A kind of lost foam water-based coating for cast iron and production method thereof
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A technology of water-based paint and lost foam, which is applied in the direction of coating, casting mold, casting mold composition, etc., can solve the problems of no overcoming, and achieve the effect of less flow marks, no sagging and accumulation, and high safety factor
Active Publication Date: 2015-07-29
共享新材料(山东)有限公司
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Description
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Problems solved by technology
[0003] So far there is no way to overcome the above drawbacks
Method used
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Embodiment 1
[0020] Embodiment 1: A lost foam water-based coating for cast iron, characterized in that: it includes the following raw materials in mass percentage: 22% of high alumina bauxite, 20% of pearl powder, 14% of brown corundum, and 2.3% of sodium bentonite , polyacrylamide 1.7%, polyvinyl acetate emulsion 3.2%, maltodextrin 1.1%, silica sol 5.1%, sodium hexametaphosphate 0.65%, tributyl phosphate 0.35%, sodium pentachlorophenate 0.25%, OP-10 activity Agent 0.35%, water 29%.
Embodiment 2
[0021] Embodiment 2: A kind of lost foam water-based coating for cast iron, it is characterized in that: it comprises the raw material of following mass percentage content: high alumina bauxite 19%, pearl powder 22%, brown corundum 15%, sodium bentonite 2.7% , polyacrylamide 1.8%, polyvinyl acetate emulsion 3.0%, maltodextrin 1.1%, silica sol 5.8%, sodium hexametaphosphate 0.4%, tributyl phosphate 0.45%, sodium pentachlorophenate 0.3%, OP-10 activity Agent 0.35%, water 28%.
Embodiment 3
[0022] Embodiment three: a kind of lost foam water-based paint for cast iron, it is characterized in that: it comprises the raw material of following mass percentage content: high alumina bauxite 24%, pearl powder 18%, brown corundum 15%, sodium bentonite 2.1% , polyacrylamide 2.0%, polyvinyl acetate emulsion 3.5%, maltodextrin 1.35%, silica sol 4.6%, sodium hexametaphosphate 0.85%, tributyl phosphate 0.3%, sodium pentachlorophenate 0.3%, OP-10 activity Agent 0.4%, water 27.6%.
[0023] The production method of above-mentioned a kind of lost foam water-based paint for cast iron comprises the steps:
[0024] a, bentonite pretreatment: under high-speed stirring, the sodium-based bentonite is mixed with water at a mass ratio of 1:4, completely dispersed evenly, and left to stand for 24 hours to obtain a pre-treated sodium-based bentonite slurry;
[0025] b. Pretreatment of polyacrylamide and maltodextrin: add sufficient amount of water to the mixing tank, and slowly add the poly...
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Abstract
The invention relates to a water-based paint of lost foam for iron casting. The water-based paint is characterized by comprising the following raw materials: high bauxite, precious peal powder, brown aluminum oxide, sodium bentonite, polyacrylamide, a polyvinyl acetate emulsion, maltodextrin, silica sol, sodium hexametaphosphate, tributyl phosphate, sodium pentachlorophenate, OP-10 active agent and water. A production method of the water-based paint comprises the steps: pretreating the sodium bentonite, pretreating the polyacrylamide and the maltodextrin, adding the water, the sodium pentachlorophenate, the tributyl phosphate and the sodium hexametaphosphate into a high-speed dispersion kettle, stirring and then sequentially adding the sodium bentonite slurry and a polyacrylamide and maltodextrin pretreatment solution into the dispersion kettle, sequentially adding the polyvinyl acetate emulsion and the silica sol into the dispersion kettle, sequentially adding the OP-10, the high bauxite, the precious pearl powder and the brown aluminum oxide to the dispersion kettle under a stirring state, and conducting high-speed dispersion for 30 minutes after completing the feeding. The water-based paint is unique in the raw materials, environment-friendly, high in coating strength, anti-cracking, good in permeability, and free from carbon lack of castings.
Description
technical field [0001] The invention relates to a production method of a water-based paint for lost foam casting, in particular to a water-based paint for lost foam casting for cast iron and a production method thereof. Background technique [0002] The lost foam casting technology was introduced into my country late. According to the characteristics of lost foam casting, about 30% of the casting quality is determined by the lost foam coating. Therefore, in the lost foam casting, the supporting lost foam coating is a key technology. However, due to historical reasons, the development of lost foam coatings in my country is relatively late. Compared with foreign coatings, its commercial production level is still very low, and the formulations are uneven. Low drying strength of coatings, high brittleness of coatings, poor air permeability of coatings, and Severe carbon defects on the surface of castings and other problems. In the lost foam coating, the coating strength and the ...
Claims
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Application Information
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