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Gums, composition

M. H. Yeh. Compositions based on cationic polymers and anionic xanthan gum (compositions a base de polymeres cationiques et de gomme xanthane anionique). Patent EP 654482, 1995. [Pg.478]

Hyodo, M., Fujimoto, K., Abe, S. and Tokizane, M., Chewing gum composition. United States Patent, US6537595B1, 2003. [Pg.180]

PO006 Sander, E. H. Psylium-hydrocolloid gum compositions and fiber supplements. Paten-Can Pat Appl-2,100,295 1994 17 p. [Pg.431]

A classical application of PIB is a chewing gum. There are still innovations in this topic. Chewing gum base compositions that produce gum bases and chewing gums having reduced adhesion to outdoor surfaces as compared to typical chewing gum compositions have been recently developed (81). [Pg.174]

There have been attempts in the past to formulate removable chewing gum bases and chewing gum compositions. For example, a non-stick chewing gum may contain a blend of different molecular weight poly(vinyl acetate), filler, non-elastomer solvent resin, and is essentially free of fats and waxes (82). In Table 6.8 a chewing gum cud formulation is given, which can be easily removed from surfaces. [Pg.175]

D. Phillips, C. Shen, M. Reed, and M. Patel, Chewing gum base and chewing gum compositions, US Patent 6986907, assigned to Wm. Wrigley Jr. Company (Chicago, IL), January 17, 2006. [Pg.186]

Rao, M.S., Kanatt, S.R., Chawla, S.P., Sharme, A. Chitosan and guar gum composite films Preparation, physical, mechanical and antimicrobial properties. Carbohydr. Polym. 82, 1243— 1247 (2010)... [Pg.335]

Uses Tackifier in adhesives modifier resin in mbber compds., in hot-melt coatings, laminations, films, wax modification masticatoiy agent in chewing gum compositions Features Thermoplastic... [Pg.630]

Comollo, A.J., 1966. Adhesive chewing gum, compositions and methods for preparing same. US3255018 A. [Pg.395]

Andersen, C. and Pedersen, M., Chewing gum composition with accelerated, controlled release of active agents. U.S. Patent 5487902. [Pg.468]

It was established that catalysts present in CNTs also strongly affect thermal stability of CNTs in air. Active metal particles present in the nanotube samples catalyze carbon oxidation, so the amount of metal impurity in the sample can have a considerable influence on the thermal stability. For example, Zhou et al. (2001) found that if the oxidation of as-synthesized CNTs, which contained traces of catalyst (Fe), was quite rapid and homogeneous at 350 °C due to the catalytic effect, the purified CNTs had negligible weight loss, even after annealing at 460 °C. Furthermore, the presence of Fe obscured the dependence of oxidative stability on tube diameter as discussed earlier. After removing the Fe, all tubes were more appropriate for observing diameter-dependent oxidative stability. Li et al. (2011) have found that the presence of cobalt catalysts dramatically decreases the thermal stability of CNT/peroxide-curable methyl phenyl silicone gum composites as well. This means that the presence of uncontrolled impurities in CNTs can be one of the reasons for reduced reproducibility of sensor parameters. This conclusion is confirmed by results obtained by Boccaleri et al. (2006) and Zhou et al. (2001) (see Fig. 21.5). [Pg.306]

Rao MS, Kanatt SR, Chawla SP, Sharma A (2010) Chitosan and gum gum composite films preparation, physical, mechanical and antimicrobial properties. Carbohyd Polym 82(4) 1243-1247. doi 10.1016/j.carbpol.2010.06.058... [Pg.233]

The properties required by jet engines are linked to the combustion process particular to aviation engines. They must have an excellent cold behavior down to -50°C, a chemical composition which results in a low radiation flame that avoids carbon deposition on the walls, a low level of contaminants such as sediment, water and gums, in order to avoid problems during the airport storage and handling phase. [Pg.178]

