Vinyl alcohol-acetate resin

Man-made binders Bakelite resin, polyester resin, chlorinated rubber, polyvinyl chloride, Thiokol rubber, epoxy resin, Thiokol-epoxy blends, vinyl acetate alcohol resin (VAAR), Viton-A, Teflon and Kel-F800 etc. [Pg.335]

Vinyl Acetate Alcohol Resins These may be considered as a vinyl acetate/vinyl alcohol copolymers consisting of 82% vinyl acetate and 18% vinyl alcohol and is supplied as a solid dissolved in methyl alcohol (18%) and methyl acetate (82%) or technical grade methyl acetate. It is popularly known as VAAR. Military specification MIL-V-50433 (MU), July 1969 governs the quality of its solution for use in ammunition. [Pg.352]

Scheme 5.1 Synthesis of vinyl acetate alcohol resin (VAAR).

The alcohols, proprietary denatured ethyl alcohol and isopropyl alcohol, are commonly used for E-type inks. Many E-type inks benefit from the addition of small amounts of ethyl acetate, MEK, or normal propyl acetate to the solvent blends. Aromatic hydrocarbon solvents are used for M-type inks. Polystyrene resins are used to reduce the cost of top lacquers. T-type inks are also reduced with aromatic hydrocarbons. Acryflc resins are used to achieve specific properties for V-type inks. Vehicles containing vinyl chloride and vinyl acetate copolymer resins make up the vinyl ink category. Ketones are commonly used solvents for these inks. [Pg.252]

Poly(vinyl alcohol) used to manufacture the poly(vinyl acetal)s is made from poly(vinyl acetate) homopolymer (see Vinyl polymers, vinyl alcohol polymers Vinyl POLYMERS, vinyl acetate polymers). Hydrolysis of poly(vinyl acetate) homopolymer produces a polyol with predominandy 1,3-glycol units. The polyol also contains up to 2 wt % 1,2-glycol units that come from head-to-head bonding during the polymeri2ation of vinyl acetate monomer. Poly(vinyl acetate) hydrolysis is seldom complete, and for some appHcations, not desired. For example, commercial PVF resins may contain up to 13 wt % unhydroly2ed poly(vinyl acetate). Residual vinyl acetate units on the polymer help improve resin solubiHty and processibiHty (15). On the other hand, the poly(vinyl alcohol) preferred for commercial PVB resins has less than 3 wt % residual poly(vinyl acetate) units on the polymer chain. [Pg.449]

The thermal glass-transition temperatures of poly(vinyl acetal)s can be determined by dynamic mechanical analysis, differential scanning calorimetry, and nmr techniques (31). The thermal glass-transition temperature of poly(vinyl acetal) resins prepared from aliphatic aldehydes can be estimated from empirical relationships such as equation 1 where OH and OAc are the weight percent of vinyl alcohol and vinyl acetate units and C is the number of carbons in the chain derived from the aldehyde. The symbols with subscripts are the corresponding values for a standard (s) resin with known parameters (32). The formula accurately predicts that resin T increases as vinyl alcohol content increases, and decreases as vinyl acetate content and aldehyde carbon chain length increases. [Pg.450]

Poly(viayl alcohol) (PVA), a polyhydroxy polymer, is the largest-volume synthetic, water-soluble resin produced in the world. It is commercially manufactured by the hydrolysis of poly(vinyl acetate), because monomeric vinyl alcohol caimot be obtained in quantities and purity that makes polymerisation to poly(vinyl alcohol) feasible (1 3). [Pg.475]

PS PSF PSU PTFE PU PUR PVA PVAL PVB PVC PVCA PVDA PVDC PVDF PVF PVOH SAN SB SBC SBR SMA SMC TA TDI TEFE TPA UF ULDPE UP UR VLDPE ZNC Polystyrene Polysulfone (also PSU) Polysulfone (also PSF) Polytetrafluoroethylene Polyurethane Polyurethane Poly(vinyl acetate) Poly(vinyl alcohol) poly(vinyl butyrate) Poly(vinyl chloride) Poly(vinyl chloride-acetate) Poly(vinylidene acetate) Poly(vinylidene chloride) Poly(vinylidene fluoride) Poly(vinyl fluoride) Poly(vinyl alcohol) Styrene-acrylonitrile copolymer Styrene-butadiene copolymer Styrene block copolymer Styrene butadiene rubber Styrene-maleic anhydride (also SMC) Styrene-maleic anhydride (also SMA) Terephthalic acid (also TPA) Toluene diisocyanate Ethylene-tetrafluoroethylene copolymer Terephthalic acid (also TA) Urea formaldehyde Ultralow-density polyethylene Unsaturated polyester resin Urethane Very low-density polyethylene Ziegler-Natta catalyst... [Pg.960]

Vinyl acetate is used for the manufacture of poly(vinyl acetate) resins (Fig. 1), poly( vinyl alcohol), and poly (vinyl butyral). Poly (vinyl acetate) is used primarily in adhesives, coatings, and paints. Copolymers of poly (vinyl acetate) with poly (vinyl chloride) are used in flooring, phonograph... [Pg.540]

