OBS - Stabilizers - Baerlocher GmbH

Kunststoffe international, 2005-11-21, Additives
... pigments of the Variocrom series (manufacturer: BASF, Ludwigshafen/Germany) provide a special effect. The colour shade undergoes a change – such as from green to red (grade: Magic Green K 9811) – depending on the angle from which it is observed. This is achieved through the interplay of light interference and refraction on iron oxide and silicon dioxide layers that are applied to micaceous iron oxide plaques (MIOX), as shown in Fig. 6. Conventional Cu phthalocyanine blue pigments have a negativ...

Kunststoffe international, 2005-11-21, Metering Technology: Precision for Highly Filled Formulations
...filler content, other additives such as colourants and processing aids affect the processing characteristics. In conventional pipe formulations, lead-zinc or calcium-zinc stabilisers are employed. Over the past five years, organic-based stabilisers (OBS) have been introduced in an attempt to employ heavy metal-free formulations. Unfortunately, however, the price of these ecologically acceptable stabilisers is considerably higher, which has presented an obstacle to their general use to date. Com...

Kunststoffe international, 2005-11-21, Performance Show and Interview: Round About Pipe
...on of the following: - Alu-PEX composite pipe with a diameter of 16mm and TIG welding, - PEX pipe produced via the Monosil process with EVOH as oxygen barrier layer, - corrugated PP sewer pipe in the size 400sn8, - highly filled PVC sewer pipe with OBS stabilisation in the size 315sn8, - PE 100 pressure pipe 160pn6 with a PP protective jacket. A new system with the name IntelliChange was premiered for changing size quickly and economically. The system is very simple to operate and permits use...

Kunststoffe international, 2006-08-06, Stabilisers (Part 1): Alternative Stabiliser Systems for PVC
...are enjoying increasing popularity, since barium and cadmium-containing systems, in particular, have greatly declined in importance for toxicological reasons. - Organic-based stabilisers: metal-free primary stabilisers (organic-based stabilisers or OBS [registered trademark of the Chemtura company]) have been experiencing a renaissance for some years now for environmental reasons. Compounds such as 1,3-dimethyl-4-aminouracil (DMAU), aminocrotonates such as BGAC and TGAC, and urea and thiourea d...

Kunststoffe international, 2006-09-08, Stabilisers (Part 2): PVC and the Environment
...igher the content of lead stabiliser is, the greater the lead concentration in the extract. In all cases, however, the value of 0.3mg/m2d was not exceeded after the second extraction. - If lead is combined with Ca/Zn, higher migration of lead can be observed than with pure lead stabilisers. This is probably due to increased water absorption by the Ca/Zn stabiliser. - Migration of zinc is less than 0.15mg/m2d in all cases. - The combination of lead and Ca/Zn stabilisers also slightly increases z...

Kunststoffe international, 2007-09-19, Tailored to Your Timeline
...time, new, environmentally sound additives are being developed to offset this criticism and an even better future may be in store for this resin. In the area of colorants, trends to transparent colors in polyolefins and functional effects can be observed, e.g. thermochromism, photochromism and luminescence. From Additives to Service for REACH The Korean company Songwon is now active under its own name in the polymer industry and is present in Europe as Songwon International AG in Frauenfeld, S...

Kunststoffe international, 2008-05-10, Chalk as a Filler – Effect on Weathering Behavior
...C in flower pollen – or as a result of weathering? To answer this question, we launched a comprehensive project to study the entire range of historically and currently used stabilizers – lead, lead-barium-cadmium, butyl tin, calcium-zinc, OBS (trade name of Chemtura) and a virtually metal-free laboratory system. These systems were combined with different fillers, chalks of different quality (Table 1) and model substances. The model substances studied were magnesium carbonate, zinc carbonate, lea...