Dichromated Resists. The first compositions widely used as photoresists combine a photosensitive dichromate salt (usually ammonium dichromate) with a water-soluble polymer of biologic origin such as gelatin, egg albumin (proteins), or gum arabic (a starch). Later, synthetic polymers such as poly(vinyl alcohol) also were used (11,12). Irradiation with uv light (X in the range of 360—380 nm using, for example, a carbon arc lamp) leads to photoinitiated oxidation of the polymer and reduction of dichromate to Ct(III). The photoinduced chemistry renders exposed areas insoluble in aqueous developing solutions. The photochemical mechanism of dichromate sensitization of PVA (summarized in Fig. 3) has been studied in detail (13). [Pg.115]

Psyllium Seed Gum. PsyUium seed gum [8036-16-9] is derived from plants of the genus Plantago several species of which are used as commercial sources. However, most current production is from Plantago ovata grown in India. The gum is located in the coat which is removed by cracking. The gum is then extracted with boiling water and separated from the insoluble residue by filtration. It consists of mixtures of both neutral and acidic polysaccharides, the composition of which is species dependent (66). [Pg.435]

Applications. The high heat tolerance and good salt compatibiUty of welan gum indicate its potential for use as an additive in several aspects of oil and natural gas recovery. Welan also has suspension properties superior to xanthan gum, which is desirable in oil-field drilling operations and hydraulic fracturing projects. It is compatible with ethylene glycol, and a welan—ethylene glycol composition that forms a viscous material useful in the formulation of insulating materials has been described (244). [Pg.299]

The most commonly used polymers are partially hydrolyzed polyacrylamides (32). The optimum degree of hydrolysis depends on the apphcation, injection water composition, and reservoir conditions (33,34). More salt-tolerant acrylamide copolymers may permit this technology in higher salinity injection water (35). Eield apphcations of cross-linked xanthan gum have also been reported (36). [Pg.190]

Pyrotechnic mixtures may also contain additional components that are added to modify the bum rate, enhance the pyrotechnic effect, or serve as a binder to maintain the homogeneity of the blended mixture and provide mechanical strength when the composition is pressed or consoHdated into a tube or other container. These additional components may also function as oxidizers or fuels in the composition, and it can be anticipated that the heat output, bum rate, and ignition sensitivity may all be affected by the addition of another component to a pyrotechnic composition. An example of an additional component is the use of a catalyst, such as iron oxide, to enhance the decomposition rate of ammonium perchlorate. Diatomaceous earth or coarse sawdust may be used to slow up the bum rate of a composition, or magnesium carbonate (an acid neutralizer) may be added to help stabilize mixtures that contain an acid-sensitive component such as potassium chlorate. Binders include such materials as dextrin (partially hydrolyzed starch), various gums, and assorted polymers such as poly(vinyl alcohol), epoxies, and polyesters. Polybutadiene mbber binders are widely used as fuels and binders in the soHd propellant industry. The production of colored flames is enhanced by the presence of chlorine atoms in the pyrotechnic flame, so chlorine donors such as poly(vinyl chloride) or chlorinated mbber are often added to color-producing compositions, where they also serve as fuels. [Pg.347]

Neoprenes. Of the synthetic latices, a type that can be processed similarly to natural mbber latex and is adaptable to dipped product manufacture, is neoprene (polychloroprene). Neoprene latices exhibit poor initial wet gel strength, particularly in coagulant dipped work, but the end products can be made with high gum tensile strength, oil and aUphatic solvent resistance, good aging properties, and flame resistance. There are several types of neoprene latex, available at moderately high (ca 50 wt %) and medium soHds content. Differences in composition between the types include the polymer s microstmcture, eg, gel or sol, the type of stablizer, and the total soHds content (Table 22). [Pg.255]

Starch pyrodextrins and British gums have the abiUty, in aqueous dispersion, to form films capable of bonding like or unlike materials. Thus, they have uses as adhesives for envelopes, postage stamps, and other products. These dextrins are used in glass-fiber siting to protect the extmded fiber from abrasion, and as binders for metal core castings, water color paints, briquettes, and many other composite materials (qv). [Pg.346]

