The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 23, 1979
Filed:
Nov. 14, 1977
Lacey E Scoggins, Bartlesville, OK (US);
Robert W Campbell, Bartlesville, OK (US);
Phillips Petroleum Company, Bartlesville, OK (US);
Abstract
Terephthalic acid and a diamine, always including 5-methyl-1,9-nonanediamine, and a lower fatty acid, e.g., acetic acid, are admixed with water, the water is evaporated, the concentrated mixture is heated (100.degree.-200.degree. C., 1/2-2 hrs.); then heated further (125.degree.-295.degree. C., 1/2-3 hrs., autogenous pressure up to 150-600 psig) with venting as needed; decompressed to atmospheric pressure (1/4-2 hrs., 245.degree.-295.degree. C.); and heated (270.degree.-295.degree. C., 1/2-2 hrs.) to produce a polyamide having good acid and basic dye receptivity, inherent viscosity, melt spinning and drawing characteristics. An isomeric mixture of diamines containing 5-methyl-1,9-nonanediamine, and 2,4-dimethyl-1,8-octanediamine, 2,4,6-trimethyl-1,7-heptanediamine and/or 4-isopropyl-1,7-heptanediamine can be the starting 5-methyl-1,9-nonanediamine-furnishing material. The diamine-furnishing material contains at least one principal diamine component having the formula H.sub.2 NRNH.sub.2, where R is selected from the group consisting of 5-methylnonamethylene, 2,4-dimethyloctamethylene, 2,4,6-trimethylheptamethylene, and 4-isopropylheptamethylene, the R in the formula of at least about 50 percent of the principal diamine component molecules initially present in the reaction being 5-methylnonamethylene. Other structural units, up to about 20 mole percent, can be present in the product which preferably will be at least 90 mole percent and up to about 98 mole percent and even up to about 100 mole percent derived from the foregoing recited terephthalic acid and diamines. Such other structural units are supplied by, e.g., other diamines, other dicarboxylic acids, amino acids and lactams.