Ethyl cellulose plastics properties

Ethyl cellulose (EC) is a water-insoluble cellulose ether. It is produced by reaction of alkali cellulose with ethylene chloride. It has film-forming and thermoplastic properties. As a plastic, it can be processed by extrusion and injections. It is hard, stiff and with good resistance to impact. It is soluble in the molten state with other thermoplastics. As for its film-forming properties, it is used in the formulation of varnishes, inks and glues. It forms removable coatings. 

Using tensile testing of free films, researchers have shown that plasticizer type and concentration influence the mechanical properties of both acrylic and cellulosic polymers. ° Fig. 10 shows the influence of dibutyl sebacate concentration on the tensile properties of free ethyl cellulose films. ° As the concentration of the... 

Chem. Descrip. Oil-modified sebacic acid alkyd polymeric plasticizer Uses Plasticizer for PVB, NC films, fabric coatings ethyl cellulose cable, paper, wood, and metal lacquers grinding medium for NC lacquers Features Permanent exc. pigment wetting and stability props. Properties Yel. vise, liq. sol. in aromatic hydrocarbons and in mixts. with ethanol, butanol, and ethyl acetate sp.gr. 0.998 vise. (G-H) Z2 acid no. 3.5 max. flash pt. 288 C fire pt. 313 C Uniflex DBS [Arizona Eastech]... 

Synonyms Hexadecanoic acid isooctyl ester Empirical C24H48O2 Formula C8H17OOCC15H31 Properties Clear liq. sol. in most org. soivs. m.w. 368.72 dens. 0.863 (20 C) m.p. 6-9 C b.p. 228 C (5 mm) flash pt. (COC) 213 C Toxicology LD50 (IP, mouse) 200 mg/kg Precaution Combustible Uses Secondary plasticizer for synthetic resins, extrusion aid plasticizer for PS, cellulose nitrate, ethyl cellulose Manuf/Distrib. ChemService http //www.chemservice.com, Inolex http //www.inolex. com... 

Butyl stearate (butyl octadecaonoate) n. C17H35COOC4H9. A mold lubricant and plasticizer, compatible with natural and synthetic rubbers, chlorinated rubber, and ethyl cellulose. It can be used in vinyls in very low concentrations as a non-toxic, secondary plasticizer and lubricant. In the production of polystyrene, butyl stearate is added to the emulsion polymerization to impart good flow properties to the resin See image). 

Dibutyl sebacate (DBS) n. (CH2)s (COO C4H9)2. a plasticizer, one of the most effective of the sebacate family. It has good low-temperature properties, low volatility, and is compatible with vinyl chloride polymers and copolymers, polyvinyl butyral, and ethyl cellulose. It is non-toxic, suitable for uses in food wrappings. 

Dicyclohexyl phthalate (DCHP) n. C6H4 (COOC6Hii)2. a plasticizer for PVC and many other resins. It imparts good electrical properties, low volatility, low water and oil absorption, and resistance to extraction by hexane and gasoline. In vinyls DCHP is usually combined with other plasticizers. In cellulose nitrate, polystyrene, poly-methyl methacrylate, and ethyl cellulose it serves as a primary plasticizer. 

Polyethylene glycol (200) dibenzoate n. C6H5C0(0CH2CH2)40C0-C6H5. a plasticizer compatible with cellulose acetate butyrate, ethyl cellulose, polymethyl methacrylate, polystyrene, and vinyl resins. Its major application is with phenol-formaldehyde resins in laminating applications, to improve flexibility without loss of electrical properties and high-temperature capability. 

Cellulosics have similar properties that vary in degree. The four most prominent cellulosics are cellulose acetate, cellulose acetate butyrate, cellulose propionate, and ethyl cellulose. A fifth member of this group is cellulose nitrate. Cellulose materials are available in a great number of formulations and flow rates and are manufactured to offer a wide range of properties. They are formulated with a wide range of plasticizers for specific properties. 

