VINYL TOLUENE COPOLYMER

Piccotex Vinyl-toluene copolymers Pennsylvania Industrial Chemical... 

Fig. 13. Polyken Tack of Various Acrylic Latexes Tackified with Emulsions of Either an a-Methyl Styrene/Styrene Copolymer or an a-Methyl Sty-rene/Vinyl Toluene Copolymer...

Fig. 14. Quick Stick, Peel and Shrear Adhesion of an Emulsion of an a-Methyl Styrene/Vinyl Toluene Copolymer Resin with Acrylic Latex C...

Table 8. Ion-Tolerant Emulsion of a a-Methyl-Styrene/ Vinyl Toluene Copolymer in Combination with Acrylic Latpv...

Tackifiers with aromatic content, particularly a-methyl styrene and vinyl toluene copolymers and coumarone-indene resins, are of significant industrial value. 

These comprise components A to C, the amount of component B being 5 to 50 pbw per 100 pbw of A (based on solid content) and the amount of C being 50 to 350 pbw per 100 pbw of A (based on solid content). A is an emulsion of ethylene-vinyl ester copolymer, which is composed of 5 to 35 wt.% of ethylene and 95 to 65 wt.% of vinyl ester, and has a Tg of -25 to -I-15C and a toluene-insoluble part of 30 wt.% or more. B is a thermal expansive hollow microbead and C is an inorganic filler. The emulsion has superior mechanical strength, crack resistance, water resistance, alkali resistance, blocking resistance, foaming property, embossing property and superior flame resistance and can be used for flameproof foam sheet for wallpaper. 

A thermosetting appliance enamel consists of a terpolymer comprising about 72 parts of vinyl toluene (70/40 meta/para) with about 20 parts of ethyl acrylate (to reduce brittleness of the copolymer) and 8 parts of an acidic vinyl comonomer. The acid is incorporated in the copolymer to provide sites for subsequent cross-linking with a diepoxide. It seems reasonable to expect that grease and slain resistance of the cross-linked enamel will be enhanced if the cross-links are not clustered and almost all initial polymer molecules contain at least one or a few cross-linking sites. To achieve this in a batch copolymerization, what are the best reactivity ratios (approximately) of the major component (vinyl toluene) and the vinyl acid comonomer Show you reasoning. 

Similar to the case of styrene, the copolymers of alkylstyrenes and arylstyrenes are common. The copolymerization is done for the same purposes as for polystyrene, namely to improve/modify certain properties. Copolymerization with divinylbenzene is probably the most frequently utilized. This copolymerization improves mechanical resistance, decreases solubility, and improves thermal resistance. For example, thermal decomposition of poly(vinyltoluene-co-divinyl benzene) 10-50% DVB starts at a higher temperature than that of poly(vinyl toluene). The decomposition at 560° C generates C1-C4 hydrocarbons, benzene, toluene, ethylbenzene, styrene, ethyltoluene, a-methylstyrene, vinyltoluene, divinylbenzene, naphthalene, and ethylstyrene, with a distribution that varies with copolymer composition [71, 118]. 

Figure 25. Solubility characteristics of a medium-high molecular weight vinyl chloride-vinyl acetate copolymer (FPC 450) in ketone/toluene blends at 15 wt % solids (Brookfield LVF viscometer)...

Magnetic tapes are usually coated with coatings from solvents, such as methyl ethyl ketone, methyl isobutyl ketone, and toluene. Aqueous replacements can eliminate all or nearly all of the solvents.352 One system used iron oxide in a blend of a polyurethane and ethylene-vinyl chloride copolymer emulsions thickened with hydroxyethyl cellulose, which was cross-linked with a melamine-formaldehyde resin. Coating was done at line speeds of 100 m/min. The whole system proved to be 15% cheaper than coating from solvent. In another system, traces of methanol are evolved on drying and would have to be captured. This replaces a line where 600 kg/h of solvent would have to be recovered and recycled. 

Beiner et al. modified a divinylbenzene/A-vinyl pyrrolidone copolymer, containing sulfonic acid groups, with several metal ions. The modified cation-exchange material was used for the extraction of thiols, sulfides, and methyl thiophosphates from water samples, with LODs in the upper ng/1 range after elution with a CSi/toluene mixture and analysis by GC/MS. 

OTHER COMMENTS used during the application of specialty paints and varnishes used during spray applications of vinyl toluene polyester surface coatings chemical intermediate for unsaturated polyester resins useful in the preparation of copolymers with drying oils for surface coatings. 

