Additives for processing natural rubber and their application in small rubber plantations

Struktol Rubber Processing Additives Product Overview

Activator 73 A Activator 73 LM Multifunctional cure activators for the sulfur vulcanization of diene rubber, especially natural rubber. They can partly or totally replace conventional activators based on fatty acids (stearic acid, zinc stearate, and zinc 2-ethylhexanoate) and impart excellent reversion resistance. They can also be used as an effective physical peptizer for the mastication of na...

[Mutagenicity of organic rubber additives].

The DNA-damaging activities of organic rubber additives such as rubber vulcanizing agents, vulcanization accelerators and rubber anti-oxidants were investigated by the rec-assay using spores of Bacillus subtilis strains H 17 and M 45. For metabolic activation, 9,000 X g supernatant solutions of the liver homogenate of Sprague-Dawley male rats previously treated with aroclor 1,254 were used. Spo...

The Cyclization of Natural Rubber

The effects of solvent, temperature, time, weight percent of catalyst on the rate and mechanism of cyclization of natural rubber (NR) was studied in toluene and xylene solutions having tin tetra chloride catalyst (SnCl4). Iodometric titration show, with 8% SnCl4 (based on polymer weight) cyclization occurs, leaving 27.4% of the total unsaturation. Infrared spectra of c...

Soil organic carbon in pure rubber and tea-rubber plantations in South-western China

Abstract: Rubber tree (Hevea brasiliensis) plantation is a major land use practiced in Xishuangbanna of south-western China. Effects of rubber plantation (RP) and tea-rubber intercropping (TRI) systems on soil organic carbon pools were evaluated by recording changes in soil organic carbon in an age sequence of 12-, 20-, 26-, and 40-year old plantations. Labile organic carbon (LOC) increased in ...

Natural Rubber Latex Allergy