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Influence of hydrophobically modified HEC on the viscosity of latex paints

Cellulose ethers are an inseparable element of dispersion paints, especially with medium-high and high PVC where the proportion of polymer dispersion is not too high. They are one of the most commonly used wall and ceiling dispersion paint thickeners on the EMEA and Asia-Pacific markets. One of the basic and very common cellulose thickeners isContinue reading “Influence of hydrophobically modified HEC on the viscosity of latex paints”

The flash point of coalescing agents for water-borne paints

Flash point is a parameter that is usually associated first with solvents and solvent-based paints. Flammability pictograms are usually found on such products. It should also not be forgotten that the coalescents present in many water-borne paints are also organic compounds showing vapor pressure, which under appropriate conditions show a flash point. These tests areContinue reading “The flash point of coalescing agents for water-borne paints”

The range of laboratory tests used to evaluate stain resistant latex paints

Wall paints in terms of stain resistance are experiencing their extraordinary growth. However, not all companies have properly prepared formulations yet, because the preparation of paints that will be resistant to everyday stains and enable their easy removal is extremely difficult and requires extensive knowledge in the field of raw materials and tests to verifyContinue reading “The range of laboratory tests used to evaluate stain resistant latex paints”

Determination of pot-life of 2K WB epoxy paints according to ISO 9514

Two-component paints (or multiple-component paints) require the addition of a cross-linking agent prior to application. However, it is very important to know about the time the paint should be used up after mixing with the hardener or other recommended crosslinking ingredient. Often, in two-component paints, the determinant is an increase in viscosity that prevents furtherContinue reading “Determination of pot-life of 2K WB epoxy paints according to ISO 9514”

Volume solids in paints. Why is it considered very important almost only on the NAFTA paint market?

Obtaining hiding power by appropriate preparation of the formulation with the use of volume solids is crucial today to meet market expectations in terms of coverage and compliance with the Eco-label criteria, which define the maximum amount of titanium dioxide pigment used in the coating. But why is attention not so much attached to thisContinue reading “Volume solids in paints. Why is it considered very important almost only on the NAFTA paint market?”

Paint spattering on laboratory tests by ASTM standards. Precise and repeatable

More and more people, not being professional painters, decide to change the color of their homes. Inspired by friendly low-VOC or zero-VOC latex paints, as well as popular Dulux paint ads, they paint a room in one afternoon without covering most furniture or floors with protective film, or not covering them at all. In orderContinue reading “Paint spattering on laboratory tests by ASTM standards. Precise and repeatable”

ASTM D4213 – when the 1st class of EN 13300 is not enough for quality of latex paint

IntroductionThe standard adopted since 2001 to classify the scrub resistance of wall paint coatings in Europe is EN 13300. It defines 5 classes depending on the thickness loss of coatings after 40 or 200 cycles, determined in accordance with ISO 11998. Thanks to this method, many paints on the European market can be well characterizedContinue reading “ASTM D4213 – when the 1st class of EN 13300 is not enough for quality of latex paint”

Why HMIS and NFPA 704 labeling are better than GHS?

In Europe, the labels of chemical substances, including paints and paint raw materials, contain GHS (Global Harmonized System) markings. This system was developed by the United Nations and is used throughout the European Union. In the SPEKTROCHEM paint laboratory located in Poland, however, we use slightly different systems for marking hazardous substances and associated hazards.Continue reading “Why HMIS and NFPA 704 labeling are better than GHS?”

Anti-Sag Index according to ASTM D4400. How to properly use this standard?

Paint runoff from vertical surfaces is an undesirable feature which, if present, causes not only unsightly drops or curtains. It is also heterogeneous thickness of the coating, which causes local less thickness, as well as local thickening, which, due to uneven drying and its thickness after drying, causes inhomogeneous strength of the coating. In orderContinue reading “Anti-Sag Index according to ASTM D4400. How to properly use this standard?”

Drying time tests and open-time tests of latex paints

Latex paints dry as a result of the coalescence process of polymer dispersion particles that bind all paint components to form a coating. This process occurs under certain conditions correctly, with appropriate selection of raw materials. To this end, raw materials such as dispersion binder and additives are selected appropriately – in order to reduceContinue reading “Drying time tests and open-time tests of latex paints”

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