Fluoroaliphatic radical containing carbodiimides

• US 4,024,178 A
• Filed: 03/03/1975
• Issued: 05/17/1977
• Est. Priority Date: 03/06/1972
• Status: Expired due to Term

• Current Assignee: Minnesota Mining and Manufacturing Co (3M Company)
• Original Assignee: Minnesota Mining and Manufacturing Co (3M Company)
• Inventors: Landucci, Dennis P.
• Primary Examiner(s): Raymond, Richard L.
• Application Number:
  US05/554,420
• Time in Patent Office: 806 Days
• Field of Search: 260/471 C, 260/472, 260/566 B
• US Class Current: 560/25
• CPC Class Codes: D06M 13/395 Isocyanates
• CPC Class Codes: D06M 13/428 containing fluorine atoms
• CPC Class Codes: D06M 13/432 Urea, thiourea or derivatives thereof, e.g. biurets; Urea-inclusion compounds; Dicyanamides; Carbodiimides; Guanidines, e.g. dicyandiamides
• CPC Class Codes: D06M 15/244 of halogenated hydrocarbons afterhalogenated hydrocarbons D06M15/227

Abstract

Durably launderable and dry-cleanable repellency to water and oil is conferred on fabrics consisting essentially completely of hydrophobic synthetic fibers by application of a blend of a fluoroaliphatic vinyl polymer and a carbodiimide, preferably comprising fluoroaliphatic groups.

Claims

1. A solvent-soluble fluoroaliphatic radical-containing carbodiimide consisting essentially of from 1 to a plurality of carbodiimide groups, terminal organic radicals derived from mono- or polyisocyanate and free from isocyanate-reactive hydrogen atoms and connected to carbodiimide and, when two or more carbodiimide groups are present, polyvalent organic linking groups derived from organic polyisocyanate and free from isocyanate-reactive hydrogen atoms linking successive carbodiimide groups;

fluoroaliphatic groups of 3 to 20 carbon atoms forming a part of said terminal organic radicals or organic linking groups in amounts such that said carbodiimide as a whole includes from 15 to 45% by weight of carbon-bonded fluorine and said carbodiimide as a whole exclusive of fluoroaliphatic radicals contains at least 12% by weight of carbodiimide groups.

2. A fluoroaliphatic radical-containing carbodiimide according to claim 1 of the general formula:

space="preserve" listing-type="equation">B--N=C=N-A).sub.n N=C=N--B

wherein n is 0 or an integer from 1 to 20, A is a divalent organic linking group derived from diisocyanate and B is a monovalent organic terminal group derived from mono- or diisocyanate;

fluoroaliphatic radicals with terminal CF₃ groups of from 3 to 20 fully fluorinated carbon atoms forming a part of at least one of A and B.