Abstract: An oil-in-water emulsion composition contains the following ingredients (A), (B) and (C): (A) an oil or fat having a diglyceride content of at least 50 wt %, in which at least 80 wt % of fatty acids constituting diglycerides are unsaturated fatty acids; (B) a mixture of polyglycerol fatty acid esters having an esterification degree of at least 80%, in which from 50 to 95 wt % of fatty acids constituting the polyglycerol fatty acid esters are C14-22 unsaturated fatty acids; and (C) yolk.

Abstract: An oil-in-water emulsion composition contains the following ingredients (A), (B) and (C): (A) an oil or fat having a diglyceride content of at least 50 wt %, in which at least 80 wt % of fatty acids constituting diglycerides are unsaturated fatty acids; (B) a mixture of polyglycerol fatty acid esters having an esterification degree of at least 80%, in which from 50 to 95 wt % of fatty acids constituting the polyglycerol fatty acid esters are C14-22 unsaturated fatty acids; and (C) yolk.

Abstract: The present invention provides a pressure-sensitive adhesive having a storage modulus from 1×105 to 1×106 dyne/cm2 and at a frequency of 1 Hz; and having a gel fraction of 55% or more when the storage modulus is measured at a temperature of 25° C. in dynamic viscoelasticity measurement. Its pressure-sensitive adhesive product can be obtained by the process, for example, for producing the (meth)acrylate emulsion-type pressure-sensitive adhesive which comprises adding the polymerization-initiator(s) at separate multi-steps to the present reaction system in the presence of polymerization-initiator(s) at the time of polymerizing alkyl (meth)acrylate and which comprises using a water-soluble polymerization-initiator at least one time during or after the second step of adding the polymerization-initiator(s).