Acetal plastics copolymer

EVA plastics Copolymers of elhene and vinyl acetate (vinyl elhanoaie). 

Figure 12.11 Pyrograms of a PVAc paint containing external plasticizers (a), and of a vinyl acetate/VeoVa copolymer (b). Peak assignments 1, acetic acid, 2, benzene, 3, butyl acetate, 4, butyl benzoate, 5, bis(2 methylpropyl) phthalate, 6, dibutylphthalate, 7, branched acrylates ranging from C7 to C9...

In addition to the polymer, copolymers of vinyl chloride with other vinyl monomers are important commercial plastics. Copolymers with vinyl acetate, which is produced from acetylene and acetic acid, are widely used in sheeting, surface coating, and filaments, being less brittle and more readily soluble in organic solvents than is pure polyvinyl chloride. Copolymers with acrylonitrile are also of importance for the production of... 

Dispersions of vinyl acetate-ethylene copolymers have been used with success in bonding plasticized and unplasticized poly(vinyl chloride). 

Film and foil adhesives based on internally plasticized copolymer adhesives have been suggested. For instance, vinyl acetate—ethylene or vinyl acetate—acrylate copolymers may be used for adhesion of films to porous surfaces. For metallic foil adhesion, copolymers containing carboxylate functionality are suggested. 

It has been found for the catalytic cracking of a plastic mixture consisting of LDPF and ethylene-vinyl acetate (FVA) copolymer (86/14 w/w), that nanometer sized HZSM-5 was more active at cracking this plastic mixture at 420° C than the mesoporous catalyst... 

The two pottant materials studied in this report are plasticized polyvinyl butyral (plPVB) which is easily available and used in safety glass, and a highly stabilized, peroxide crosslinked ethylene/vinyl acetate (EVA) copolymer containing about 33 weight % vinyl acetate (.7). The outer cover/insulator materials studied include polyvinyl fluoride (PVF) and a butyl aerylate/methyl methacrylate graft copolymer (BAgMMA) both are blown films. 

VLDPE provides flexibility previously available only in lower-strength materials, such as ethylene-vinyl acetate (EVA) copolymer (see later) and plasticized PVC, together with the toughness and broader operating temperature range of LLDPE. Its unique combination of properties makes VLDPE suited for a wide range of applications. 

Melt adhesives are based on thermoplastics, but usually contain a number of other components. The most commonly used melt adhesives are based on ethylene-vinyl acetate (EVA) copolymers, but polyethylene, polyesters, polyamides, and thermoplastic rubbers (e.g., styrene-butadiene block copolymers) are also used (see Adhesive Bonding of Plastics in Chapter 2). 

Chem. Descrip. Dioctyl maieate CAS 2915-53-9 EINECS/ELINCS 220-835-6 Uses Intermediate for surfactants and wetting agents in copoiymerization of PVC and vinyl acetates plasticizer for vinyl resins internal plasticizer in copolymer films also in latex paints, paper and textile coatings, adhesives... 

Hazardous Decomp. Prods. CO, CO2, acrid fumes NFPA Health 2, Flammability 3, Reactivity 2 Uses Monomer for synthesis of nitrile rubber, PVAc emulsions, PVOH, EVA copolymers, vinyl chloride-vinyl acetate copolymers, PVBI, and vinyl acetate-acrylonitrile copolymers in polymerized form for plastic masses, films, lacquers, latex paints, adhesives, textile finishing, safety glass interlayers textile hand modifier binder for paper coatings esterification for food starch modified film-former in cosmetics food pkg. adhesives resinous/polymeric food-contact coatings for polyolefin films food-contact paper/paperboard, ionomeric resins, copolymers, laminates, resin-bonded filters, textiles... 

Acrylonitrile-butadiene rubber, NBR, styrene-aciylonitrile rubber, SAN, ethylene-vinyl acetate copolymer, EVA, and acrylic copolymers are helpful modifications of polyvinylchloride that change its processing characteristics and elastomeric properties. Blending with these copolymers helps to reduce the requirement for low molecular weight plasticizers. Ethylene-vinyl acetate copolymer plays a role of high molecular weight plasticizer in production of vinyl hose. This reduces the amount of DOP used in flexible hose applications. Ethylene copolymer is used plasticize PVC that reduces gel. "" Phthalate plasticizers can be eliminated from water based adhesives because of utilization of vinyl acetate ethylene copolymer as a high molecular plasticizer/modifier. " ... 

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... 

Acetal Polyoxymethylene Copolymer - POM 2% Silicone Lubricated, azom.com Article ID 876. Source Plascams, Rubber and Plastics Research Association (RPRA). 

Thermoplastics used to blend with NR include PS, " polyamide 6, ethylene-vinyl acetate (EVA) copolymer, poly(methyl methacrylate) (PMMA), polypropylene (PP), low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE) " and high-density polyethylene (HDPE). To improve the properties of TPNR, modified NR is also used. ENR is the most frequently used modified NR. TPNR blends are prepared by blending NR and thermoplastics in various proportions. The role of rubber is to improve the impact strength and ductility of the plastic. Depending on the ratio, materials with a wide range of properties are obtained. The stiffness of the rubber is increased with the incorporation of plastic into the rubber matrix. The mechanical properties of TPNR again depend on the proportions of the rubber and thermoplastic components. The elastic properties of TPNR are considerably... 

Internally Plasticized n When a product is synthesized from a reaction involving two or more raw materials, it may be said to be internally plasticized if one of the raw materials is able to confer plasticity or flexibility to it. In other words, the product is plasticized because it is build up from a component which is naturally plastic. For example, an oil-modified alkyd, in which phthalic anhydride and glycerol are combined with drying oil fatty acids, is internally plasticized by reason of the presence of the fatty acid component. If a congo varnish were made by interaction of run congo and linseed oil monoglyceride, it could be described as internally plasticized, in contrast to a varnish made by simple dissolution of run Congo in linseed oil, which would be externally plasticized. Also a polyvinyl acetate-acrylic copolymer is internally plasticized while a polyvinyl acetate homopolymer, into which a plasticizer has been stirred, is externally plasticized. See Internal Plasticizer. 

Sealants and caulks based on vinyl acetate homo- and copolymers have been on the market since the late 1950s. Use of these lower-performance materials has been mostly in residential areas—bathtub caulking, wall tile joints, wallboard joints, etc. Latex caulks based on polyvinyl acetate plasticized with dibutyl phthalate, or on one of the newer vinyl acetate-acrylic emulsion copolymers, have the same ease of application as the acrylic emulsion caulks but are less flexible, harden on aging, and have inferior exterior durability. ... 

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