Toluene [108-88-3] is mainly used in cellulose nitrate lacquers in heat-curing paints based on urea-, melamine-, or phenol - formaldehyde resins in alkyd resin paints and in paints based on chlorinated rubber, polystyrene, polyacrylates, or poly(vinyl acetate). Mixtures of toluene with esters are used to dissolve vinyl chloride copolymers and postchlorinated poly(vinyl chloride) [14.265]. 

Chem. Descrip. Vinyl-toluene/butadiene emulsion copolymer Uses Film-former for solv.-based traffic paints, block fillers, paper coatings, adhesives, laminates, printing inks, hot melts, abrasion-resist, coatings, masonry and concrete paints, waterproof coatings Features Produces films with clarity, str., hardness and chem. resist. Properties Sol. in aromatic soivs., aliphatic blends, chlorinated HC, esters, ketones sp.gr. 1.026 dens. 8.56 Ib/gal ref. index 1.57 hardness (Sward) 20 (24 h) dissip. factor 0.0010 (100 Hz) dielec, const. 2.58 (100 Hz) vol. resist. 6.97 xIO ohm-cm Pliolite VTAC [Goodyear]... 

Chem. Descrip. Vinyl-toluene/acrylate emulsion copolymer Uses Resin for solv.-based coatings, waterproof texture and masonry coatings, intumescent fire-retardant paints, concrete curing membranes and sealers, paper coatings, gloss overlacquers, silk screen inks, dry electrophotographic toners... 

Chem. Desap. Styrene/vinyl toluene-modified alkyd copolymer (linseed oil type) in VM P naptha (HAPS-free)... 

Carboset 525 Carboset 531 Carboset XL-11 tqiattm AE 4625 Piolofonn BL 16 Piolafann BL 18 Piolafann BN 18 Pkilofonn BR18 PVP Sipomer COPS 1 VInyl-toluene/liuladiene copolymer... 

Vinyl-terminated polydimethylsiloxane. See Polydimethylsiloxane, vinyl-terminated Vinyl-terminated trifluoropropylmethylsilxoane-dimethylsiloxane copolymer. See Polymethyl-3,3,3-trifluoropropylsiloxane-dimethylsiloxane copolymer, vinyl-terminated Vinyl toluene Vinyl toluene, inhibited (mixed isomers) 3- and 4-Vinyl toluene (mixed isomers). See Vinyltoluene monomer Vinyltoluene monomer CAS 25013-15-4 EINECS/ELINCS 246-562-2 UN 2618 (DOT)... 

Stannous oleate Stearyl alcohol Styrene/MA copolymer Terpene resin Tetrahydrofuran Titanium dioxide Toluene Tosylamide/formaldehyde resin Triethylene glycol Urea-formaldehyde resin Vinylidene chloride/acrylonitrile copolymer Vinylidene chloride/methyl acrylate copolymer Vinylidene chloride/vinyl chloride copolymer Zinc laurate cellophane, food-contact Aluminum stearates Ammonium tallate Hexamethoxymethylmelamine Nonoxynol-55 Nonoxynol-70... 

Sodium polyacrylate Sodium xylenesulfonate Styrene/allyl alcohol copolymer Toluene VA/crotonates/vinyl propionate copolymer Xylene Zinc stearate paper/paperboard, food packaging Methyl acrylate polymer Styrene/butadiene polymer... 

Vinyl chloride/vinyl acetate copolymer rigid compounds, records Vinyl chloride/vinyl acetate copolymer rigid compounds, stencils Vinyl chloride/vinyl acetate copolymer rigid PU foam comonomer Tribromoneopentyl alcohol rigid PU foam mfg. insulation Toluene-2,6-diisocyanate rinsing aid... 

Fig. 13 exhibits the type of probe tack which can be obtained using either an emulsion of a copolymer of a-methyl-styrene and vinyl toluene or an emulsion of a copolymer of a-methyl-styrene and styrene with two different acrylic polymers. The two polymers represent significant differences in inherent tack properties, yet both resins show improvements in tack with up to 50 phr resin. 

Fig. 14 represents what can be achieved using an emulsion of the copolymer resin of a-methyl-styrene and vinyl toluene with an acrylic having relatively high inherent tack and peel such as Acrylic Latex C. In this case, reinforcement is obtained in shear adhesion. 

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