Fast drying coatings
An ink binder and composition technology, applied in coatings, inks, household appliances, etc., to increase the speed of pigment dispersion, enhance drying acceleration, and reduce VOC emissions.
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Embodiment 1
[0041] Process for preparing poly(hydroxy)aliphatic acid-fatty acid solutions
[0042] A nitrogen-covered pyrex glass-lined vessel equipped with an external heating-cooling jacket, a high-speed disperser, and suitable inlets and outlets was added to the vessel with 150 kg of rapeseed fatty acid and 75 g of 1,2,3-trimethyl Oxybenzene. The mass was heated and maintained at 140°C under nitrogen for 3.5 hrs, during which time 50 kg of poly(6) caprolactone (Mw 2700, Mn 1290) (Dow Chemical Corp. Tone polymer) was gradually added and dissolved. The resulting tan solution was cooled to room temperature under high shear and then discharged. The yield (25 wt %) of a free-flowing liquid solution of low viscosity poly-6-hydroxycaproic acid was named 1A.
[0043] Prepared similarly in approximately quantitative yields were 32% polylactic acid (Dow material) in oticca oleic acid (1B), and 11% polyglycolic acid (Dupont) in tung oil fatty acid (1C).
Embodiment 2
[0045] Process for preparing poly(hydroxy)aliphatic acid-fatty acid solutions
[0046] The Pyrex glass of nitrogen cover is made liner vessel and is equipped with external heating-cooling jacket, high speed disperser, distillation column, distillation receiver, and suitable inlet and outlet, add 150kg soybean oil fatty acid, 325g antimony pentoxide, and 75 g of 1,2,3-trimethoxybenzene. The batch was heated and maintained at 160°C under nitrogen for 3.5 hrs, during which time 30 kg of 4-butyrolactone, and 15 kg each of 2-hydroxypropionic acid and 4-hydroxy 2-pentenoic acid were premixed and added continuously. After the addition was complete (continuous distillation of red water was observed), the reaction temperature was raised to 200°C where it was maintained under 25 mm Hg vacuum for two hours. After cooling to 70° C., the product was recovered as a light brown medium viscosity solution before discharge. The resulting tan solution was cooled to room temperature under high ...
Embodiment 3
[0054] A method of preparing a fast-drying lithographic ink vehicle showing the advantages of the method over conventional techniques; namely, enhanced gloss, rub resistance, and cure and drying speed
[0055] A 200 gallon water jacketed 316ss mixing tank with a 10 hp low speed agitator heated, mixed and maintained at 50-65°C during which time 1A, 80 lb.; Ultrex100, 240 lb., Ultrex 110 were added sequentially 562 lbs. [Ultrex (aluminum gelled soy alkyd) resin supplied by Lawter Div. Of Eastman Chemical Co.]; BA 18 lbs, and aluminum stearate 4.5 lbs. The resulting solution (3A) was evaluated as a gloss varnish in terms of availability. A portion of this varnish was converted into a lithographic ink by dispersing therein 16 wt% of a phthalocyanine blue pigment (Ciba Irgalite blue LGE). Inks and varnishes were evaluated against a control formulation in which 1A and BA were replaced with similar proportions of 300°F Magie 300 ink oil (Mobil Oil) and 6% cobalt naphthenate, respect...
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