Poly(vinyl alcohol) is utilized as a component of starch-based adhesives.11121114 Other patents report the use of partially oxidized starch,1115 dextrins,1116 dextrins and urea,1117 borax,1118 boric acid,1119 and vinyl methyl ether-maleic acid copolymers.1120 Other patents indicate the use of poly (vinyl alcohol) with partially hydrolyzed poly(vinyl acetate),1121 nonhy-drolyzed poly(vinyl acetate),1122 and poly(vinyl chloride).1123 A few patents have reported such poly acrylic additives as poly (acrylic acid)1124 and its salts,1125 poly(acrylamide),1126 1127 A-methylacrylamide or poly(A-acryl-amide),1128 and polyethyleneimine.1129 Polystyrene has also been used,1130 as well as more complex copolymers such as a maleic acid monobutyl ester-methyl vinyl ether copolymer, together with dextrin and polyacrylamide),1131 carboxylated ethyl acrylate-styrene zinc salt copolymer,1132 ethylene-methyl acrylate-vinyl acetate copolymer,1133 vinyl acetate-vinyl pyr-rolidone copolymer,1134 and ethylene-vinyl acetate copolymer.1135 Some adhesives are compounded with SBR latex1136 1138 and phenol-formaldehyde resins.1139... [Pg.413]

When Candida rugosa lipase (formerly named Candida cylindracea lipase) was immobilized on an epoxy-activated resin it became resistant against acetaldehyde. Due to this immunization it could be repeatedly employed for the enantioselective acylation of secondary alcohols with vinyl acetate in dry organic solvents (Scheme 2.7) [78]. [Pg.35]

Adhesives may include styrene, styrene/isoprene blends, vinyl alcohol, vinyl acetate, epoxy resins, acrylates, cyanoacrylates (superglue), ethylene/vinylacetate (hot-melt), polyurethanes, etc. [19]. [Pg.172]

Petroleum resins, coumaroneindene resins, cellulose and cellulosics other than cellulose nitrate, polyesters, polyethers or acetal resins, polyolefins, polystyrene, poly(methyl methacrylate), poly(vinyl acetate/alcohol), etc. [Pg.375]

This section deals with paints based on vinyl resins (including vinyl copolymers) which are synthesized by polymerization of monomers containing terminal CH2 = CH groups. Polyolefins, poly(vinyl halides) and vinyl halide copolymers, poly(vinyl esters), poly(vinyl alcohol), poly(vinyl acetals), poly(vinyl ethers), and polystyrene are discussed. Polyacrylates (acrylic resins) are treated in Section 2.5. [Pg.23]

Two different industrial processes are used for preparations of the butyral. In both of them acetate-free poly(vinyl alcohol) is used. In the first one, 10% solutions of the starting material are treated with butyraldehyde and sulfuric acid. The mixtures are heated to 90 °C for one and a half hours and the products precipitate. They are neutralized, washed, and dried. In the second one poly(vinyl alcohol) is suspended in ethanol/ethyl acetate, and butyraldehyde together with a strong mineral acid are added. The solutions are then neutralized. The butyrals separate out. They are neutralized and the resin washed and dried. [Pg.434]

Polyvinyl alcohol resin. See Polyvinyl alcohol Polyvinyl butyral CAS 9003-62-7 63148-65-2 Synonyms Polyvinyl butyral resin PVB Vinyl acetal polymers, butyrals Vinyl acetyl polymers, butyrates... [Pg.3600]

Ketones are excellent solvents, used with up to 50% diluent (aromatic hydrocarbons) also esters like ethoxy-ethanol acetate are used. Vinyl resins cannot tolerate more than 10% alcohols. For stoving applications high-boilers like isophorone, DAA cyclohexanone and dibasic ester solvents are used. General examples are MEK or EEAc/xylene 1/1. [Pg.54]

The tacticity of hydroxyls in commercial poly(vinyl alcohol) is nominally atactic. However, an excess of cis-l,3-dioxane stereoisomers is formed during acetalization. Acetal formation depends strongly on process kinetics (24,25) and small quantities of other system components (26). During acetalization of poly(vinyl alcohol), for example, cis-acetalization is more rapid than trans-acetalization (27). In addition, the rate of hydrolysis of the trans-acetal is faster than for the more stable cis-acetal conformation (28). Because hydrolysis competes with acetalization during the acetalization process, a high cis/trans ratio is favored. The stereochemistry of PVF and PVB resins has been studied by proton and carbon NMR spectroscopy (29-32). [Pg.8835]

Most of the applications for vinyl acetate are mature. The strongest growth areas are in ethylene-vinyl alcohol, poly(vinyl butyral), and vinyl acetate-ethylene resins. Growth of use for ethylene-vinyl alcohol is expected at 10-15%/year through 2004. Poly(vinyl hutyral) is used in safety glass in automobile windshields. The U.S. market is mature for this use, hut has a potential as a replacement for tempered glass in Europe. A potential market exists for side and rear automobile windows worldwide (23). [Pg.8856]

EVAL resins are copolymers of ethylene and vinyl alcohol. Since vinyl alcohol does not exist in the free State, the raw materials for EVAL resins are ethylene and vinyl acetate. The basic chemical equations for the sjni-theses of EVAL resins are shown as follows ... [Pg.425]

Polyvinyl Acetate n A colorless, odorless, nontoxic, transparent, thermoplastic, water-insoluble, resinous high polymer derived from the polymerization of vinyl acetate with a catalyst used as a latex binder in certain paints and as an intermediate in the synthesis of polyvinyl acetal and polyvinyl alcohol. The major use is in water-based latex paints, adhesives, fabric finishes, and lacquers. In the plastics industry, the copolymers of vinyl acetate, particularly with vinyl chloride, are of most interest. Abbreviation for PVA and PVAc. [Pg.575]