Abstract:
The compound is a silane surface treatment agent and is useful for modifying the surfaces of silicon oxide and other metal oxides with hexafluorodimethyl carbinol functional groups. Additionally provided is a surface treatment procedure that effectively bonds it and other alkoxysilanes via homogeneous and heterogeneous amine catalysis onto metal oxide surfaces.
Abstract:
The compound is a silane surface treatment agent and is useful for modifying the surfaces of silicon oxide and other metal oxides with hexafluorodimethyl carbinol functional groups. Additionally provided is a surface treatment procedure that effectively bonds it and other alkoxysilanes via homogeneous and heterogeneous amine catalysis onto metal oxide surfaces.
Abstract:
A fluoropolymer-base, water- and oil-repellent composition of an aqueous dispersion type, prepared by dispersing a polymer comprising an ethylenically unsaturated monomer having a perfluoroalkyl group in an aqueous medium, which composition contains a nonionic surfactant having an HLB value of 11 or below and a cationic surfactant, with at least one of the constituent monomers of the polymer being one forming a homopolymer having Tg of 50°C or below. The composition is excellent in the water- and oil-repellency given by low-temperature curing.
Abstract:
An improved perfluoropolymer composite that uses a blend of a perfluoropolymer (such as PTFE) and a silicone polymer. By coating a substrate, such as glass fiber fabric, with a blend of a perfluoropolymer and a silicone polymer, an adhesive layer can be bonded either directly to the surface of the perfluoropolymer composite or to a perfluoropolymer composite that has been primed without the need to have otherwise treated the perfluoropolymer surface, such as either by etching or by the deposition of an intermediate coating containing colloidal silica or other similar agents, to make the surface bondable.
Abstract:
Die Erfindung betrifft R- E- und/oder ECR- Glasfasern, die eine Schlichte mit zumindest einem Mehrkomponenten-Filmbildner, einem Gleitmittel und einem Haftvermittler enthält.
Abstract:
The present invention provides a method of coating a substrate having a surface defined by a layer of fluoropolymer. The method utilizes an aqueous dispersion that includes: particles of melt-processible fluoropolymer in an amount of 30 to 70% by weight; a fluorinated surfactant in an amount of not more than 250ppm based on fluoropolymer solids of the aqueous dispersion; and a non-ionic surfactant comprising an ethoxylated aliphatic alcohol in an amount of 2 to 15% by weight based on total solids of the aqueous dispersion. The aqueous dispersion is free or substantially free of aromatic group containing non-ionic surfactants. The aqueous dispersion may be optionally diluted and/or modified with additional components to obtain a coating composition. The coating composition may then be applied on at least part of the surface of the substrate to define the fluoropolymer layer.
Abstract:
A bicomponent fiber is disclosed, in addition to systems and processes for making the bicomponent fiber. The bicomponent fiber can include a glass core and a polytetrafluoroethylene (PTFE) sheath circumferentially enclosing the glass core, wherein the bicomponent fiber has a diameter between approximately five micrometers and approximately twenty micrometers.
Abstract:
The present invention pertains to a process for manufacturing a fluoropolymer composite, said process comprising the following sequential steps: (i) providing an aqueous latex comprising from 10% to 40% by weight, preferably from 15% to 35% by weight of at least one fluoropolymer comprising recurring units derived from vinylidene fluoride (VDF) [polymer (VDF)]; (ii) up-concentrating the aqueous latex provided in step (i) thereby providing an up-concentrated aqueous latex comprising from 45% to 60% by weight, preferably from 45% to 55% by weight of at least one polymer (VDF); (iii) contacting one continuous fibre or a bunch of continuous fibres with the up-concentrated aqueous latex provided in step (ii); (iv) squeezing the impregnated fibrous material provided in step (iii); (v) drying the squeezed fibrous material provided in step (iv), typically at a temperature comprised between 100°C and 120°C; (vi) baking the dried fibrous material provided in step (v) at a temperature comprised between 190°C and 240°C; (vii) cooling the coated fibrous material provided in step (vi), preferably to a temperature of about 20°C; (viii) optionally, contacting the coated fibrous material provided in step (vii) with the up-concentrated aqueous latex provided in step (ii) and submitting the impregnated fibrous material so provided to sequential steps (iv) to (vii); and (ix) optionally, repeating step (viii) one or more times. The present invention also pertains to the fluoropolymer composite thereby provided and to uses of said fluoropolymer composite in various applications.
Abstract:
본 발명은 고강도 직물의 발수처리 방법에 관한 것으로서, 고강도 직물을 발수제 조성물 내에 디핑(Dipping)시켜 고강도 직물내에 발수제 조성물을 함침시킨 후 건조 및 열처리 하기 전에 공기흡입장치(Air suction machine)로 고강도 직물내에 함침된 발수제 조성물중 일부를 제거(Pick-up)해 주는 것을 특징으로 한다. 본 발명은 디핑(Dipping) 공정에서 고강도 직물내에 함침된 발수제 조성물 중 일부를 균일하게 제거(Pick-up)할 수 있어서 발수성능, 특히 초기 발수성은 물론 마찰후의 발수성도 향상시킬 수 있고, 발수처리 중 고강도 원단에 주름이 발생되는 것을 효과적으로 방지한다. 본 발명으로 발수처리된 고강도 직물은 주름이 없고 유연성이 증가되어 착용감이 증진되고, 방탄복용 원단으로 사용시에는 발수성이 증가되어 수분 흡수에 따른 방탄특성 저하를 방지한다.