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US 7,879,743 B2Granted
Stain and soil resistant textile article
AssigneeBigSky Technologies LLC
InventorsJoseph F. Bringley, Tiecheng Qiao, Suresh Sunderrajan
Life of this patent
Estimating the term…
Abstract
Disclosed in this specification is an aqueous dispersion for treating a textile. The dispersion generally includes surface-functionalized inorganic oxides in combination with a fluorochemical. Significantly lower concentrations of fluorochemicals are present in comparison to prior art dispersions.
Claims23
A treated textile comprising:
- a textile substrate treated with an aqueous dispersion of surface treated particles and a fluorochemical, said treated textile substrate exhibiting oil repellency, water repellency and having a fluorine concentration, by weight of treated fabric, of between about 20 and 500 ppm, wherein said fluorochemical coating is chemically bound to the surface of inorganic particles and said surface of said inorganic particles has been surface modified with an agent chosen from the group of surface modifying agents consisting of silane coupling agents and hydrolyzed precursors of silane coupling agents.
An aqueous dispersion, for treating surfaces in order to impart water repellency and oil repellency, comprising
- surface functionalized inorganic particles, comprising
- metal oxide particles, ranging in size between 2 to 500 nm, that have been surface functionalized with a surface functionalizing agent, and are stably suspended in an aqueous medium;
- and
- a fluorochemical that is chemically bound to the surface of said functionalized particles and exhibits a concentration in the aqueous dispersion of at least about 80 parts by weight of surface functionalized inorganic particles per 100 parts by weight of fluorochemical compound.
1 more element
An aqueous dispersion, for treating surfaces in order to impart water repellency and oil repellency, comprising:
- surface functionalized inorganic particles, comprising
- metal oxide particles, ranging in size between 2 to 500 nm, that have been surface functionalized with a surface functionalizing agent, are stably suspended in an aqueous medium, wherein said surface functionalizing agent is selected from cationic inorganic sols of aluminum and zirconium, and
- a fluorochemical that is chemically bound to the surface of said functionalized particles, and exhibits a concentration in the aqueous dispersion of at least about 80 parts by weight of surface functionalized inorganic particles per 100 parts by weight of fluorochemical compound.
An aqueous dispersion, for treating surfaces in order to impart water repellency and oil repellency, comprising:
- surface functionalized inorganic particles, comprising
- metal oxide particles, ranging in size between 2 to 500 nm, that have been surface functionalized with a surface functionalizing agent, are stably suspended in an aqueous medium;
- a fluorochemical that is chemically bound to the surface of said functionalized inorganic particles, and exhibits a concentration in the aqueous dispersion of at least about 80 parts by weight of surface functionalized inorganic particles per 100 parts by weight of fluorochemical compound;
- and
- wherein said surface functionalized inorganic particles have been functionalized with polymers and said polymers are amine containing polymers chosen from the group of polymers consisting of polyethylenimine, polyallylamines, polyamides, and siloxane polymers having amine or amide functionalities.
2 more elements
An aqueous dispersion, for treating surfaces in order to impart water repellency and oil repellency, comprising:
- surface functionalized inorganic particles, comprising
- metal oxide particles, ranging in size between 2 to 500 nm, that have been surface functionalized with a surface functionalizing agent, are stably suspended in an aqueous medium, wherein said surface functionalized inorganic particles have been functionalized with silane coupling agents, or hydrolyzed precursors of silane coupling agents having the general formula:
- RaR′bSi(OR″)4−(a+b);
- where a and b are integers from 1 to 3, (a+b) is less than or equal to 3, R and R′ are organic groups having from 1-30 carbon atoms and R″ is H, or an organic group having from 1 to 6 carbon atoms;
- and
- a fluorochemical that is chemically bound to the surface of said functionalized particles, and exhibits a concentration in the aqueous dispersion of at least about 80 parts by weight of surface functionalized inorganic particles per 100 parts by weight of fluorochemical compound.
3 more elements
An aqueous dispersion, for treating surfaces in order to impart water repellency and oil repellency, comprising:
- surface functionalized inorganic particles, comprising
- metal oxide particles, ranging in size between 2 to 500 nm, that have been surface functionalized with a surface functionalizing agent, are stably suspended in an aqueous medium, wherein said surface functionalized inorganic particles have been functionalized with silane coupling agents, or hydrolyzed precursors of silane coupling agents having the general formula:
- RaSi(X)4−a;
- where a is an integer from 1 to 3, R is an organic group having from 1-30 carbon atoms and X is a halogen, Cl, Br or I;
- and
- a fluorochemical that is chemically bound to the surface of said functionalized particles, and exhibits a concentration in the aqueous dispersion of at least about 80 parts by weight of surface functionalized inorganic particles per 100 parts by weight of fluorochemical compound.
3 more elements
An aqueous dispersion for treating surfaces in order to impart water repellency and oil repellency comprising
- surface functionalized inorganic particles, comprising
- metal oxide particles, ranging in size between 2 to 500 nm, that have been surface functionalized with a surface functionalizing agent, are stably suspended in an aqueous medium;
- and
- a fluorochemical that is chemically bound to the surface of said functionalized particles,
- wherein the dispersion has a viscosity of less than 1000 cP, a solids concentration of greater than 5% and a mean particle diameter of less than 100 nm.
2 more elements
An aqueous dispersion, for treating surfaces in order to impart water repellency and oil repellency, comprising
- surface functionalized inorganic particles, comprising
- metal oxide particles, ranging in size between 2 to 500 nm, that have been surface functionalized with a surface functionalizing agent, are stably suspended in an aqueous medium, wherein said surface functionalized inorganic particles are functionalized with silane coupling agents;
- and
- a fluorochemical that is chemically bound to the surface of said functionalized particles, and exhibits a concentration in the aqueous dispersion of at least about 80 parts by weight of surface functionalized inorganic particles per 100 parts by weight of fluorochemical compound.
1 more element
An aqueous dispersion, for treating surfaces in order to impart water repellency and oil repellency, comprising
- surface functionalized inorganic particles, comprising
- metal oxide particles, ranging in size between 2 to 500 nm, that have been surface functionalized with a surface functionalizing agent, are stably suspended in an aqueous medium, wherein said surface functionalized inorganic particles are functionalized with silane coupling agents;
- a fluorochemical that is chemically bound to the surface of said functionalized particles, and exhibits a concentration in the aqueous dispersion of at least about 80 parts by weight of surface functionalized inorganic particles per 100 parts by weight of fluorochemical compound;
- and
- the aqueous dispersion is applied to treat a textile substrate.
2 more elements
A method for treating textiles to impart stain resistance, comprising:
- a. providing a textile substrate;
- b. contacting said substrate with a stable aqueous dispersion of surface-functionalized particles and a fluorochemical to produce a treated textile substrate, wherein the flammability of the treated textile substrate exhibits an oil repellency of 4 or greater, a water repellency of 4 or greater, and a fluorine concentration, by weight of treated fabric, of between about 20 and 900 ppm;
- and
- functionalizing the surface functionalized particles with silane coupling agents, or hydrolyzed precursors of silane coupling agents.
1 more element
Dependencies are inferred from the claim text.