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US4021415A Expired / Lapsed US ⏱️ 0.0 years remaining

Nitrile containing aromatic polyamide polymers

Assignee: Individual
•
Filing: 1974-03-25
•
Granted: 1977-05-03
•
Expires: 1994-03-25
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Abstract

Abstract Novel aromatic nitrile-containing polyester, polyamide, and silicone polymers are described. These nitrile-containing polymers are heat resistant and are used as fibers and resins and to prepare fiber-reinforced composites exhibiting outstanding mechanical strength at room and particularly elevated temperatures. Styrene-butadiene and styrene-acrylonitrile copolymers are described wherein at least some of the phenyl groups contain nitrile substituents. Composites having various shapes such as tires are described utilizing these nitrile-containing copolymers reinforced with fibers either containing aromatic nitrile groups or coated with resins containing nitrile substituted aromatic groups. These composites are useful in a variety of applications. The procedure for preparing such composites is disclosed.

Inventors

  • 👤 William J. H. Chang

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-31 19:35
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02; C08G69/26; C08G69/32; C08G63/00; C08G63/68; C08G63/685; C08G63/6854; C08G63/6856; C08G69/44; C08G77/00; C08G77/04; C08G77/22; C08G77/26; C08G77/38; C08G77/382; C08G77/388; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31616; Y10T428/31623; Y10T428/31725; Y10T428/31786

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 121 words
Nitrile-containing aromatic polyamide polymers having the general structures ##STR7## wherein Ar 1 and Ar 2 are aryl radicals, at least one of which contains one nitrile group, Ar 3 and Ar 4 are aryl radicals which may contain one nitrile group, Y 1 , y 2 , y 3 , and Y 4 are O or NH groups, or mixtures thereof, at least one of which must be an NH group, and wherein Y 1 equals Y 2 , Y 3 equals Y 4 and Y 1 is different from Y 3 , n 1 is any integer greater than zero, n 2 is a positive integer, and the molecular weight of the polymer is from about 100 to about 1,000.
Claim 2
Dependent Claim 121 words
Nitrile-containing aromatic polyamide polymers having the general structures ##STR7## wherein Ar 1 and Ar 2 are aryl radicals, at least one of which contains one nitrile group, Ar 3 and Ar 4 are aryl radicals which may contain one nitrile group, Y 1 , y 2 , y 3 , and Y 4 are O or NH groups, or mixtures thereof, at least one of which must be an NH group, and wherein Y 1 equals Y 2 , Y 3 equals Y 4 and Y 1 is different from Y 3 , n 1 is any integer greater than zero, n 2 is a positive integer, and the molecular weight of the polymer is from about 100 to about 1,000.
Claim 3
Dependent Claim 49 words
Nitrile-containing aromatic polyamide polymers having the general structures ##STR8## wherein Ar 1 and Ar 2 are aryl radicals, at leat one of which contains a nitrile group, n 1 is an integer greater than zero, and the molecular weight of the polymer is from about 100 to about 1,000.
Claim 4
Dependent Claim 49 words
Nitrile-containing aromatic polyamide polymers having the general structures ##STR8## wherein Ar 1 and Ar 2 are aryl radicals, at leat one of which contains a nitrile group, n 1 is an integer greater than zero, and the molecular weight of the polymer is from about 100 to about 1,000.

References Cited (Backward Citations)

US3516967A Cited
US3692750A Cited
US3836506A Cited
US3907752A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1980-05-02 1980-11-01 1981-05-03 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1984-05-02 1984-11-01 1985-05-03 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1988-05-02 1988-11-01 1989-05-03 $7700.00 Window Closed / Lapsed

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