Effect of the Amount of Calcium Carbonate as Filler on the Rheological and Adhesion Properties of a Water-Based Polyurethane Dispersion

2005 ◽  
Vol 221 (1) ◽  
pp. 33-42 ◽  
Author(s):  
Ana Belén Muñoz-Milán ◽  
Ma Ángeles Pérez-Limiñana ◽  
Francisca Arán-Aís ◽  
Ana Torró-Palau ◽  
A. César Orgilés-Barceló
Keyword(s):  
Calcium Carbonate ◽  
Adhesion Properties ◽  
Polyurethane Dispersion ◽  
Water Based

Study on Polyurethane-Acrylic Hybrid Emulsion Applying to Water-Based Ink

2012 ◽  
Vol 182-183 ◽  
pp. 3-7 ◽  
Author(s):  
Jing Lei Tai ◽  
Guang Xue Chen ◽  
Qi Feng Chen ◽  
Bao Ling Tang
Keyword(s):  
Particle Size ◽  
Ir Spectra ◽  
Water Resistance ◽  
Alkyd Resins ◽  
Polyurethane Dispersion ◽  
Water Based ◽  
Color Density

Polyurethane-acrylic composite emulsion was synthesized by swelling polymerization with aqueous polyurethane dispersion as seed, and acrylic as monomers. The obtained polyurethane-acrylic (PUA) composite emulsion were characterized by means of IR spectra, and the results showed that the obtained emulsion was hybrid emulsion of polyurethane and acrylic, which had smaller particle size and higher viscosity and was more suitable for the preparation of ink. The obtained water-based PUA emulsion and alkyd resins were used as ink binder. The obtained water-based ink had good water resistance, color density, gloss and friction fastness.

Environmental Friendly Surface Treatment of SBS Rubber with Acidified Chloramine T Aqueous Solutions

2007 ◽  
Vol 80 (1) ◽  
pp. 139-158 ◽  
Author(s):  
M. Virtudes Navarro-Bañón ◽  
M. Mercedes Pastor-Blas ◽  
José Miguel Martín-Martínez
Keyword(s):  
Aqueous Solutions ◽  
Surface Treatment ◽  
Hypochlorous Acid ◽  
Surface Modifications ◽  
Adhesion Properties ◽  
Near Surface ◽  
Environmental Friendly ◽  
Water Based ◽  
Rubber Surface ◽  
Chloramine T

Abstract As environmental friendly alternative to the halogenation treatment with trichloro isocyanuric acid solutions in organic solvents (TCI/MEK), in this study a water-based surface treatment for rubber materials based in chloramine T aqueous solutions has been proposed. It was found that the effectiveness of chloramine T (CT) (N-chloro-sodium-p-toluenesulphenamide) as chlorinating agent for rubber depends on the pH of the chlorinating solution. The surface modifications and adhesion in one SBS rubber treated with aqueous solutions of CT has been studied. Acidification of CT aqueous solutions produced the formation of dichloramine T (DCT) and hypochlorous acid (HClO), species which reacted with C = C bonds of the butadiene units. A decrease in the pH of the CT aqueous solutions produced more extended surface modifications and improved adhesion properties in the joints produced with chlorinated SBS rubber and waterborne polyurethane adhesive. T-peel strength values obtained were slightly lower than those obtained for the SBS rubber surface treated with the organic solvent chlorinating system (TCI/MEK). The solvent effect leading to local swelling and therefore to deeper modifications in the rubber near surface properties was not present with water based solutions, and then, the modifications were much more superficial. On the other hand, acidification with hydrochloric acid produces deposition of NaCl crystals on the SBS rubber surface. Thus, acidification of the chloramines T solution with sulfuric acid was preferable.

scholarly journals New water-based flexographic ink based on new ter-polymer nano-particles as eco-friendly binders – Part II

