Solvent curing epoxy resin

For resistance to acid conditions alone, traditional filled and unfilled bituminous solutions (which have economic advantages), chlorinated rubber and shellac have been used. Crosslinking coatings, e.g. amine-cured epoxy resins, often blended with coal-tar which develops resistance to oils and solvents, have obvious advantages on chemical plant. 

Inertness The cured epoxy resins are chemically inert. The ether groups and benzene rings are virtually non-vulnerable to caustic attack and are extremely resistant to acids. Chemical inertness of an epoxy resin is enhanced by the dense and closely packed structure which is extremely resistant to solvent action. 

Systems cured with DETA and TETA generally have excellent resistance to aqueous sodium hydroxide even at 50% concentration and 80°C. Their resistance to 25 percent sulfuric acid, 23 percent hydrochloric acid, and 25 percent chromic acid is also very good up to 80°C. Strong organic acids such as acetic acid generally attack DETA and TETA cured epoxy resins as well as strong (40%) nitric acid. Resistance to intermittent solvent exposure is excellent however, long-term immersion in any aliphatic solvent such as kerosene is not recommended. 

Has a reduced solvent content or is solvent free to minimize health effect due to solvents. There have been significant efforts in developing water borne and UV/EB cured epoxy resins to eliminate solvents. 

Properties White crystals. Mp 270C (sublimes), approximately 99% pure. Derivatives (alkyl ada-mantanes) have potential uses in imparting heat, solvent, and chemical resistance to many basic types of plastics. Synthetic lubricants and pharmaceuticals are also based on adamantane derivatives. Adamantane diamine is used to cure epoxy resins. 

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-... 

Uses Mfg. of phenolic and thermosetting resins, furan polymers, urea-formaldehyde resins wetting agent foundry sand binders corrosion-resist, resins intermediate for esterification and etherification paints solvent, plasticizer for phenolic resins solvent for dyes and resins nonreactive epoxy resin diluent vise, reducer, cure promoter, and carrier in amine-cured epoxy resins gel retarder in casein/protein glues polymer sealants/cements synthetic flavoring agent in foods and pharmaceuticals cosmetics ingred. in food-pkg. adhesives... 

Hazardous Decomp. Prods. Heated to decomp., emits acrid smoke and irritating fumes Uses Nonionic surfactant intermediate (nonbiodegradable) lube oil additives stabilizers curing agents petroleum demulsifiers plasticizers dyestuffs aromatic oils fungicides antioxidants for plastics and rubber solvent nonreactive epoxy resin diluent defoamer in food-contact coatings and paper/paperboard... 

Methylene chloride (dichloromethane, methylene dichloride) n. CH2-CI2. A low-boiling chlorinated hydrocarbon which is a colorless, fairly dense, non-flammable liquid used as a solvent for cellulose triacetate and vinyl resins, a solvent in the polymerization of polycarbonate resins, and as a reactant for certain phenolic resins. It was widely used as a paint stripper and solvent for cured epoxy resins, but is less used now in the effort to keep chlorinated solvents... 

As regard the reproductive system, the epoxy resins and curing agents themselves probably do not affect pregnancy and reproduction in humans even if some of the diluents and solvents in epoxy resin systems may affect reproduction. In particular, two solvents sometimes found in epoxy resin systems (2-ethoxyethanol and 2-methoxyethanol) cause birth defects in laboratory animals and reduced sperm counts in men. Moreover, some glycidyl ethers also damage the testes and cause birth defects in test animals. It is not known whether they have the same effects in humans. Most other solvent additives have not been adequately tested to determine if they affect reproduction. 

A 121°C cure, self-extinguishing, self-adhesive, solvent resistant, epoxy resin with a good dry service temperature, suitable for autoclave, press or vacuum-bag moulding. Co-curable with 7714A, which provides considerable design flexibility with respect to the use of hybrid lay-ups. Designed for use in structural laminates and honeycomb core sandwich panels for aircraft. 

Allylacetone, methallylacetone, 2-allylcyclohexanone, l-phenyl-4-penten-l-one and other allyl substituted ketones, in the presence of free-radical initiators, copolymerize with MA to give equimolar copolymers in good yields.Copolymerization with maleimides also occur but non-equimolar copolymers are obtained. The anhydride copolymers exhibit good solubility in many solvents, are compatible with many resin systems, and are useful for curing epoxy resins for castings and adhesives. 

Process Raw Material. Industrial solvents are raw materials in some production processes. Eor example, only a small proportion of acetone is used as a solvent, most is used in producing methyl methacrylate and bisphenol A. Alcohols are used in the manufacture of esters and glycol ethers. Diethylenetriamine is also used in the manufacture of curing agents for epoxy resins. Traditionally, chlorinated hydrocarbon solvents have been the starting materials for duorinated hydrocarbon production. 

To improve the weatherabUity of epoxies, which normally chalk and yeUow, epoxy—polyester aUoys or hybrids are used. These powders with improved overbake resistance cure at temperatures as low as 130°C. They have film flexibiHty similar to epoxy resins, but their hardness is slightly decreased. Corrosion resistance is equivalent to epoxy powders in most cases, although solvent and alkaH resistance is inferior. 

Thermosetting epoxy and polyurethane chemically-cured liquid resins can provide, among other characteristics, superior abrasion resistance coatings. Solvent-free formulation applied by hot spray techniques can achieve film thicknesses of up to 5 mm. 

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