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  2. List of polyurethane applications - Wikipedia

    en.wikipedia.org/wiki/List_of_polyurethane...

    Industrial Insulation. Rigid polyurethane foam is used in various industries to provide thermal insulation to installations and pipes. In particular, the piping for district heating systems in Europe is primarily insulated using a pre-insulated pipes sandwich assembly composed of a steel heat service pipe, an insulating layer (polyurethane foam) and a polyethylene (PE) casing, which are bonded ...

  3. Polyurethane - Wikipedia

    en.wikipedia.org/wiki/Polyurethane

    Polyurethane synthesis, wherein the urethane groups −NH−(C=O)−O− link the molecular units A kitchen sponge made of polyurethane foam . Polyurethane (/ ˌ p ɒ l i ˈ jʊər ə ˌ θ eɪ n,-j ʊəˈr ɛ θ eɪ n /; [1] often abbreviated PUR and PU) refers to a class of polymers composed of organic units joined by carbamate (urethane) links.

  4. Wood finishing - Wikipedia

    en.wikipedia.org/wiki/Wood_finishing

    Excellent. It finishes hard and can be buffed to a gloss. Use a release agent. A thick finish can leave a plastic feel. 2-Part polyurethane: Transparent Stronger protection than regular polyurethane varnish Durable once cured, generally less than an hour low or free of VOCs, nonreactive when cured

  5. Conformal coating - Wikipedia

    en.wikipedia.org/wiki/Conformal_coating

    Coating material (after curing) should have a thickness of 30–130 μm (0.0012–0.0051 in) when using acrylic resin, epoxy resin, or urethane resin. For silicone resin, the coating thickness recommended by the IPC standards is 50–210 μm (0.0020–0.0083 in).

  6. Moisture cure polyurethane - Wikipedia

    en.wikipedia.org/wiki/Moisture_cure_polyurethane

    Moisture cured polyurethane–urea coatings have been made by reacting 1,2,3-triazole rich polyether polyols with HMDI at NCO/OH eq. ratio of 1.2 to obtain isocyanate-terminated polyurethane prepolymers. The prepolymers were cured under atmospheric moisture to make polyurethane–urea free films. [5]

  7. Thermoplastic polyurethane - Wikipedia

    en.wikipedia.org/wiki/Thermoplastic_polyurethane

    Thermoplastic polyurethane (TPU) is any of a class of polyurethane plastics with many properties, including elasticity, transparency, and resistance to oil, grease, and abrasion. Technically, they are thermoplastic elastomers consisting of linear segmented block copolymers composed of hard and soft segments.

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