Cambridge, MA, United States
Cambridge, MA, United States

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Patent
GVD Corporation | Date: 2014-04-29

Liquid-impregnated textured coatings containing one or more materials on a variety of surfaces are described herein. The coatings can be prepared by chemical vapor deposition techniques or other techniques known in the art. The texture can be random, fractal, or patterned. The texture can be pores, cavities, and/or micro- and/or nanoscale features/structures. The capillary forces arising from the nano- or microscopic texture of the coating stabilizes the liquid within the textured features and at the surface of the coating resulting in non-wetting properties for a variety of surfaces. They coatings may be formed in a single layer or as multiple layers. In order to maximize ease of deposition and processing, the coating may be formed of graded composition to optimize both bulk and surface properties without the need for multiple coatings.


Patent
GVD Corporation | Date: 2016-06-17

Coated articles and methods and systems for coating the articles are described herein. The methods and systems described herein include, but are not limited to, steps for actively or passively controlling the temperature during the coating process, steps for providing intimate contact between the substrate and the support holding the substrate in order to maximize energy transfer, and/or steps for preparing gradient coatings. Methods for depositing high molecular weight polymeric coatings, end-capped polymer coatings, coatings covalently bonded to the substrate or one another, metallic coatings, and/or multilayer coatings are also disclosed. Deposition of coatings can be accelerated and/or improved by applying an electrical potential and/or through the use of inert gases.


Patent
GVD Corporation | Date: 2014-07-25

Molds that have coated mold surfaces, as well as methods and components associated with such molds, are provided. The mold surface coatings may be formed of a polymeric material, such as polytetrafluoroethylene (PTFE), and may be very thin (e.g., 50 microns or less). The coatings may facilitate the release of articles formed in the mold and may also reduce, or eliminate, the build up of contaminants on mold surfaces during processing which, thus, increases mold lifetime. The coatings may be formed in a chemical vapor deposition process with process conditions selected to enable formation of uniform, conformal coatings, even on mold features having small dimensions and/or high aspect ratios. The coatings are particularly well suited to be used in connection with rubber tires molds, though also can be used in other types of molds and articles.


Patent
GVD Corporation | Date: 2014-11-20

Coated articles and methods and systems for coating the articles are described herein. The methods and systems described herein include, but are not limited to, steps for actively or passively controlling the temperature during the coating process, steps for providing intimate contact between the substrate and the support holding the substrate in order to maximize energy transfer, and/or steps for preparing gradient coatings. Methods for depositing high molecular weight polymeric coatings, end-capped polymer coatings, coatings covalently bonded to the substrate or one another, metallic coatings, and/or multilayer coatings are also disclosed. Deposition of coatings can be accelerated and/or improved by applying an electrical potential and/or through the use of inert gases.


Grant
Agency: Department of Energy | Branch: | Program: SBIR | Phase: Phase II | Award Amount: 998.83K | Year: 2015

There is a need to reduce the cost and improve the reliability of hydrogen fuel cell electric vehicles (FCEVs) and their supporting infrastructure to enable FCEV competitiveness. Many reliability problems stem from plastic and elastomer seals employed in hydrogen systems that leak and degrade as a result of the extreme temperature and high pressure hydrogen environments. There is a critical need for improved materials are needed that can enable seals to operate reliably at both extreme temperatures (-40T200C) and high hydrogen pressures (>875 bar). GVD Corporation proposes to utilize hydrogen gas barrier coatings deposited on such seals to shield them from hydrogen permeation and enable reliable, long-term operation. These barrier coatings are based on GVDs novel thin film vapor deposition technology. In GVDs process an inorganic-organic multilayer barrier coatings are fabricated from the vapor-phase and is grown directly on the surface of the elastomer seal. The coating deposits uniformly and conformally over three-dimensional seals and gaskets. Further these coatings are highly flexible and stable at 200C. In Phase I, GVD demonstrated technical feasibility of the concept by depositing flexible, well adhered barrier coating stacks on elastomeric substrates. These coatings survived temperatures up to 200oC while reducing permeability to helium by >50% (equivalent to a 70-90% reduction in hydrogen permeability). During Phase II, GVD will optimize these materials for ease of manufacturing. Demonstration of resistance to high-pressure hydrogen permeability will be shown directly. The deposition process will be scaled up and a production tool designed to handle significant product volumes. In addition, prototype seals will be coated and tested at the bench level by a hydrogen compressor manufacturer and in the field by an industrial user of FCEVs. GVD has also already secured commitment from a commercial partner to bring this technology to market through an existing sales and marketing agreement. Commercial Applications and other Benefits. FCEVs have the potential to significantly reduce US dependence on foreign oil and lower harmful emissions that contribute to climate change. Successful commercialization of GVD barrier coatings for polymer seals will help improve reliability and reduce cost of hydrogen systems employed in FCEVs and their supporting infrastructure. GVD barrier-coated seals developed during this project may also be useful for equipment used in the oil and gas industry and for organic electronic devices such as organic light emitting diodes (OLEDs) and organic photovoltaics (OPVs).


