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    Graphene-cyclodextrin complex and its use in corrosion prevention
    4.
    发明授权
    Graphene-cyclodextrin complex and its use in corrosion prevention 有权

    公开(公告)号：US11414551B2

    公开(公告)日：2022-08-16

    申请号：US16717484

    申请日：2019-12-17

    申请人： KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS

    发明人： Rami Khalid Suleiman ,  Tawfik Abdo Saleh

    IPC分类号： C09D5/08 ,  C08B3/12 ,  B05D1/02 ,  B05D3/12 ,  B05D7/00 ,  B05D7/14 ,  B05D7/24 ,  C01B32/194 ,  C08B37/16

    摘要： A complex of beta-cyclodextrin and graphene (CD-G) and a method of use of the complex in corrosion protection of the metal surfaces exposed to high saline concentrations. Composite laminates comprise CD-G, zinc (optionally magnesium) powder embedded in a resin matrix and adjacent to the metal, followed by polyurethane comprising a polymeric zinc chelator, followed by a hermetic sealant layer and finally by a hydrophobic self-cleaning fouling release layer as a topcoat. Optional managed stress of the laminated layers by temperature swings and mechanical vibration ensures resolution of local strain at the formative stage and not during functioning, producing defects that are healed during deposition of the next layer. More than 99% of the zinc and other toxic ions extracted from the metal and coating are intercepted by the selective chelator layer insulated under the sealer and fouling-release layers.

    Metal oxide-containing sol-gel coating formulations
    5.
    发明授权
    Metal oxide-containing sol-gel coating formulations 有权

    公开(公告)号：US11479692B2

    公开(公告)日：2022-10-25

    申请号：US16142483

    申请日：2018-09-26

    申请人： KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS

    发明人： Rami Khalid Suleiman ,  Bassam El Ali ,  Ahmad Sorour

    IPC分类号： C09D5/08 ,  C09D183/08 ,  C09D7/61 ,  C09D183/04 ,  C08G77/16 ,  C08K3/22

    摘要： Sol-gel coating formulations including metal oxide particles such as aluminum oxide, calcium oxide, zinc oxide, magnesium oxide, and molybdenum oxide embedded in a hybrid polymer matrix based on a reacted form of a resin composition containing a tetraalkylorthosilicate, an aminoalkylsilane, a dialkoxysilane, and a silanol terminated polydimethylsiloxane. The sol-gel coating formulations are suitable for applications such as anticorrosive protective coatings of metal substrates (e.g. mild steel). These anticorrosive coated metal substrates are evaluated on their hydrophobicity (water contact angle), surface roughness, mechanical strength (e.g. hardness), adhesiveness to the substrate (e.g. critical load), and anticorrosiveness upon exposure to a saline solution (e.g. impedance value).

    Epoxy composite resins and sol-gel compositions thereof
    9.
    发明授权
    Epoxy composite resins and sol-gel compositions thereof 有权

    公开(公告)号：US09873759B2

    公开(公告)日：2018-01-23

    申请号：US14951123

    申请日：2015-11-24

    申请人： KING FAHD UNIVERSITY OF PETROLEUM AND MINERALS

    发明人： Rami Khalid Suleiman ,  Bassam Mohammad El Ali

    IPC分类号： C08G18/64 ,  C08G18/75 ,  C09D175/04

    CPC分类号： C08G18/6407 ,  C08G18/6469 ,  C08G18/755 ,  C08G2150/90 ,  C09D175/04

    摘要： Composite resins produced from chemical reactions among a polyglycol epoxide liquid epoxy resin, an aminosilane, tri- and/or tetra-alkoxysilanes and an isocyanate. The hybrid compositions are prepared by an in situ sol-gel process where components of the composition are mixed together sequentially. The composite resins are formed by a coupling reaction between the epoxide groups of the epoxy resin and the amino groups of the aminosilane. The silanes are hydrolyzed to form silanol groups which then undergo polycondensation to form an inorganic polymeric network of an intermediate. Finally, urethane moieties are introduced to the composite resins when unreacted hydroxyl groups from the intermediate react with the isocyanate. These composite resins are evaluated as protective coatings of mild steel substrates, including mechanical strength, anticorrosiveness in a saline medium, and adhesiveness to the mild steel substrates.