摘要:
The present invention relates to (1) a process for producing a hydroxyalkyl cellulose having an excellent water-solubility while maintaining a high reaction selectivity by adding a basic compound and an alkyleneoxide to a cellulose to conduct a reaction therebetween in which the basic compound is added in a total amount of from 0.3 to 1.5 mol per 1 mol of an anhydroglucose unit in the cellulose, and the alkyleneoxide is added in a total amount of from 1.0 to 3.0 mol per 1 mol of an anhydroglucose unit in the cellulose, the process including a step of adding the basic compound in an amount of from 50 to 95% of the total amount of the basic compound to be added during the process, and then adding the alkyleneoxide in an amount of from 30 to 80% of the total amount of the alkyleneoxide to be added during the process to react the compounds with the cellulose, thereby obtaining a reaction mixture; and a step of adding a remaining amount of the basic compound and a remaining amount of the alkyleneoxide to the reaction mixture obtained in the previous step to conduct a reaction therebetween; (2) a hydroxyalkyl cellulose produced by the process; and (3) a process for producing a cationized hydroxyalkyl cellulose using the resulting hydroxyalkyl cellulose.
摘要:
According to the present invention, particle diameter of a raw material to be pulverized can be made small within a short period of time. Provided by the invention is a vibration mill which is provided with: a container (1) having therein a columnar space with a central axis of the columnar space being disposed so as to be almost horizontal while the container being held so as to be vibratable in a direction of within a plane that is almost perpendicular to the central axis, a cylindrical medium (2) disposed in the container (1) so as to be vibratable, and a plurality of pulverizing media (3a, 3b) disposed inside the cylindrical medium (2) so as to be vibratable. The ratio of an inner diameter of the cylindrical medium (2) in contacted with the pulverizing medium (3 a, 3b) to an outer diameter of the pulverizing medium (3 a, 3b) (inner diameter of the cylindrical medium (2) in contacted with the pulverizing medium (3a, 3b)/outer diameter of the pulverizing medium (3a, 3b)) is 2.1 or more, and the integrated value of volumes of the pulverizing media (3 a, 3b) relative to a space volume inside the cylindrical medium (2) in contacted with the pulverizing medium (3a, 3b) is more than 25%.
摘要:
The present invention relates to (1) a process for producing a hydroxyalkyl cellulose having an excellent water-solubility while maintaining a high reaction selectivity by adding a basic compound and an alkyleneoxide to a cellulose to conduct a reaction therebetween in which the basic compound is added in a total amount of from 0.3 to 1.5 mol per 1 mol of an anhydroglucose unit in the cellulose, and the alkyleneoxide is added in a total amount of from 1.0 to 3.0 mol per 1 mol of an anhydroglucose unit in the cellulose, the process including a step of adding the basic compound in an amount of from 50 to 95% of the total amount of the basic compound to be added during the process, and then adding the alkyleneoxide in an amount of from 30 to 80% of the total amount of the alkyleneoxide to be added during the process to react the compounds with the cellulose, thereby obtaining a reaction mixture; and a step of adding a remaining amount of the basic compound and a remaining amount of the alkyleneoxide to the reaction mixture obtained in the previous step to conduct a reaction therebetween; (2) a hydroxyalkyl cellulose produced by the process; and (3) a process for producing a cationized hydroxyalkyl cellulose using the resulting hydroxyalkyl cellulose.
摘要:
The present invention relates to an asphalt composition enabling one to provide an asphalt pavement in which the occurrence of rutting and fatigue cracking is inhibited and a method for producing the same, and to an additive for asphalt. The asphalt composition contains asphalt and cellulose, wherein the content of the cellulose is 0.01 part by mass or more and 10 parts by mass or less based on 100 parts by mass of the asphalt, and a crystallization index of the cellulose is 50% or less.