However, such studies have only focused on conventional monomodal latexes, and not on bimodal latex dispersions.
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Extraction of latex from a tree, for use in rubber production Latex is a stable dispersion (emulsion) of polymer microparticles in water. Latexes are found in nature, but synthetic latexes are common as well. Latex as found in nature is a milky fluid found in 10% of all flowering plants (angiosperms). It is a complex emulsion consisting of proteins, alkaloids, starches, sugars, oils, tannins, resins, and gums that coagulate on exposure to air.
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Alkyl-substituted pyridines show widespread uses among multiple fields of applied chemistry, including the polymer and pharmaceutical industries. For example, 2-methylpyridine, 4-methylpyridine and 2-ethyl-5-methylpyridine exhibit widespread use in syntheses of latexes, ion-exchange matrixes, and photography materials.
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Emulsions are used to manufacture polymer dispersions – polymer production in an emulsion 'phase' has a number of process advantages, including prevention of coagulation of product. Products produced by such polymerisations may be used as the emulsions – products including primary components for glues and paints. Synthetic latexes (rubbers) are also produced by this process.
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In 1985, she was issued a patent entitled "Stable latexes containing phosphorus surface groups" describing a method of preparing a paper coating composition comprising the addition of from about 2 to about 30 percent of a modified latex containing phosphorus surface groups. In 1986, she was issued a follow-up patent entitled "Composite sheet prepared with stable latexes containing phosphorus surface groups" also employing emulsion polymerization techniques for preparing modified latex. In 1990, Dr. Greene was issued a patent entitled "Latex based adhesive prepared by emulsion polymerization" for the invention of a latex based pressure sensitive adhesive for coating conventional substrates to form an adhesive tape. After decades of contribution to the science of polymers, she passed away in Midland on June 16 1995.
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For example, fibers for clothing, wood for shelter and warmth. Biodiversity may be a source of energy (such as biomass). Other industrial products are oils, lubricants, perfumes, fragrances, dyes, paper, waxes, rubber, latexes, resins, poisons, and cork, which can all be derived from various plant species. Supplies from animal origin include wool, silk, fur, leather, lubricants, and waxes.
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Irrigation can be used to keep soil moist between natural rainfalls. Fugitive dust can be controlled by the application of various chemical suppressants including lignin sulfonates, petroleum resins, latexes, salts, plastics, and wetting agents. Coal dust piles have been treated with water or other chemical surfactants to suppress dust until the moisture evaporates. Other chemicals can provide protection for up to six months.
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Upon heating, itaconic anhydride isomerizes to citraconic acid anhydride, which can be hydrolyzed to citraconic acid (2-methylmaleic acid). Steps in conversion of citric acid to citraconic acid via itaconic and aconitic acids. Partial hydrogenation of itaconic acid over Raney nickel affords 2-methylsuccinic acid. Itaconic acid is primarily used as a co-monomer in the production of acrylonitrile butadiene styrene and acrylate latexes with applications in the paper and architectural coating industry.
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Polymer cement mortars (PCM) are the materials which are made by partially replacing the cement hydrate binders of conventional cement mortar with polymers. The polymeric admixtures include latexes or emulsions, redispersible polymer powders, water- soluble polymers, liquid thermoset resins and monomers. Polymer mortar has low permeability that may be detrimental to moisture accumulation when used to repair a traditional brick, block or stone wall. It is mainly designed for repairing concrete structures.
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Because of its preference for dense forests, it acts as a good indicator of the ecosystem's health. The species acts as an important seed disperser and pollinator, as well as a prey item for several carnivores. The Bengal slow loris feeds on plant exudates such as sap, gums, resins, and latexes, particularly those from the family Fabaceae. Even though the species does not have keeled nails, it will scrape the plant, actively breaking its surface; this behavior resembles that of marmosets and the fork-marked lemurs.
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7–12 September 1997, Essen, Germany. V. 1. P.535-538.Investigation of laws of selective flocculation of coals with syn- thetic latexes / P. V. Sergeev, V. S. Biletskyy // ICCS’97. 7–12 September 1997, Essen, Germany. V. 1. p. 503-506.C.-W. Fan, R. Markuszewski, and T. D. Wheelock, "Oil Agglomeration of Coal in Salt Solutions: Effects of Hydrophobicity and Other Parameters on Coal Recovery"Beletskyi V., Shendrik T. Ennobling of salty coals by means of oil agglomeration Technical and Geoinformational Systems in Mining.
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Latex from the chicle and jelutong trees was used in chewing gum. Dried latex from the opium poppy is called opium, the source of several useful analgesic alkaloids such as codeine, thebaine, and morphine, the latter two of which can then further be used in the synthesis and manufacture of other (typically stronger) opioids for medicinal use, and of heroin for the illegal drug trade. The opium poppy is also the source of medically useful non-analgesic alkaloids, such as papaverine and noscapine. Synthetic latexes are used in coatings (e.g.
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Some people only experience a mild allergy when exposed to latex, like eczema, contact dermatitis or developing a rash. Others have a serious latex allergy, and exposure to latex products such as latex gloves can cause anaphylactic shock. Guayule latex has only 2% of the levels of protein found in Hevea latexes, and is being researched as a lower-allergen substitute. Additionally, chemical processes may be employed to reduce the amount of antigenic protein in Hevea latex, yielding alternative materials such as Vytex Natural Rubber Latex which provide significantly reduced exposure to latex allergens.
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Coated paper (also known as enamel paper, gloss paper, and slick paper) is paper that has been coated by a mixture of materials or a polymer to impart certain qualities to the paper, including weight, surface gloss, smoothness, or reduced ink absorbency. Various materials, including kaolinite, calcium carbonate, bentonite, and talc, can be used to coat paper for high-quality printing used in the packaging industry and in magazines. The chalk or china clay is bound to the paper with synthetic s, such as styrene-butadiene latexes and natural organic binders such as starch. The coating formulation may also contain chemical additives as dispersants, resins, or polyethylene to give water resistance and wet strength to the paper, or to protect against ultraviolet radiation.
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