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US 6,607,564 B2Granted
Modified textiles and other materials and methods for their preparation
AssigneeNano-Tex, LLC
InventorsDavid S. Soane, David A. Offord
Life of this patent
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AssigneeNano-Tex, LLC
InventorsDavid S. Soane, David A. Offord
Estimating the term…
Provided are compounds and methods for modifying a material to change properties of the material, as well as a variety of products obtained using the methods. In one embodiment, a material comprising one or more modifiable functional groups is reacted with an activated hydrophobic acyl group in the presence of a hindered base, thereby to covalently attach the hydrophobic acyl group to the modifiable functional groups on the material. The material which is modified may be, for example, a carbohydrate, and the modifiable functional groups on the material may be hydroxyls. For example, materials such as cellulose may be modified by reacting it with a acid chloride or acid anhydride including a hydrophobic acyl group, in the presence of a hindered base, such as tripentylamine, to attach the hydrophobic acyl groups to the hydroxyls on the cellulose, thereby to increase the hydrophobicity of the cellulose. The methods and compounds disclosed herein may be used to modify materials to improve properties such as resistance, grease repellency, soil resistance and permanent press properties.
A method of modifying a proteinaceous material to increase its hydrophobicity, the method comprising reacting said material comprising one or more modifiable functional groups with an activated hydrophobic acyl group, selected from the group consisting of acyl chlorides and acyl anhydrides, in the presence of a hindered base, thereby to covalently attach the hydrophobic acyl group to the modifiable functional groups on the proteinaceous material, to increase the hydrophobicity of the material.
A method of modifying a material to increase its hydrophobicity, the method comprising reacting said material comprising one or more modifiable functional groups with an activated hydrophobic acyl group, selected from the group consisting of an acid chloride of the formula R(CH2)2COCl or an acid anhydride of the formula (R(CH2)2CO)2O, wherein R is a branched, cyclic or straight chain C1-C12 fluorocarbon, in the presence of a hindered base, thereby to covalently attach the hydrophobic acyl group to the modifiable functional groups on the material, to increase the hydrophobicity of the material.
A method of modifying a material to increase its hydrophobicity, the method comprising reacting said material comprising one or more modifiable functional groups with an activated hydrophobic acyl group, selected from the group consisting of polyethylene acid chlorides, in the presence of a hindered base, thereby to covalently attach the hydrophobic acyl group to the modifiable functional groups on the material, to increase the hydrophobicity of the material.
A method of modifying a material to increase its hydrophobicity, the method comprising reacting said material comprising one or more modifiable functional groups with an activated hydrophobic acyl group in the presence of a hindered base, thereby to covalently attach the hydrophobic acyl group to the modifiable functional groups on the material, to increase the hydrophobicity of the material, and wherein the activated hydrophobic acyl group is an acid chloride selected from the group consisting of:
A method of modifying a material to increase its hydrophobicity, the method comprising reacting said material comprising one or more modifiable functional groups with an activated hydrophobic acyl group in the presence of a hindered amine base having the formula R1R2R3N, wherein each of R1, R2 and R3 is independently a branched or straight chain saturated or unsaturated hydrocarbon of at least three carbons;
Dependencies are inferred from the claim text.