Poly(arylene ether ketone), process for producing same and its use

• US 5,290,906 A
• Filed: 01/23/1991
• Issued: 03/01/1994
• Est. Priority Date: 05/23/1989
• Status: Expired due to Term

• Current Assignee: Teijin Limited
• Original Assignee: Teijin Limited
• Inventors: Itoh, Seiji, Matsumura, Shunichi, Sadanobu, Jiro, Inata, Hiroo
• Primary Examiner(s): Kight, III, John
• Assistant Examiner(s): HAMPTON HIGHTOWER, PATRICIA
• Application Number:
  US07/644,978
• Time in Patent Office: 1,133 Days
• Field of Search: 528/125, 528/126, 528/220, 528/174, 528/175, 525/534, 525/390, 428/411.1, 428/394, 428/357, 428/364
• US Class Current: 528/125
• CPC Class Codes: C08G 65/4012 Other compound (II) containing a ketone group, e.g. X-Ar-C(=O)-Ar-X for polyetherketones
• CPC Class Codes: C08J 2371/00 Characterised by the use of polyethers obtained by reactions forming an ether link in the main chain of polyacetals C08J2359/00; of epoxy resins C08J2363/00; of polythioether-ethers C08J2381/02; of polyethersulfones C08J2381/06; Derivatives of such polymers
• CPC Class Codes: C08J 5/18 Manufacture of films or sheets
• CPC Class Codes: D01F 6/665 from polyetherketones, e.g. PEEK
• CPC Class Codes: Y10T 428/29 Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
• CPC Class Codes: Y10T 428/2913 Rod, strand, filament or fiber
• CPC Class Codes: Y10T 428/2967 Synthetic resin or polymer
• CPC Class Codes: Y10T 428/31504 Composite [nonstructural laminate]

Abstract

A poly(arylene ether ketone) of this invention principally comprises recurring units represented by formula ##STR1## wherein Ar¹ denotes a 1,5-naphthalene ring, a 2,6-naphthalene ring, a 2,7-naphthalene ring or a combination of them, and Ar² denotes p-phenylene, p,p'"'"'-biphenylene, a 1,5-naphthalene ring, a 2,6-naphthalene ring, a 2,7-naphthalene ring or a combination of them.

The poly(arylene ether ketone) is high in second-order transition temperature and excellent in solvent resistance and moldability, and can be molded into heat-resistant fibers and electric insulating films.

Claims

1. A film of a crystalline poly(arylene ether ketone) in which the Young'"'"'s modulus is at least 400 kg/mm², the crystalline poly(arylene ether ketone) principally comprising recurring units represented by formula (4) ##STR27## and having inherent viscosity of at least 0.3 measured at 30°

C. in conc. sulfuric acid,

wherein main crystal lattice planes oriented parallel to the film surface are crystal lattice planes having spacings of 3.9±

0.2 Å and

4.7±

0.3 Å

, and an x-ray diffraction peak intensity ratio [I(4.7 Å

)/I(3.9 Å

)] of both crystal lattice planes measured by symmetrical-reflection technique is at most 0.4.

2. The film of claim 1 wherein the tan δ

peak temperature measured at 1 Hz is at least 160°

C.

6. The fiber of claim 1 wherein the inherent viscosity of the poly(arylene ether ketone) is at least 0.4.

3. A fiber of a crystalline poly(arylene ether ketone) in which the Young'"'"'s modulus is at least 1000 kg/mm², the crystalline poly(arylene ether ketone) principally comprising recurring units represented by formula (4) ##STR28## and having inherent viscosity of at least 0.3 measured at 30°

C. in conc. sulfuric acid,

a crystal size (L₁) normal to a crystal lattice plane which is perpendicular to a fiber axis and a crystal size (L₂) normal to a crystal lattice plane which is parallel to the fiber axis meet the following equations

space="preserve" listing-type="equation">20Å

>

L.sub.1 >

70 Å

space="preserve" listing-type="equation">130 Å

>

L.sub.2 >

50 Å

and a degree of orientation of a crystal is at least 90%.

4. The fiber of claim 3 wherein the inherent viscosity of the poly(arylene ether ketone) is at least 0.4.

5. The fiber of claim 3 wherein a degree of orientation of a crystal is at least 93%.