Rubber grade stearic acid

Rubber-grade "stearic acid is usually a mixture of stearic acid (a Cl8 saturated fatty acid) and palmitic acid (a Cl6 saturated fatty acid) usually with a very small amount of oleic acid (a Cl8 fatty acid with one unsaturated site per molecule). Just as zinc oxide is ubiquitous in rubber recipes, so is rubber-grade stearic acid. Stearic acid and zinc oxide are almost always used together in rubber compounding. After these two ingredients are mixed in the rubber stock, they react with each other to solubilize the zinc (ion) into the rubber so that it will initiate the vulcanization process. [Pg.261]

Rubber-grade stearic acid Stearic acid... [Pg.262]

Figure 12.151 Production process for rubber grade stearic acid...

Cure Characteristics. Methods of natural rubber production and raw material properties vary from factory to factory and area to area. Consequentiy, the cure characteristics of natural mbber can vary, even within a particular grade. Factors such as maturation, method and pH of coagulation, preservatives, dry mbber content and viscosity-stabilizing agents, eg, hydroxylamine-neutral sulfate, influence the cure characteristics of natural mbber. Therefore the consistency of cure for different grades of mbber is determined from compounds mixed to the ACSl formulation (27). The ACSl formulation is as follows natural mbber, 100 stearic acid, 0.5 zinc oxide, 6.0 sulfur, 3.5 and 2-mercaptobenzothiazole (MBT), 0.5. [Pg.269]

Stearic Acid RG (rubber grade) Akrochem Corporation... [Pg.312]

Calcene [PPG]. TM for a specially prepared precipitated calcium carbonate for use in compounding rubber, paints, and plastics. The particles of grade TM are coated with stearic acid to aid in dispersion. Grade NC is not coated. [Pg.213]

Akrochem Retarder BA Akrochem Retarder BAX. See Benzoic acid Akrochem Rubbermakers Sulfur. See Sulfur Akrochem Rubbers RS-120r, Akrochem Rubbers RS-150] Akrochem Rubbers RS-200. See Silica, amorphous Akrochem Silicone Emulsion 1M, Akrochem Silicone Emulsion 10M. See SEM 209, Akrochem Silicone Emulsion 60M. See SEM 210, Akrochem Silicone Emulsion 100. See SEM 203, Akrochem Silicone Emulsion 350 Cone., Akrochem Silicone Emulsion 350. See SEM 204. See Polydimethylsiloxane Akrochem Stearic Acid, Rubber Grade. See Stearic acid... [Pg.130]

Both the ground and precipitated calcium carbonates can by treated with stearic acid to control water absorption, improve dispersabUity, and promote better wetting of the flUer by rubber. Silane treatment of these fillers is not effective. However, there is an ultra-fine grade coated with carboxylated polybutadiene, which reactively links to the particle surfaces. Such treated ultra-fine products can give reinforcement of about the same level of the semireinforcing thermal carbon blacks. [Pg.286]

Rubber grades of stearic acid are defined in ASTM D4817. This standard defines five different grades of stearic acid (which are actually grades based on blends of stearic, palmitic, and oleic acids in different proportions). [Pg.262]

Materials. Natural rubber (NR) was kindly supplied by Malaysian Rubber (Berhad, Malaysia) under the trade name CV60 (Mooney viscosity ML(1 + 4) 100 °C = 60). The compounding ingredients were all commercial grades and were added to the rubber. The curing system employed expressed as parts per hundred parts of rubber (phr) was sulphur (2.5), zinc oxide (5), stearic acid (1) and MBTS (benzothyazyl disulfide) (1). [Pg.58]

Rubber grade zinc oxide can be surface modified, usually by the deposition of 0.2 to 0.4% of stearic acid, propionic acid, or light oil to facilitate mixing (see Section 7.2). [Pg.31]

Regulatory EP compliance Properties Low color and odor Akrochem Stearic Acid, Rubber Grade [Akrochem]... [Pg.68]

Chem. Descrip. Hydrogenated stearic acid, rubber grade Uses Intermediate, process aid in alkyd resins, rubber compding., water repellents, polishes, soaps, abrasives, cutting oils, candles, crayons, emulsifiers activator, plasticizer, softener, process aid for rubbers (mod. reinforcement, good disp.) dispersant for pigments and fillers... [Pg.580]

Chem. Descrip. Stearic acid, rubber grade CAS 57-11-4 EINECS/ELINCS 200-313-4... [Pg.839]

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