GAK : Gummi, Fasern, Kunststoffe ; Fachmagazin für die Polymerindustrie
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A Comparison of Siloxane and Organic Additives in Filler Dispersion - The use of a novel masterbatch based on an ultra high molecular weight siloxane as dispersing agent for aluminium trihydroxide and calcium carbonate in LDPE yields significant improvements in the processing of filled compounds. The effect of calcium stearate, which also positively influences the dispersing of the mentioned fillers, is clearly surpassed by the performance of the siloxane. The influence of the siloxane on the dispersion of both fillers is not equal, and the authors believe the reason for this to be the different neighbourhood position of Ca, Al, and Si in the periodic table
Reactions of 2-t-Butylbenzothiazole Sulfenamide With Sulfur and Zinc Oxide in the Absence of Rubber - The interaction of sulphur, ZnO and 2-t-butylbenzothiazole sulfenamide (TBBS) was investigated by differential scanning calorimetry (DSC) in the absence of rubber. Special reference was made to the role of the amine, the distinguishing characteristic of all sulfenamides
Procedure to Determin the Content of Organic Silicon Compounds on the Surface of Elastomeric Sealants - Elastomeric moulded parts may contain organic silicon compounds.The application of those parts for the sealing of electronic component housings may impair the reliability of electric contacts inside. In order to prevent electronic components from malfunction quality control of elastomeric sealants is required. A procedure based on application of Electron Spectroscopy for Chemical Analysis (ESCA) is presented. It provides information on the silicon compounds on the surface of elastomeric sealants. Applying this procedure silicon in organic and inorganic compounds and this will be described with the help of an example. Finally, the measurement uncertainty of the procedure is briefly discussed
Miscibility of Blends of Saturated Hydrocarbon Elastomers - Over the last several years, a great deal of progress has been achieved in understanding the basic miscibility between saturated hydrocarbon polymers. This has mainly been accomplished through the use of neutron scattering, but also has benefited from the results from light scattering, PVT measurements and other techniques. This paper concentrates on the results with elastomers such as PIB and EPDM
Der Einsatz von Dialkyl-paraphenylendiamins von 2,4,6-tris-(N-1,4-Dimethyl-pentyl-p-phenylendiamin)1,3,5-triazin zur Erzielung einer langdauernden Ozonbeständigkeit
The Use of Dialkyl Paraphenylene Diamine or 2,4,6-tris-(N-1,4-Dimethyl Penthyl-p-Phenylene Diamine) 1, 3,5 Triazine for a Long Term Static Ozone Crack Resistance - Most tire companies experience a wax blooming problem due to the need for high levels of wax in the tire sidewalls to protect against static ozone cracking during storage. Current sidewall compounds contain Alkyl aryl p-phenylene diamines such as 6PPD or IPPD for dynamic ozone protection, but these do not provide adequate static ozone protection. Therefore a combination of 6PPD or IPPD with blended waxes have been used for many years in sidewall compounds In this paper the use of no wax or low levels of wax in combination with Dialkyl p-phenylene diamines (77PD) or 2,4,6,-Tris-(N-1,4-dimethylpentyl-p-phenylenediamino)-1,3, 5-triazine (TAPDT) for long term dynamic ozone protection is described