Stearates plasticizers

Since the system is processed as thermoplastics are processed, its reprocessability was studied under repeated cycles of extrusion in the MPT. Results of reprocessability studies are shown in Table 5. It is evident that after the first cycle viscosity increased slightly, which may be due to the orientation effect. In the subsequent cycles viscosity remained almost constant. Therefore, it is concluded that the zinc stearate plasticized zinc salt of m-EPDM is melt processable just as thermoplastics. 

Nail varnish should offer a wide range of colours and textures, adhere fast to the nail, and not chip. It should also be water-resistant, but easy to remove with a non-hazardous solvent that does not damage the nail, the skin, or the environment. All these conditions have been met with a blend of colours, polymers, plasticizers, and solvents. Nail varnish contains a pigment or dye, plus nitrocellulose to provide a gloss, and butyl stearate plasticizer to keep the varnish flexible when it has... 

The effect of zinc stearate concentration on the melt flow of zinc, magnesium, and barium sulfonate-containing CR-2504 is shown in Figure 4. These results parallel those obtained with stearic acid plasticizer (cf. Table I). The zinc sulfonate EPDM responded most readily to zinc stearate plasticization. Although the melt flows of the magnesium and... 

It was noted earlied that the incorporation of metal sulfonate groups into EPDM resulted in enhanced water sensitivity. The response of the ionomer to water pick-up was a function of the metal cation borne by the sulfonate group (I). The incorporation of zinc stearate plasticizer into EPDM ionomers resulted in marked reductions in water absorption, and this is illustrated in Figure 7. In the absence of zinc stearate water absorptions of 30-80% were obtained for most cations while the lead and zinc cations absorbed about 10%. Zinc stearate markedly reduced water absorption for all metal cations. However, the zinc and lead cations yielded the lowest water absorptions. 

OTHER COMMENTS used as a solvent for nitrocellulose resins, spray lacquers, quickdrying lacquers, varnishes, enamels, varnish removers, and dry-cleaning compounds mutual solvent for soluble mineral oils to hold soap in solution, and to improve emulsification use to make acetate esters as well as phthalate and stearate plasticizers preferred coupling agent for many water-based coatings. 

Glycol stearate Hydroabietyl phthalate Isooctyl palmitate PEG-6 PEG-8 PEG-12 PEG-20 Propylene glycol stearate plasticizer, cellulose propionate Butyl benzyl phthalate plasticizer, cellulosics Acetyl tri butyl citrate Acetyl triethyl citrate Butyl acetoxystearate Butyl benzyl phthalate Butyl oleate... 

PEG-70 lanolin plasticizer, resins pigments Butoxyethyl stearate plasticizer, resins PVC plastisols... 

PEG di-2-ethylhexoate PEG-3 di-2-ethylhexoate PEG-2 stearate Phenolic resin Pine (Pinus palustris) tar Polybutene Soybean (Glycine soja) oil Tall oil acid Tall oil rosin Trioctyl phosphate plasticizer, rubber industrial Butoxyethyl stearate plasticizer, rubber magnetic tapes Butoxyethyl stearate plasticizer, rubberized fabrics Dibutyl tartrate plasticizer, rust inhibitors Butyl myristate plasticizer, SBR... 

Polymer compositions containing pentaerythritol are also used as secondary heat-, light-, and weather-resistant stabilizers with calcium, zinc, or barium salts, usually as the stearate, as the prime stabilizer. The polymers may be in plastic or fiber form (87—89). 

Typically, soHd stabilizers utilize natural saturated fatty acid ligands with chain lengths of Cg—C g. Ziac stearate [557-05-1/, ziac neodecanoate [27253-29-8] calcium stearate [1592-23-0] barium stearate [6865-35-6] and cadmium laurate [2605-44-9] are some examples. To complete the package, the soHd products also contain other soHd additives such as polyols, antioxidants, and lubricants. Liquid stabilizers can make use of metal soaps of oleic acid, tall oil acids, 2-ethyl-hexanoic acid, octylphenol, and nonylphenol. Barium bis(nonylphenate) [41157-58-8] ziac 2-ethyIhexanoate [136-53-8], cadmium 2-ethyIhexanoate [2420-98-6], and overbased barium tallate [68855-79-8] are normally used ia the Hquid formulations along with solubilizers such as plasticizers, phosphites, and/or epoxidized oils. The majority of the Hquid barium—cadmium formulations rely on barium nonylphenate as the source of that metal. There are even some mixed metal stabilizers suppHed as pastes. The U.S. FDA approved calcium—zinc stabilizers are good examples because they contain a mixture of calcium stearate and ziac stearate suspended ia epoxidized soya oil. Table 4 shows examples of typical mixed metal stabilizers. 

More than half the metal stearates produced in the United States are appHed as lubricants and heat stabili2ers (qv) in plastics, particularly in the processing of poly(vinyl chloride) (PVC) resins. 

Lubricants. Lubricants such as wax or calcium stearate reduce the viscosity of the molten plastic and improve forming characteristics. 

Thus, it can be concluded that in the present iono-mer system, zinc stearate plays a dual role. First, below its melting point it reinforces the matrix and strengthens the ionic aggregates and, second, at a higher temperature it results in solvation of the ionic aggregates and plasticizes the system, thus, facilitating the transition from the rubbery state to the viscous flow state [23]. 

Many plastics because they are organic are flammable incorporate flame-retardants. Additives that contain chlorine, bromine, phosphorous, metallic salts, and so forth reduce the likelihood that combustion will occur or spread. Lubricants like wax or calcium stearate reduce the viscosity of molten plastic... 

Solvent wiping. Rubbers tend to swell by application of solvents and the mechanical interlocking of the adhesive is favored. Although chlorinated hydrocarbon solvents are the most effective, they are toxic and cannot be used toluene and ketones are currently the most common solvents. The treatment with solvents is effective in the removal of processing oils and plasticizers in vulcanized mbbers, but zinc stearate is not completely removed and antiozonant wax gradually migrates to the mbber/polyurethane adhesive interface. Table 27.1 shows the moderate increase in adhesion produced in SBR by MEK wiping. 

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