Grant
Agency: Environmental Protection Agency | Branch: | Program: SBIR | Phase: Phase II | Award Amount: 290.01K | Year: 2013

GVD proposed to develop high performance, VOC-free and PFOA-free, non-stick mold release coating based on its novel PTFE (Polytetraflouroethylene) fluoropolymer technology. Most commercial mold release agents make use of organic solvents and vaporize during drying, creating a significant air quality impact. Even water-based formulations often require the use of fluorinated surfactant additives to stay suspended in the liquid. These surfactants such as PFOA (perfluorooctanoic acid) have been shown to be exceptionally pervasive in the environment, and are biopersistent and carcinogenic. Drying and curing processes of wet applied releases are also energy intensive, requiring consumption of fossil fuels and the attendant emission of greenhouse gases. The environmental problems associated with these mold release agents and tighter regulations imposed on their use are generating urgency among manufacturers to identify green alternative release agents with the same level of performance. GVD’s green polytetrafluoroethylene (PTFE) coatings offer such an alternative. PTFE offers an unparalleled combination of low surface energy (anti-stick), chemical resistance, and thermal stability. GVD produces thin, conformal, environmental-benign PTFE coatings at low temperature via the innovative initiated Chemical Vapor Deposition (iCVD) process. In this solvent-free process, GVD creates the pure PTFE fluoropolymer from reactive precursor vapors and deposits the PTFE as a uniform coating at the same time. Using iCVD, GVD and optimize PTFE’s surface energy, adhesion, and durability during deposition. GVD’s iCVD deposition process has zero hazardous emissions. There are a wide variety of markets and application for GVD’s mold release coating, including seals and gaskets, foam, automotive parts, composite part molding, and medical products. With improved adhesion and durability, GVD will be able to access more of these applications. In Phase I, GVD achieved the goals of improved adhesion and durability of our PTFE coatings for mold release applications. Bench scale testing showed that changes to the PTFE coating recipe improved coating adhesion with even greater improvement upon addition of and adhesion promoter. Initial molding tests with uncured molding materials, a challenging condition, demonstrated that the advances made during Phase I resulted in significant improvements to mold release durability. GVD’s coatings also outperformed wet-applied mold release coatings in the molding test. In this Phase II proposal, GVD will test these formulations at industrial scale with global leaders in tire and automotive manufacturing. At the end of this work GVD will deliver a widely applicable, commercial solution to the issue of toxic, polluting, and low-performance mold release agents.


Grant
Agency: Department of Health and Human Services | Branch: | Program: SBIR | Phase: Phase I | Award Amount: 149.58K | Year: 2014

DESCRIPTION (provided by applicant): Prefilled syringes are used with increasing frequency in parenteral drug administration. Their advantages include reducing medical errors, ease of use, accurate dosage, elimination of preservatives, and enabling of patient-controlled self-therapy. However, most commercial protein-based drugs are not compatible with prefilled syringes. This is because of complications that arise from the almost ubiquitous presence of silicone oil that is used as lubricant to aid in syringe plunger depression and to ensure reliable and safe operation. Silicone microdroplets that shed from the lubricated surfaces of the syringe react with the drug medium and cause aggregation of protein therapeutics compromising their safety and efficacy. Attempts to replace standard silicone oil lubricant in prefilled syringes have thus far fallen short in achieving sufficiently high lubricity and chemical inertness. To address this problem GVD Corporation proposes to develop a highly inert, low- parti


Grant
Agency: Department of Defense | Branch: Missile Defense Agency | Program: SBIR | Phase: Phase I | Award Amount: 124.99K | Year: 2015

There is an urgent need for improved coating methods that increase protection while not impacting the weight and thermal performance of electronic boards. Current protective coatings are too thick and heavy, and prevent adequate heat dissipation of underlying electronics. To address this need, GVD Corporation and its team proposes to develop an ultra-thin, highly conformal coating. This coating will also provide improved environmental protection. Approved for Public Release 14-MDA-8047 (14 Nov 14)


Grant
Agency: Department of Defense | Branch: Navy | Program: SBIR | Phase: Phase I | Award Amount: 79.75K | Year: 2014

GVD and its partners propose to develop an active anti-tamper conformal coating based on GVD"s proprietary polymer thin film vapor deposition technology. There is an immediate need to for improved anti-tamper (AT) technologies to protect critical program information (CPI) found in the software of weapon systems used by the US Military and its allies. Current state-of-the-art AT coatings applied to circuit boards containing CPI do not protect from electrical probing attacks and do not offer adequate heat dissipation of a board"s powered electronics. GVD offers polymer coatings that are grown directly on the surface of a circuit board from the vapor phase at low temperature without use of solvents and without the need for post-deposition drying or curing. Because GVD coatings are ultra-thin (typical thickness range is from 50nm to 5µm) they do not significantly inhibit heat dissipation from electronics. GVD will use its process to design a coating architecture that meets all requirements by combining coatings of various functionalities. In Phase I, we will demonstrate material properties needed to achieve the targeted anti-tamper functionality. This will include the ability to counter both direct probing measures as well as non-invasive attacks. We will also demonstrate the feasibility of GVD"s AT concept through analytical modeling and materials testing. Finally, we will develop a plan for risk reduction for further development, prototyping, and scale-up to be carried-out during Phase II.


Patent
GVD Corporation | Date: 2014-01-17

Medical articles with coatings are disclosed herein, as well as methods and systems for depositing these coatings onto medical articles. Surfaces of such articles may be coated. The coating(s) may serve as lubricants for reducing suction between such surfaces or between a coated surface and another surface.

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