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US3898200A Expired / Lapsed US ⏱️ 0.0 years remaining

Cationic dyeable polyamide of improved physical properties

Assignee: Honeywell International Inc
•
Filing: 1974-06-12
•
Granted: 1975-08-05
•
Expires: 1994-06-12
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Abstract

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.

Inventors

  • 👤 Robert Alden Lofquist

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-01 03:55
CPC Classifications
C; C08; C08G; C08G69/00; C08G69/02

Claims Analysis

Total Claims: 13
Claim 1
Independent Claim 50 words
A CATIONIC-DEYABLE LINEAR POLYCARBONAMIDE HAVING RECURRING AMIDE GROUPS POLYMERIZED FROM W-AMINOCARBOXYLIC ACIDS OR THEIR LACTAMS AND CONTAINING AS AN INTERGAL 000PART OF THE POLYMER CHAIN FROM ABOUT 0.30 TO ABOUT 0.85 MOLE K PERCENT BASED ON THE WEIGHT OF POLYCARBONAMIDE OF UNITS SELECTED FROM THE GROUP CONSISTING OF THE STRUCTURES.
Claim 2
Dependent Claim 50 words
A CATIONIC-DEYABLE LINEAR POLYCARBONAMIDE HAVING RECURRING AMIDE GROUPS POLYMERIZED FROM W-AMINOCARBOXYLIC ACIDS OR THEIR LACTAMS AND CONTAINING AS AN INTERGAL 000PART OF THE POLYMER CHAIN FROM ABOUT 0.30 TO ABOUT 0.85 MOLE K PERCENT BASED ON THE WEIGHT OF POLYCARBONAMIDE OF UNITS SELECTED FROM THE GROUP CONSISTING OF THE STRUCTURES.
Claim 3
Dependent Claim 13 words
The polycarbonamide of claim 1 wherein x is 2 and w is 6.
Claim 4
Dependent Claim 10 words
The polycarbonamide of claim 2 wherein the polycarbonamide is polycaprolactam.
Claim 5
Dependent Claim 39 words
A cationic dyeable synthetic linear polycaprolactam having recurring amide groups and containing as an integral part of the polymer chain from about 0.35 to about 0.85 mole percent based on the weight of polycarbonamide of units of the structure:
Claim 6
Dependent Claim 39 words
A cationic dyeable synthetic linear polycaprolactam having recurring amide groups and containing as an integral part of the polymer chain from about 0.35 to about 0.85 mole percent based on the weight of polycarbonamide of units of the structure:
Claim 7
Dependent Claim 9 words
The polycaprolactam of claim 4 wherein w is 6.
Claim 8
Independent Claim 49 words
A method of preparing a cationic-dyeable synthetic linear polycarbonamide polymerized from omega -aminocarboxylic acids or their lactams by adding to said polycarbonamide prior to polymerization thereof from about 0.30 to about 0.85 mole percent based on the weight of polycarbonamide of a compound selected from the group consisting of:
Claim 9
Independent Claim 49 words
A method of preparing a cationic-dyeable synthetic linear polycarbonamide polymerized from omega -aminocarboxylic acids or their lactams by adding to said polycarbonamide prior to polymerization thereof from about 0.30 to about 0.85 mole percent based on the weight of polycarbonamide of a compound selected from the group consisting of:
Claim 10
Dependent Claim 17 words
The method of claim 6 wherein said polymer is spun into filaments to form a cationic-dyeable yarn.
Claim 11
Dependent Claim 13 words
The method of claim 6 wherein x is 2 and w is 6.
Claim 12
Dependent Claim 10 words
The method of claim 6 wherein said polycarbonamide is polycaprolactam.
Claim 13
Dependent Claim 16 words
The method of claim 6 wherein said polycaprolactam is spun into filaments to form cationic-dyeable yarn.

References Cited (Backward Citations)

US3477899A Cited
US3389549A Cited
US3709865A Cited
US3823120A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1978-08-04 1979-02-03 1979-08-05 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1982-08-04 1983-02-03 1983-08-05 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1986-08-04 1987-02-03 1987-08-05 $7700.00 Window Closed / Lapsed

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