GELLING AGENT FOR COLD RESERVING MATERIAL, GEL AND GEL- LIKE COLD RESERVING MATERIAL

摘要

PROBLEM TO BE SOLVED: To prevent a protruding material formed at the time of freezing by providing a gel-like cold retaining material with shape retaining properties. SOLUTION: This aqueous gel is a transparent aqueous gel without fluidity prepared by reacting gelatin with a copolymer of an ethylenically unsaturated compound and an ammonium maleate. Furthermore, the solubility thereof at the time of preparation is good. The resultant aqueous gel can be utilized as a cold reserving material to thereby ensure good shape retaining properties without causing deformation under an external pressure at the time of freezing and thawing. Furthermore, a protruding material (a navel) formed on the surface of the cold reserving material at the time of freezing can be prevented.