Corrosion adhesion promoters

Modification of surface properties Antistatic agent Slip agent Antiblocking agent Adhesion promoter Corrosion inhibitor Surfactant ... 

In 1987 he was promoted to distinguished member of the technical staff and technical manager. His efforts broadened to include projects on polymer-surface interactions adhesion promotion corrosion protection chemical vapor deposition and thin film growth optical fiber coating synthesis, structure, and reactivity of model organic surfaces and time-resolved surface vibrational spectroscopy. 

Uses Binder, film-former in paints (printed circuit board coatings, coil, container, corrosion protection, marine, metal, plastics, primers, sealers, tarp, wire enamels, wood varnishes, barrier primers), printing inks (gravure, flexo, screen printing), primers (adhesion promotion/corrosion protection), heat-sealable lacquers, two-pack paints, resinous/polymeric food-contact coatings, reactive resin in two-pack systems, e.g., crosslinked with melamine/phenolic resins Features Forms flexible, odorless, tasteless films thru solv. evaporation ... 

Chem. Descrip. phosphate functional specialty monomer Uses Adhesion promoter, corrosion inhibitor, foam control agent, reactive diluent, wet adhesion promoter for acrylic, polyvinylacetate, styrene acrylic, vinyl acrylic, vinyl veova, specialty purpose coatings including industrial maintenance OEM coil, light industrial, as well as high performance structural adhesives Properties Dk. brown vise, liq. mild acrylic odor vise. 4700 cP -23 C acid no. 119... 

One way to obtain enhanced heat and solvent resistance in SBR-based PSA is sulfur addition. It is difficult to obtain sufficient cure with sulfur during normal drying cycles (2-5 min at 150-180°C). Furthermore, cure via sulfur may continue after leaving the oven, thus degrading adhesion. When used in contact with copper, the sulfur may promote corrosion. The use of phenolic overcomes all of these problems despite the fact that its natural cure speed is also insufficient for the time frame available. This is overcome through addition of one of the accelerators... 

Control of fiber friction is essential to the processing of fibers, and it is sometimes desirable to modify fiber surfaces for particular end-uses. Most fiber friction modifications are accomplished by coating the fibers with lubricants or finishes. In most cases, these are temporary treatments that are removed in final processing steps before sale of the finished good. In some cases, a more permanent treatment is desired, and chemical reactions are performed to attach different species to the fiber surface, e.g. siliconized slick finishes or rubber adhesion promoters. Polyester s lack of chemical bonding sites can be modified by surface treatments that generate free radicals, such as with corrosive chemicals (e.g. acrylic acid) or by ionic bombardment with plasma treatments. The broken molecular bonds produce more polar sites, thus providing increased surface wettability and reactivity. 

Aluminium drinking carts. There are many patents [8] referring to the use of fluorozirconic acid (H2ZrF6)-based systems to treat the surface of aluminium cans to improve the corrosion resistance of the metal and the adhesion of the applied coatings. Typically, the zirconium fluoride will be used in conjunction with polyacrylic acid, presumably to form a complex in situ which acts as an adhesion promoter. Such surface treatment of aluminium is not restricted to zirconium fluorides, as ammonium zirconium carbonate displays similar properties in such application areas. 

Zircoaluminate adhesion promoters constitute a novel class of compounds which have proven themselves useful in arresting corrosion on coated metals, enhancing adhesion of adhesives to rubber and metal, and improving bonding of formed rubber articles containing ZA to other substrates. 

Cationic cure mechanisms are an alternative approach to uv curing. This involves the photogeneration of ions, which initiate ionic polymerization. This process is not subject to oxygen inhibition, as are some of the free radical mechanisms. Cationic cure mechanisms generally also provide less shrinkage and improved adhesion. The disadvantages are that the photoinitiators are sensitive to moisture and other basic materials. The acidic species can also promote corrosion. As a result, the vast majority of uv formulations are acrylate-based and cure by a free radical mechanism. 

Alkoxysilanes, including tetraalkoxysilanes, are utilized as crosslinking components in silicone rubbers, in the manufacture of silicone resins, as adhesion promoters with special organofunctional groups e.g. glass fiber layers, in the formulation of corrosion-resistant paints and in mold construction. 

Steric ( ) factors. Generally we observed that the use of even modest amounts of fatty acids or their esters in OH-rich binders substantially decreases the corrosion resistance. A possible explanation would be sterical shielding of the adhesion-promoting groups by the long fatty acid tails. 

Low surface tension causes excellent wetting of substrate which is required for good adhesion of the coating to the surface. Good adhesion promotes good corrosion resistance, impact resistance, and chip resistance. 

NZ Series. [Keniich Petrochemicals] Zirconates coupling agents adhesion promoters, antioxidants, antistats, accelerators, activatixs, catalysts, curatives, corrosion inhibitors, dispersants, emulsifiers, flame retardants, foamers, impact modifiers, release agents, retarders, stalnlizeis, etc. 

Aliphatic amines and polyamines are bases nearly as weak as ammonia. Alkyl amine hydrochlorides are used rarely now in view of the recognised toxicity. They are known in free or salt form as corrosion inhibitors, flotation collectors and adhesion promoters for asphalt coatings. Acylated polyamines are of interest for the amphoteric biocide synthesis. 

The (physically wetting) polyaniline primer CORRPASSIV was compared with a fast-drying two-component epoxy resin primer (Messrs. Finalin, Type 144) and a metal-reactive two-component primer with adhesion-promoting properties (Type 918). All three primers were coated with a two-component polyurethane paint (B412). CORRPASSIV, both with and without top coat, exhibited no rust formation beneath the primer. The slight undermining receded after the test, and even within the cross and scratch injuries, it was virtually impossible to detect any corrosion. 

Thus, FO are acting as adhesion promoters and corrosion inhibitors, whose mechanism can be explained as follows. In the course of thermal molding of powder polymer coatings filled by FO the oxides enter into physical-chemical interactions with the polymer melt. As a result, the oxides are reduced in the surface layer of the particles to metals. This fact is confirmed by... 

Adhesion Promoters and Inter- cial Thin Films Besides the above-mentioned inorganic conversion coatings, thin films can act as corrosion-resistant interfacial layers. Their thicknesses normally range from the length of a self-assembling molecule (approximately 2 nm) to about 100 nm. Various surface technologies have been developed so far and could be partly introduced into technical processes. 

Two principle mechanisms that are discussed as possible corrosion protection mechanisms on mild steel are discussed in short. ICPs may induce the formation of a passive oxide [206]. The ICP will be reduced as a consequence of passivation and will be reoxidized by oxygen reduction. Consequently, the ICP may promote the cathodic oxygen reduction on the polymer surface rather than at the metal-polymer interface. On the basis of the good corrosion results gained by the combination of a molecular adhesion promoter and the subsequent electrodeposition of the polymethylthiophene film Rammelt and coworkers [207] concluded that the essential aspect of the corrosion protection by ICPs could be the local separation of iron oxidation and oxygen reduction. This would eliminate the local pH increase at the metal surface and subsequent cathodic disbondment. 

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