Patents Represented by Attorney John W. Whisler

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  • Melt preparation of 6TA/6IA polymers with phosphorus compound to reduce ammonia formation
    Patent number: 4113708
    Abstract: An improvement in the process for preparing random copolyamides by the melt polymerization of a mixture of hexamethylenediammonium terephthalate and hexamethylenediammonium isophthalate is described. The improvement comprises accomplishing the melt polymerization in the presence of a small amount of a certain phosphorus compound, such as benzene phosphinic acid, whereby ammonia formation during polymerization is reduced.
    Type: Grant
    Filed: January 14, 1977
    Date of Patent: September 12, 1978
    Assignee: Monsanto Company
    Inventors: Richard D. Chapman, Donald A. Holmer, George A. Mortimer
  • Phosphorus-containing copolyamides and fibers thereof
    Patent number: 4092302
    Abstract: Copolyamides containing from 0.5 to 7.5 percent by weight of phosphorus as an integral part of their polymer chain are provided such as copolyamides prepared from adipic acid, hexamethylene diamine, and bis(.beta.-carboxyethyl)alkylphosphine oxide. Fibers prepared from these copolymers have permanent antistatic, moisture transport, moisture regain, and flame-resistant properties and are particularly useful in textile fiber applications such as in apparel, carpets and upholstery.
    Type: Grant
    Filed: March 3, 1977
    Date of Patent: May 30, 1978
    Assignee: Monsanto Company
    Inventors: Oscar A. Pickett, Jr., John W. Stoddard
  • Process for continuously preparing shaped articles of aromatic oxadiazole or aromatic oxadiazole/N-alkylhydrazide polymers from monomer solutions
    Patent number: 4054633
    Abstract: An economical process for continuously producing shaped articles of aromatic oxadiazole or aromatic oxadiazole/N-alkylhydrazide polymers from certain monomer solutions is provided. The process involves continuously feeding monomer solution into a heated, pressurized continuous reactor to provide dope which is continuously extruded into an aqueous medium to provide a shaped article.
    Type: Grant
    Filed: May 13, 1976
    Date of Patent: October 18, 1977
    Assignee: Monsanto Company
    Inventor: John C. Richardson
  • Process for preparing dopes from which shaped articles of oxadiazole/N-alkylhydrazide copolymers are obtained
    Patent number: 4046731
    Abstract: Dopes from which shaped articles of oxadiazole/N-alkylhydrazide copolymers are provided. The dopes are prepared in a matter of minutes by combining and mixing a slurry of aromatic dihydrazide in aromatic diester with a mineral acid such as oleum.
    Type: Grant
    Filed: May 13, 1976
    Date of Patent: September 6, 1977
    Assignee: Monsanto Company
    Inventors: George A. Mortimer, Chris A. Pelezo, John C. Richardson
  • Phosphorus-containing copolyamides and fibers thereof
    Patent number: 4032517
    Abstract: Copolyamides containing from 0.5 to 7.5% by weight of phosphorus as an integral part of their polymer chain are provided such as copolyamides prepared from adipic acid, hexamethylene diamine, and bis(.beta.-carboxyethyl)alkylphosphine oxide. Fibers prepared from these copolymers have permanent antistatic, moisture transport, moisture regain, and flame-resistant properties and are particularly useful in textile fiber applications such as in apparel, carpets and upholstery.
    Type: Grant
    Filed: July 22, 1975
    Date of Patent: June 28, 1977
    Assignee: Monsanto Company
    Inventors: Oscar A. Pickett, Jr., John W. Stoddard
  • Copolyamides derived from cyclohexanebis(ethylamine)
    Patent number: 4024114
    Abstract: Polyamides derived from cyclohexanebis(ethylamine) provide a class of polyamides useful in fabricating shaped articles.
    Type: Grant
    Filed: September 15, 1971
    Date of Patent: May 17, 1977
    Assignee: Monsanto Company
    Inventor: James S. Ridgway
  • Dimensionally stable 6TA/6IA fibers
    Patent number: 4022756
    Abstract: Dimensionally stable fibers are produced from copolymers prepared from substantially equimolar amounts of hexamethylene diamine and a 50:50 to 80:20 mixture of terephthalic and isophthalic acids by heating essentially amorphous fibers melt spun from the copolymers to a temperature between about 160.degree. C. and 300.degree. C. for a short period of time. The dimensionally stable fibers combine many of the best properties of nylon 66 and poly(ethylene terephthalate) and are particularly useful in tire and textile applications.
    Type: Grant
    Filed: April 9, 1975
    Date of Patent: May 10, 1977
    Assignee: Monsanto Company
    Inventors: Richard D. Chapman, Donald A. Holmer, Oscar A. Pickett, Jr., James H. Saunders
  • Yarn texturing apparatus
    Patent number: 4019229
    Abstract: Apparatus is disclosed for texturing thermoplastic continuous filament yarn wherein the distance that the yarn in compacted form moves forward in a texturizer is controlled by a particular device. The device comprises a plurality of stationary elongated juxtaposed yarn guide members arranged generally parallel with respect to the path taken by the compacted yarn and having a cumulative yarn frictional engaging length diminishing in the direction of the movement taken by the yarn in compacted form.
    Type: Grant
    Filed: September 23, 1975
    Date of Patent: April 26, 1977
    Assignee: Monsanto Company
    Inventor: Pelham D. Chastang
  • Fiber-forming polyhydrazides
    Patent number: 3957735
    Abstract: Fiber-forming polyhydrazides prepared from oxalic dihydrazide, terephthalic dihydrazide, malonic dihydrazide and terephthaloyl chloride are provided. Yarns made from these polyhydrazides are useful in tire cord applications and retain greater tenacity when plied into cord than yarns made from corresponding polyhydrazides from which the malonic dihydrazide has been omitted.
    Type: Grant
    Filed: April 29, 1975
    Date of Patent: May 18, 1976
    Assignee: Monsanto Company
    Inventor: James S. Ridgway
  • Fiber-forming 6TA/6IA copolymers
    Patent number: 3941755
    Abstract: Copolymers made from hexamethylenediamine and a mixture of tere- and isophthalic acids in which the mixture contains between about 60 and 80 mole percent terephthalic acid are described as well as useful fibers prepared therefrom.
    Type: Grant
    Filed: November 15, 1974
    Date of Patent: March 2, 1976
    Assignee: Monsanto Company
    Inventors: Richard D. Chapman, Donald A. Holmer, Oscar A. Pickett, Jr., James H. Saunders