Novel adhesives resistant and flexible obtained from fatty guanamines and diglycidyl ethers of polyalkylene glycols

摘要

Heat curable compositions comprise a diglycidyl ether of a polyalkylene glycol having the general formula:- FORM:0978876/C3/1 in which R is an alkylene radical having 2 to 5 carbon atoms and n is an integer from 2 to 50, and a fatty guanamine having the general formula:- FORM:0978876/C3/2 FORM:0978876/C3/3 FORM:0978876/C3/4 and FORM:0978876/C3/5 in which R1 is an aliphatic group having 4 to 21 carbon atoms and R2 is a divalent hydrocarbon group derived from a dimerized unsaturated fatty acid. A portion of the diglycidyl ether of a polyalkylene glycol may be replaced by an epoxy resin prepared from a polyfunctional epoxy resin and a polyhydric phenol which may be a phenol-aldehyde condensation product. The compositions may be used as such or may be first partially reacted to give a curable, homogeneous reaction product or B-stage resin. Dicyandiamide may be added to the unreacted composition prior to curing or partial reaction or may be added to the B-stage resin prior to curing. The compositions and the B-stage resins may be used as adhesives, coatings and sealants and in the preparation of laminates. Specifications 963,507, 965,588, 969,256 and 969,257 are referred to.