the stretching step (2) and/or the extracting step (3).
The film-like or fibrous structure of an aromatic polyester prepared by the process substantially contains no low-molecular-weight compound or contains the low-molecular-weight compound in an amount of up to about 1 part by weight at most per 100 parts by weight of the aromatic polyester.
Wholly aromatic polyester composition and process for producing it
申请人:TEIJIN LIMITED
公开号:EP0156966A1
公开(公告)日:1985-10-09
A wholly aromatic polyester composition comprising
(a) 100 parts by weight of a wholly aromatic polyester containing as a main component at least one compound selected from the group consisting of aromatic dicarboxylic acids, aromatic dihydroxy compounds and aromatic hydroxycarboxylic acids, and
(b) from 5 to 300 parts by weight of a low-molecular-weight compound, which is non-reactive with the wholly caromatic polyester and has a boiling point of at least 200 °C under atmospheric pressure and a molecular weight of not more than 1,000 and is selected from the group consisting of imide compounds of the formula (1)-a
wherein A' represents a divalent aromatic group which may be substituted; R1 represents an aromatic group or linear or cyclic aliphatic group having a valence of n, each of which may be substituted; n is 1 or 2; and the imide ring is 5- or 6-membered, imide compounds of formula (1)-b
wherein A2 represents a tetravalent aromatic group which may be substituted; R2 represents a monovalent linear or cyclic aliphatic group which may be substituted; and the imide rings are 5- or 6-membered, trialkyl isocyanurates of formula (1)-c
wherein R3 represents a monovalent alkyl group,and diphenyl sulfone compounds of formula (1)-d
wherein the phenyl rings may be substituted.
Mixtures of polyamideimides, containing 3,4'-diaminodiphenylether as diamine component, and of a plasticizer.
申请人:TEIJIN LIMITED
公开号:EP0210851A2
公开(公告)日:1987-02-04
A polyimide capable of forming a self-supporfing film, comprising a unit represented by the following formula (I)
and a unit represented by the following formula (II)
as main units forming the molecular chains of the polyimide; and an intimate mixture comprising (A) a polyamideimide comprising a unit of the following formula (II)
and a unit of the following formula (IV)
as main units forming the molecular chains of the polyamideimide, and (B) a plasticizing material for the polyamideimide (A).
Application of the Study of Reactivity of Alkaline Salts of Isocyanuric Acid to the Synthesis of Mono- and Trisubstituted Isocyanurates
作者:Muriel Chiron-Charrier、Paul Caubére
DOI:10.1080/00397919308013795
日期:1993.11
Reactivity of alkaline salts of isocyanuric acid has been studied. It has been established that the nucleophilic substitution is not selective because of the protonic exchanges between salts and substituted derivatives. The synthesis of mono or trisubstituted derivative is due to secondary reactions and to solvent effects. With this study, it has been possible to settle a method to prepare mono and trisubstituted derivatives of isocyanuric acid.