Synthesis of PEG/TDI/F6 Adducts and Utilization as Water/Oil Repellents and Oily Stain Release Finishes for Cotton Fabric

Abstract

Four polyethylene glycol (PEG)=2,4-toluene diisocyante (TDI)= perfluorinated aliphatic alcohols mixture (F6) adducts were prepared by reacting equimolar ratios of PEG (300, 600, 1000, or 2000), TDI, and F6 at 90 C for 90 min. All adducts, except that based on PEG 300 were water dispersible. These dispersions were used as water=oil repellent and oily stain release finishes for cotton fabric, via incorporation in a finishing bath containing DMDHEU. Factors affecting finishing process, using an adduct based on PEG 1000, such as DMDHEU concentration (0-60 g=l), adduct concentration (10-40 g=l), curing time (1-5 min), and temperature (140-170 C) were studied. Optimal performance properties of treated fabric, namely wrinkle recovery angle (WRA), %N, water= oil and stain release ratings, tensile strength, and breaking extension, were obtained using a padding bath containing DMDHEU (50 g=l), the adduct (30 g=l), and MgCl 2 Á 6H 2 O 2 (5 g=l), drying at 100 C=5 min and curing at 160 C=3 min. The inclusion of hydrophilic PEG segments in the adduct structure weakens the hydrophobic effect of perfluorinted segments, where the water repellency rating does not exceed a ceiling of 50, under the conditions employed. However, the adduct has a dual activity, where it repels oily stain in air and releases them during washing. A comparison among performance properties of fabric treated with adducts based on PEG 600, 1000, and 2000, showed that the fabric properties are practically the same, with little drops in WRA, %N, and oil repellency rating upon increasing PEG molecular weight from 600 to 2000.

Synthesis of castor oil/PEG as textile softener

“…Moreover, using the PEG of molecular weight 2000 Da keeps the good state of the hybrid emulsion. Unfortunately, PEG 4000 impairs the homogeneity of the formed hybrid emulsion which may be related to increasing of the reaction medium viscosity that hinders the molecular collisions of the reactants and/or decreasing the hydroxyl groups number by increasing the PEG molecular weight, the matter that certainly reduces the extent of formation of PEG/CAO species responsible for emulsification of the CAO [5,38]. Table 6 shows the effect of incorporating of CAO/PEG1000 and CAO/PEG2000 hybrid emulsions in easy care finishing bathes of cotton fabric on performance properties of that fabric.…”

“…It is clear that increasing of PEG molecular weight from 300 to 1000 Da in the CAO/PEG hybrid synthesis reaction brings about a gradual improvement in emulsion state of the formed hybrids. It seems that increasing the PEG molecular weight, either reacted or unreacted, enhances the dispersing of the formed hybrids [5,38]. Moreover, using the PEG of molecular weight 2000 Da keeps the good state of the hybrid emulsion.…”

Surface Microphase Separation and Water-Induced Reconstruction of Fluorinated Amphiphilic Copolymer Coatings for Soil Release Fabrics

“…Indeed, low surface energy on water-/oil-repellent fabrics will reduce staining and also help reduce the use of detergent. , To meet this demand, some researchers have utilized fluorinated amphiphilic copolymers (FACs) as water/oil repellents and soil release finishes for fabrics. Abo-Shosha et al prepared four adducts as water repellents, oil repellents, and soil release finishing agents for cotton fabrics through the reaction of 2, 4-toluene diisocyanate, perfluorinated aliphatic alcohols, and poly­(ethylene glycol) with different molecular weights. Sun et al synthesized block copolymers of fluorinated acrylate and polyether acrylate, which can be used for finishing polyester fabrics to improve water/oil repellency and soil release performance.…”

Stearyl Alcohol/2,4-Toluene Diisocyanate/Perfluorinated Alcohols Adduct as a New Textile Water/Oil Repellent

“…Previous reports [11,12] from this division have utilized a fluorochemical building block (namely a mixture of perfluorinated alcohol, under the commercial name of F6 of 3M Co, USA), in the synthesis of either a painting additive that acquired treated metals anti-corrosion property or textile finishes that acquired fabrics water/oil repellency and oily stain release properties. The painting additive was synthesized [11] by reacting F6 with 2,4-toleunediisocyanate (TDI) at a molar ratio of 2/1, respectively; whereas the textile finishes were prepared [12] by reacting F6 with TDI and polyethylene glycol (having a molecular weight of 600, 1000, or 2000) at equal molar ratios.…”