GEOPOLYMER FOAM FORMULATION
    2.
    发明申请

    公开(公告)号:US20190152854A1

    公开(公告)日:2019-05-23

    申请号:US16091237

    申请日:2017-04-04

    IPC分类号: C04B28/00 C04B24/38 C04B38/10

    摘要: A method for producing a geopolymer foam is proposed, comprising providing a foamable formulation, foaming the formulation, and allowing the foamed formulation to harden. The foamable formulation comprises at least one inorganic binder selected from the group consisting of latent hydraulic binders, pozzolanic binders and mixtures thereof; at least one alkaline activator selected from the group consisting of alkali metal hydroxides, alkali metal carbonates, alkali metal aluminates, alkali metal silicates and mixtures thereof; at least one surfactant; nanocellulose and water. The mechanical properties of the foam are improved by incorporating nanocellulose.

    POLYAMIDE FOAMS WHICH INHIBIT THE SPREAD OF FIRES FOR FILLING CAVITIES IN MINING

    公开(公告)号:US20190211137A1

    公开(公告)日:2019-07-11

    申请号:US16326869

    申请日:2017-09-04

    摘要: Polyamide foams which inhibit the spread of fires for filling cavities in mining Polyamide foams which do not propagate fire are obtained by mixing (i) a liquid isocyanate component which comprises at least one polyisocyanate and in which the molar ratio of aromatic isocyanate groups to the sum of aromatic and aliphatic isocyanate groups is at least 60 mol %, with (ii) at least one liquid isocyanate-reactive component which comprises a reactive diluent, and the reactive diluent comprises (a) a chain-extending and/or crosslinking reactive diluent selected from among aliphatic branched C24-66-polycarboxylic acids, alicyclic C24-66-polycarboxylic acids and partial esters of polycarboxylic acids having at least two unesterified carboxyl groups and/or (b) a chain-terminating reactive diluent selected from among aliphatic branched C24-66-monocarboxylic acids, alicyclic C24-66-monocarboxylic acids and partial esters of polycarboxylic acids having one unesterified carboxyl group, and (iii) optionally a solid isocyanate-reactive component, where the liquid isocyanate-reactive component and/or the solid isocyanate-reactive component comprises an aromatic C8-18-polycarboxylic acid and/or an anhydride thereof. Reactive diluents are dimeric fatty acids or trimeric fatty acids, which are optionally hydrogenated. The foams are suitable for filling cavities in mining, tunnel construction, civil engineering or in oil and gas recovery, as fire protection foam, thermal insulation or acoustic damping.