Wyniki wyszukiwania - BazTech

1

A biopolymer matting agent for coatings

Hajas J., Krijns R., Lenz P., Bodi M., Hans M.

Farby i Lakiery

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2014

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nr 1

3--9

EN

A high molecular weight natural polyester type biopolymer, based on renewable resources and produced in a fermentation process, can be used in various types of coatings for gloss reduction. Matting results in aqueous, solvent-borne and 100 % solids radiation curing coating wood and industrial coating formulations will be highlighted in comparison to silica and wax based matting additives. The new technology of matting provides effective gloss reduction in many systems, without significantly increasing the viscosity, and not negatively impacting leveling, transparency and air release characteristics. Additional positive side effects are the improvement of the scratch and abrasion resistance and soft-touch properties of the coating film, together with a pronounced anti-slip effect. The new matting agent is also completely biodegradable.

2

A novel biopolymer based coating additive. Performance the natural way

Lenz P., Hans M., Luttikhedde H.

Farby i Lakiery

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2013

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nr 5

3--7

EN

A novel micronized additive based on a renewable raw material provides excellent matting properties. Further beneficial effects, such as a pleasant surface touch and good mechanical properties are observed. The best results were achieved in UV systems, but the additive is suitable for solvent-free, solvent-borne and water-borne coatings.

3

Large Magellanic Cloud Cepheids in the ASAS Data

Karczmarek P., Dziembowski W. A., Lenz P., Pietrukowicz P., Pojmański G.

Acta Astronomica

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2011

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Vol. 61, No. 4

303--318

EN

A catalog of Cepheids in the Large Magellanic Cloud (LMC) from the ASAS project is presented. It contains data on 65 fundamental mode pulsators with periods longer than about 8 days. The period-luminosity (PL) relation in the V-band does not significantly differ from the relation determined from the OGLE-III data extended toward longer periods but shows much larger scatter. For objects with periods longer than 40 d there is an evidence for a shallower PL relation. The rates of long-term period variations significant at 3σ level are found only for seven objects. The rates for 25 objects determined with the 1σ significance are confronted with the values derived from stellar evolution models. The models from various sources yield discrepant predictions. Over the whole data range, a good agreement with measurements is found for certain models but not from the same source.