2020 ◽  
Vol 49 (6) ◽  
pp. 473-482
Author(s):  
H. Abd El-Wahab ◽  
G.A. Meligi ◽  
M.G. Hassaan ◽  
L. Lin
Keyword(s):  
Water Resistance ◽  
Low Cost ◽  
Thermo Gravimetric Analysis ◽  
Gel Permeation Chromatography ◽  
Nano Particles ◽  
Gravimetric Analysis ◽  
Adhesion Properties ◽  
Content Type ◽  
Low Viscosity ◽  
Water Based

Purpose The purpose of this study is to prepare, characterise and evaluate nano-emulsions of ter-polymers of various compositions as eco-friendly binders for flexographic ink industry. Design/methodology/approach Various nano-emulsions of ter-polymers were prepared based on Vinyl acetate, Vinyl Versatate, butyl acrylate, acrylic acid and acrylamide monomers by means of a conventional seeded emulsion polymerisation technique, using K2S2O8 as the initiator. The characterisation of the prepared emulsions was performed using Fourier transform infrared, thermo-gravimetric analysis, gel permeation chromatography and transmission electron microscopy. A selection of co-polymers and ter-polymers were formulated with pigments and additional ingredients, as water-based flexographic inks. The inks were characterised for their rheological properties, pH, degree of dispersion, water-resistance and colour density. Findings It was found that the low viscosity of the prepared polymers may reduce the film thickness of the flexographic inks and may also increase the spreading of the ink on the surface. As a result, stable modified poly acrylate-based latex with improved physico-mechanical properties was obtained. The prepared latexes showed improved properties such as enhanced thermal stability and better water resistance. The effect of the emulsifier type on the properties of the resulting emulsion latexes and their corresponding films were investigated. Also, as the hydrophobic monomer increases, so does the colour density and increasing the binder ratio enhances the gloss values. The improving in gloss values were obtained and provide excellent adhesion properties for both the pigment particles and the base paper. Research limitations/implications The study focusses on the preparation of new water-based ter-polymer nano-particles and their use as eco-friendly binders for flexographic ink industry. Ink formulations based on other different type emulsion polymers could also be studied to assess the applicability of the ink formulation system found for other binders. Practical implications The ink formulations developed could find use in industrial-scale printing. Originality/value Eco-friendly environment and low-cost ink formulations for printing on paper substrates are novel.

Performance of environmental friendly water-based calcium carbonate nanofluid as enhanced recovery agent for sandstone oil reservoirs

2021 ◽  
Vol 196 ◽  
pp. 107644 ◽  
Author(s):  
Mohammadamin Rashidi ◽  
Azim Kalantariasl ◽  
Rahmatallah Saboori ◽  
Abdolhossein Haghani ◽  
Alireza Keshavarz
Keyword(s):  
Calcium Carbonate ◽  
Enhanced Recovery ◽  
Oil Reservoirs ◽  
Environmental Friendly ◽  
Water Based

scholarly journals Assessment of Influence and Threshold Ratios of Titanium Dioxide and Calcium Carbonate as Pigments on the Physico-Mechanical Properties of Emulsion Paint

2019 ◽  
Vol 3 (Issue 1) ◽  
Author(s):  
A.A Raheem ◽  
O.A Olowu ◽  
A.E. Aladeloba ◽  
A.A Hungbo ◽  
A.Y Akinsanya
Keyword(s):  
Mechanical Properties ◽  
Titanium Dioxide ◽  
Calcium Carbonate ◽  
Specific Gravity ◽  
Low Cost ◽  
Skin Irritation ◽  
Drying Time ◽  
Adhesion Properties ◽  
Emulsion Paint ◽  
Surface Drying

