Back to results
US 8,299,147 B2Granted
Chemical resistant ionomers and protective coverings
AssigneePerfect Defense Technology Co., Ltd.
InventorHuisheng Wu
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneePerfect Defense Technology Co., Ltd.
InventorHuisheng Wu
Estimating the term…
This invention relates to novel chemical resistant, film forming, and moisture vapor permeable ionomers, including specialized polyurethane ionomers, polyurea ionomers, polyamide ionomers, polyester ionomers, or a mixture of the said ionomers, having high content of covalent-bonded ionic groups, total >100 milli-equivalents per 100 gram of ionomers. These specialized ionomers have low noxious chemical crossover rate, high moisture vapor transmission rate, hydrolytically stable in humid environment, and capable of forming thin films. These novel chemical resistant ionomers can be cationic (selected from tertiary amines and their derivatives or quaternary ammoniums), anionic (selected from aliphatic carboxylic acids and their derivatives or aliphatic sulfonic acids and their derivatives), or zwitterions (selected from ionomers or a mixture of ionomers containing both cations and anions groups), or a mixture of any combination of the above three types, preferably in a form of coating solutions or dispersions suitable for coatings to form thin films or membranes, to protect the coated surface with acceptable barrier properties at any humidity with high moisture vapor permeability. One major application is in the field of protective fabric and protective clothing, gloves, shoes, hats, tents, sleeping bags, and protective skin cream against noxious liquids and gases.
A film comprising ionomers selected from the group consisting of polyurethane ionomers, polyurea ionomers, polyamide ionomers, polyester ionomers, or a mixture thereof wherein the ionomers comprise high content of covalent-bonded ionic groups of cationic, anionic, zwitterionic, or a mixture thereof, wherein the film comprises >100 milli-equivalents per 100 gram of ionomers, and <1 mole % of soft hydrocarbon polymers that have glass transition temperature lower than 25° C., wherein the soft hydrocarbon polymers are selected from a group consisting of polyalkylene oxide, polyethers, polyalkylene glycols, polyetherpolyesters and polyalkylenimine, wherein the film is moisture vapor permeable and chemical resistant to 2-chloroethyl ether with accumulated permeation rate of <25 microgram/cm2/day.
A chemical protective coating solution or dispersion wherein the coating is chemical resistant to 2-chloroethyl ether with accumulated permeation rate of <25 microgram/cm2/day and moisture vapor permeable thin layer of films or membranes, comprising ionomers of polyurethane ionomers, polyurea ionomers, polyamide ionomers, polyester ionomers, or a mixture thereof, containing high content of covalent-bonded ionic groups of cationic, anionic, zwitterionic, or a mixture thereof, having a total of >100 milli-equivalents per 100 gram of ionomers, and comprising <1 mole % of soft hydrocarbon polymers that have glass transition temperature of lower than 25° C., wherein the soft hydrocarbon polymers comprise polyalkylene oxide, polyethers, polyalkylene glycols, polyetherpolyesters or polyalkylenimine.
Dependencies are inferred from the claim text.