As a part of the current studies to improve characteristics of inorganic composite materials by the interaction between inorganic and organic substances, the previous paper reported the formation mechanism and the characteristics on the hydrate of Ca (OH)
2-CH
3OH system which formed by immersing CaO and Ca (OH)
2 in CH
3OH.
In this paper, the interaction between Ca (OH)
2 and C
2H
5OH by autoclaving or immersing in C
2H
5OH were studied, using CaO and Ca (OH)
2 as starting materials. The characteristics of the hydrate of Ca (OH)
2-C
2H
5OH system such as particle size, surface property and thermal stability for inorganic filler were mainly explained.
By immersing or autoclaving CaO and Ca (OH)
2 in C
2H
5OH, C
2H
5O group in C
2H
5OH invasioned easily in OH layer of layer structured Ca (OH)
2 of CdI
2 type and then the ethoxidation (Ca-OC
2H
5 bond) progressed. However the degree of the ethoxidation promoted remarkably by autoclaving rather than the immersion. In the case of CaO, the hydrate containing 20% as C
2H
5O group of Ca (OH)
2-C
2H
5OH system which formed by autoclaving at 10 kg/cm
2 for a period of five hours, produced as thin hexagonal plate-like shape with ultrafine particle size of 0.02-0.06μm (specific surface area being 165m
2/g). The hydrate dispersed in several organic solvents and its surface was changed into lipophilic. The hydrate had excellent characteristics of inorganic filler for plastic, rubber and paper in comparison with that of Ca (OH) 2-CH
3OH system described in previous work.
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