Abstract: The present invention provides a coating agent, wherein an oxygen-barrier property enhancer, which is one or more of glucose, mannose, maltose, trehalose, fructose, raffinose, arabinose, nigerooligosaccharide, lactose, D-glucono-1,5-lactone, arginine hydrochloride, ferrous sulfate, sodium dihydrogen phosphate, mannitol, Palatinit, and vitamin C, is added to acid-treated yeast cell wall fractions consisting of cell residue obtained by removing the internal soluble cell components of enzyme-treated yeast, the residue being treated with an acidic aqueous solution to further remove the solubilized components, and which enables a film being formed by coating with the coating agents for an oxygen permeability test by using the coating agent to attain at 23° C. and relative humidity of 60% an oxygen permeability coefficient of<0.1 cm3 mm/m2atm 24 hr.

Abstract: A coated material and a process for producing the coated material which includes providing a coating agent comprising yeast cell wall fractions, as a primary constituent, consisting of cell residue of yeast which has been treated with enzymes, optionally subsequently with acidic solution, and water to remove internal soluble cell constituents; and coating a solid material with the coating agent to provide a coating thereon.

Abstract: A coated material and a process for producing the coated material which includes providing a coating agent comprising yeast cell wall fractions, as a primary constituent, consisting of cell residue of yeast which has been treated with enzymes, optionally subsequently with acidic solution, and water to remove internal soluble cell constituents; and coating a solid material with the coating agent to provide a coating thereon.

Abstract: The present invention provides a coating agent being applicable even in 100% water, not sticky, which results in the coated particles and/or granules that do not stick to each other, and further having a function to control dissolution time, and a film formed from the coating agent and useful as a packaging material having an extremely low oxygen permeability coefficient even under highly humid conditions. An oxygen-barrier property enhancer such as glucose, mannose, maltose, trehalose, fructose, arabinose, nigerooligosaccharide, lactose, D-glucono-1,5-lactone, arginine hydrochloride, ferrous sulfate, sodium dihydrogen phosphate, Palatinit, vitamin C, etc. is added to yeast cell wall fractions consisting of cell residue obtained by removing the internal soluble cell components of enzyme-treated yeast or acid-treated yeast cell wall fractions consisting of cell residue obtained by treating said fractions with an acidic aqueous solution. Thus, the coating agent is prepared.