Outerwear fabric treatment
First Claim
Patent Images
1. THE PROCESS FOR CONFERRING DURABLY LAUNDERABLE AQUEOUS DRY-CLEANABLE REPELLENCY TO OIL AND WATER ON FABRICS CONSISTING SUBSTANTIALLY COMPLETELY OF HYDROPHOBIC SYNTHETIC FIBERS CONSISTING ESSENTIALLY OF APPLYING TO SAID FABRIC A BLEND, IN SUITA ABLE AQUEOUS OR NON-AQUEOUS MEDIUM, IN PROPORTIONS OF 10.90 TO 95:
- , OF A. FLUOROALIPHATIC RADICAL-CONTAINING SUBSTANTIALLY LINEAR VINYL POLYMER CONTAINING FROM 10 TO 60 PERCENT BY WEIGHT THEREOF OF FLUORINE IN THE FORM OF FLUOROALIPHATIC RADICALS TERMINATING IN CF3 GROUPS, SAID FLUOROALIPHATIC RADICALS CONTAINING AT LEAST THREE FULLY FLUORINATED CARBON ATOMS, AND B. A SOLVENT-SOLUBLE CARBODIMIDE CONSISTING ESSENTIALLY OF FROM 1 TO A PLURALITY OF CARBODIMIDE GROUPS, TERMINAL ORGANIC RADICALS FREE FROM ISOCYANATE-REACTIVE HYDROGEN ATOMS CONNECTED O CARBONIIMIDE AND, WHEN TWO OR MORE CARBODIIMIDE GROUPS ARE PRESENT, POLYVALENT ORGANIC GROUPS, RESIDUES OF POLYISOCYANATES, LINKING SUCCESSIVE CARBODIIMIDE GROUPS, AND THEREAFTER VAPORIZING SAID MEDIUM WHEREBY A COATING OF SAID BLEND IS DEPOSITED ON SAID SYNTHETIC FIBERS.
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Abstract
Durably launderable and dry-cleanable repellancy 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.
101 Citations
7 Claims
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1. THE PROCESS FOR CONFERRING DURABLY LAUNDERABLE AQUEOUS DRY-CLEANABLE REPELLENCY TO OIL AND WATER ON FABRICS CONSISTING SUBSTANTIALLY COMPLETELY OF HYDROPHOBIC SYNTHETIC FIBERS CONSISTING ESSENTIALLY OF APPLYING TO SAID FABRIC A BLEND, IN SUITA ABLE AQUEOUS OR NON-AQUEOUS MEDIUM, IN PROPORTIONS OF 10.90 TO 95:
- , OF A. FLUOROALIPHATIC RADICAL-CONTAINING SUBSTANTIALLY LINEAR VINYL POLYMER CONTAINING FROM 10 TO 60 PERCENT BY WEIGHT THEREOF OF FLUORINE IN THE FORM OF FLUOROALIPHATIC RADICALS TERMINATING IN CF3 GROUPS, SAID FLUOROALIPHATIC RADICALS CONTAINING AT LEAST THREE FULLY FLUORINATED CARBON ATOMS, AND B. A SOLVENT-SOLUBLE CARBODIMIDE CONSISTING ESSENTIALLY OF FROM 1 TO A PLURALITY OF CARBODIMIDE GROUPS, TERMINAL ORGANIC RADICALS FREE FROM ISOCYANATE-REACTIVE HYDROGEN ATOMS CONNECTED O CARBONIIMIDE AND, WHEN TWO OR MORE CARBODIIMIDE GROUPS ARE PRESENT, POLYVALENT ORGANIC GROUPS, RESIDUES OF POLYISOCYANATES, LINKING SUCCESSIVE CARBODIIMIDE GROUPS, AND THEREAFTER VAPORIZING SAID MEDIUM WHEREBY A COATING OF SAID BLEND IS DEPOSITED ON SAID SYNTHETIC FIBERS.
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2. The process according to claim 1 for conferring durably launderable and dry-cleanable repellency to oil and water on fabrics consisting substantially completely of hydrophobic synthetic fibers consisting essentially of applying to said fabric a blend, in suitable aqueous or non-aqueous medium, in proportions of 10:
- 90 to 95;
5, of A. fluoroaliphatic radical-containing substantially linear vinyl polymer containing from 10 to 60 percent by weight thereof of fluorine in the form of fluoroaliphatic radicals terminating in CF3 groups, said fluoroaliphatic radicals containing at least three fully fluorinated carbon atoms, and B. a carbodiimide consisting essentially of from 1 to a plurality of carbodiimide groups, terminal hydrocarbon or fluoroaliphatic radicals free from isocyanate-reactive hydrogen atoms and connected to carbodiimide and, when two or more carbodiimide groups are present, polyvalent organic groups, residues of polyisocyanates, linking successive carbodiimide groups, and thereafter vaporizing said medium whereby a coating of said blend is deposited on said synthetic fibers.
- 90 to 95;
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3. The process according to Claim 2 wherein the fluoroaliphatic radical containing vinyl polymer is an acrylate or methacrylate.
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4. The process according to Claim 2 wherein the carbodiimide includes fluoroaliphatic radicals at least in terminal groups.
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5. The process according to claim 4 wherein the carbodiimide includes fluoroaliphatic radicals in terminal and linking groups.
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6. The process according to claim 5 wherein fluoroaliphatic radicals contain from 3 to 18 fully fluorinated carbon atoms.
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7. A durably launderable and dry-cleanable, oil and water repellent fabric consisting substantially completely of hydrophobic synthetic fibers having a coating thereon of a blend, in proportions of from about 10:
- 90 to 95;
5, of A. fluoroaliphatic radical-containing substantially linear vinyl polymer containing from 10 to 60 percent by weight thereof of fluorine in the form of fluoroaliphatic groups terminating in CF3 groups, said fluoroaliphatic groups containing at least three fully fluorinated carbon atoms, and B. a carbodiimide consisting essentially of from 1 to a plurality of carbodiimide groups, terminal organic radicals free from isocyanatereactive hydrogen atoms connected to carbodiimide and, when two or more carbodiimide groups are present, polyvalent organic groups, residues of polyisocyanates, linking successive carbodiimide groups;
said coating being in amount to provide from 0.02 to 0.5 percent by weight of carbon-bonded fluorine on the fabric.
- 90 to 95;
Specification