Paints chemically cured

Fats and oils (triglycerides) from plants and animals are renewable sources of chemicals, but the amounts of the chemicals made from them are small compared with those made from petroleum and natural gas. This may change if biodiesel fuel (e.g., ethyl oleate) made by the alcoholysis of oils becomes common. Such esters may be useful as environmentally friendly solvents.50 Unsaturated oils, such as linseed oil, are the basis of oil-based paints, which cure by cross-linking through oxidation by air. Soaps are the potassium or sodium salts of the long-chain fatty acids obtained by the hydrolysis of the triglycerides. The dibasic dimer fatty acids obtained by the dimerization of oleic and linoleic acids (both Cig acids) are made into oligomeric fatty amides which are used to cure epoxy resins. The un-... 

Epoxy resins [1] are duroplastics. Polyaddition initially produces an essentially linear macromolecule that still possesses numerous OH groups. This addition product is either placed in a mold or applied to surfaces in liquid form. This is followed by chemical curing, and this process often involves heat application. Because of their reliable adhesion to metallic substrates, epoxy resins are excellent primer coats for automobile paints and can also be used as metal adhesives. A further important field of application is electronics, where they serve as structural... 

CAS 1314-13-2 EINECS/ELINCS 215-222-5 Uses Aclivalor, reinforcer, hiding pigment for use in rubber (NR, SR, latex), paint, chemicals, stearate, resin, primer, and adhesives Features Med. to fast cure rate... 

Newer types of high-performance paints used on ship exteriors include those based on epoxy resins, polyurethane resins, vinyl resins (also vinyl/ alkyd or vinyl/acrylic blends) or chlorinated rubber. Epoxies and polyurethanes are chemically-curing types and present curing problems at low temperatures, whilst the overcoating intervals are critical for best adhesion... 

Even before the advent of modern polymer science, a variety of polymers were bonded together by chemical processes. When these early industrialists were experimenting with the drying of paint, the curing of inks, the vulcanization of rubber, and the tanning of leather, among others, they had not realized the similarities among the different processes. 

Paints, whose curing is provoked by chemical reaction, including two-pack paints... 

Most often, both physical and chemical curing take place, as is the case with the film formation of thermosetting powders. At elevated temperatures, physical sintering of the particles takes place, followed by chemical reactions between different components in the powder. Another example is film formation of solvent-based reactive coatings, such as the common house paints. In this case, the solvent (physically) evaporates from the curing film, causing the binder molecules to coalesce and start chemical polymerization reactions. 

Air-drying epoxy paints are not required to be stoved due lo chemical reaction at about I20°C, which may affect its hardness. To speed up the curing, it may be stoved at a maximum temperature of, say, 60-80°C as noted in column 2. 

Aliphatic polyamines, amine adducts and polyamides react with epoxide resins at normal temperatures to give complexes with outstanding chemical resistance. Paints based on this type of reaction must be supplied in two separate containers, one containing the epoxide resin and the other the curing agent , the two being mixed in prescribed proportions immediately before use. 

These are supplied as separate components which are mixed together and then applied. The paints cure by chemical reaction —a process which also occurs in the can and so limits the time available for application after mixing. The films are tough and have good chemical resistance. There are three main types of these coatings ... 

Radiation-induced modification or processing of a polymer is a relatively sophisticated method than conventional thermal and chemical processes. The radiation-induced changes in polymer materials such as plastics or elastomers provide some desirable combinations of physical and chemical properties in the end product. Radiation can be applied to various industrial processes involving polymerization, cross-linking, graft copolymerization, curing of paints and coatings, etc. 

The curing of polyurethane paints is a complex chemical and physical process therefore a mathematical model may be a valuable tool to describe the process and manage the data. 

The initial drying of currently applied alkyd paints is accomplished by evaporation of solvent (physical drying). Subsequently, the eventual curing of the alkyd paint is completed by the formation of a polymer network, which is mainly formed by chemical crosslinks (oxidative drying) but in some cases also physical interactions between the fatty acid side chains occur, such as crystallization or proton-bridge formation [129]. Efficient network formation is crucial in the formation of dry films with good mechanical properties. Due to the presence of unsaturated units in the investigated LOFA- and TOFA-PHA bin-... 

Uses Intermediate in the manufacture of azo dyes and pigments for printing inks, textiles, paints, plastics, and crayons curing agent for isocyanate-terminated polymers and resins rubber compounding ingredient analytical determination of gold formerly used as chemical intermediate for direct red 61 dye. 

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