Fluorochemical composition for treatment of a fibrous substrate

a technology of fibrous substrate and composition, applied in the field of fluorochemical composition, can solve the problems of low amount of composition solids, low application rate of composition solids, and low efficiency of previously disclosed compositions based on perfluorinated polyether compounds, etc., and achieve the effect of low cos

Inactive Publication Date: 2008-05-22
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0006]The present invention provides fluorochemical compositions for imparting oil repellency, water repellency, stain release, and soil release to fibr...

Problems solved by technology

Typically this means that only low amounts of the solids of the composition can be applied.
It was found that previously disclosed compositions based on perfluorinated polyether compounds may not ...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

examples

Test Methods

[0099]Water Repellency Test (WR)

[0100]The water repellency (WR) of a substrate was measured using a series of water / isopropyl alcohol test liquids and was expressed in terms of the WR rating of the treated substrate. The WR rating corresponded to the most penetrating test liquid that did not penetrate or wet the substrate surface after 10 seconds exposure, according to the WR rating scale and the test liquid compositions summarized in the table below. Substrates which were penetrated by a 2% / 98% isopropyl alcohol / water blend, the least penetrating test liquid, were given a rating of 0, a treated substrate resistant to a 30% / 70% isopropyl alcohol / water blend, but not to an 40% / 60% blend, would be given a rating of 5, and so on.

Standard Water Repellency Test Liquids

[0101]

Water RepellencyTest Liquid Composition (Volume %)Rating # (WR)Isopropanol:Water1 2:982 5:95310:90420:80530:70640:60750:50

[0102]Oil Repellency (OR)

[0103]The oil repellency of a substrate was measured by th...

examples 1 to 7

[0122]Synthesis of FC Urethane Mixture A

[0123]A solution of HFPO oligomer alcohol (HFPO)7.7-alc (15.56 grams, 11.76 meq hydroxyl), MeFBSE (77.84 grams, 218.03 mmole), ARCOL™ POLYOL PPG-1025 (62.26 grams, 124.77 meq hydroxyl), and CARBOWAX™ MPEG-750 (20.80 grams, 27.73 meq hydroxyl) in ethyl acetate (EA, 220 grams) was heated and 82.5 grams distillate allowed to escape. DESMODUR™ N3300 (77.87 grams, 401.42 meq isocyanate), ethyl acetate (EA, 30 grams), and dibutyltin dilaurate (DBDTL, 0.06 grams) were added sequentially, and then heated for 6 hours at 75° C. 2-Butanone oxime (MEKO, 18.89 grams, 217.10 mmole), ethyl acetate (EA, 90 grams), and toluene diisocyanate based adduct in organic solvent (DESMODUR™ L 75, 62.37 grams, 197.99 meq isocyanate) were added sequentially, heated for 1 hour at 75° C., then diluted with ethyl acetate to a final 640 grams.

[0124]FC Urethane Mixture A solids comprised 80 weight percent aliphatic fluorochemical urethane and 20 weight percent blocked aromati...

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Abstract

Fluorochemical composition for rendering fibrous substrates oil repellent, water repellent, and/or stain or soil repellent. The composition comprises a dispersion or a solution of a fluorinated compound which comprises the reaction product of the following:
    • (i) one or more fluorinated polyethers according to the formula:
RfQTk  (I)
      • wherein Rf represents a monovalent perfluorinated polyether group having a number average molecular weight of at least 750 g/mol, Q represents a chemical bond or a divalent or trivalent organic linking group, T represents a functional group capable of reacting with an isocyanate, and k is 1 or 2;
    • (ii) one or more polyoxyalkylene diols;
    • (iii) one or more short chain perfluoroalkyl alcohols;
    • (iv) one or more isocyanate component selected from a polyisocyanate compound that has at least 3 isocyanate groups or a mixture of polyisocyanate compounds wherein the average number of isocyanate groups per molecule is more than 2;
    • (v) optionally one or more isocyanate blocking groups; and
    • (vi) optionally one or more co-reactants capable of reacting with an isocyanate group.
Also, a method of applying such composition to substrates, e.g., fibrous substrates.

Description

FIELD OF INVENTION[0001]The present invention relates to a fluorochemical composition for rendering fibrous substrates oil repellent, water repellent, and / or stain or soil repellent. Additionally, the invention also relates to a method of treating the fibrous substrate with the fluorochemical composition.BACKGROUND[0002]Compositions for making substrates, in particular fibrous substrates, such as textile, oil and water repellent have been long known in the art. When treating fibrous substrates and in particular textile such as apparel, it is desired that the textile retains its look and feel as much as possible. Therefore, the composition should normally not contain components that would affect the look of the product, i.e., the treatment should be substantially invisible to the unaided human eye. Also, the feel of the substrate should preferably be substantially unaffected. Typically this means that only low amounts of the solids of the composition can be applied. Accordingly, an o...

Claims

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Application Information

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IPC IPC(8): D06M15/53
CPCD06M13/17D06M15/53D06M13/217D06M13/213
Inventor MOREN, DEAN M.
Owner 3M INNOVATIVE PROPERTIES CO
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