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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 dispersion - Wikipedia

    en.wikipedia.org/wiki/Polyurethane_dispersion

    Polyurethane dispersion, or PUD, is understood to be a polyurethane polymer resin dispersed in water, rather than a solvent, although some cosolvent may be used.Its manufacture involves the synthesis of polyurethanes having carboxylic acid functionality or nonionic hydrophiles like PEG (polyethylene glycol) incorporated into, or pendant from, the polymer backbone. [1]

  4. 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.

  5. Sealant - Wikipedia

    en.wikipedia.org/wiki/Sealant

    Sealant is a substance used to block the passage of fluids through openings in materials, [1] a type of mechanical seal. In building construction sealant is sometimes synonymous with caulk (especially if acrylic latex or polyurethane based) [2] and also serve the purposes of blocking dust, sound and heat transmission. Sealants may be weak or ...

  6. Wanhua Chemical Group - Wikipedia

    en.wikipedia.org/wiki/Wanhua_Chemical_Group

    Wanhua Chemical Group Co., Ltd. known as Wanhua Chemical and formerly Yantai Wanhua Polyurethane or Yantai Wanhua Polyurethanes or Yantai Wanhua, is a Chinese listed company in chemical industry. History

  7. Dow Chemical Company - Wikipedia

    en.wikipedia.org/wiki/Dow_Chemical_Company

    Dow Chemical was implicated in a price-fixing scheme that inflated the cost of polyurethane for customers. The U.S. Justice Department closed an investigation in 2007 without charges or recommendations, but a class-action civil lawsuit won at a jury trial in 2013. Dow settled the suit in 2016 for $835 million. [43]

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