Titanium dioxide (TiO2) also known as Titanium White, is an inorganic, synthetic pigment used in paint to protect the substrate from harmful effects of ultraviolet light when lead pigments are regarded as toxic. However, its use is being limited since it causes flu-like symptoms, respiratory problem and skin irritation. Calcium carbonate (CaCO3) is a chemical commonly used as an extender pigment in cement to provide bulkiness at relatively low cost. Because of the problem associated with TiO2, it is of importance to regulate and optimize the use of TiO2 relative to CaCO3 and their influence on the physico-mechanical properties of emulsion paints. Nine paint specimens were formulated using 0 – 80 grams per litre of TiO2 and 120 – 200 grams of CaCO3, respectively at 10 gram interval. The following tests were performed on them: specific gravity, viscosity, pH, surface drying time, hard drying time, wash-ability/adhesion and opacity tests, in accordance to Nigerian Industrial Standard (NIS) 278: 1990. The result shows that all samples met specifications of 10 poise maximum, 5%, 7.5-9.0, 20 minutes, 2 hours, and 201 minimum, for viscosity, specific gravity, pH, surface drying time, hard drying time and wash-ability/adhesion properties, respectively. However, six sample specimens only met the requirement of NIS 278:1990 of 2coats for good opacity. In conclusion, TiO2 has no negative effect on the other physio-mechanical properties except the opacity of the paint and so specimens 7, 8 and 9, and ratio 30:170 is considered the threshold values for the paint production.

scholarly journals REPLACEMENT OF Ti02 PIGMENT BY CaC03 FROM CEFALONIA IN EMULSION PAINTS

2007 ◽  
Vol 40 (2) ◽  
pp. 759
Author(s):  
K. Kalafati ◽  
G. E. Christidis
Keyword(s):  
Mechanical Properties ◽  
Calcium Carbonate ◽  
Great Part ◽  
Raw Material ◽  
Carbonate Content ◽  
White Pigment ◽  
High Calcium ◽  
Water Based ◽  
Tio2 Pigment ◽  
Optical And Mechanical Properties

The purpose of this work is to show that calcium carbonate from the chalky limestone deposits of Minies in Kefalonia, exploited by IONIAN KALK S.A., is a suitable raw material for paint industry and especially in emulsion (water based) paints. The deposit is characterized by a high calcium carbonate content (>99 %), high whiteness and low yellowness, by negligible content of heavy metals and low contents of MgO (<0.15 %), Si02 (<0.05 %) andFe203 (<0.01 %). This research was based on determination of the optical and mechanical properties of the emulsion white water based paints, which included calcium carbonate from the Kefalonia limestone deposits. The calcium carbonate replaced Ti02 pigment in various proportions. It is concluded that this product can be utilized not only as inert filler and extender but may have more functional application acting simultaneously as pigment. Replacement of TiO2 pigment by calcium carbonate may reach 50% without deteriorating the optical and mechanical properties significantly. Hence calcium carbonate from this deposit offers excellent optical properties to paints, reduces sufficiently their production cost and replaces a great part of the proportion of titanium dioxide, which is currently used as white pigment.

scholarly journals Influence of Common Weighing Agents on Rheological Behaviour of Drilling Mud

2019 ◽  
Vol 8 (4) ◽  
pp. 9720-9722
Keyword(s):  
Calcium Carbonate ◽  
Xanthan Gum ◽  
Drilling Fluid ◽  
Rheological Behaviour ◽  
Plastic Viscosity ◽  
Rheological Characteristics ◽  
Drilling Mud ◽  
Ambient Conditions ◽  
Drilling Operation ◽  
Water Based

Drilling fluid or mud is essential fluid in drilling operation which has many important properties and one of the important properties is the viscosity of the drilling fluid and the viscosity is further classified as yield viscosity and plastic viscosity which means different in terms of its function. This paper is attempting to show the rheological characteristics of the different samples of the drilling fluid using Xanthan Gum and Physillum husk and different weighting agents Barite and Calcium Carbonate at ambient conditions. The results showed that xanthan gum acts as good viscosifying agent as compared with physillum husk. In addition that, the water based drilling mud with barite which act as weighing agent proved better as compared with calcium carbonate. The following paper will be valuable to the graduates, future graduates and also to the Industry personnel have a basic idea about the rheology and how the parameters related to the rheology are valuable in mud design.

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