Download or read book Oil Absorption of Pigments written by Charles W. Glancy and published by . This book was released on 2012 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: MIXING A PIGMENT WITH LINSEED OIL AND MAK-ing a paste is a preliminary test applied to pigments that has been in use in a systematic manner for almost a century and perhaps even longer in a less defined manner. This proved to be a practical means to qualitatively characterize the approximate color and texture of pigments quickly with materials and tools readily at hand. The work of mixing and the flow properties of the resulting paste provided an estimate of the rheological impact of a new pigment under consideration or a proposed pigment composition change. Thus, valuable insight of the dispersion performance of a pigment or formulation change in a mill base could be estimated. Further extension of the test was found to be useful in predicting the consistency of finished products. Mills [3] indicated that if equal volumes of oil absorption paste are mixed or thinned with equal volumes of thinners, the paints prepared have equal resistance to flow, viscosity, or consistency. While the application of oil absorption values as a formulation tool originated many years ago in the age of oil- and alkyd binder-based paints, the ability to use this information to calculate the binding power index of latex binders, latex porosity index of latex paints, and free binder continues to demonstrate the value of pigment oil absorption data today to solve coatings formulation problems. This is especially true for the field of interior and exterior architectural paints. If the oil absorption test is conducted in a quantitative manner, the result is a measure of the oil needed to wet the surface area of the pigment and to fill the voids in and among the pigment particles. If this result is achieved, profoundly important information is obtained of high value to pigmented paint and coatings development. A number of relatively simple test procedures have been developed to measure oil absorption of pigments. The difficulty generally to successfully applying these tests has been in two areas. First, great care and effort is required to reach and interpret the oil absorption end point. Secondly, one must obtain particle separation in the test to the same degree as achieved with the formulation in the pigment dispersion manufacturing process to which oil absorption value is to be related. Two ASTM pigment oil absorption test methods are available, which cover two incorporation methods. The different methods result in different end points and therefore different oil absorption values. Stieg [4] found that if the oil absorption value is determined by the ASTM D281 (Test Method for Oil Absorption of Pigments by Spatula Rub-Out) and expressed on a volume basis, it is proportional to the critical pigment volume concentration (CPVC) of alkyd wall paints. Later he and others demonstrated the extension of oil absorption values to calculate the CPVC of pigment compositions to predict the performance of latex paints and other calculated factors useful in formulating these coatings. Gardner-Coleman oil absorption, ASTM D1483 (Test Method for Oil Absorption of Pigments by Gardner-Coleman Method), values have been related to pigment paste viscosities and found useful in estimating consistencies by comparison to a reference standard pigment behavior in the same dispersion machinery. A number of non-ASTM methods for the determination of oil absorption values have been reported in the literature and a few will be listed below.

Download or read book Chapter 28 Oil Absorption of Pigments written by JV. Koleske and published by . This book was released on 1995 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: MIXING A PIGMENT WITH LINSEED OIL and making a paste is a preliminary test applied to pigments that has been in use in a systematic manner for almost a century and perhaps even longer in a less defined manner. Results from the test are usually qualitative in character and give an approximation of color and texture. If the test is conducted in a quantitative manner, the amount of oil needed to make a stiff paste is obtained. It has been felt that the oil absorption test is a measure of an oil-based paint's resistance toflow or consistency. For example, Mills [2] indicated that if equal volumes of oil absorption paste are mixed or thinned with equal volumes of thinners, the paints prepared have equal resistance toflow, viscosity, or consistency. Also, Stieg [3] found that if the oil absorption value is determined by the ASTM rub-out method (described below) and expressed on a volume basis, it is proportional to the critical pigment volume concentration. This test is also related to the pigment packing factor (PPF) and critical pigment volume concentration (CPVC).

Download or read book Oil Absorption of Pigments written by GG. Sward and published by . This book was released on 1972 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: A common preliminary test applied to a pigment is mixing it into a paste with linseed oil. The test gives a rough idea of color and texture and, if done quantitatively, tells how much oil is needed to make a stiff paste. According to some authorities the oil absorption (OA) test predicts consistency of ready-mixed paint. Mills [1] writes "When equal volumes of paste (oil absorption paste) are thinned with equal volumes of thinners, the resulting paints have equal consistencies." Stieg [2] shows that OA by the rubout method, expressed on a volume basis, is proportional to critical pigment volume, judged by uniformity of flat alkyd paints made with varying percentages of pigment, or determined by the Asbeck-Van Loo method.

Download or read book Paint Testing Manual written by Sward and published by ASTM International. This book was released on 1972 with total page 618 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Standard Method of Test for Oil Absorption of Pigments by Spatula Rub out written by American Society for Testing Materials and published by . This book was released on 196? with total page 205 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Standard Test Method for Oil Absorption of Pigments by Gardner Coleman Method written by and published by . This book was released on with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Testing Pigments written by and published by . This book was released on 1965 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Testing Pigments written by and published by . This book was released on 1992 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book General Methods of Test for Pigments and Extenders Determination of Oil Absorption Value written by B. S. 3483:part B 7:1982 and published by . This book was released on 1982-11-30 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pigments, Paints, Paint extenders, Extenders, Absorption, Linseed oil, Physical testing, Test equipment, Dimensions, Samples, Testing conditions

Download or read book Oils Pigments Paints Varnishes Etc written by Rupert Harry Truelove and published by . This book was released on 1922 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Paint and Coating Testing Manual written by and published by ASTM International. This book was released on with total page 921 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Pigments written by John Stewart Remington and published by . This book was released on 1954 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Paint Flow and Pigment Dispersion written by Temple C. Patton and published by . This book was released on 1964 with total page 504 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presents researchers and engineers in the fields of coating (paints) and inks with a practical and comprehensive overview of rheological and related aspects of these two industries. Covers: viscosity and viscosity measurement, pigment/binder geometry and their application, critical pigment volume concentrations, surface tension phenomena, pigment dispersions and pigment disperants, solubility and interaction parameters, evaporation and volatility interaction, coating rheology, dispersion equipment, film applicators, mill base formulation and letdown, application rheology.

Download or read book European Coatings Handbook written by Thomas Brock and published by Vincentz Network GmbH & Co KG. This book was released on 2000 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Chemistry of Paints Pigments Varnishes written by Joseph Gauld Bearn and published by . This book was released on 1925 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Methods of Testing Pigments for Paints BS 3483 written by British Standards Institution and published by . This book was released on 1982 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Traditional Oil Painting written by Virgil Elliott and published by Watson-Guptill. This book was released on 2007 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Traditional Oil Painting is that rare sourcebook that comprehensively covers the most advanced techniques and concepts of oil painting"--P. [2] of cover.