HYDRAULIC COMPOSITION

To provide a hydraulic composition for laminate modeling having good extrudability from a nozzle and good self-supporting property after lamination.SOLUTION: There is provided a hydraulic composition which comprises (A) a water-soluble hydroxyalkyl alkyl cellulose, which is hydroxypropyl methyl cell...

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Bibliographic Details
Main Author KONISHI HIDEKAZU
Format Patent
LanguageEnglish
Japanese
Published 19.10.2023
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Summary:To provide a hydraulic composition for laminate modeling having good extrudability from a nozzle and good self-supporting property after lamination.SOLUTION: There is provided a hydraulic composition which comprises (A) a water-soluble hydroxyalkyl alkyl cellulose, which is hydroxypropyl methyl cellulose and/or hydroxyethyl methyl cellulose, (B) a defoaming agent, (C) cement, (D) water, (E) a polyvinyl alcohol and (F) borax, wherein the degree of substitution (DS) of alkoxy groups in the water-soluble hydroxyalkyl alkyl cellulose of the component (A) is 1.6 to 2.0, the 2 mass% aqueous solution viscosity of the water-soluble hydroxyalkyl alkyl cellulose at 20°C is 50 to 1000 mPa s, the saponification degree of the polyvinyl alcohol of the component (E) is 70 to 90 mol%, the 4 mass% aqueous solution viscosity of the polyvinyl alcohol at 20°C is 20 to 80 mPa s and the amount added of the water of the component (D) is 25 to 70 pts.mass based on 100 pts,mass of the cement.SELECTED DRAWING: None 【課題】ノズルからの押出性が良好で、かつ積層後の自立性も良好な積層造形用の水硬性組成物を提供する。【解決手段】(A)ヒドロキシプロピルメチルセルロース及び/又はヒドロキシエチルメチルセルロースである水溶性ヒドロキシアルキルアルキルセルロース、(B)消泡剤、(C)セメント、(D)水、(E)ポリビニルアルコール及び(F)ホウ砂を含み、(A)成分の水溶性ヒドロキシアルキルアルキルセルロースのアルコキシ基の置換度(DS)が1.6~2.0であり、かつ該水溶性ヒドロキシアルキルアルキルセルロースの20℃における2質量%の水溶液粘度が50~1000mPa・sであり、(E)成分のポリビニルアルコールのケン化度が70~90モル%であり、かつ該ポリビニルアルコールの20℃における4質量%の水溶液粘度が20~80mPa・sであり、(D)成分の水の添加量がセメント100質量部に対して25~70質量部である。【選択図】なし
Bibliography:Application Number: JP20220063336