Resins cellulose derivative

Dimethylacetamide [CHjCON(CH3)2] - an important industrial solvent for polyacrylonitrile, vinyl resins, cellulose derivatives, styrene polymers and linear polyesters. 

USE Mfg flavors, perfumes. Solvent for resins, cellulose derivatives, plastics. Caution May be irritating to skin, mucous membranes, and, in high concns, narcotic. 

The coatings can be melt-laid, applied in suspensions based on polyolefines or their halogen-derivatives, polyesters, acrylates, epoxy resins, cellulose derivatives and numerous copolymers. 

Aliphatic hydrocarbons, naphthas, gasoline, or paraffin hydrocarbons are chemically inert and are thus very stable solvents [14.262], [14.263]. Aliphatic hydrocarbons exhibit a good solvency for mineral oils, fatty oils (with the exception of castor oil), waxes, and paraffin. They also dissolve rubber, polyisobutene, molten polyethylene, poly(butyl acrylate), poly(butyl methacrylate), and poly(vinyl ethers). However, most other polymers, polar resins, cellulose derivatives, and most paint binders are insoluble. Resins and binders with a low polarity dissolve less readily in aliphatic hydrocarbons than in aromatic hydrocarbons. 

The resin, as has been stated, may be any resin containing hydroxyl groups. This includes castor oil, alkyds, nitrogen resins, epoxy resins, cellulose derivatives and so on, provided always that, if a mixture is used, then the ingredients must be compatible with one another. However, the most popular resins used are saturated polyesters acrylic resins and, to a lesser extent, polyethers. 

Immobilization by chemical or physical adsorption, i.e., surface adsorption to a water-insoluble solid support (ion exchange resin, cellulose derivatives, or metal oxides)... 

Suspension polymerization of VDE in water are batch processes in autoclaves designed to limit scale formation (91). Most systems operate from 30 to 100°C and are initiated with monomer-soluble organic free-radical initiators such as diisopropyl peroxydicarbonate (92—96), tert-huty peroxypivalate (97), or / fZ-amyl peroxypivalate (98). Usually water-soluble polymers, eg, cellulose derivatives or poly(vinyl alcohol), are used as suspending agents to reduce coalescence of polymer particles. Organic solvents that may act as a reaction accelerator or chain-transfer agent are often employed. The reactor product is a slurry of suspended polymer particles, usually spheres of 30—100 pm in diameter they are separated from the water phase thoroughly washed and dried. Size and internal stmcture of beads, ie, porosity, and dispersant residues affect how the resin performs in appHcations. 

Carbon, hydrogen and possibly oxygen Resin and derivatives Natural drying oils Cellulose derivatives Alkyd resins Epoxy resins (uncured) Phenol-formaldehyde resins Polystyrene Acrylic resins Natural and synthetic rubbers Carbon monoxide Aldehydes (particularly formaldehyde, acrolein and unsaturated aldehydes) Carboxylic acids Phenols Unsaturated hydrocarbons Monomers, e.g. from polystyrene and acrylic resins... 

Backing and Tear-repair. The methods and materials proposed for lining include the following (a) mulberry paper attached with starch (rice or wheat), methylcellulose, or carboxymethyl-cellulose adhesives (18 19), (b) contemporary tapa attached with starch or cellulose-derived adhesives (20 21), (c) nylon laminating tissue and heat-set polyamide resin (22) and (d) stitched backings. 

The physicallydried binding agents include acrylic resins, polyesters, silicones, cellulose derivatives and others. Polyamides and polyolefins are used as raw material for powder lacquers. Differing from physically dried lacquers, chemically dried lacquers contain crosslinked macromolecules. The raw materials used as binding agents can in this case be used without solvents because of their low viscosities and react with the substrate by one of the above mentioned polymerization reactions. 

Manufacture of perfumes, flavoring agents, natural and synthetic resins, lacquers, and plastics. Organic synthesis, laboratory reagent, solvent for cellulose derivatives. 

Resin and Polymer Solvent. Dimethylacetamide is an excellent solvent for synthetic and natural resins. It readily dissolves vinyl polymers, acrylates, cellulose derivatives, styrene polymers, and linear polyesters. Because of its high polarity, DAIAC has been found particularly useful as a solvent for polyacrylonitrile, its copolymers, and interpolymers. Copolymers containing at least 85% acrylonitrile dissolve in DAIAC to form solutions suitable for the production of films and yams (9). DAIAC is reportedly an excellent solvent for the copolymers of acrylonitrile and vinyl formate (10), vinylpyridine (11), or allyl glycidyl ether (12). 

Lacquer. A coating composition that is based on synthetic thermoplastic film-forming material dissolved in organic solvent that dries primarily by solvent evaporation. Ts pical lacquers include those based on nitrocellulose, other cellulose derivatives, vinyl resins, acrylic resins, and the like. 

This group, commonly called epoxy, characterizes the epoxy resins. Epichlorohydrin and ethylene oxide are well-known epoxides. The compounds are also used in certain types of cellulose derivatives and fluorocarbons. 

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