PURPOSE: To provide an encapsulant ready to encapsulate, exhibiting a high gelling speed, suitable for observation and administration of an encapsulated material and capable of readily taking out the encapsulated material again.
CONSTITUTION: An encapsulant composed of a composition containing an amine compound of formula I [R1 to R3 are each H or a hydrocarbon group; R4 is H, a hydrocarbon group or O; The hydrocarbon group is 1 to 28C and the total number of C contained in R1 to R4 is 4 to 50; X- is an inorganic or organic acid residue; (n) is 0 in the case of R4=O- and 1 in other cases] and water, performing a reversible phase transition from a transparent liquid to a get state when the temperature is changed and capable of performing a phase transition from a liquid of ≤200cP viscosity to a solid gel within a range of 3min by a change in temperature within a range of 3°C from the phase transition temperature. As the compound of formula I, a quaternary ammonium salt of formula II (R1 to R4 are each an alkyl, an alkylene or an alkanol), an alkylamine of formula III (Y--R4 is sulfonic acid ion, sulfonate ion, phosphonate ion, nitrate ion, etc.) or an amine oxide of formula IV is preferably used.
SUZUKI SHIGEO
NAGASE RENPEI
SUZUKI SHO
