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  2. Stain-blocking primer - Wikipedia

    en.wikipedia.org/wiki/Stain-blocking_primer

    The below calculated ACIs were done on solvent-based primer containing 350 g/L of solvents and the water-based primer containing 50 g/L of butyl glycol. The values on this chart indicate that the use of mineral spirits based primers would need 6 to 7 air changes per hour requiring significant ventilation. The use of low-odor, isoparaffinic ...

  3. Aral Sea - Wikipedia

    en.wikipedia.org/wiki/Aral_Sea

    In the 1970s the rate nearly tripled to 50–60 cm (20–24 in) per annum, and in the 1980s to 80–90 cm (31–35 in) per annum. The amount of water taken for irrigation from the rivers doubled between 1960 and 2000. In the first half of the 20th century prior to the irrigation, the sea's water level above sea level held steady at 53 m.

  4. Waterborne resins - Wikipedia

    en.wikipedia.org/wiki/Waterborne_resins

    Most coatings have four basic components. These are the resin, solvent, pigment and additive systems [5] but the resin or binder is the key ingredient. Continuing environmental legislation in many countries along with geopolitics such as oil production are ensuring that chemists are increasingly turning to waterborne technology for paint/coatings and since resins or binders are the most ...

  5. Shellac - Wikipedia

    en.wikipedia.org/wiki/Shellac

    Shellac is an odour and stain blocker and so is often used as the base of "all-purpose" primers. Although its durability against abrasives and many common solvents is not very good, shellac provides an excellent barrier against water vapour penetration. Shellac-based primers are an effective sealant to control odours associated with fire damage ...

  6. Alkyd - Wikipedia

    en.wikipedia.org/wiki/Alkyd

    Alkyd resins are usually classed as long oil, [11] medium oil and short oil. [12] These terms represent the oil length in the resin. [ 13 ] Alkyds are also modified with phenolic resin , styrene , vinyl toluene , acrylic monomers (to make them dry more quickly) and isocyanates to produce a polyurethane modified alkyd.

  7. Messinian salinity crisis - Wikipedia

    en.wikipedia.org/wiki/Messinian_salinity_crisis

    In the Messinian salinity crisis (also referred to as the Messinian event, and in its latest stage as the Lago Mare event) the Mediterranean Sea went into a cycle of partial or nearly complete desiccation (drying-up) throughout the latter part of the Messinian age of the Miocene epoch, from 5.96 to 5.33 Ma (million years ago).