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In the paint and coating industries, paint adhesion testing is often used to determine if the paint or coating will adhere properly to the substrates to which they are applied. Several tests measure the resistance of paints and coatings from substrates: cross-cut test, scrape adhesion, pull-off test , and others.
Moisture cure polyurethanes have been widely used in the adhesive and coating industries. Thermal, mechanical, and surface properties of hyperbranched polyurethane-urea (HBPU) moisture cured coatings have been studied in relationship to chemical structure. [3]
Polyurethane is the basis for some construction adhesives in a caulking tube format. [16] On the way to a new and better glue for bookbinders, a new adhesive system was introduced for the first time in 1985. The base for this system is polyether or polyester, whereas polyurethane (PUR) is used as prepolymer.
Alternative surface treatments, such as plasma activation, can replace primers in the cases when the latter are used to improve adhesive bonding between the substrate and the paint or the lacquer. Quality of the adhesive bonding, such as varnishing and painting, depends strongly on the ability of the adhesive to efficiently cover the substrate ...
Adhesive bonding is a joining technique used in the manufacture and repair of a wide range of products. Along with welding and soldering, adhesive bonding is one of the basic joining processes. In this technique, components are bonded together using adhesives. The broad range of types of adhesives available allows numerous materials to be ...
The conservator may choose to add additional adhesives to existing adhesives, depending on the state of the existing adhesive. Replacing failed adhesives with new ones. The conservator may choose to replace a failed adhesive entirely. In this case, the conservator must carefully remove the failed adhesive from the area they plan to re-glue.
Binder – the binder is the glue that holds the paint together. This is usually a polymer that upon drying will polymerize to keep the pigments homogeneous and adhered to the substrate. Solvent – this is the bulk of the paint, it is used to keep the paint workable when it is wet. After paint is applied to a surface the solvent evaporates ...
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]