Figure 6-61. Heat-resistance properties of resins retaining 50 percent of properties obtainable at room temperature with resin exposure and testing at elevated temperature. Zone 1 Acrylics, cellulose esters, LDPE, PS, PVC, SAN, SBR, UF, etc. Zone 2 Acetals, ABS, chlorinated polyether, ethyl cellulose, EVA, ionomer, PA, PC, HDPE, PET, PP, PVC, PUR, etc. Zone 3 PCTFE, PVDF, etc. Zone 4 Alkyds, fluorinated ethylene-propylene, MF, polysulfone, etc. Zone 5 TS acrylic, DAP, epoxy, PF, TS polyester, PTFE, etc. Zone 6 Parylene, polybenzimidazole, silicone, etc. Zone 7 PAI, PI, etc. Zone 8 Plastics in R D etc. Since plastics compounding is rather extensive, certain basic resins can be modified to meet different heat-resistance properties.

S.M. Maru, M. de Matas, A. Kelly, and A. Paradkar, Characterization of thermal and rheological properties of zidovudine, lamivudine and plasticizer blends with ethyl cellulose to assess their suitabihty for hot melt extrusion, Eur J Pharm Sci, 44 (4), 471-8,2011. 

Di (2-ethyl hexyl) Sebacate n (dioctyl sebacate) A plasticizer for vinyl chloride polymers and copolymers, cellulosic plastics, polystyrene, and polyethylene. It imparts good low-temperature properties. 

Chem. Descrip. Epoxidized unsat. soy bean oils CAS 8013-07-8 EINECS/ELINCS 232-391-0 Uses Sec. plasticizer, costabilizer for flexible PVC, plastlsols, calendered and extruded prods., wetting of pigments, chlorinated paraffins, alkyd resins, neoprene, ethyl/cellulose, PVC/PVA emulsions Properties Gardner 3 max. cl. liq. dens. 0.99 g/ml vise. 3-7 poise acid no. 1.0 max. ref. index 1.473 7.0% min. cone. 

Isopropyl ocetote is a wofer-whife pleosont-odored liquid with properties intermediote between ethyl and butyl acetates. It is miscible with most of the common organic solvents such os alcohols, ketones, esters, oils, hydrocarbons, etc., and it is a solvent for nitrocellulose, cellulose ocetate (of low viscosity) and a wide ronge of oils, fats, waxes, gums ond notural and synthetic resins. Like n-propyl ocetote, its solvent power for cellulose esters is increosed when lower aliphatic alcohols are added. It is largely used in the lacquer industry where its slow evaporation rate and blush resistance ore of importance. It is also used in the monufacture of plastics, artificial leather, dopes, films, cements, and in the recovery of acetic ocid from aqueous solutions. 

Some results, which were considered supporting the lubricity theory, were also found Verhoek, who measured vapor pressures of plasticizers in polymers, found that plasticizers reduce solvent retention, which was considered to support these theories (plasticizers fill voids and so they exclude solvents). Rententivity and permeability of cellulose acetate plasticized with different sulfonamides, phthalates and phosphates, were measured by Kirkpatrick who concluded that these properties depended on the attractive forces resulting between the plasticizer and the polymer. Houwink measured swelling of some butadiene-acrylonitrile copolymers with different acrylonitrile content when these were mixed with solvents of different polarities, and proved the importance of the polarity of the plasticizer and the polymer. Moreover, Houwink measured the brittle point of ethyl... 

Ethylcelluloses are low density polymers (1070-1180 kg.m ) with solubilities depending on the degree of ethylation usually commercial grade contains 44-48% ethoxyl functional groups. Solid masses of ethylcellulose exhibit low absorption of moisture, excellent dimensional stability and low temperature toughness and impact resistance. Chemically they are less resistant towards acids than cellulose esters but much more resistant to alkalis. They can be processed by injection molding. Because ethylcellulose is soluble in a wide variety of solvents, it provides a wide variety of varnish formulations. Benzylcelluloses yield plastics with excellent dielectric properties and chemical stability. 

Di (2-ethyl hexyl) Isophthalate n (dioctyl isophthalate, DIOP) A primary plasticizer for PVC, most notable for low volatility and its resistance to marring by nitrocellulose lacquers, in addition to good general-purpose properties. It is also compatible with polyvinyl butyral, vinyl chloride-acetate copolymers, cellulosic resins, polystyrene, and chlorinated rubber. 

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