Moisture-cure polyurethanes -- or polyurethane prepolymer -- are isocyanate-terminated prepolymers that are formulated to cure with ambient water.[1] Cured PURs are segmented copolymer polyurethane-ureas[2] exhibiting microphase-separated morphologies. One phase is derived from a typically flexible (subambient glass transition temperature, Tg) polyol that is generally referred to as the “soft phase”. Likewise the corresponding “hard phase” is born from the di- or polyisocyanates that through water reaction produce a highly crosslinked material with softening temperature well above room temperature.
^Ren, Dakai; Frazier, Charles E. (2012). "Wood/adhesive interactions and the phase morphology of moisture-cure polyurethane wood adhesives". International Journal of Adhesion and Adhesives. 34: 55–61. doi:10.1016/j.ijadhadh.2011.12.009.
^Benedek, Istvan; Feldstein, Mikhail M. (2019-07-05). Handbook of Pressure-Sensitive Adhesives and Products: - Three Volume Set. CRC Press. ISBN 978-1-4398-3311-7.
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Moisture-curepolyurethanes -- or polyurethane prepolymer -- are isocyanate-terminated prepolymers that are formulated to cure with ambient water. Cured...
curing period for evaporation of organic solvents absorbed on the latex particles, and possibly chemical curing of the particles. Oil, polyurethane,...
with water and thus cure the adhesives. Therefore, one-component polyurethane adhesives are also named as moisture-curepolyurethanes. In addition, interactions...
Polyurethane products have many uses. Over three quarters of the global consumption of polyurethane products is in the form of foams, with flexible and...
Polyurethane (/ˌpɒliˈjʊərəˌθeɪn, -jʊəˈrɛθeɪn/; often abbreviated PUR and PU) refers to a class of polymers composed of organic units joined by carbamate...
leatherette, imitation leather, faux leather, vegan leather, PU leather (polyurethane), and pleather. Artificial leathers are often used in clothing fabrics...
contact with moisture; Phenolic, amino, and furan resins all cured by polycondensation involving the release of water and heat, with cure initiation and...
adhesives are a medium for the polyester or the polyurethane resin. The solvent is dried during the curing process. Pre-mixed and frozen adhesives (PMFs)...
One-part silicones make use of moisture in the atmosphere to cure from the outside towards the center. The time to cure will decrease with an increase...
quinocarcin, and tetrahydroisoquinoline. Oxazolidines are used as moisture scavengers in polyurethane and other systems. Oxazolidines have even been researched...
Tg (Glass transition) Good dielectric properties Polyurethane Good dielectric properties Good moisture resistance Solvent resistance Less reversion potential...
Epoxy is the family of basic components or cured end products of epoxy resins. Epoxy resins, also known as polyepoxides, are a class of reactive prepolymers...
Zeng Z (2020-12-15). "Mechanism and kinetics of moisture-curing process of reactive hot melt polyurethane adhesive". Chemical Engineering Journal Advances...
(1902–1982) is credited with the invention of polyurethane in 1937. He succeeded in synthesizing polyurethane foam by exploring his basic idea that mixing...
phenolic (PF) resins, unsaturated polyester (UP) resins, polyimides, polyurethane (PUR) resins, silicones, and vinyl esters. These are made by the reaction...
while hydrophobic or hydrophilic polyurethane injections are used to seal cracks to prevent penetration of moisture or water. Concrete is both strong...
or hydrophobic state when cured with 100% cure times as little as 30 minutes. Closed-cell injections will not retain moisture and are not subject to erosion...
characteristics, including enhanced appearance and increased resistance to moisture and other environmental agents. Finishing can also make wood easier to...
Classic two-package epoxies or polyurethanes would fall into this category. The "drying oils", counter-intuitively, cure by a crosslinking reaction even...
stay in the clamping device until the glue has cured. When manufacturing a panel with a polyurethane core pressure and heat are both generated from the...
easily be touched up with another coat of shellac (unlike polyurethane, which chemically cures to a solid) because the new coat merges with and bonds to...
One-component, moisture-cure urethane (MCU): MCU CARCs cured in a two-stage process where water and isocyanate groups combined to produce a cured paint film...
sealant is sometimes synonymous with caulk (especially if acrylic latex or polyurethane based) and also serve the purposes of blocking dust, sound and heat transmission...
formaldehyde are plasticizers. It is widely used in the production of polyurethane fibers. The PAMAM class of dendrimers are derived from ethylenediamine...
called polyurethane foam. The carbon dioxide that is liberated in this reaction is the primary blowing (foaming) agent especially in many polyurethane foams...
effect a hybrid, novel technologies include manufacturing a moisture-curable polyurethane alkyd. Grafting of silicon based materials onto alkyds has also...
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