Abstract:
When from about 0.3 to about 8% of tertiary amines formed by the reaction between I. A. a monoepoxide of greater than four carbons but not styrene oxide and B. a primary amine, a diprimary amine, a secondary amine, a disecondary amine, a primary-secondary diamine, a primarytertiary diamine, a secondary-tertiary diamine, a polyamine, and ammonia; or II. A. an alkyl monoepoxide of four or fewer carbons or styrene oxide, and B. a secondary amine, a disecondary amine, a secondary-tertiary diamine, a primary-tertiary diamine, or a polyamine having greater than two carbons per nitrogen or III. A. styrene oxide and B. ammonia ARE COATED ON NYLON FIBER, OR ARE ADDED TO THE DYEBATH IMPROVED DYEFASTNESS TO OZONE IS OBTAINED COMPARED TO AN UNTREATED DYED NYLON FIBER.
Abstract:
When from about 0.3% to about 8% of tertiary amines formed by the reaction between I (A) diepoxides and/or polyepoxides and (B) secondary amines, or between II (A) diepoxides and (B) ammonia, primary amines, and/or primary tertiary diamines ARE COATED ON NYLON FIBER, OR ARE ADDED TO THE DYEBATH OR ARE COATED ON DYED FIBERS, IMPROVED DYEFASTNESS TO OZONE IS OBTAINED COMPARED TO AN UNTREATED DYED NYLON FIBER.
Abstract:
A cationic-dyeable polyamide, polymerized from omega aminocarboxylic acids or their lactams, of improved physical properties can be made by using from 0.25 to 0.85 mole percent (based on the polyamide) of the sodium salt of a sulfonated dicarboxylic acid such as 5-sulfoisophthalic acid and 0.07 to 0.65 mole percent of an N-sulfoalkyl alkyldiamine such as N-(4sulfobutyl)hexamethylenediamine, or N-(2-sulfoethyl)mxylylenediamine. A polyamide results containing the respectively same number of sulfo groups, but with less diluent and consequently having a higher melting point. The diacid can be a sulfonate derivative of a phthalic acid, or of fluorene, etc. The diamine can be a sulfonate derivative of hexamethylenediamine, metaxylylenediamine, etc. The use of the combination of additives eliminates the necessity of adding a diamine or dicarboxylic acid to achieve full polymerization.
Abstract:
It has been suggested that a high strength polycaproamide fiber having excess number of carboxyl end groups over amino end groups can be produced by melt spinning a polymer prepared by polymerizing e-caprolactam and reacting the polymer with a dibasic carboxylic acid containing at least six carbon atoms. However, with incorporation of this dicarboxylic acid reactant in continuous operation, serious problems have been encountered in melt-spinning of the polymer due to the frequent occurrence of ''''nubs'''' or enlarged places in the extruded polyamide filament. It has now been found that the occurrence of said nubs in the fiber can be greatly reduced by utilizing certain polyanhydrides of dicarboxylic acid and reacting the polyanhydride at the end of the polymerization. Moreover, dyeing properties of the fiber may be more readily controlled.
Abstract:
When from about 0.5 percent to about 5 percent of a polythiourea is coated on nylon fiber an improved dye fastness is achieved compared to untreated dyed nylon fiber when this fiber is exposed to ozone.
Abstract:
WHERE R is an alkyl or aralkyl radical having seven to 24 carbon atoms, R can contain one or two oxygen atoms as ester or ether linkages, R'' is alkylene, and has from two to ten carbons, and x, y and z are each at least 1 and total 10, or preferably 3, are coated on nylon fiber or added to nylon polymer before spinning, improved dyefastness is achieved when the fiber is exposed to ozone.
WHERE R is an alkyl or aralkyl radical having seven to 24 carbon atoms, R can contain one or two oxygen atoms as ester or ether linkages, and x and y are integers such that x and y are each at least 1, and x + y is not more than 10, preferably 2, or ditertiary amines such as
When from about 0.1 percent to about 8 percent of tertiary amines such as:
Abstract:
THE PREPARATION OF LINEAR HIGH-MOLECULAR WEIGHT, FILM AND FIBER FORMING POLYALKYLENE TEREPHTHALATES, COMPRISING REACTING EITHER BY DIRECT ESTERIFICATION OR ESTER INTERCHANGE AN ORGANIC DICARBOXYLIC ACID AND/OR THE LOWER ALKYL ESTER THEREOF WITH A POLYOL HAVING 2 TO 10 CARBON ATOMS PER MOLECULE TO OBTAIN THE CORRESPONSING DIGLYCOLESTER INTERMEDIATE AND THEN CONDENSING AND INTERMEDIATE IN THE PRESENCE OF AN EFFECTIVE AMOUNT OF A CONDENSATION ACCELERATOR WHICH IS AN ORTHOESTER OF AN ORGANIC ACID WHICH PRODUCES VOLATILE ALCOHOL AND ACID UPON REACTION WITH WATER.