Synthesis of palm oil-base zinc stearate and its application on manufacture of rubber component

Abstract

Palm oil-based zinc stearate synthesis process has been developed. Palm oil-based stearic acid and zinc oxide were used as material. The synthesis was performed using an oil-jacketed reactor with a capacity of 50 kg per batch. The reaction was occurring at 950C with atmospheric pressure and it took place about 10 minutes. The product characteristics was powder with a white appearance, 0.0 - 0.3 % fatty acid content, 0.2 - 1% moisture content, 118 – 1250C melting point and 0.5 - 1.1 g/cm3 specific gravity. The product of zinc stearate was also examined on an application of rubber component production process. Effects of using the zinc stearate to characteristics of the rubber component were tested. The characteristics included elongation, hardness and tensile strength of the rubber component. Application of 5 phr of zinc stearate on rubber component formulation showed that the rubber component processed using the zinc stearate has basic characteristic that meet the standard of rubber component of American Chemical Society (ACS) 1.

Characterization of Natural Rubber, Styrene Butadiene Rubber, and Nitrile Butadiene Rubber Monomer Blend Composites Loaded with Zinc Stearate to Be Used in the Solid Tire Industry

“…As with the VBP-03 formula, an increase in the ratio of ZS 7.00 phr to weight occurred as NR decreased to 0.428% and SBR and NBR decreased to 0.434% from the weight of the previous material (VBP-02). According to Setianto et al [20], the specific gravity of ZS from BPPT used in this study was 1.1 g/cm 3 . Increases in the ZS ratio in the same volume and space, taking into account the specific gravity, led to increases in the specific gravity of rubber vulcanizate.…”

“…They also included styrene butadiene rubber (SBR-1502) specific gravity of 1.6-1.7 g/cm 3 , hardness: 70-80 Shore A, tensile strength: 2-2.5 Mpa, and elongation at break: 300-400% (place of origin: China); nitrile butadiene rubber (NBR-2665, place of origin: Russian Federation); zinc oxide (ZnO) with a purity of 99.7% (place of origin: Hebei, China); and stearic acid (SA) Mf: C 18 H 36 O 2 with a purity of 99% (place of origin: China). Zinc stearate (ZS) with a moisture content of 0.2-1%, 118, a specific gravity of 1.1 g/cm 3 , the fatty acid content of 0.0-0.3%, and a melting point of 125 • C was also used [20] (ZS place of origin: Agency for the Assessment and Application of Technology, Indonesia (BPPT)). Kaolin 400 mesh (place of origin: Tanjung Pandan Belitung, Indonesia); glycol (PEG-4000) with a purity of 99% (place of origin: China); carbon black N330 with a purity of 99.9% (place of origin: Henan, China); CaCO 3 400 mesh (place of origin: Indonesia); silica oxide (SiO 2 ) with a purity of 96.0% (place of origin: Indonesia); resin coumarone indene Mf: C 90 , Cas no.…”