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  2. Polyurethane - Wikipedia

    en.wikipedia.org/wiki/Polyurethane

    In 2007, the global consumption of polyurethane raw materials was above 12 million metric tons, and the average annual growth rate was about 5%. [46] Revenues generated with PUR on the global market are expected to rise to approximately US$75 billion by 2022. [ 47 ]

  3. Spray foam - Wikipedia

    en.wikipedia.org/wiki/Spray_foam

    Polyurethane is a closed-cell foam insulation material that initially contains a low-conductivity gas in its cells. [6] As a result of the high thermal resistance of the gas, spray polyurethane insulation typically has an initial R-value around R-3.4 to R-6.7 per inch. [6] In comparison, glass wool typically has an R-Value of only R-3 to R-4 ...

  4. Polyurethane foam - Wikipedia

    en.wikipedia.org/wiki/Polyurethane_foam

    An assortment of polyurethane foam products for cushioning and insulation. Polyurethane foam is a solid polymeric foam based on polyurethane chemistry. As a specialist synthetic material with highly diverse applications, polyurethane foams are primarily used for thermal insulation and as a cushioning material in mattresses, upholstered furniture or as seating in vehicles.

  5. Prices of chemical elements - Wikipedia

    en.wikipedia.org/wiki/Prices_of_chemical_elements

    This is a list of prices of chemical elements. Listed here are mainly average market prices for bulk trade of commodities. Data on elements' abundance in Earth's crust is added for comparison. As of 2020, the most expensive non-synthetic element by both mass and volume is rhodium.

  6. 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.

  7. 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]

  8. List of insulation materials - Wikipedia

    en.wikipedia.org/wiki/List_of_insulation_materials

    This is a list of insulation materials used around the world. Typical R-values are given for various materials and structures as approximations based on the average of available figures and are sorted by lowest value. R-value at 1 m gives R-values normalised to a 1 metre (3 ft 3 in) thickness and sorts by median value of the range.

  9. Wanhua Chemical Group - Wikipedia

    en.wikipedia.org/wiki/Wanhua_Chemical_Group

    As of 2019, it is the world's largest producer of the polyurethane raw material methylene diphenyl diisocyanate (MDI). [15] According to another source, the listed company is the second largest producer of the world for aliphatic diisocyanate (ADI) as well as the largest producer of China for toluene diisocyanate (TDI). [16]