Functionalized textile compositions and articles
Patent no: WO2021/119371
Date of publication: 2021-06-17
Applicant(s): NELUMBO, AMERICAN SAPHIRE
Inventor: BROCKWAY LANCE R, WALTHER DAVID C, RAFSHOON JOSH
Functionalized textile materials are provided. At least a portion of a textile surface in includes a ceramic material, such as a binderless porous structured ceramic, and optionally, one or more functional layer is applied, resulting in a textile material with one or more desirable functional properties, such as hydrophilicity, hydrophobicity, flame retardancy, photocatalysis, anti-fouling, and/or deodorant properties.
Process for removing perfluoroalkyl substances from water containing them
Patent no: WO2021/239771
Date of publication: 2021-12-02
Applicant(s): VEZZANI MASSIMO
Inventor: ZHOU ZHANG-LIN, BRANDSTEIN, YANG QIANHAN
A process for the reduction of the concentration of perfluoroalkyl substances (PFAS) in water containing them, comprising a step of percolating water through a layer (2) of a polymeric material in subdivided form containing electropositive functional groups; the polymeric material in subdivided form consists of, for example, a melamine resin or a polyurethane resin.
Methods of forming a continuous layer of an aqueous coating on the surface of a paper-based product and oil-resistant food packaging
Patent no: US20210040693
Date of publication: 2021-02-11
Applicant(s): US DEPARTMENT OF AGRICULTURE
Inventor: GLENN GREGORY M, KLAMCZYNSKI ARTUR P, JIN XING
Disclosed are methods that facilitate formation of a continuous layer of aqueous coating on the surface of paper-based products via appropriate hydrophobicity on the to-be-coated surface. The methods are applied to provide useful characteristics or functions to paper products, for example, good oil resistance. The methods do not involve the use of polyfluoroalkyl substances (PFAS). Also disclosed are articles of manufacture produced using these methods.
Water repellent composition, kit, water repellent fiber product and method for manufacturing same
Patent no: WO2021/246475
Date of publication: 2021-12-09
Applicant(s): MEISEI KAGAKU KOGYO
Inventor: MATSUMURA Tatsuya, Naoki Omichi, NISHIMURA, Hiroshi, HASHIMOTO TAKASHI
Provided is a water repellent composition having good chalk mark resistance. The water repellent composition comprises at least a reaction product (AB) of a polyol compound (A) with a polyisocyanate compound (B) and a water repellency-imparting compound (C). In the water repellent composition: the polyol compound (A) comprises a polyol compound (A1) that has one or more functional groups of at least one kind selected from the group consisting of an ether group, a carbonate group and an ester group and/or a polyol compound (A2) that has none of the aforesaid functional groups; the reaction product (AB) has an isocyanate group; when the polyol compound (A) comprises the polyol compound (A2) alone in the reaction product (AB), the ratio by mole (B/A2) of the isocyanate group in the polyisocyanate compound (B) to the hydroxyl group in the polyol compound (A2) is 2.1 or more; the water repellency-imparting compound (C) has no perfluoroalkyl group having 7 or more carbon atoms; and the ratio by mass (AB/C) of the reaction product (AB) to the water repellency-imparting compound (C) is 0.05 or more.
Water-repellent structure, manufacturing method therefor, and water-repellent coating agent employed in same
Patent no: WO2021/157449
Date of publication: 2021-08-12
Applicant(s): BANDO CHEMICAL INDUSTRIES
Inventor: ONISHI, Jun, MITA HIROSHI
A water-repellent structure includes a substrate and a water-repellent layer provided on a surface thereof. The water-repellent layer contains water-repellent particles and filler particles, the average particle size of which is at least twenty times greater than that of the water-repellent particles.
Non-fluorinated copolymer composition and oil-resistant agent for paper
Patent no: WO2021/187442
Date of publication: 2021-09-23
Applicant(s): DAIKIN INDUSTRIES
Inventor: MATSUDA, Michio, SAKASHITA HIROTOSHI, UEHARA, Tetsuya, NOGUCHI DAISUKE
Provided is a non-fluorinated copolymer composition comprising (1) a non-fluorinated copolymer and (2) acetylene alcohol. The non-fluorinated copolymer (1) preferably contains no styrene skeleton. The non-fluorinated copolymer (1) preferably has (a) repeating units which are formed from an acrylic monomer that has a long-chain hydrocarbon group having 7 to 40 carbon atoms. In addition, the non-fluorinated copolymer (1) preferably has (b) repeating units which are formed from an acrylic monomer that has a hydrophilic group. The non-fluorinated copolymer composition exhibits little foaming during processing and can impart excellent oil resistance and water resistance to a base material.
Biodegradable oil-proof paper without fluorocarbon compound, and preparation method therefore
Patent no: WO2021/179306
Date of publication: 2021-09-16
Applicant(s): ZHEJIANG JINJIAHAO GREEN NANOMATERIAL
Inventor: TONG SHUHUA, HUA FEIGUO, ZHANG YU, TONG LI, MENG YU, NI YONGHAO, HE ZHIBIN
The present invention relates to a biodegradable oil-proof paper without a fluorocarbon compound, and a preparation method therefor. The method comprises: first pre-coating cellulose base paper with a modified starch reinforced pre-coating layer, drying same, and then applying a prepared nanocellulose/polyvinyl alcohol (PVA) oil-proof layer. By means of the present invention, the problem of PVA permeation in the process of applying an oil-resistant layer using PVA as a main component is alleviated by means of the interaction between the nanocellulose and the cationic compound in the reinforced pre-coating layer, and the effect of enhancing the oil resistance of PVA in the coating is achieved, so that the oil permeation resistance of the oil-resistant layer is greatly improved; the present invention does not contain any fluorocarbon additive and is environment-friendly, has no toxic effect on the human body, and can be used as oil-proof paper for various purposes.
Method for producing a textile article with hydrophobised textile surface using plasma treatment and wet chemical processing
Patent no: EP3460021
Date of publication: 2017-11-23
Applicant(s): HOTHOUSE MEDICAL
Inventor: MEISEI CHEMICAL WORKS
The present invention addresses the problem of providing a fluorine-free water repellent which can impart excellent initial water repellency and laundering-resistant water repellency to fibers of a wide range of kinds. The water repellent treatment agent is an aqueous emulsion which contains no fluorine-containing ingredient and comprises a hybrid emulsion that contains a water repellent component and a crosslinking component capable of reacting with the water repellent component, the two components being included in each particle. It is preferable that the crosslinking component be a blocked isocyanate. It is preferable that the water repellent component and the crosslinking component be contained in amounts of 20-90 mass% and 10-80 mass%, respectively, based on the solid components of the water repellent treatment agent.