Linalool has been used to prepare a mixture of terpenes useful for enhancing the aroma or taste of foodstuffs, chewing gums, and perfume compositions. Aqueous citric acid reaction at 100°C converts the linalool (3) to a complex mixture. A few of the components include a-terpineol (34%) (9), Bois de Rose oxide (5.1%) (64), ocimene quintoxide (0.5%) (65), linalool oxide (0.3%) (66), tij -ocimenol (3.28%) (67), and many other alcohols and hydrocarbons (131). [Pg.421]

Base-plate wax compositions are generally regarded as trade secrets. A substantial percentage of paraffin is usually present, probably 50—80 wt %. Beeswax [8012-89-3] camauba wax [8015-86-9] ceresin, microcrystalline waxes, Acrawax C (Glyco Products Co. Inc.), mastic gum, rosin [8050-09-7] and synthetic resins may make up the balance of the formulation. Base-plate waxes are generally sold in sheet form about 1.3 mm thick, 75 mm wide, and 140 mm long. [Pg.480]

The compositions of sheet and shape waxes are also trade secrets. However, they are blends of various proportions of paraffin, microcrystalline waxes, camauba wax, ceresin, beeswax, gum dammar, mastic gum, and possibly other resins. Sheet waxes are marketed in square sheets approximately 80 by 90 mm. Various thicknesses are available from 32 gauge (0.5 mm) to 14 gauge (1.63 mm). [Pg.480]

Table 4 Hsts flow properties of a set of impression waxes the exact compositions of which are trade secrets. The materials that have been identified in the compositions are paraffin, ceresin, vegetable waxes, rosin, mastic gum, and spermaceti. Table 4 Hsts flow properties of a set of impression waxes the exact compositions of which are trade secrets. The materials that have been identified in the compositions are paraffin, ceresin, vegetable waxes, rosin, mastic gum, and spermaceti.
Commercial Forms. Eour different base polymers of VAMAC ethylene—acryhc elastomer are commercially available (Table 1). Until 1990, existing grades of ethylene—acryhc elastomers were based on a single-gum polymer. VAMAC G, defined as a terpolymer of 55% methyl acrylate, ethylene, and a cure-site monomer (5). In 1991, a higher methyl acrylate terpolymer, VAMAC LS, was introduced. The composition of this polymer was specifically chosen because it significantly increases the oil resistance of the polymer while minimizing losses in low temperature fiexibihty (6). [Pg.498]

The resin acids found in rosins are generally of the abietic- and pimaric-type. Rosins of various pine species differ in their content of abietic vs. pimaric-type acids. Rosins from species exhibiting high abietic-type acid compositions are preferred for production of rosin derivatives. However, the differences in properties of rosins are often associated with their non-resin acid content instead of their chemical compositions. On the other hand, the compositions of rosins from different sources greatly differ [22]. Table 8 shows a typical distribution of resin acids in rosins obtained from gum, tall oil and wood sources. [Pg.601]

Gum turpentine is obtained from wounding living trees to get an exudate containing turpentine and rosin. Turpentine is separated from the rosin by continuous steam distillation and further fractionation. Wood turpentine comes from the extraction of stumps of pine trees using naphtha, and subsequent separation of rosin and turpentine by fractional distillation. Tail-oil turpentine is a byproduct of the Kraft sulphate paper manufacture. Terpenes are isolated from the sulphate terpentine and separated from the black digestion liquor. The composition of turpentine oils depends on its source, although a-pinene and p-pinene are the major components. [Pg.610]


See other pages where Gums, composition is mentioned: [Pg.365]    [Pg.1119]    [Pg.246]    [Pg.426]    [Pg.70]    [Pg.365]    [Pg.1119]    [Pg.246]    [Pg.426]    [Pg.70]    [Pg.234]    [Pg.23]    [Pg.357]    [Pg.183]    [Pg.434]    [Pg.450]    [Pg.313]    [Pg.298]    [Pg.57]    [Pg.487]    [Pg.470]    [Pg.69]    [Pg.73]    [Pg.127]    [Pg.352]    [Pg.1009]   
See also in sourсe #XX -- [ Pg.243 ]




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