or a c 2 c 18 acyl group and p is the same as defined in the above ch 2 ch 2 o p ch 2 ch ch 3 o q ch 2 ch 2 o r r 8 in which r 8 p q and r are the same as defined in the above or r 9 oh in which r 9 is a c 2 c 6 alkylene group and acryl or methacryl amide or its derivative of the formula wherein r 6 is the same as defined in the above r 10 is a hydrogen atom or a group of the formula ch 2 oh or ch 2 p n ch 3 2 in which p is the same as defined in the above the monomer s can be homo or co polymerized by a known method described in for example japanese patent kokai publication unexamined no 134786 1978 and the journal of the japanese association of adhesives vol 17 no 9 1981 371 the hydrophilic resin includes glyoxal resin melamine resin polyamide resin urethane resin acrylic resin triazine resin and the like some of the hydrophilic resins are commercially available under trade names of hw 100 dainippon ink and chemicals sumitex resin 901 1000 m 3 nr 2 ns 2 w 2 ar 2 and amh 3000 sumitomo chemical blencope.